title: NMR studies of the exchange reactions of CH3CN.BX3 with excess CH3CN /|nJoseph Fogelman. -- 260 St. Catharines, Ont. : [s. n.],

subject: Nuclear magnetic resonance.

abstract:
Exchange reactions between molecular complexes and excess acid
or base are well known and have been extensively surveyed in the
literature(l). Since the exchange mechanism will, in some way
involve the breaking of the labile donor-acceptor bond, it follows
that a discussion of the factors relating to bonding in molecular complexes
will be relevant.
In general, a strong Lewis base and a strong Lewis acid form a
stable adduct provided that certain stereochemical requirements are
met.
A strong Lewis base has the following characteristics (1),(2)
(i) high electron density at the donor site.
(ii) a non-bonded electron pair which has a low ionization potential
(iii) electron donating substituents at the donor atom site.
(iv) facile approach of the site of the Lewis base to the
acceptor site as dictated by the steric hindrance of the
substituents.
Examples of typical Lewis bases are ethers, nitriles, ketones,
alcohols, amines and phosphines.
For a strong Lewis acid, the following properties are important:(
i) low electron density at the acceptor site.
(ii) electron withdrawing substituents. (iii) substituents which do not interfere with the close
approach of the Lewis base.
(iv) availability of a vacant orbital capable of accepting
the lone electron pair of the donor atom.
Examples of Lewis acids are the group III and IV halides such
(M=B, AI, Ga, In) and MX4 - (M=Si, Ge, Sn, Pb).
The relative bond strengths of molecular complexes have been
investigated by:-
(i)
(ii)
(iii)
(iv)
(v]
(vi)
dipole moment measurements (3).
shifts of the carbonyl peaks in the IIIR. (4) ,(5), (6) ..
NMR chemical shift data (4),(7),(8),(9).
D.V. and visible spectrophotometric shifts (10),(11).
equilibrium constant data (12), (13).
heats of dissociation and heats of reactions (l~),
(16), (17), (18), (19).
Many experiments have bben carried out on boron trihalides in
order to determine their relative acid strengths. Using pyridine,
nitrobenzene, acetonitrile and trimethylamine as reference Lewis
bases, it was found that the acid strength varied in order:RBx3 >
BC1
3 >BF 3
• For the acetonitrile-boron trihalide and trimethylamine
boron trihalide complexes in nitrobenzene, an-NMR study (7) showed
that the shift to lower field was. greatest for the BB~3 adduct ~n~
smallest for the BF 3 which is in agreement with the acid strengths. If electronegativities of the substituents were the only
important effect, and since c~ Br ,one would expect
the electron density at the boron nucleus to vary as BF3<BC1~
BBr
3
and therefore, the acid strength would vary as BF~BC1)BBr3:
However, for the boron trihalides, the trend is in the opposite
direction as determined experimentally. Considerable back-bonding
(20), (21) between the halogen and the boron atoms has been proposed
as the predominating factor, i.e. ~rt- back-bond between a
lone electron pair on the halogen and the vacant orbital on the
boron site.
The degree of back-bonding varies inversely as the bo~on
halogen distance and one would therefore expect the B-F bond
to exhibit greater back-bonding character than the B-Cl or
B-Br bonds. Since back-bonding transfers electron density from
substituent to the boron atom site, this process would be expected
to weaken the Lewis acid strength. This explains the Lewis
acid strength increasing in the order BF 3 BC1 3 BBr 3 .
When the acetonitrile boron trihalide complex is formed,
the boron atom undergoes ~_cbange of hybridization from sp2 to
sp3. From a linear relationship between the heat of formation of
ethyl acetate adducts and the shift in the carbonyl I.R. stretch,
Drago (22) et al have proposed that the angular di~tortion of
the X-B-X bonds from sp2 (12 ) to sp3 (10 hybridization is proportional
to the amount of charge transferred, i.e. to the nature of the base,
and they have rejected the earlier concept of reorganization
energy in explaining the formation of the adduct bond (19).


title: Non-invasive measurement of trigeminal nerve somatosensory evoked potentials

subject:
Trigeminal nerve--Wounds and injuries.
Whiplash injuries.
Somatosensory evoked potentials.

abstract:
Whiplash injuries are common yet enigmatic to substantiate clinically.
Trigeminal somatosensory evoked potentials (TSEPs) were posited as an
indicator of trigeminal nerve conduction damage resulting from whiplash.
Alternating polarity square-wave current stimuli were applied transcutaneously
in the facial region. 379 recorded pilot trials from 27 participants (8 male and
19 female) were utilized to develop a non-invasive recording capability for
TSEPs. Stimulus intensity and artifact, cortical recording sites, stimulation
electrode design and placement were explored. Statistically significant
differences in amplitude of TSEP waveform components at 13, 19 and 27 ms
between uninjured and whiplashed participants were noted. Increased
stimulus intensity in whiplashed participants was observed to increase TSEP
amplitude. The present methodology and hardware are discussed and
directions for future advancement of the current process are outlined.


title: Novice teachers' perceptions of the extent to which the Brock University teacher education program focused on methods of promoting responsibility in students

contributor: Department of Graduate and Undergraduate Studies in Education

subject: Teachers--Training of--Ontario--St. Catharines.

subject: First year teachers--Ontario--St. Catharines.

subject: Perception.

subject: Responsibility.

abstract:
The purpose of this study was to determine novice
t~ache~s' perceptions of th~ extent to which the Brock
University teacher education program focused on strategies
for promoting responsibility in students.
Individual interviews were conducted with ten randomly
selected teachers who were graduates of this teacher
education program between the years of 1989 and 1992, and a
follow-up group discussion activity, with the same teachers,
was also held.
Findings revealed that the topic of personal
responsibility was discussed within various components of
the program, including counselling group sessions, but that
these discussions were often brief, indirect and
inconsistent.
Some of the strategies which the teachers used in their
own classrooms to promote responsibility in students were
ones which they had acquired from those counselling group
°sessions or from associate teachers. Various strategies
included: setting ~lear expectations of students with
positive and negative consequences for behaviour (e.g.,
material rewards and detentions, respectively),
cemmunic?ting'with other teachers an~ parents, and
-.
suspending students from school. A teacher's choice of any
particular strategy seemed to be affected by his or her personality, teaching sUbject and region of employment, as
well as certain aspects of the teacher education program.
It was concluded that many of the teachers appeared to
be controlling rude and vio~ent- behaviour, as opposed to
promoting responsible behaviour. Recommendations were made
for the pre-service program, as well as induction and inservice
programs, to increase teacher preparedness for
promoting responsible student behaviour. One of these
recommendations addressed the need to help teachers learn
how to effectively communicate with their students.


title: Nurses' attitudes toward computers before and two months after training

subject:
Nursing--Data processing.
Nurses--In-service training.
Nurses--Attitudes.

abstract:
This study examined nurses' attitudes toward computers
before training and 2 months after training.
A quantitative approach and a nonexperimental survey
design were used in this study. Stronge and Brodt's (1985)
instrument, Nurses' Attitudes Toward Computerization
Questionnaire, was used to assess 27 nurses' attitudes prior
to and 2 months after computer training. Demographic
variables also were collected on the questionnaires.
The results of this study showed that, overall, nurses
had positive attitudes towards computers in both
questionnaires. The results of the first questionnaire were
consistent with other studies. There were no studies that
involved a follow-up questionnaire using Stronge and Brodt's
(1985) instrument. Attitude scores of Questionnaire 2 were
higher than attitude scores of Questionnaire 1. More time
for nursing tasks, less time for quality patient care, and
threat to job security questions were found to be
statistically significant. This study found no statistical
significance between attitudes and demographic variables.
Younger nurses a~d nurses with fewer years of computer
experience were most likely to exhibit positive attitudes.
Implications for practice and future research were
discussed. Some limitations were identified and discussed.


title: Nursing staffs' perceptions of a generic service manager position

subject:
Nursing services--Administration.
Nurses--Attitudes.

abstract:
The recent reengineering within the health care industry has challenged many
assumptions regarding traditional structures and roles. Within a product-line
management structure, the traditional viewpoint that those who manage patient care
areas must have a nursing background, is an example of one such assumption being
challenged. The nursing profession is often seen as the greatest obstacle to the
implementation of a product-line management structure and generic manager
positions (does not require a nursing background), due to the perceived loss of
professional identity.
This qualitative study focused on how nursing staff within a chronic care and
rehabilitation facility perceived a generic service manager position. Focus groups
were conducted in three phases, over a 14 month period of time. The data
collected from the focus groups were then coded according to common themes.
Each phase was analyzed independently, with the study concluding with an analysis
and interpretation of the collective results.
The results of this study revealed a significant shift in how the nursing staff
perceived their professional identity and accountability in light of the
implementation of the generic Service Manager position. Initial reactions of
personal and professional vulnerability and resentment were seen to transform into
an increased ability to explicitly articulate the role of nursing. Changes in behavior
that were described included: increased consultation and collaboration with other


title: On the anharmonic, multi-phonon, Debye-Waller contributions to the phonon-limited resistivity of metals : applications to Na and K

subject:
Phonons--Scattering.
Electric resistance.
Heat resistant alloys.

abstract:
The anharmonic, multi-phonon (MP), and Oebye-Waller factor (OW)
contributions to the phonon limited resistivity (;0) of metals derived by
Shukla and Muller (1979) by the doubletime temperature dependent Green
function method have been numerically evaluated for Na and K in the high
temperature limit. The anharmonic contributions arise from the cubic and
quartic shift of phonons (CS, QS), and phonon width (W) and the interference
term (1). The QS, MP and OW contributions to I' are also derived
by the matrix element method and the results are in agreement with those
of Shukla and Muller (1979). In the high temperature limit, the contributions
to;O from each of the above mentioned terms are of the type BT2
For numerical calculations suitable expressions are derived for the
anharmonic contributions to ~ in terms of the third and fourth rank
tensors obtained by the Ewald procedure. The numerical calculation of
the contributions to;O from the OW, MP term and the QS have been done
exactly and from the CS, Wand I terms only approximately in the partial
and total Einstein approximations (PEA, TEA), using a first principle
approach (Shukla and Taylor (1976)). The results obtained indicate that
there is a strong pairwise cancellation between the: OW and MP terms,
the QS and CS and the Wand I terms.
The sum total of these contributions to;O for Na and K amounts to
4 to 11% and 2 to 7%, respectively, in the PEA while in the TEA they
amount to 3 to 7% and 1 to 4%, respectively, in the temperature range.


title: On the equation of state and atomic mean square displacement of crystals

subject:
Crystal lattices.
Crystals--Mathematical models.
Crystals--Thermal properties.

