McGill University Thèses et mémoires publiés en 1964

Although the presence of phosphorus in phosphoproteins, phospholipids and nucleic acids has long been known, one of the significant advances in biochemistry in the past few decades has been the increasing realization of its central role in the metabolism of living organisms. In particular, it is now recognized that its function in the stepwise degradation reaction through which energy is harnessed and integrated with the synthetic processes, is essential for the maintenance of life.  Lire la suite

A dynamometer for the accurate, automatic determination of induction motor torque-speed characteristics has been developed as part of an investigation into induction motor losses. The speed range of interest is scanned at constant acceleration so as to simplify corrections for inertia torque, the speed being measured by a highly accurate tachogenerator. The torque is measured by a magnetostrictive torque meter mounted between the dynamometer and the machine under test, the linearity and reproducibility being better than ±0.5% of the rated torque. A 12 KW 3-phase power unit, which may be operated in either the constant voltage or constant current mode, …  Lire la suite

By the beginning of the century, it had been conclusively established that the most efficient utilization of any ration depended not only on the proper balance between the heretofore known essential nutrients, viz.: proteins, fats and carbohydrates, but on a consideration of balance with regard to minerals and vitamins. Analyses of the animal body and of eggs reveal the presence of a large number of mineral elements. However only a few of these have to be added to the normal ration either because some are not essential in the performance of the physiological activities of the animal or the ingredients …  Lire la suite

This thesis is presented in two parts. In the first part, an attempt has been made to evaluate the possibility of application of gas sampling probes for kinetic and mixing studies of reacting, high velocity, high temperature gas streams. A water cooled, constant area type of probe has been proposed and its internet aerodynamics have been analysed theoretically on the basis of a one dimensional model considering both frictional and heat transfer effects. Quenching rates of the sampled gas have been obtained considering free stream Mach numbers 4, 3 and 2. From the quenching rates, quenching efficiencies of the probe …  Lire la suite

It is recognised that oestrogen action plays a central role in the physiology and biochemistry of avian reproduction. Exogenous oestrogen has been shown to bring about striking changes in immature pullets, both in the morphology of the secondary sex organs, particularly the oviduct, and in the composition of blood and other tissues; the more obvious changes taking place in the latter include the involvement of the bony skeleton in the metabolism and transport of the materials of the egg yolk and egg shell and the production of yolk material by the liver. These matters have been the subject of reviews …  Lire la suite

The aim of this thesis is to apply the concept of ‘image’ to an understanding of Nigeria’s foreign policy. Professor Boulding has defined the image as "the total cognitive, affective and evaluative structure of the behaviour unit, or its internal view of itself and its universe". This image is subjective by nature. Its coincidence with "objective reality" adds nothing to its value for purposes of analysis. The image of a behaviour unit like the nation-state is really a complex of the images of the individuals who compromise the nation.  Lire la suite

There is evidence to suggest that the formation of the permanent changes that constitute memory continues in the nervous system long after the period of learning has ended. Following the learning--the period of acquisition--there remains in the brain some activity that makes retention possible. The persisting activity, which is relatively easy to disturb or disrupt, serves as a template for some more stable biochemical or synaptic change. It has been thought to consist of a reverberatory activity in closed neural circuits: a reasonable but not a necessary idea, though it seems probable that it is at least part of the …  Lire la suite

Intellect is the great binder of mind with itself and of minds with one another. In art it is intellect, implicit or explicit, that raises the work from fineness or virtuosity to what posterity calls depth or greatness. In society it is the conversions of intellect that permit debate instead of battle; reciprocity instead of childish self will and tradition instead of perpetual recommendation.l The thoughts expressed above, besides telling about the aim of the pursuit of excellence, draw our attention to how much needs to be done. Progress has been slow, though now one sees changes come with dramatic …  Lire la suite

The microscopic structure of the small intestine of the rat follows the structural plan of that in other mammals. It has four main layers: serosa, muscular layer, submucosa and mucosa. The main components of the mucosa are the crypts of Lieberkuhn embedded in lamina propria and the finger-like projections, the villi with a lamina propria core and with a single covering layer of epithelial cells. The cells of the crypts of Lieberkuhn ('crypt epithelium') and the cells covering the villi ('villus epithelium') are of common embryological origin and of similar morphological characteristics, thus together they are called the intestinal epithelium …  Lire la suite

Pure metals and many common alloys are made up of grains, similar in composition and crystal structure but not in shape. Each grain is a single crystal representing a phase and these materials are known as single-phase metals. The term "microstructure" in this case means simply a description of the sizes and shapes of the grains; there is nothing else that is accessible to visual or microscopic observation. The microstructure of a two-phase alloy is more complicated since the grains of the two phases differ in composition, structure and shape. In addition, the second phase may be present as a …  Lire la suite

A transistorized, neutron time-of-flight spectrometer has been designed and built for measurement of the energy of neutrons generated with the aid of the McGill cyclotron. Circuitry of the type used in fast coincidence measurements has been used, with avalanche transistors as fast discriminators and limiters. The intrinsic electronic resolution is considerably better than one nanosecond. The spectrometer was used to examine the radio frequency structure of proton pulses generated by the cyclotron. This was found to vary greatly with operating conditions and to depend greatly on the stability of the radio frequency oscillator. The short-term width at half height was …  Lire la suite

A combustion driven hypersonic shock tunnel has been designed and constructed primarily for the simulation of flows around hypersonic ramjets. This report describes the design and construction of the shock tunnel and discusses its hypersonic simulation capabilities. The construction of the shock tunnel has now been completed and it is ready for instrumentation and calibration. The driving gas is a combustible mixture of stoichiometric hydrogen and oxygen diluted with 60 to 75% helium to avoid detonation. The maximum mixture loading pressure is 2000 psi. The driven gas is air, usually at room temperature and pressure. Successful evacuation of the test …  Lire la suite

This thesis presents an analysis of pioneer settlement and subsequent rural depopulation and land abandonment during the post 200 years in an unrewarding area of northern New England. Orange County was first settled in 1762; population reached its maximum in 1840 and then declined steadily until the 1930’s (see Figure 1). This county, encompassing seventeen towns in east central Vermont, was selected as an example of a small area with economic problems representative of the problems of rural northern New England (the states of Vermont, New Hampshire, and Maine). The county unit, as the only source of adequate and continuous …  Lire la suite

In this thesis, comparisons will be made among groups of monolinguals and bilinguals in an attempt to examine the proposition that experience with two languages during childhood is related in a meaningful way to later intellectual functioning. In the past, the major concern of those studying this problem was with discovering whether bilingualism has any detrimental effect on intelligence as measured by standard intelligence tests. The research literature on the relation of bilingualism to intelligence is reviewed in the author’s M.A. thesis (Peal, 1961; see also Peal and Lambert, 1962) where it was concluded that: In view of the weaknesses …  Lire la suite

Collections of snails were made during spring, summer and fall of 1963 along the Ottawa River in the vicinity of Ste. Anne de Bellevue, near Montreal, Quebec. This area is inhabited by muskrats and frequented by many migratory birds. The river contains an abundance of fish and frogs, making it an ideal place for this study. One species of snail, Lymnaea catascopium pallida (Adams) is abundant in this area and harbours many species of larval trematodes. An intensive investigation of this species of snail revealed that only cercariae belonging to the following genera: Cotylurus flabelliformis (Faust, 1917) Van Haitsma, 1931, …  Lire la suite

Production of food and continuous supply thereof is perhaps the most critical factor in sustaining the growth, economy and security of a nation. This point is brought into the foreground most strikingly during periods of war, particularly when rationing has to be imposed. During and since the Second World War, pressure on agriculture in general and on animal industry in particular has mounted continuously to produce more and better meat, milk and eggs, and at less cost to the consumer, to keep in step with the rapidly growing population. With the prices of basic livestock feeds and protein supplements remaining …  Lire la suite

Canada, enmeshed in the 'China tangle' since 1949, has made only a few, haphazard attempts to cut through the web. The web itself has been spun out of material of almost bewildering complexity: the diplomatic problem of recognition of a Communist government, and in this case, one which replaced a régime friendly to the 'West'; concomitant to recognition, the questions of Chinese admission to the United Nations, a body, incidentally, which has branded the Peking government an aggressor, as well as the future of the former government of China - now in exile on Formosa - and in fact, the …  Lire la suite