abstract:
We have presented a Green's function method for the calculation
of the atomic mean square displacement (MSD) for an anharmonic
Hamil toni an . This method effectively sums a whole class of
anharmonic contributions to MSD in the perturbation expansion in
the high temperature limit.
Using this formalism we have calculated the MSD for a nearest
neighbour fcc Lennard Jones solid. The results show an improvement
over the lowest order perturbation theory results, the difference
with Monte Carlo calculations at temperatures close to melting is
reduced from 11% to 3%.
We also calculated the MSD for the Alkali metals Nat K/ Cs
where a sixth neighbour interaction potential derived from the
pseudopotential theory was employed in the calculations. The MSD
by this method increases by 2.5% to 3.5% over the respective
perturbation theory results.
The MSD was calculated for Aluminum where different pseudopotential
functions and a phenomenological Morse potential were
used. The results show that the pseudopotentials provide better
agreement with experimental data than the Morse potential. An
excellent agreement with experiment over the whole temperature range is achieved with the Harrison modified point-ion pseudopotential
with Hubbard-Sham screening function.
We have calculated the thermodynamic properties of solid Kr
by minimizing the total energy consisting of static and vibrational
components, employing different schemes: The quasiharmonic theory
(QH), ).2 and).4 perturbation theory, all terms up to 0 ().4) of the
improved self consistent phonon theory (ISC), the ring diagrams up
to o ().4) (RING), the iteration scheme (ITER) derived from the
Greens's function method and a scheme consisting of ITER plus the
remaining contributions of 0 ().4) which are not included in ITER
which we call E(FULL). We have calculated the lattice constant,
the volume expansion, the isothermal and adiabatic bulk modulus,
the specific heat at constant volume and at constant pressure, and
the Gruneisen parameter from two different potential functions:
Lennard-Jones and Aziz.
The Aziz potential gives generally a better agreement with
experimental data than the LJ potential for the QH, ).2, ).4 and
E(FULL) schemes. When only a partial sum of the).4 diagrams is
used in the calculations (e.g. RING and ISC) the LJ results are in
better agreement with experiment. The iteration scheme brings a
definitive improvement over the).2 PT for both potentials.


title: On the Ewald method and the quartic Helmholtz free energy of an anharmonic metallic crystal

subject:
Metal crystals.
Helmholtz equation.
Linear free energy relationship.


title: On the formulation and the calculation of the harmonic contributions to the Debye-Waller factor in metals (sodium)

subject:
Metals--Effect of temperature on.
Sodium--Analysis.
Harmonic functions.

abstract:
The algebraic expressions for the anharmonic contributions to
the Debye-Waller factor up to 0(A ) and 0 L% ) £ where ^
is the scattering wave-vector] have been derived in a form suitable
for cubic metals with small ion cores where the interatomic potential
extends to many neighbours. This has been achieved in terms of
various wave-vector dependent tensors, following the work of Shukla
and Taylor (1974) on the cubic anharmonic Helmholtz free energy.
The contribution to the various wave-vector dependent tensors from
the coulomb and the electron-ion terms in the interatomic metallic
potential has been obtained by the Ewald procedure. All the restricted
multiple whole B r i l l o u i n zone (B.Z.) sums are reduced to single whole
B.Z. sums by using the plane wave representation of the delta function.
These single whole B.Z. sums are further reduced to the •%??
portion of the B.Z. following Shukla and Wilk (1974) and Shukla and
Taylor (1974).
Numerical calculations have been performed for sodium where the
Born-Mayer term in the interatomic potential has been neglected
because i t is small £ Vosko (1964)3 • *n o^er to compare our calculated
results with the experimental results of Dawton (1937), we
have also calculated the r a t io of the intensities at different temperatures
for the lowest five reflections (110), (200), (220), (310)
and (400) . Our calculated quasi-harmonic results agree reasonably
well with the experimental results at temperatures (T) of the order of
the Debye temperature ( 0 ). For T » © ^ 9 our calculated anharmonic
results are found to be in good agreement with the experimental results.The anomalous terms in the Debye-Waller factor are found not to be
negligible for certain reflections even for T ^ ©^ . At temperature
T yy Op 9 where the temperature is of the order of the
melting temperature (Xm) » "the anomalous terms are found to be
important almost for all the f i ve reflections.


title: On the path integral formulation and the evaluation of quantum statistical averages

subject:
Quantum statistics.
Quantum theory.
Feynman integrals.

abstract:
Four problems of physical interest have been solved
in this thesis using the path integral formalism.
Using the trigonometric expansion method of Burton
and de Borde (1955), we found the kernel for two interacting
one dimensional oscillators• The result is the same as
one would obtain using a normal coordinate transformation,
We next introduced the method of Papadopolous (1969),
which is a systematic perturbation type method specifically
geared to finding the partition function Z, or equivalently,
the Helmholtz free energy F, of a system of interacting
oscillators. We applied this method to the next three
problems considered•
First, by summing the perturbation expansion, we found
F for a system of N interacting Einstein oscillators^ The
result obtained is the same as the usual result obtained
by Shukla and Muller (1972) •
Next, we found F to 0(Xi)f where A is the usual Tan
Hove ordering parameter* The results obtained are the
same as those of Shukla and Oowley (1971), who have used
a diagrammatic procedure, and did the necessary sums in
Fourier space* We performed the work in temperature space•
Finally, slightly modifying the method of Papadopolous,
we found the finite temperature expressions for the Debyecaller
factor in Bravais lattices, to 0(AZ) and u(/K/ j,where K is the scattering vector* The high temperature
limit of the expressions obtained here, are in complete
agreement with the classical results of Maradudin and
Flinn (1963) .


title: Optimization of the valence energy variance of the CuH molecule

subject:
Molecules.
Valence (Theoretical chemistry)
Monte Carlo method.
Valence fluctuations.

abstract:
We developed the concept of split-'t to deal with the large molecules (in
terms of the number of electrons and nuclear charge Z). This naturally
leads to partitioning the local energy into components due to each electron
shell. The minimization of the variation of the valence shell local energy is
used to optimize a simple two parameter CuH wave function.
Molecular properties (spectroscopic constants and the dipole moment) are
calculated for the optimized and nearly optimized wave functions using the
Variational Quantum Monte Carlo method. Our best results are comparable
to those from the single and double configuration interaction (SDCI)
method.


title: Optimization of trial wave functions for use in quantum Monte Carlo with application to LiH

subject:
Lithium hydride.
Mathematical optimization.
Wave functions.
Monte Carlo method.
Quantum chemistry.

abstract:
Methods for both partial and full optimization of wavefunction
parameters are explored, and these are applied to the LiH molecule. A
partial optimization can be easily performed with little difficulty. But to
perform a full optimization we must avoid a wrong minimum, and deal with
linear-dependency, time step-dependency and ensemble-dependency
problems. Five basis sets are examined. The optimized wavefunction with a
3-function set gives a variational energy of -7.998 + 0.005 a.u., which is
comparable to that (-7.990 + 0.003) 1 of Reynold's unoptimized \fin ( a
double-~ set of eight functions). The optimized wavefunction with a double~
plus 3dz2 set gives ari energy of -8.052 + 0.003 a.u., which is comparable
with the fixed-node energy (-8.059 + 0.004)1 of the \fin. The optimized
double-~ function itself gives an energy of -8.049 + 0.002 a.u. Each
number above was obtained on a Bourrghs 7900 mainframe computer with
14 -15 hrs CPU time.


title: Organizational change: implications of culture and leadership in the transformation to a total quality management paradigm

subject: Total quality management.

subject: Organizational change.

subject: Corporate culture.

subject: Leadership.

subject: Hospitals--Ontario--Administration.

subject: Public hospitals--Ontario--Administration.

abstract:
The study was undertaken to investigate
organizational readiness for change to a total quality
management (TQM) paradigm as the corporate-wide strategy
within a long-term care facility. The focus of the study
was on leadership values and organizational cultural
characteristics that could either accelerate or impede the
change process at The Public Hospital. structurally, the
~tudy included 'three distinct components. The first
component examined the management philosophy outlined by
Deming (1986) and his contemporary Juran (1989) in order
to determine what leadership values best support the new
Total Quality Management paradigm. Secondly, this
information was compared to present leadership values at
The Public Hospital with the purpose of identifying
opportunities for improvement within the organization's
current culture as the hospital moves toward the desired
TQM culture. The final component, a roadmap, was
developed to reflect the most appropriate direction for
organizational change at The Public Hospital.


title: Out of the darkness and into the light : a study of inauthentic and authentic speech

subject:
Speech.
Oral communication.

abstract:
Introduction
Man can be described as the being who shows himself in
speech, and from birth to death is continually speaking.
Communication is so close to us, so woven into our very being,
that we have little understanding of the way it is constituted;
for it is as hard to obtain distance from communication as it
is to obtain distance from ourselves. All communication is not
alike. There are two basic modesl of communication, the inauthentic
and the authentic, between which there occurs a
constant tension.
It is in the inauthentic mode, points out Heidegger, that
we find ourselves "proximately and for the most part";
1. Being and Time, pg. 68
Dasein decides as to the way it will comport itself in
taking up its task of having being as an issue for it.
" •.• it~, in its very being 'choose' itself and win
itself; it can also lose itself and never win itself or
only "seem" to do so. But only in so far as it is
essentially something which can be authentic--that is,
something of its own--can it have lost itself and not
yet won itself."
2.
therefore Heidegger also terms it "everydayness".2 Caught up
in the world of everydayness, our speaking covers over and
conceals3 our rootedness in being, leaving us in the darkness
of untruth. The image of darkness may be inferred from
Heidegger's use of the image of "clearing,,4 to depict being as
2. ibid. pg. 69
"Dasein's average everydayness, however, is not to be taken
as a mere 'aspect'. Here too, and even in the mode of
inauthenticity, the structure of existentiality lies
~ priori and here too Dasein's being is an issue for it in
a definite way; and Dasein comports itself towards it the
mode of average everydayness, even if this is only the mode
of fleeing in the face of it and forgetfulness thereof."
3. ibid. pg. 59
"covering over" and "concealing" are 1;yays Dasein tries
to flee its task of having being as an issue for itself.
" ••• This being can be covered up so extensively that it
becomes forgotten and no question arises about it or its
meaning ••• n How everyday speaking accomplishes this will
be taken up in detail in the second chapter which explores
Dasein's everyday speech.
4. ibid, pg. 171
lI ••• we have in mind nothing other than the Existential -
ontological structure of this entity (Dasein), that it is
in such a way as to be its 'there'. To say that it is -'
illuminated' [tlerleuchtet"] means that as Being-in-theworld
it is cleared [gelichtetJ in itself7 not through any
other entity, but in such a way that it is itself the
clearing. Only for an entity which is eXistentially
cleared in this way does what is present-at-hand become
accessible in the light or hidden in the dark •••• "
3
dis-coveredness and truth. Our first task will be to explore
the nature of communication in general and then to explore each
of the modes manifested in turn. The structure of the inauthentic
mode of communication can be explored by asking the following
questions: What is this speaking about? Who is it that is
speaking and who is spoken to? Does this speaking show man in
his speech?
The authentic mode is distinguished by the rarity with
which we encounter it; as the inauthentic conceals, so the
authentic reveals our rootedness in being. Yet this rarity
makes it difficult to delineate its elusive structure clearly.
Its constituent elements can be brought into focus by asking
the same questions of this mode that we previously asked of
the inauthentic mode.
Our initial response to the disclosure of the authentic
mode is to attempt to abandon the inauthentic mode and leave the
darkness behind dwelling only in the "lighted place". All
through the ages, some men pushing this to extreme, have, upon
uncovering their relatedness to being, experienced a deep longing
to dwell in such a "place" of pure truth and oft times
denigrated or attempted to exclude the everyday world. Such
4.
flight is twice mistaken: first it atbempts to fix truth as
unchanging and static and secondly, it opposes this to untruth
which it seeks to abolish. This is both the wrong view of truth
and the wrong view of untruth as Heidegger points out in The
Origin of The-Work of Art:
The Way-to-be of truth, i.e., of discoveredness,
is under the sway of refusal. But this refusal
is no lack or privation, as if truth could be
simply discoveredness rid of all covers. If it
could be that, it would no longer be itself .
••• Truth in its way-to-be is untruth.5
Pure light is not the nature of Being nor is pure unconcealedness
possible for man. Failure to remember this is the failure to
realize that communication destroys itself in such flight because
it no longer maintains the contingency of its task, i.e., the
dis-closedness of being.
We are reminded of the strong attraction this flight from
darkness held for Plato. Light, truth and Being are all beyond
the darkness and have nothing to do with it. In Book VII of the
R~public, Socrates' explanation of the Allegory of the Cave to
Glaucon points to a decided preference men have for the "lighted
place".
5. The Origin Of The Work Of Art, pg. 42
5.
Come then, I said, and join me in this further
thought, and do not be surprised that those who
attained to this height are not willing to occupy
themselves with the affairs of men, but their souls
ever feel the upward urge and yearning for that
sojourn above. For this, I take it, is likely if
in this point too the likeliness of our image
holds. 6
Despite the attraction to pure truth, human communication
is more complex than putting down one mode of communication and
picking up another. Due to the fact that we are always on the
way, the title of my thesis will have to be amended: OUT OF THE
DARKNESS AND INTO THE LIGHT--AGAIN AND AGAIN. It must be this
way because this is what it means to be human. This is the
point made by Mephisto to Faust in pointing out that man,
standing between God and the devil, needs both darkness and light:
Er findet sich in einem ewigen Gl~t
Uns hat er in die Finsternis gebracht,
Und euch taugt einzig Tag und Nacht. 7
6. Republic z (517 c & d)
It should be noted however, that while the philosopherking
must be compelled to return to the cave for purely
political reasons, once he has taken adequate view of
the "brightest region of being" he has the full truth
and his return to darkness adds nothing to the truth.
7. Faust, pg. 188
6.
This thesis proposes to examine the grounds that give rise
to communication, uncovering the structure of its inauthentic
and authentic modes and paying close attention to tpeir interrelationship
and to their relationship to language as "the
house of Being": language that both covers and opens up man's
rootedness in Being, transforming him as he moves along his way,
taking up his "ownmost task" of becoming who he is.

roots. He is the being who shows himself inn that reflects his forgetfulness or
remembrance of his rootedness in being.
Man comes into an already existent world and is addressedl
through things in the world which are c


title: Palaeopigment accumulation and implcations for paleolimnology over the lost century for two Ontario lakes

subject: Paleolimnology--Ontario--Crawford Lake.

subject: Lake ecology--Ontario--Crawford Lake.

subject: Lake ecology--Ontario--Lady Evelyn Reservoir.

subject: Pigments (Biology)

subject: Paleolimnology--Ontario--Lady Evelyn Reservoir.

abstract:
Crawford Lake is a meromictic lake, which is 24 m deep and has
an area of 2.5 ha, and has never been reported to have mixed below
16 m. Lady Evelyn Lake, which became a reservoir when a dam was
built in 1916, is dimictic with a maximum depth of about 35 m.
1
My research proved that both native chlorophylls and the ratio of
chlorophyll derivatives to total carotenoids were better preserved in
the shallower lake (Crawford Lake) because it was meromictic. Thus the
anaerobic conditions in Crawford Lake below 16 m (monimolimnion)
provide excellent conditions for pigment preservation. Under such
conditions, the preservation of both chlorophylls and carotenoids,
including oscillaxanthin and myxoxanthophyll, are extremely good
compared with those of Lady Evelyn Reservoir, in which anaerobic
conditions are rarely encountered at the mud-water interface.
During the period from 1500 to 1900 A. D. in Crawford Lake, the
accumulation rates of oscillaxanthin and myxoxanthophyll were
extremely high, but those of chlorophyll derivatives and total
carotenoids were relatively low. This was correlated with the presence
of a dense benthic mat of cyanobacteria near the lake's chemocline.
Competition for light between the deep dwelling cyanobacteria and
overlying phytoplankton in this meromictic lake would have been
intensified as the lake became more and more eutrophic
(1955-1991 A. D.).
During the period from 1955 to 1991 A. D., the accumulation rates
of chlorophyll derivatives and total carotenoids in the sediment core
from Crawford Lake (0-7.5 cm, 1955-present) increased. During this
same period, the accumulation rates of cyanobacterial pigments (Le. oscillaxanthin and myxoxanthophyll) declined as the lake became more
eutrophic.
Because the major cyanobacteria in Crawford Lake are benthic
mat forming Lyngbya and Oscillatoria and not phytoplankton,
eutrophication resulted in a decline of the mat forming algal pigments.
This is important because in previous palaeolimnological studies the
concentrations of oscillaxanthin and myxoxanthophyll have been used
as correlates with lake trophic levels.
The results of organic carbon a13c analysis on the Crawford Lake
sediment core supported the conclusions from the pigment study as
noted above. High values of a13c at the depth of 34-48 cm
(1500-1760 A. D.) were related to a dense population of benthic
Oscillatoria and Lyngbya living on the bottom of the lake during that
period. The Oscillatoria and Lyngbya utilized the bicarbonate, which had
a high a 13C value. Very low values were found at 0-7 cm in the
Crawford sediment core. At this time phytoplankton was the main
primary producer, which enriched 12C by photosynthetic assimilation.


title: Paleoindicators of meromixis

subject:
Paleolimnology--Lake, Crawford.
Limnology--Lake, Crawford.
Lakes--Lake Crawford.

abstract:
This study was undertaken to ascertain whether meromictic lakes could
be differentiated from holomictic lakes on the basis of their surficial
profundal sediments. Surface sediment cores (15 cm long) were collected
from both the littoral and profundal zones of four meromictic and six
holomictic lakes and analyzed for total number of fossil chironomid
headcapsu~es, chlorophyll and carotenoid degradation products as well as
\
iron and manganese concentrations.
Littoral and profundal comparisons of the surface sediments were
made between the two lake types using the Mann-Whitney U test. Iron,
manganese and the iron to manganese ratio in the littoral sediments of
meromictic lakes were significantly lower than those found in the littoral
sediments of holomictic lakes. The observed differences are believed to
represent an artifact of the significantly higher carbonate concentrations
found in three of the four meromictic lakes studied.
Profundal and littoral to profundal ratio comparison between holomictic
and meromictic lakes suggest that the significantly lower iron and higher
carotenoid concentrations in meromictic profundal sediments were a
con~equence of meromixis. However, the overlap in distribution exhibited
by both iron and carotenoid degradation products between the two lake
types was sufficiently large in this study to nullify their use as a
means of differentiating meromictic from holomictic lakes.
A long core (4.25 m) was removed from the deepest part of the
meromictic Crawford Lake (Ontario), sectioned at 5 cm intervals, and analyzed to assess when meromixis occurred, based on its fossil record.
Temporal changes in the total number of chironomid headcapsules, and
chlorophyll and carotenoid sediment degradation products were closely
correlated with organic matter, indicating in my opinion that extensive
redeposition of littoral chironomid headcapsules in the profundal zone
has occurred. Temporal variations in carotenoid degradation products, in
response to changes in organic matter, obscured increased preservation that
may have occurred as a consequence of meromixis. Temporal variations in
iron and manganese suggest that relatively stable redox conditions have
existed throughout most of the lake's history. Therefore it would appear
that Crawford Lake has been meromictic since its inception.


title: Palladium and platinum complexes of vitamin Bâ

subject:
Palladium.
Platinum.
Vitamin B1.
Platinum compounds.

abstract:
Palladium and platinum complexes of pyridoxamine, pyridoxine and
pyridoxal have been prepared. The structures of the complexes
PtCI2PM.H20, trans-PdC12 (PN)2 and [PLH+ ]2[PtC16] 2- ,H20 have been determined
by use of single crystal x-ray studies. The compounds PdC12PH,
trans-PdC12 (PN) 2 , cis-PdCI2 (PN)2 and cis PdC12 (PL)2 were also studied
by use of carbon-13 nmr spectroscopy. All the complexes have also been
characterised by use of infrared spectral studies.
In the complexes, PtCI2PM.H20 and PdC12PM, the ligand pyridoxamine is
chela ted to the metal through the aminomethyl nitrogen and the phenolate
oxygen atoms whereas in the complexes, trans-PdCI2 (PN)2' cis-PdCI2 (PN)2
and cis-PdC12 (PL)2 the vitamin B6 ligands are coordinated to the metal
through the pyridine ring nitrogen. The compounds [PLH+ ]2[PtCI6] 2- .H20
and [PMH2] 2+ [PdCI4] 2- .H20have no direct metal-ligand bonding, In all
the complexes, the metal maintains a square planar coordination except
in [PLH +] 2[PtCI6] 2- ,H20 where the metal is octahedrally coordinated.
PH pyridoxamine
[PMH ] 2+ = diprotonated pyridoxamine
2
PN = pyridoxine
PL pyridoxal
PLH+ protonated pyridoxal


title: Paragenetic history of the Ordovician Trenton Group carbonates, Southwestern Ontario

subject: Paragenesis.

subject: Rocks, Carbonate--Ontario, Southwestern.

subject: Groups (Stratigraphy)--Ontario, Southwestern.

subject: Geology, Stratigraphic|yOrdovician.

subject: Geology--Ontario, Southwestern.