The balance wind equation is derived, analysed and programmed for application in atmospheric models, and is compared and contrasted with other wind approximations. The mathematical concept of ellipticity of the equation is related to physical characteristics of the atmosphere. A review of three different numerical methods of solution is made; after simplification, one of these is adopted. The solution is performed on the Control Data G-20 computer located at the Central Analysis Office at Montreal Airport. The computations are carried out on a 1709 point octogonal grid covering the northern hemisphere from the Pole to 15°N latitude. The two 500 …  Lire la suite

The above passage is indicative of the pervasive nature of trade. The importance of trade was recognized, not only by Mercantilist writers who gave it first place in economic development, but even the Physiocrats who relegated it to a subordinate position bad to pay attention to the fact that through trade a country must obtain the goods it cannot produce within its boundaries. Adam Smith also who gave priority to agriculture, stating that capital should first be used in agriculture and the excess invested in trade, paid attention to the benefits that can be derived from international trade. Smith was …  Lire la suite

Procaine was first synthesized by Einhorn in 1905. Xylocaine (Lidocaine) was synthesized by Löfgren in 1948. Wiedling, Löfgren and Tegner reported on Propitocaine (Citanest) in 1960. They have been used mainly for local and regional anesthesia in surgery and dentistry. The first review of the use of local anesthetics by the intravenous route was reported by Graubard and Peterson in 1950. Gilbert et al (1951) reported similar results using intravenous Xylocaine. In their cases they reported effective analgesia when the Xylocaine was used in cases of advanced cancer. They reported that the danger of side-effects appeared to be less than …  Lire la suite

Let (En) x1’(t) = f1(t,x1(t),…,xn(t),x1(t-w),…,xn(t-w)) (i=1,…,n), w>0, be a system of n difference-differential equations of the first order on some domain D of (t,x1,…xn,y1,…,yn) space. Our aim is to establish certain conditions which will ensure that the maximum and minimum solutions of the equations (En) passing through certain strips will exist in the extended sense. The majority of the work to appear in this thesis is a generalization or results from the theory or ordinary differential equations.  Lire la suite

Housing is one of the most important basic necessities of human life next to food. The activity in housing does not meet the demands of increasing populations, with the result that today every country is facing a serious housing problem particularly in urban areas. It is an actual fact that the need for housing, particularly of people of low income in urban areas such as Bangkok, has reached a high level. The significance of this can be seen from the steady growth of housing projects, but most of them are not perfectly suited to satisfy the needs of the people …  Lire la suite

The peninsule of Labrador-Ungava* (Map 1) is a population desert, having harsh, cold winters and brief, warrn, fly-cursed summers, but offering the glacial geomorphologist ample scope for working on virgin territory, with abundant landforrns often of textbook simplicity. However, it is only in recent years thot extensive aerial photography has been undertaken, and this, together wlth certain military and economie developments within the peninsule, has led to an increasing awareness of the significance of the glacial history of the a rea. These developments led ultimately to the establishment in 1954, of the McGi Il Sub-Arctic Research La bora tory, through …  Lire la suite

A technique is devised for corona-pulse intensity calibration of the corona detection circuit employed in the experiments; this calibration scheme may be regarded as a modification of one of the three suggested ASTM calibration methods. The remaining two methods are found to have serious inherent disadvantages and are discarded oh those accounts. A method, developed for the measurement of the corona discharge rate, is extensively used to analyze the sequence of discharge behaviour within spark gaps of various spacings and under different vapour pressures. The discharge rate measurements, in conjunction with toe observations on the voltage waveforms across discharging gaps, …  Lire la suite

Depuis 1940, la réputation littéraire de Paul Morand a subi une sérieuse éclipse. La politique en est en partie responsable, mais l'évolution des valeurs intellectuelles y est aussi pour beaucoup. Morand s'était identifié à une époque, celle de la génération de 1930. Elle lui avait reconnu un grand talent et l'avait placé presque au même niveau littéraire que Marcel Proust et André Gide. Nos aînés semblent avoir commis une monumentale erreur d'appréciation. Ils ont pris du strass pour du diamant, et se sont laissés éblouir par le "modernisme" de Morand. Cosmopolitisme, ésotérisme, snobisme, joints à une authentique élégance d'attitude, à …  Lire la suite