abstract:
Geochemical examination of the rock matrix and cements from core
material extracted from four oil wells within southwestern Ontario suggest
various stages of diagenetic alteration and preservation of the Trenton
Group carbonates. The geochemical compositions of Middle Ordovician
(LMC) brachiopods reflect the physicochemical water conditions of the
ambient depositional environment. The sediments appear to have been
altered in the presence of mixed waters during burial in a relatively open
diagenetic microenvironment. Conodont CAl determination suggests that
the maturation levels of the Trenton Group carbonates are low and
proceeded at temperatures of about 30 - 50°C within the shallow burial
environment.
The Trenton Group carbonates are characterized by two distinct
stages of dolomitization which proceeded at elevated temperatures. Preexisting
fracture patterns, and block faulting controlled the initial
dolomitization of the precursor carbonate matrix. Dolomitization
progressed In the presence of warm fluids (60 75°C) with
physicochemical conditions characteristic of a progressively depleted
basinal water. The matrix is mostly Idiotopic-S and Idiotopic-E dolomite,
with Xenotopic-A dolomite dominating the matrix where fractures occur.
The second stage of dolomitization involved hydrothermal basinal fluid(s)
with temperatures of about 60 - 70°C. These are the postulated source for
the saddle dolomite and blocky calcite cements occurring in pore space and
fractures. Rock porosity was partly occluded by Idiotopic-E type dolomite.
Late stage saddle dolomite, calcite, anhydrite, pyrite, marcasite and minor
sphalerite and celestite cements effectively fill any remaining porosity
within specific horizons. Based on cathode luminescence, precipitation of
the different diagenetic phases probably proceeded in open diagenetic
systems from chemically homogeneous fluids. Ultraviolet fluorescence of
11
the matrix and cements demonstrated that hydrocarbons were present
during the earliest formation of saddle dolomite.
Oxygen isotope values of -7.6 to -8.5 %0 (PDB), and carbon isotope
values of - 0.5 and -3.0 %0 (PDB) from the latest stage dog-tooth calcite
cement suggest that meteoric water was introduced into the system during
their formation. This is estimated to have occurred at temperatures of
about 25 - 40°C.
Specific facies associations within the Trenton Group carbonates
exhibit good hydrocarbon generating potential based on organic carbon
preservation (1-3.5%). Thermal maturation and Lopatin burial-history
evaluations suggest that hydrocarbons were generated within the Trenton
Group carbonates some time after 300 Ma .
Progressively depleted vanadium trends measured from
hydrocarbon samples within southwestern Ontario suggests its potential
use as a hydrocarbon migration indicator on local (within an oilfield) and
on regional scales.


title: Parental beliefs as predictors of children's externalizing behaviors

subject:
Conduct disorders in children.
Aggressiveness in children.
Parent and child.
Parental influences.

abstract:
The relationship between maternal beliefs about
children's externalizing behaviors (EB) and the frequency
of their children's EB was investigated. The sample of 71
consisted of two groups of mothers of children between 8-12
years of age. The Clinic group consisted of 35 mothers of
children referred to a Children's Clinic due to
externalizing behavior problems. The School group
consisted of 36 mothers of children attending elementary
school. Mothers completed questionnaires measuring
parental beliefs and the frequency of their children's EB.
Results showed that mothers' endorsement of authoritarian
parenting was positively related to children's EB scores.
A U-shaped relationship was found between mothers'
relationship-centered goals and children's EB scores.
Parent-centered goals and children's EB scores were
positively correlated only in the clinic group. Mothers'-hostile
attribution scores were positively related to their
children's EB scores in both groups. Mothers with low
perceived parenting scores were associated with higher
children's EB scores in both groups. Overall, results
revealed potential clinical implications. Parenting
programs that change parenting goals, attributions, and
ii
Parental Beliefs
sense of parenting control, which in turn influences
parenting behavior, may influence the frequency of their
children's externalizing behaviors.


title: Parental care in the common tern (Sterna Nirundo): sexual roles in a monogamous seabird

subject:
Common tern.
Sea birds--Ontario--Port Colborne.
Sexual behavior in animals.

abstract:
The parental behaviour of male and female Common Terns
(Sterna hirundo) was documented throughout two breeding
seasons at a colony near Port Colborne , Ontario. Thirteen and
fourteen pairs of terns were chosen for intensive study in 1982
and 1983, respectively. The delivery of fish by males to their
mates ("courtship feeding") occurred prior-to, during, and
following the egg-laying period. Following the laying of the
second egg, courtship feeding rates declined significantly. There
was a significant, positive correlation bebween courtship feeding
rates and subsequent chick feeding rates by males.
The incubation rates of females were significantly higher
than those of males, especially during the first ten days of
incubation. Territorial attendance rates during the incubation
stage were similar for males and females. During the chick
stage, territorial attendance rates of females were significantly
higher than those of males. The size of fish fed to chicks by
males increased as the chicks grew older and chick feeding rates
of males were approximately three times higher than female rates.
Based on these quantitative differences in parental care
activities, the cumulative parental time investment by the two
sexes was very similar. However, the energetic investment by
males was likely greater than that by females, since male
parental contributions (e.g. courtship feeding and chick feeding)
often entailed extensive foraging behaviour.


title: Partial characterization of the cloned dihydrofolate reductase gene of Saccharomyces cerevisiae

subject:
Saccharomyces cerevisiae.
Escherichia coli.
Plasmids.
Yeast.

abstract:
The cloned dihydrofolate reductase gene of Saccharomyces
cerevisiae (DFR 1) is expressed in Escherichia coli. Bacterial strain
JF1754 transformed with plasmids containing DFR 1 is at least 5X more
resistant to inhibition by the folate antagonist trimethoprim.
Expression of yeast DFR 1 in E. coli suggests it is likely that the
gene lacks intervening sequences. The 1.8 kbp DNA fragment encoding
yeast dhfr activity probably has its own promotor, as the gene is
expressed in both orientations in E. coli.
Expression of the yeast dhfr gene cloned into M13 viral vectors
allowed positive selection of DFR 1 - M13 bacterial transfectants in
medium supplemented with trimethoprim. A series of nested deletions
generated by nuclease Bal 31 digestion and by restriction endonuclease
cleavage of plasmids containing DFR 1 physically mapped the gene to a
930 bp region between the Pst 1 and Sal 1 cut sites. This is
consistent with the 21,000 molecular weight attributed to yeast dhfr
in previous reports.
From preliminary DNA sequence analysis of the dhfr DNA fragment
the 3' terminus of DFR 1 was assigned to a position 27 nucleotides
from the Eco Rl cut site on the Bam Hi - Eco Rl DNA segment. Several
putative yeast transcription termination consensus sequences were
identified 3' to the opal stop codon.
DFR 1 is expressed in yeast and it confers resistance to the
antifolate methotrexate when the gene is present in 2 - 10 copies per
cell. Plasmid-dependent resistance to methotrexate is also observed in
a rad 6 background although the effect is somewhat less than that conferred to wild-type or rad 18 cells. Integration of DFR 1 into the
yeast genome showed an intermediate sensitivity to folate antagonists.
This may suggest a gene dosage effect. No change in petite induction
in these yeast strains was observed in transformed cells containing
yeast dhfr plasmids.
The sensitivity of rad 6 , rad 18 and wild-type cell populations
to trimethoprim were unaffected by the presence of DFR 1 in
transformants. Moreover, trimethoprim did not induce petites in any
strain tested, which normally results if dhfr is inhibited by other
antifolates such as methotrexate. This may suggest that the dhfr
enzyme is not the only possible target of trimethoprim in yeast.
rad 6 mutants showed a very low level of spontaneous petite
formation. Methotrexate failed to induce respiratory deficient
mutants in this strain which suggested that rad 6 might be an
obligate grande. However, ethidium bromide induced petites to a level
approximately 50% of that exhibited by wild-type and rad 18 strains.


title: Participation of registered nurses in continuing education

subject:
Nurses--Education--Ontario.
Continuing education--Ontario.

abstract:
This correlational study investigated the psychological types, learning style preferences,
readiness for self-directed learning, demographic and continuing education participation data of
154 registered nurses at two different Southern Ontario hospitals. One hospital was a large
tertiary care university-affiliated teaching centre (Cityview) and the other was a smaller
secondary care community hospital (Waterview). The instruments used in the study were the
PET Type Check, Kolb's Learning Style Inventory, the Self-Directed Readiness Scale
(SDLRS), and a Nursing Survey developed by the researcher. Descriptive statistics, crosstabulations
and correlational analyses were calculated. The most common psychological types
identified among this sample of nurses were extraverted thinking, introverted intuitive and
extraverted intuitive. There were no significant differences between the two hospitals.
The accommodator learning style was preferred overall, with more nurses at
Waterview Hospital preferring the diverger learning style, and more nurses at Cityview
Hospital preferring the accommodator learning style.
The majority of nurses scored in the average and above average categories on the
SDLRS, indicating that they perceive themselves as ready to engage in self-directed learning.
At Cityview Hospital there were more nurses in the average and high readiness categories,
whereas at Waterview Hospital more nurses scored in the below average category.
No significant correlations were found for learning style with psychological type, or for
learning style with SDLRS scores.
A positive correlation was found to exist between SDLRS scores and each of the
psychological types extraverted feelings, extraverted thinking, and introverted intuitive.The only significant correlation for psychological type and continuing education
activity was a positive correlation between extraverted thinking types and participation in
informal discussion or study groups.
Positive correlations were found for SDLRS scores with each of the following
continuing education activities; number of hours per month spent reading journals; journal
reading; attendance at credit courses; watching videos; using reference texts.
Further details of the results are included as well as a discussion of the findings and
implications for future research.


title: Partnership, politics and public administration: a case study of the Ontario Ministry of Natural Resources

subject: Natural resources--Government policy--Ontario--Case

subject: Executive departments--Ontario--Case studies.

subject: Public administration--Ontario--Case studies.

subject: Partnership--Ontario--Case studies.

abstract:
Efforts to reform the public sector reflect the social, political and
economic environment within which government must function. The recent
demands by the public for more consensual decision-making, as well as more
efficient, effective and responsive public service, have resulted in a number
of reform initiatives, including an emphasis on partnership development.
The purpose of this thesis is to examine partnership arrangements within
the public sector. Specifically, the thesis will assess the value of partnerships
and their impact on government by examining six partnership arrangements
involving the Ontario Ministry of Natural Resources (OMNR). The OMNR,
having recently been awarded the 1992 Institute of Public Administration of
Canada Award for Innovative Management, on the theme of partnership
development, is being lauded as an example for other government agencies
considering similar alliances.
The thesis begins by introducing the concept and practice of partnership
within the public sector in general and the OMNR specifically. Descriptive
analysis of six OMNR partnerships is provided and a number of criteria are
used to determine the success of each of these arrangements. Special
attention is paid to the political implications of partnerships and to those
attributes which appear to contribute to the successful establishment and
iii
maintenance of partnership arrangements.
The conclusion is drawn that partnerships provide the government with
an opportunity to address public demands for greater involvement in
decision-making while accommodating government's limited financial
resources. However, few truly collaborative partnerships exist within the
public sector. There are also significant political implications associated with
partnerships which must be dealt with both at the political and bureaucratic
levels of government. Lastly, it is argued that while partnerships within the
OMNR are experiencing some difficulties, they constitute a genuine attempt
to broaden the base of decision-making and to incorporate the concerns of
stakeholders into resource management.


title: Patterns of faunal change at an upper Cambrian trilobite extinction event, Nolichucky Formation, Tennessee and Virginia

subject:
Trilobites--Tennessee.
Trilobites--Virginia.
Extinction (Biology)
Paleontology.

abstract:
During the Upper Cambrian there were three mass
extinctions, each of which eliminated at least half of the trilobite
families living in North American shelf seas. The Nolichucky
Formation preserves the record of one of these extinction events
at the base of the Steptoean Stage.
Sixty-six trilobite collections were made from five sections
In Tennessee and Virginia. The lower Steptoean faunas are
assigned to one low diversity, Aphelaspis-dominated biofacies,
which can be recognized in several other parts of North America.
In Tennessee, the underlying upper Marjuman strata contain two
higher diversity biofacies, the Coosella-Glaphyraspis Biofacies and
the Tricrepicephalus-Norwoodiid Biofacies. At least four different
biofacies are present in other parts of North America: the
Crepicephalus -Lonchocephalus Biofacies, the Kingstonia Biofacies,
the Cedaria Biofacies, and the Uncaspis Biofacies.
A new, species-based zonation for the Nolichucky Formation
imcludes five zones, three of which are new. These zones are the
Crepicephalus Zone, the Coosella perplexa Zone, the Aphelaspis
buttsi Zone, the A. walcotti Zone and the A. tarda Zone.
The Nolichucky Formation was deposited within a shallow
shelf basin and consists largely of subtidal shales with stormgenerated
carbonate interbeds. A relative deepening is recorded
In the Nolichucky Formation near the extinction, and is indicated
In some sections by the appearance of shale-rich, distal storm
deposits above a carbonate-rich, more proximal storm deposit
sequence. A comparable deepening-upward sequence occurs near
the extinction in the Great Basin of southwestern United States
and in central Texas, and this suggests a possible eustatic control.
In other parts of North America, the extinction IS recorded
In a variety of environmental settings that range from near-shore
to slope. In shelf environments, there is a marked decrease in
diversity, and a sharp reduction in biofacies differentiation.
Although extinctions do take place in slope environments, there IS
no net reduction in diversity because of the immigration of
several new taxa.


title: Perceptions of leadership in adolescent girls, members of the Girl Guides of Canada

subject:
Girl Scouts--Canada.
Girls--Canada--Societies and clubs.
Leadership.
Teenage girls--Canada.

abstract:
Twenty-eight young women who were members of the Girl
Guides of Canada as Rangers and Cadets from a convenience
sample chose to participate in this case study. They were
from four separate locations in Southern Ontario. The
interviews and observations at unit meetings allowed an indepth
look into the perceptions of leadership of these young
women. The amount of time observing and interacting with
each participant provided a snapshot of what they thought
and how they responded to the questions asked at that
particular time. Each girl responded to the question, "Are
you a leader?" They then gave examples of their own
leadership and described leaders they knew. Their responses
are reported in relation to their definitions. Their
identifications of effective and ineffective leaders were
examined, as well as their views of the best and worst
things a leader can do. This information is reported by
unit, as some patterns in their responses emerged which were
unique to each group. The responses of all of the girls to
the leadership of Guiders, Rangers and Cadets and the
hypothetical effect of male leaders and male Rangers in
Guiding are reported. For these, the participants' views
were sorted based on the common themes/ and regardless of
their group affiliation, since many of the same themes
emerged when examining these questions. The information collected was extensive and allowed for trends and parallels
to become evident 0 All of the participants identified
themselves as leaders. A diversity of views exists in their
perceptions of leadership. For many, age makes a difference
in leadership. The majority identified the single-sex
aspect of the organization as comfortable and stated that it
should remain so. Gender profoundly affects who is listened
to and what opportunities are available.


title: Permissivity of human HeLa cells to bovine adenovirus type 2 (BaV2 infection

subject:
HeLa cells.
Adenoviruses.

abstract:
Infection of hUlnan cells by bovine adenovirlls type 2 (BAV2) is abortive. To obtain a better
understanding of this pllenomel1011, and in particular to identify Wllich steps in the viral
replicative cycles are altered dllring this virlls-host cells interaction, we have llndertaken a
detailed study of BAV2 infections of the nonpennissive hUlnan IIeLa cells. Using
autoradiography and 3H-thymidine-labeled vvhole virus particles for infection of HeLa cells, vve
determined that viral attachluent appears normal. Furthermore, Southern analysis revealed that
internalization and transport to the nuclells occurs in BAV2 infected HeLa cells. To investigate
viral DNi\ synthesis, infectivity assays involving hydroxyllrea, a viral DN-A synthesis inhibitor,
were carried out. The results revealed that Bft:LV2 DNA synthesis does not occur in HeLa cells.
Fllrtller investigations into viral early gene expression by northern blotting analyses indicated
that HeLa cells fail to support expression of EIA. This suggested that abortive infection by
BAV2 could be attributed to faiiure of EIA to express. To test the possibility that the failure to
express ElA was due to the inability of the host cell to recognize the E lA prOlTIoter, ,ve carried
out transient expression transfection experiments using plaslnids \vith the bacterial lacZ linder
the control of either BAV2 or i\d5 EIA promoter. X-gal histochelIlical assays sho\ved
expression of lacZ from the Ad5 ElA prOlnoter but no expression of lacZ [rOln the BAV2 EIA
prOlTIoter. This further suggests that the abortive infection b:y BAV2 could be attributed to failure
of EIA to express dlle to a nonfllnctional prOlTIoter in hlunan cells. Thus we speClllated that
abortive infection of HeLa cells by adenoviruses may be averted by providing EtA functions in
trans. To demonstrate this, we coinfected HeLa cells with Ad5 and BAV2, reasoning that Ad5
could cOlnpensate for EIA deficiency in BAV2. OUf results showed that BAV2 DNA synthesis
was indeed Sllpported in HeLa cells coinfected with Ad5dlE3 as revealed by Southern analysis.
In contrast, coinfection of HeLa cells \vith BAV2 and Ad5dlElE3 mutallt did not support BLt\V2
DNA synthesis. Interestingly, BAV2 failed to replicate in 293 cells which are constitlltively
expressing the El genes. This could ilnply that El is necessary but not sufficient to avert the
failllre ofBAV2 to undergo productive infection ofhulnan cells.


title: Personality type and self-directed learning

subject:
Adult education.
Learning.
Typology (Psychology)
Personality.

abstract:
This correlational study was designed to investigate
the relationship between self-directed learning and
personality type. A sample of 133 graduate and
undergraduate education students completed the MBTI and
the SDLRS. Two hypotheses were examined: (a) scores on
the intuitive scale will account for a significant
amount of the variance in the prediction of selfdirected
learning readiness and, (b) scores on the
introverted scale will account for a significant amount
of the variance in self-directed learning readiness.
Stepwise multiple regression analyses indicated that
psychological type accounts for 28% of the variance in
self-directed learning. Support for the first
hypothesis was found with 15% of the variance in selfdirected
learning accounted for by intuition. The
second hypothesis was not supported. Introversion
accounted for 13% of the variance but in a negative
manner. Results of this study indicate that
personality type does influence the ability of the
learner to be self-directed in studies. These findings
add another dimension for the adult educator to
consider when attempting to develop self-directedness
in learners.


title: Petrography, geochemistry and structure of the Timmins area, Ontario

subject:
Petrology--Ontario--Timmins area.
Geochemistry--Ontario--Timmins area.
Geology--Ontario--Timmins area.
Geology, Structural.

abstract:
Regional structural analysis of the Timmins area
indicates four major periods of tectonic deformation. The
DI deformation is characterized by a series of isoclinal FI
folds which are outlined in the study area by bedding,
pillow tops and variolitic flows. The D2 deformation developed
the Porcupine Syncline and refolded the Fl folds
about a NE. axis. A pervasive S2 foliation developed
during low grade (greenschist) regional metamorphism
associated with the D2 deformation. The S2 foliation developed
south of the Destor-Porcupine Break. The third
phase of tectonic D3 deformation is recognized by the development
of a S3 sub-horizontal crenulation cleavage which developed
on the plane of the S2 foliation. No meso scopic
folds are associated with this deformation. The 8
3
crenulation
cleavage is observed south of the Destor-Porcupine
Break. The D4 tectonic deformation is recorded as a subvertical
S4 crenulation cleavage which developed on the
plane of the S2 foliation and also offsets the S3 crenulation
cleavage. Macroscopic F4 folds have refolded the
F2 axial plane. No metamorphic recrystallization is associated
with this deformation. The S4 crenulation cleavage is
observed south of the Destor-Porcupine Break.
Petrographic evidence indicates that the Timmins
area has been subjected to pervasive regional low grade
(greenschist) metamorphism which has recrystallized the
original mineralogy. South of the study are~ the Donut
Lake ultramafic lavas have been subjected to contact
medium grade (amphibolite facies) metamorphism associated
with the intrusion of the Peterlong Lake Complex.
The Archean volcanic rocks of the Timmins area
have been subdivided into komatiitic, tholeiitic and calcalkaline suites based on Zr, Ti0 2 and Ni. The three elements
were used because of their r e lative immobility during subsequent
metamorphic events.
Geochemical observations in the Timmins area
indicates that the composition of the Goose Lake and Donut
Lake Formations are a series of peridotitic, pyroxenitic and
basaltic komatiites. The Lower Schumacher Formation is a
sequence of basaltic komatiites while the upper part of
the Lower Schumacher Formation is an intercalated sequence
of basaltic komatiites and low Ti0
2
tholeiites. The variolitic
flows are felsic tholeiites in composition and geochemical
evidenc e sugg ests that they developed as a n immiscible
splitting of a tholeiitic magma. The Upper Schumacher
Formation is a sequence of tholeiitic rocks dis p laying a
mild iron enrichment. The Krist and Boomerang Formations
are the felsic calc-alkaline rocks of the study area which
are characteristically pyroclastic. The Redstone Fo rmation
is dominantly a calc-alkali ne sequence of volcani c rocks
whose minor mafic end me mbers exposed in 1t.he study hav e
basaltic komatiitic compositions. Geochemical evidence
sugges ts that the Keewatin-type se dimentary rocks have a
composition similar to a quartz diorite or a granodiorite.
Fi e l d obs ervations and petrographic evidence suggests that
they were derived fr om a distal source and now repr esent
i n part a turbidite sequence. The Timiskaming-type
sedimentary rocks approach the c omp osi t ion of the felsic
calc-alkaline rocks of the study area . The basal conglomerate
in the study are a sugge s ts that th e uni t was derived
fr om a proximal source.
Petrographic and ge ochemical evidence suggests
that the peridotitic and pyroxenitic komatiites originated
as a 35-55% partial melt within the mantle, in excess of
100 Km. depth. The melt ros e as a diapir with the subsequent effusion of the ultramafic lavas,
The basaltic komatiites and tholeiitic rocks
originated in the mantle from lesser degrees of partial
melting and fractionated in low pressure chambers.
Geochemical evidence suggests a "genetic link" between
the basaltic komatiites and tholeiites,
The calc-alkaline rocks developed as a result of
the increa.se In PO in the magma chamber. The felsic calcalkaline
rocks are a late stage effusion possibly the last
major volcanic eruptions in the area.


title: Petrography, Petrochemistry and petrogenesis of Huronian volcanic rocks of the Elliot Lake region, Ontario

subject: Geology--Ontario--Elliot Lake Region.

subject: Geology, Stratigraphic|yHuronian.