Stress corrosion cracking in its simplest terms is metal failure resulting, over a period of time from the conjoint action of stress and corrosion. In reality, the problem is more involved than this definition might suggest for the reason that the two operating factors, namely, stress and corrosion do not act in a simple additive way. Stress corrosion cracking is not a mere case of metal corrosion in the presence of stress. Although it is true that corrosive attack is part of the mechanism, the extent or severity of corrosion is not a guiding criterion for susceptibility to cracking. Many …  Lire la suite

In recent years a number of studies have revealed the existence of biochemical differences between the body fluids of schizophrenic patients and the body fluids of normal human subjects. In particular, differences have been reported in both urine constituents and blood constituents; and in blood constituents, not only in the plasma fraction, but also in the formed elements (or cells) fraction. While the nature of the association between such biochemical anomalies and the behavioral anomalies of schizophrenic patients remains to be investigated, evidence is accumulating that a factor, or factors in the blood substances of schizophrenic patients can disrupt the …  Lire la suite

The project investigates aspects of professional social work which derive from its association with bureaucratic organizations. This enquiry is based upon sociological evidence that the combination of professional and bureaucratic modes of occupational life contains mutually dysfunctional aspects. The published work by Blau and Scott, Formal Organizations, is the point of departure for the study. The data are the perceptions of social workers as obtained by a slightly modified 85 item questionnaire developed by W.R. Scott in his work on a Doctoral dissertation in Sociology at the University of Chicago. The questionnaire was distributed to 12 social work settings in …  Lire la suite

In 1901 Baron Roland von Eötvös used gravimetric measurements to obtain the elevation contours of a lake bottom and thus established on an experimental basis, the value of this technique for indicating and mapping near-surface density variations in the earth's crust. Since then, the gravity method has been extensively used for outlining various geological structures. A series of typical applications of this method is discussed by Heiland (1940, p. 157) Because of the relatively high density contrast between rock and ice, gravimetric measurements have been used recently for determining subglacial elevation contours. This application of gravity measurements possibly originated with …  Lire la suite

The idea of the control of the sex ratio is not a recent one. According to Gordon (1958), men have been attempting to control or predict the sex of their offspring for thousands of years. This subject was discussed in a Chinese Manuscript about 4,400 years ago. An Egyptian papyrus of 2,200 B.C. noted that a pregnant woman with the use of greenish cast was certain to bear a son. Aristotle believed that the placing of the marriage bed in a north-south direction favored the conception of boys. These are examples of the many beliefs that have been reported regarding …  Lire la suite

Introductory statement - Prospecting for ore minerals is often carried on by examining the bedrock at or very near the earth’s surface. The bedrock, however, over large areas of the earth, is covered by layers of material called overburden. It has been demonstrated that under certain conditions the bedrock can be examined indirectly by chemical analyses of the soils or plants covering it. Canada, particularly in the north, has large areas covered by deposits in the form of peat bogs or muskegs. The examination of bedrock under peat bogs or muskegs by chemical analyses has not been practised in Canada, …  Lire la suite

In the living animal, brain often swells greatly following trauma. There are two types of brain swelling: 1. One occurs very rapidly and is probably due to a dilatation of blood vessels or an increase in the cerebrospinal fluid volume or both. This is what Elliott and Jasper have referred to as 'inflation' (Elliott and Jasper, 1949). 2. The other is more chronic and is brought about by an increase in the water content of the cerebral tissues. Many experimental studies of cerebral edema have been published yet little is known about the basic mechanisms responsible for its production. At …  Lire la suite

In the course of preliminary studies aiming at defining the site of action of angiotensin, we have confirmed that infusion of this peptide, in large doses to rats, was producing a marked diuresis. Since this phenomenon was reproducible, we became interested in the compositionof the urine excreted under these conditions. [...]  Lire la suite