subject: Volcanic ash, tuff, etc.--Ontario--Elliot Lake Region.

subject: Petrology--Ontario--Elliot Lake Region.

subject: Petrogenesis--Ontario--Elliot Lake Region.

abstract:
In the Elliot lake region of northern Ontario, Yolcanlc lava piles
represent the lowermost units of the Huronian SUpergroup. These rocks
general1y trend east-west and belong to the Elliot lake Group. They are
s1tuated on the north and south limbs or the QuIrke lake Syncline.
The volcanIc rocks of this study contain a secondary minerai
assemblage consisting of actinolite, biotite, chlorIte, eptdote/cllnozoislte
tttanomagnettte and calcite characteristic of greenschist metamorphism.
Compilation of data suggests that metamorphism of the volcanic rocks
proceeded between 325- and 425-C and between 2.4 and 4.7 kb.
Geochemtcally these lavas represent tholeiitic and calc-alkaline
assemblages. The tholeiites are character1sttcally enriched tn Fe and Tt
and consist mainly of basalts, basaltic andesites and andesites. These
rocks are believed to have formed by the partIal melting of a peridottte
source at low P-T. In contrast, the calc-alkaline rocks are depleted in Fe
and TI, but show a signIficant enrichment In 51 and Zr; andesIte Is the major
rock type for thIs assemblage. I·t Is postUlated that the calc-alkalIne sU1te
of rocks was the result of eIther the partIal meltIng of abasaltic·magma at
shallow depth, or the melttng of s1al1c crustal materIal due to the added
we1ght of tholeiitIc material on an unstable crust and to downwarplng
processes Inttlated by convection cells.


title: Phonon dispersion curves and atomic mean square displacement for several fcc and bcc materials

subject:
Photons--Scattering.
Green's functions.
Lattice dynamics.
Metals.

abstract:
The atomic mean square displacement (MSD) and the phonon dispersion
curves (PDC's) of a number of face-centred cubic (fcc) and body-centred
cubic (bcc) materials have been calclllated from the quasiharmonic (QH)
theory, the lowest order (A2
) perturbation theory (PT) and a recently proposed
Green's function (GF) method by Shukla and Hiibschle. The latter
method includes certain anharmonic effects to all orders of anharmonicity.
In order to determine the effect of the range of the interatomic interaction
upon the anharmonic contributions to the MSD we have carried out our
calculations for a Lennard-Jones (L-J) solid in the nearest-neighbour (NN)
and next-nearest neighbour (NNN) approximations. These results can be
presented in dimensionless units but if the NN and NNN results are to be
compared with each other they must be converted to that of a real solid.
When this is done for Xe, the QH MSD for the NN and NNN approximations
are found to differ from each other by about 2%. For the A2 and GF results
this difference amounts to 8% and 7% respectively. For the NN case we have
also compared our PT results, which have been calculated exactly, with PT
results calculated using a frequency-shift approximation. We conclude that this frequency-shift approximation is a poor approximation.
We have calculated the MSD of five alkali metals, five bcc transition
metals and seven fcc transition metals. The model potentials we have used
include the Morse, modified Morse, and Rydberg potentials. In general the
results obtained from the Green's function method are in the best agreement
with experiment. However, this improvement is mostly qualitative and the
values of MSD calculated from the Green's function method are not in much
better agreement with the experimental data than those calculated from the
QH theory.
We have calculated the phonon dispersion curves (PDC's) of Na and Cu,
using the 4 parameter modified Morse potential. In the case of Na, our
results for the PDC's are in poor agreement with experiment. In the case of
eu, the agreement between the tlleory and experiment is much better and
in addition the results for the PDC's calclliated from the GF method are in
better agreement with experiment that those obtained from the QH theory.


title: Phospha-adamantanes as ligands for palladium-catalyzed cross-coupling reactions

subject:
Phosphine.
Palladium catalysts.
Ligands (Biochemistry)
Chemistry, Organic.

abstract:
New and robust methodologies have been designed for palladium-catalyzed crosscoupling
reactions involving·a novel·class oftertiary phosphine ligand incorporating a
phospha-adamantane framework. It has been realized that bulky, electron-rich
phosphines, when used as ligands for palladium, allow for cross-coupling reactions
involving even the less reactive aryl halide substrates with a variety of coupling partners.
In an effort to design new ligands suitable for carrying out cross-coupling
transformations, the secondary phosphine, 1,3,5,7-tetramethyl-2,4,8-trioxa-6phosphaadamantane
was converted into a number of tertiary phosphine derivatives. The
ability of these tertiary phosphaadamantanes to act as effective ligands in the palladiumcatalyzed
Suzuki cross-coupling was examined. 1,3,5,7-Tetramethyl-6-phenyl-2,4,8trioxa-
6-phosphaadamantane (PA-Ph) used in combination with Pdz(dba)3permitted the
reaction of an array of aryl iodides, bromides and chlorides with a variety arylboronic
acids to give biaryls in good to excellent yields. Subsequently, palladium complexes of
PA-Ph were prepared and isolated in high yields as air stable palladium bisphosphine
complexes. Two different kinds of crystals were isolated and upon characterization
revealed two complexes, Pd(PA-Ph)z.dba and Pd(PA-Ph)zOz. Preliminary screening for
their catalytic activity indicated that the former is more reactive than the latter. Pd(PAPh)
z.dba was applied as the catalyst for Sonogashira cross-coupling reactions of aryl
iodides and bromides and in the reactions of aryl bromides and chlorides with ketones to
give a-arylated ketones at mild temperatures in high yields.


title: Physical access for persons with disabilities

subject: People with disabilities--Civil rights--Canada.

subject: People with disabilities--Legal status, laws, etc.

subject: Discrimination against people with disabilities--Canada.

abstract:
For persons with disabilities, the activities that able-bodied people take for granted can
be major, often insurmountable challenges. Attempting to enter a restaurant for lunch
with friends can result in lengthy and adversarial litigation if the facility is not accessible
to a person with a disability or other mobility impairment. This litigation would be
initiated after the individual was effectively refused service; a refusal based on hislher
personal physical characteristics. If a shopping mall is not equipped with "access
amenities", then the disabled person may be excluded from shopping there and thus
exercising consumer freedom. If workplaces are not equipped to accommodate the access
needs of persons with disabilities, then those people are effectively barred from gainful
employment there. If a municipal goveniment building is inaccessible to disabled persons,
then they may be excluded from participating in council meetings. These are all activities
that the majority of the population enjoys as a matter of course, in that they represent the
functions of a free citizen in a free society.
If a person is excluded from such activities because of some personal characteristic, then
that person is subjected to differential or discr~minatory treatment. The guarantees
provided in Canadian feden! and provincial rights legislation, are such that people are not
to be discriminated againsL Where buildings and facilities othen\iise open to the public
are not accessible for persens with disabilities, then those people are being discriminated
against. To challenge these discriminatory practices, individuals initiate
complaints through the administrative justice system.
To address the extent to which this is a problem, many sources were consulted.
Constitutional lawyers, tribunal members, advocates for the disabled and land use planners
were interviewed. Case law and legislation were reviewed. Literature on citizenship
theory, dispute resolution and dispute avoidance was compiled and assessed. And, the
field of land use planning was analyzed (drawing on the WTiter's educational and
experiential background) as a possible alternative method for effecting systemic access for
persons with disabilities.
The conclusion of this study is that there does exist a proactive method for assuring
access, a method that can apply the systemic remedy needed to deal with this problem.
The current method, which is an adversarial and piecemeal complaint process, has proven
ineffective in remedying this discrimination problem~ Failure to provide an appropriate
remedy means that persons with disabilities will not enjoy the degree of citizen status
enjoyed by the able-bodied. This is the current circumstance, and since equity is the aim
of rights legislation, and since such legislative and administrative frameworks have failed
in that purpose, then an alternative method is necessary.
An alternative model is the one in which land use planning is based. It has conflict
avoidance and conflict minimization as underpinnings. And, most importantly, land use
planning is already a proyen method of combatting discrimination.


title: Polytypism and Silicon carbide : a solid state nuclear magnetic resonance study

subject:
Silicon carbide.
Nuclear magnetic resonance.
Silicon carbide--Electric properties.

abstract:
A survey of predominantly industrial silicon carbide has
been carried out using Magic Angle Spinning nuclear magnetic
resonance (MAS nmr); a solid state technique.
Three silicon carbide polytypes were studied; 3C, 6H,
and 15R. The 13C and 29 Si MAS nmr spectra of the bulk SiC sample
was identified on the basis of silicon (carbon) site type in the
d iff ere n t pol Y t Y pes • Out to 5.00 A fro mac en t r a lsi 1 i con (0 r
carbon) atom four types of sites were characterized using
symmetry based calculations. This method of polytype analysis
was also considered, in the prelminary stages, for applications
with other polytypic material; CdBr 2 , CdI 2 , and PbI 2 "
In an attempt to understand the minor components of
silicon carbide, such as its surface, some samples were
hydrofluoric acid washed and heated to extreme temperatures.
Basically, an HF removable species which absorbs at -110 ppm
(Si0 2 ) in the 29 Si MAS nmr spectrum is found in silicon carbide
after heating. Other unidentified peaks observed at short
recycle delays in some 29 Si MAS nmr spectra are considered to be
impurities that may be within the lattice. These components
comprise less than 5% of the observable silicon.
A Tl study was carried out for 29 Si nuclei in a 3C
ii
polytype sample, using the Driven Equilibrium Single-Pulse
Observation of T1 (DESPOT) technique. It appears as though there
are a number of nuclei that have the same chemical shift but
different T1 relaxation times. The T1 values range from 30
seconds to 11 minutes. Caution has to be kept when interpreting
these results because this is the first time that DESPOT has been
used for solid samples and it is not likely in full working
order.
MAS nmr indicates that the 13C and 29 Si ~sotropic chemical
shifts of silicon carbide appear to have a reciprocal type of
relationship_ Single crystal nmr analysis of a 6H sample is
accordance with this finding when only the resultant isotropic
shift is considered. However, single crystal nmr also shows that
the actual response of the silicon and carbon nuclear environment
to the applied magnetic field at various angles is not at all
reciprocal. Such results show that much more single crystal nmr
work is required to determine the actual behavior of the local
magnetic environment of the SiC nuclei.


title: Postglacial variations in aquatic productivity in Found Lake, Ontario

subject: Aquatic biology--Ontario--Found Lake.

subject: Glacial epoch--Ontario--Found Lake.

subject: Biological productivity--Ontario--Found Lake.

subject: Variation (Biology)


title: Preadjunct questions as a learning strategy for older adults

subject:
Adult education--Evaluation.
Adult learning--Evaluation.
Questioning.

abstract:
This study investigated the effectiveness of comprehension level
preadjunct questions as a learning strategy for older adults in a classroom
setting. Fifty-five adults from 55 to 70 years of age were randomly assigned
to two groups, the preadjunct question group and a no-question control
group. They viewed a video on high blood pressure and completed a recall
posttest immediately after viewing the video and again seven days tater.
Results demonstrated that there was no significant difference between
groups. However, the no-question control group obtained a higher mean
score on both the immediate and delayed recall tests than did the
preadjunct question group. Nevertheless, significant differences in posttest
scores were found related to educational levels and prior knowledge about
high blood pressure. Results obtained were explained in terms of resource
theory of cognitive aging.


title: Preparing to teach : learning from an exploration of teachers' experiences of teaching in classrooms of difference

subject:
Critical pedagogy.
Cultural pluralism
Multicultural education.
Effective teaching.

abstract:
This qualitative study explores practicing teachers' experiences of teaching in
classrooms of diversity, that is, classrooms where students represent a variety of
differences including race, culture, ethnicity, and class. More specifically, this study
investigates the types of curricular and pedagogical practices teachers employ in their
classrooms. This study attempts to make a contribution to the scholarship of critical
pedagogy by drawing upon the works of critical pedagogues to make sense of
participants' descriptions oftheir curricular and pedagogical practices.
Four participants were involved in this study. Participants were elementary
teachers in classrooms of difference in Ontario who contributed the primary sources of
data by engaging in 2 individual interviews. Additional sources of data included a focus
group meeting that 2 ofthe participants were able to attend, school board curriculum
resource documents assisting teachers in teaching critically, as well as a research journal
which the researcher kept throughout the study.
The scholarship of critical pedagogy (Ellsworth, 1992; Giroux, 1993; McLaren,
1989) informs the analysis of participants' descriptions of their teaching experiences.
Many of the participants did not engage in a practice of critical pedagogy. This study
explores some of the challenges and possibilities of using critical pedagogy to create
spaces in classrooms where teachers can build connections between the curriculum
mandated by the government and the multiple identities and experiences that students
bring into the classroom. This study concludes with a discussion on what teachers need to
know to be able to begin creating equitable and educational experiences in classrooms of
difference.


title: Pressure dependence of spin fluctuations in metallic glasses Zrâ  â   Niâ  â  ,Zrâ  â  (Nix/Feâ  â  â  -x)â  â   and /Zrx/feâ  â  â  -x

subject:
Metallic glasses.
Fluctuations (Physics)
Pressure--Measurement.
Spin (Aerodynamics)

abstract:
The superconducting transition temperature Tc of metallic glasses
ZrxFelOO-x (x=80, 75), Zr75(NixFelOO-x)25 (x=75, 50, 25), and CU2SZr75
were measured under quasi-hydrostatic pressure up to 8 OPa (80kbar).
The volume (pressure) dependence of the electron-phonon coupling
parameters Aep for CU25Zr75 was calculated using the McMillan equatio11.
Using this volume dependence of Aep and the modified McMillan equation
which incorporates spin-fluctuations, the volume dependence of the spin
fluctuation parameter, Asf, was determined in Zr75Ni25, ZrxFelOO-x , a11d
Zr75(NixFelOO-x)25. It was found that with increasing pressure, spinfluctuations
are suppressed at a faster rate in ZrxFe lOO-x and
Zr75(NixFelOO-x)25, as Fe concentration is increased. The rate of
suppression of spin-fluctuations with pressure was also found to be higher in
Fe-Zr glasses than in Ni-Zr glasses of similar composition.


title: Primary structure and expression studies of the dihydrofolate reductase gene (DFRI) of Saccharomyces cerevisiae

subject:
Saccharomyces cerevisiae.
Yeast.
Plasmids.
Escherichia coli.

abstract:
The nucleotide sequence of a genomic DNA fragment thought
previously to contain the dihydrofolate reductase gene (DFR1)
of Saccharomyces cerevisiae by genetic criteria was
determined. This DNA fragment of 1784' basepairs contains a large
open reading frame from position 800 to 1432, which encodes a
enzyme with a predicted molecular weight of 24,229.8 Daltons.
Analysis of the amino acid sequence of this protein revealed that
the yeast polypep·tide contained 211 amino acids, compared to the
186 residues commonly found in the polypeptides of other
eukaryotes. The difference in size of the gene product can be
attributed mainly to an insert in the yeast gene. Within this
region, several consensus sequences required for processing of
yeast nuclear and class II mitochondrial introns were identified,
but appear not sufficient for the RNA splicing. The primary
structure of the yeast DHFR protein has considerable sequence
homology with analogous polypeptides from other organisms,
especially in the consensus residues involved in cofactor and/or
inhibitor binding. Analysis of the nucleotide sequence also
revealed the presence of a number of canonical sequences
identified in yeast as having some function in the regulation of
gene expression. These include UAS elements (TGACTC) required for
tIle amino acid general control response, and "TATA H boxes as well
as several consensus sequences thought to be required for
transcriptional termination and polyadenylation. Analysis of the
codon usage of the yeast DFRl coding region revealed a codon
bias index of 0.0083. this valve very close to zero suggestes
3
that the gene is expressed at a relatively low level under normal
physiological conditions.
The information concerning the organization of the DFRl
were used to construct a variety of fusions of its 5' regulatory
region with the coding region of the lacZ gene of E. coli.
Some of such fused genes encoded a fusion product that expressed
in E.coli and/or in yeast under the control of the 5'
regulatory elements of the DFR1. Further studies with these
fusion constructions revealed that the beta-galactosidase
activity encoded on multicopy plasmids was stimulated transiently
by prior exposure of yeast host cells to UV light. This suggests
that the yeast PFRl gene is indu.ced by UV light and nlay in1ply a
novel function of DHFR protein in the cellular responses to DNA
damage.
Another novel f~ature of yeast DHFR was revealed during
preliminary studies of a diploid strain containing a heterozygous
DFRl null allele. The strain was constructed by insertion of a
URA3 gene within the coding region of DFR1. Sporulation of
this diploid revealed that meiotic products segregated 2:0 for
uracil prototrophy when spore clones were germinated on medium
supplemented with 5-formyltetrahydrofolate (folinic acid). This
finding suggests that, in addition to its catalytic activity, the
DFRl gene product nlay play some role in the anabolisln of
folinic acid. Alternatively, this result may indicate that Ura+
haploid segregants were inviable and suggest that the enzyme has
an essential cellular function in this species.


title: Probing cell surfaces of host and nonhost species of a mycoparasite, using FITC-labeled lectins

subject:
Host-parasite relationships.
Cell membranes.
Piptocephalis virginiana.
Lectins.
Parasites.

abstract:
Cell surfaces of susceptible host species (Mortierella pusllla and
Cboanepilora cucurbitarum ), resistant host (Pilascolomyces articulosus ),
nonhost (Mortierella candelabrum ) and the mycoparasite (Piptocepilalis
virginiana) were examined for sugar distribution patterns using light and
fluorescent microscopy techniques. The susceptible host, resistant host and
the mycoparasite species exhibited a similar sugar distribution profile; they
all showed N-acetyl glucosamine and D-glucose on their cell wall surfaces.
The nonhost cell wall surface showed a positive binding reaction to FITClectins
specific for N-acetyl glucosamine and also for OI.-fucose, N-acetyl
galactosamine and galactose. Treatment of these fungi with mild
concentrations of proteinases (both commercial as well as the mycoparasiteproteinase)
resulted in the revelation of additional sugars on the fungal cell
walls. The susceptible host treated with proteinase expressed higher levels
of N-acetyl glucosamine and D-glucose. The susceptible host also showed the
presence of OI.-fucose, N-acetyl galactosamine and galactose. The proteinasetreated
susceptible host cell walls also showed an increase in the levels of
attachment with the mycoparasite. Treatment of the resistant host with
proteinases revealed OI.-fucose in addition to N-acetyl glucosamine and
D-glucose. Treatment of the nonhost cell wall with proteinase resulted in the
exposure of low levels of D-glucose, in addition to sugars found on the
untreated nonhost cell wall surface. The mycoparasite treated with
proteinase revealed OI.-fucose, N-acetyl galactosamine and galactose on its cell
surface in addition to the sugars N-acetyl glucosamine and D-glucose.
Protoplasts were isolated from hosts and nonhost fungi and their
surfaces were examined for sugar distribution patterns. The susceptible host
and nonhost protoplast membranes showed all the sugars (N-acetyl
glucosamine, D-glucose, (It.-fucose, N-acetyl galactosamine and galactose)
tested for. The resistant host protoplast membrane however, had only
N-acetyl glucosamine and D-glucose exposed. This sugar distribution profile
resembles that exhibited by the untreated resistant host cell wall, as well as
that shown by the untreated mycoparasite cell surface. Only susceptible host
protoplasts were successful in attaching to the mycoparasite surface.
Resistant host protoplasts did not show any interaction with the
i
mycoparasite cell surface. Both susceptible as well as resistant host
protoplasts were incapable of attaching to agarose beads surface-coated with
specific carbohydrates. The mycoparasite however, did attach to agarose
beads surface-coated with either N-acetyl glucosamine, D-glucose/Dmannose
or o:,- methyl-D-mannose. The relevance of the cell wall and the
protoplast membrane in the light of the present results, in reacting
appropriately to bring about either a susceptible, a resistant or a nonhost
response has been discussed.


title: Project Business: a quasi-experimental study of co- operative interaction between schools and industry

subject: Business and education--Ontario--Niagara (Regional

subject: Business and education--Ontario--St. Catharines.

subject: Education, Cooperative--Ontario--Niagara (Regional

subject: Education, Cooperative--Ontario--St. Catharines.

subject: Business education--Ontario--Niagara (Regional

subject: Business education--Ontario--St. Catharines.

abstract:
This project is a quasi-experimental study involving eight classrooms
in two senior elementary schools in St. Catharines, Ontario which
received a Project Business Program and were pre- and post-tested to
determine the growth of knowledge acquisition in the area of business
concepts. Four classrooms received a Project Business treatment while
four classrooms acted as a control. The Project Business Program is
sponsored by Junior Achievement of Canada; it occurred during a twelveweek
period, February to May 1981, and is run by business consultants
who, through Action, Dialogue and Career Exploration, teach children
about economics and business related topics. The consultants were
matched with teacher co-ordinators in whose classrooms they taught and
with whom they discussed field trips, students, lesson planning, etc.
The statistical analysis of pre- and post-test means revealed a
significant statistical growth in the area of knowledge acquisition on
the part of those students who received the Project Business Program.
This confirms that Project Business makes a difference.
A search of the literature appears to advocate economic programs
like Project Business, whfch are broadly based, relevant and processoriented.
This program recommends itself as a model for other areas of
co-operative curricular interactions and as a bridge to future trends
and as a result several fruitful areas of research are suggested.


title: Proton translocation by cytochrome c oxidase reconstituted into proteoliposomes

subject:
Protons.
Cytochrome c.
Cytochrome oxidase.
Liposomes.
Protease inhibitors.

abstract:
Cytochrome c oxidase .inserted into proteoliposomes
translocates protons with a stoichiometry of approx-,
imately 0.4-0.6 H+/e- in the presence of valinomycin
plus pottasium. The existance .ofsuchproton translocation
is .supportedby experiments with lauryl maltoside
which abolished the pulses but~~d not inhibit cyt.
c binding .or oxidase turnover. Pulses with K3FeCN6 did
not induce acidification further supporting vectorial
proton transport by cyt ..aa3 . Upon lowering the ionic
strength and pulsing with ferrocytochrome c, H+/eratios
increased. This increase is attributed to scaler
proton release consequent upon cyt.c-phospholipid binding.
Oxygen pulses at low ionic strength however did not exhibit
this large scaler increase in H+/e- ratios.A-small increase
was observed upon .02 pul'sing at·low ionic strengt.h. This
increase was KeN and, ,pcep sensitive and thus possibly due
to a redox linked scaler deprotonation. Increases in the
H+/e- ratio also occurred ifp~lses ,were performed in the
presence of nonactin rather.than valinomycin.
The fluorescent pH indicator pyranine was internally
trapped inaa3 conta~ning "proteoliposomes. Internal alkalinization,
as mon,itored by pyranine fluorescence leads
to a of approx.imately 0.35 units, which is proportional
to electron flux. This internal alkalinization was also
DCCD sensitive, being inhibited by approximately 50%. This
50% inhibition of internal alkalinization supports the existance of vectorial proton transport.


title: Quantum Monte Carlo : some theoretical and numerical studies

subject:
Quantum chemistry.
Monte Carlo method.

abstract:
In Part I, theoretical derivations for Variational Monte Carlo
calculations are compared with results from a numerical calculation of
He; both indicate that minimization of the ratio estimate of Evar , denoted
EMC
' provides different optimal variational parameters than does
minimization of the variance of E
MC
• Similar derivations for Diffusion
Monte Carlo calculations provide a theoretical justification for empirical
observations made by other workers.
In Part II, Importance sampling in prolate spheroidal coordinates
allows Monte Carlo calculations to be made of E for the vdW molecule
var
He2' using a simplifying partitioning of the Hamiltonian and both an
HF-SCF and an explicitly correlated wavefunction. Improvements are
suggested which would permit the extension of the computational precision
to the point where an estimate of the interaction energy could be made~


title: Radiation-induced changes in the export of photoassimilated carbon /|nBarry Jess Shelp. -- 260 0 St. Catharines, [Ont. : s. n.],

subject:
Plants--Effect of radiation on.
Carbon.
Soybean.

abstract:
Low levels of ionizing radiation induce two
translocation responses in soybean: a reduction in
photoassimilate export from leaves and a change in the
distribution pattern of exported photoassimilate within
the plant. In this investigation these responses have
been further studied specifically to ascertain the site
of radiation damage and to better understand the
physiological responses observed.
Experimentally the primary data was obtained from
studies in which a mature trifoliate leaf of a young soybean
plant (Glycine ~ L. cultivar Harosoy '63) is
isolated in a closed transparent chamber and allowed to
photoassimilate 14C02 for 15 minutes. This is followed
by an additional 45 ~_il'1;ute period before the plant is
sectl.o ne d an d 14 C-ra dl' oactl.v.l ty d eterml. ne d'l n a 11 parts.
Such 14c data provides one with the magnitude and distribution
pattern of translocation. Further analyses were
conducted to determine the relative levels of the major
photosynthetic products using the techniques of paper
chromatography and autoradiography. Since differences between control and irradiated
P 1 ants were not 0 b serve d l' n t h e par tl't"lo nlng 0 f 14 C
between the 80% ethanol-soluble and -insoluble fractions
14 or in the relative amounts of C-products of photosynthesis,
the reduction in export in irradiated plants
is not likely due to reduced availability of translocatable
materials.
Data presented in this thesis shows that photoassimilate
export was not affected by gamma radiation
until a threshold dose between 2.0 and 3.0 krads was
reached. It was also observed that radiation-induced
damage to the export process was capable of recovery in
a period of 1 to 2 hours provided high light intensity
was supplied.
In contrast, the distribution pattern was shown
to be extremely radiosensitive with a low threshold dose
between .25 and .49 krads. Although this process was also
capable of recovery,lt" occurred much earlier and was
followed by a secondary effect which lasted at least for
the duration of the experiments.
The data presented in this thesis is interpreted
to suggest that the sites of radiation action for the two
translocation responses are different. In regards to
photoassimilate export, the site of action of ionizing
radiation is the leaf, quite possibly the process of photophosphorylation which may provide energy directly
for phloem loading and for membrane integrity of the
phloem tissue* In regards to the pattern of distribution
of exported photoassimilate, the site is likely the apical
sink, possibly the result of changes of levels of endogenous
hormones. By the selection of radiation exposure dose and
time post-irradiation, it is possible to affect independently
these two processes suggesting that each may be
regulated independent of the other and involves a distinct
site.


title: Rapid [Gamma]-amino acid synthesis and the inhibition of the growth and development of oblique banded leaf-roller larvae

subject:
GABA.
Leafrollers--Larvae--Growth.
Soybean--Disease and pest resistance.

abstract:
The hypothesis that rapid y-aminobutyric acid (GABA) accumulation is
a plant defense against phytophagous insects was investigated. Simulation
of mechanical damage resulting from phytophagous insect activity
increased soybean (Glycine max L.) leaf GABA 10- to 25-fold within 1 to 4
min. Pulverizing leaf tissue resulted in a value of 2. 15 (±O. 11 SE) ~mol
GABA per gram fresh weight. Increasing the GABA levels in a synthetic
diet from 1.6 to 2.6 Jlffiol GABA per gram fresh weight reduced the growth
rates, developmental rates, total biomass (50% reduction), and survival
rates (30% reduction) of cultured Oblique banded leaf-roller (OBLR)
(Choristonellra rosacealla Harris) larvae. In field experiments OBLR
larvae were found predominantly on young terminal leaves which have a
reduced capacity to produce GABA in response to mechanical damage.
Glutamate decarboxylase (GAD) is a cytosolic enzyme which catalyses the
decarboxylation of L-Glu to GABA. GAD is a calmodulin binding enzyme
whose activity is stimulated dramatically by increased cytosolic H+ or Ca2
+
ion concentrations. Phytophagous insect activity will disrupt the cellular
compartmentation of H+ and Ca2
+, activate GAD and subsequent GABA
accumulation. In animals GABA is a major inhibitory neurotransmitter.
The possible mechanisms resulting in GABA inhibited growth and
development of insects are discussed.


title: Reactions of polyhalogenated aromatic compounds and related ethers with metal/ammonia solutions

subject:
Aromatic compounds--Reactivity.
Ethers.
Metal ammonia solutions.
Halogenation.

abstract:
This work contains the results of a series of reduction studies
on polyhalogenated aromatic compounds and related ethers using alkali
metals in liquid ammonia.
In general, polychlorobenzenes were reduced to t he parent aromatic
hydrocarbon or to 1 ,4-cyc1ohexadiene, and dipheny1ethers were cleaved to
the aroma tic hydrocarbon and a phenol. Chlorinated dipheny1ethers were
r eductive1y dechlorinated in the process. For example, 4-chlorodipheny1-
ether gave benzene and phenol.
Pentach1orobenzene and certain tetrachlorobenzenes disproportionated
to a fair degree during the reduction process if no added proton source
was present. The disproportionation was attributed to a build-up of
amide ion. Addition of ethanol completely suppressed the formation of
any disproportionation products.
In the reductions of certain dipheny1ethers , the reduction of one
or both of the dipheny1ether rings occurred, along with the normal
cleavage. This was more prevalent when lithium was the metal used .
As a Sidelight, certain chloropheno1s were readily dechlorinated.
In light of these results, the reductive detoxification of the
chlorinated dibenzo-1,4-dioxins seems possible with alkali metals in
l iquid ammonia.


title: Reactions of some non-enolisable chloroketones with amide ion and a new synthesis of acridones /|nGuo-shyoung John Chen. -- 260 St. Catharines, Ont. : [s. n.],

subject: Amides. Ketones. Acridones.

abstract:
This research was directed mainly towards the investigation
of the reacti.ons of· substituted chlorobenziophenones under strongly
basi,c conditions. The work 'can be divided into two main sections.
The Introduction deals mainly with historical studies on
aryne chemistry and the Haller-Bauer reaction.
Secti.on I i.s concerned with syntheses of 2-benzamido-2'chlorobenzophenone
and 2-benzamido~3'-chlorobenzophenone,and with
thei,r respective reactions wi.th potassium amide in ammonia.
o-Chlorophenylacetic acid was converted to the acid chloride and then
by Friedel-Craftsreaction with benzene to w-(o-chlorophenyl)acetophenone.
Reaction wi.th phenylhydrazine and Fischer cyclization gave 3- (0chlorophenyl)-
2-phenylindole, which was ozonized to 2-benzamido-2'chlorobenzophenone.
The isomeric 3' -chlor,..o ke: tone was similarly
synthesised from m-chlorophenylacetic acid. Both the 2'- and
3' -ch.loroketones gave N-benzoylacridone on treatment with potassium
amide in ammonia; an aryne mechanism is involved for the 3'-chloroketone
but aryne and nucleophilic substitution mechanisms are possible for
the 2'-chloroketone.
Hydrolysis of the 2'- and 3'-chloroketones gave 2-amino-2'chlorobenzophenone
and 2-amino-3'-chlorobenzophenone respectively. A
second new acridone synthesis is given in the Appendix involving reactions
of these two ketones with potassium t-butoxide in t-butylbenzene.
i
Section 2 deals with the investigation of the reaction of
some tricyclic ch1orobenzophenones with potassium amide in liquid
ammonia. These were 1-ch1orof1uorenone; which was pr~pared in several
steps from f1uoranthene, and 1- and 2-ch1oroanthraquinones. 1-Ch1orof1uorenone
gave 1-aminof1uorenone ; 1-ch1oroanthraquinone gave 1- and
2-aminoanthraquinones; 2-ch1oroanthraquinone was largely recovered
from the attempted reaction.


title: Red blood cells of the common goldfish carassins auratus: variations in cytomorphology and relative abundance of membrane proteins due to age and differing environmental conditions

subject:
Goldfish--Physiology.
Goldfish.
Erythrocytes.
Membrane proteins.


title: Reduced local energy calculations on XÂ¹Sigmaâ ½gHâ   and 1Â¹S He /|nGerald F. Thomas. -- 260 St. Catharines [Ont.] : Dept. of Chemistry, Brock University,

subject:
Wave functions.
Electrons.
Energy-band theory of solids.

abstract:
The one-electron reduced local energy function, t ~ , is
introduced and has the property < tL)=(~>. It is suggested that the
accuracy of SL reflects the local accuracy of an approximate wavefunction.
We establish that <~~>~ <~2,> and present a bound formula, E~ ,
which is such that
where Ew is Weinstein's lower bound formula to the ground state. The
nature of the bound is not guaranteed but for sufficiently accurate
wavefunctions it will yield a lower bound.
,-+ 1'S I I Applications to X LW Hz. and ne are presented.