In this thesis, we study rational extensions of monoids with a zero element. This is essentially a generalisation of the corresponding theory for rings as developed in (7) and (6). (See bibliography at the end). For various reasons, we have decided to consider monoids with a zero element, henceforth called monoids, but most of the results can easily be generalised to general monoids. In the first chapter, we first introduce the notion of an M-set, which is essentially a representation of a monoid, and these M-sets play the same role as R-modules for rings. Then, through the rest of the …  Lire la suite

The existence of a water-insoluble precursor or pectin has been known since 1848 when Fremy reported the occurrence or a "pectose” (1). This material was insoluble in water and even in cold concentrated hydrochloric acid but was transformed by heating in dilute acid solutions into a water-soluble pectin similar in properties to the pectin which bad been discovered in plant juices. Pectin has now been isolated from many sources, although its chemistry is not yet completely known. In addition to the well-know use of pectin as food and tor various industrial purposes, pectin is now rapidly finding more use in …  Lire la suite

Recent electrophysiological studies of visual mechanisms in frogs have demonstrated that a high degree of selection of specific information occurs right at the retinal level (Barlow, 1953a and 1953b; Lettvin et al., 1959; Maturans et al., 1960). This research has important theoretical implications for the behavioral sciences, but there have been few systematic laboratory studies of the effects of specific visual stimuli on amphibian behavior. It has long been assumed that the retina transduces visual information into nerve impulse patterns, and that a faithful replica of the visual world is transmitted to the brain, where all information processing is believed …  Lire la suite

As an earth-bound being man is confronted by two landscapes; the natural and the man-made, and both are of interest to him as an intellectual creature. While both landscapes may cause feelings of awe, or peace, or in some cases apprehension, the emotion aroused by the sight of a man-made landscape is imbued with a deeper feeling of identification which flows from the recognition of the work of fellow creatures. A sign of man in an otherwise empty landscape can change an l-It attitude to an I-Thou attitude, even though the sign may be no more than a vehicle track …  Lire la suite

One of the most striking characteristics of postwar economic thinking is the concern with economic growth. The reconstruction of Western Europe was but one example of the generalized interest in economic growth, although the one with which the world leadership was more directly concerned. In the far larger proportion of the world community generally known as "underdeveloped," the need to grow assumed undreamed-of strength. Many factors contributed to the upsurge of this "growth consciousness" in the underdeveloped areas: (1) Population "explosion." The spread of modern techniques of health and sanitation in the backward regions of the world brought about astounding …  Lire la suite

During the past few years, the function of the thymus gland has been greatly clarified. It is now known to play an important role in the development of immunological competence. However, less is known about that role, if any, the thymus plays in the maintenance of immune function during adult life. Because of the bearing of immune function on tissue transplantation and because of the possible role of the thymus in immune function, this gland may be of importance in a better understanding of organ and tissue rejection. Similarly, modification or removal of the thymus, with or without other treatment, …  Lire la suite

The discipline of urban geography as a specialized and integral part of geography has shown strong development only since the end of World Uar II. Very few articles published in this field antedate this period, but since the end of the war a great proliferation of urban studies has been made. This bas been in keeping with the rapid growth of urban areas since that time, in contrast with earlier development. However, even in this short period of twenty years, the approach to urban geography has undergone great changes. [...]  Lire la suite

The title chosen for this study emphasizes the antithesis between political idealism and political realism in Polish political thought. Such a study goes beyond a mere intellectual exercise to touch upon the heart or political controversy in modern Poland. For in the opinion or the writer, amid the cross-crossing currents or international politics, social processes, and ideological trends--at least in the past two centuries the conflict between political idealism and political realism has represented the single most significant phenomenon in Polish political lire. The antonymy between political idealism and political realism in Poland is basically but a fragment, confined to …  Lire la suite

In Western Newfoundland, erosion surfaces are recognised at the following elevations: 2350-2500', 2100-2300', 1900-2150', 1750- 1900', 1550-1700', 1250-1500', 1100-1350', 1000-1150', 850-1000' and 750-850'. Surfaces below 750' were not investigated. All are considered to be of subaerial origin. By inductive reasoning, based on a recent hypothesis of the evolution of the continental margin of eastern North America, it is tentatively concluded that the group of surfaces above 2000' developed during a Cretaceous - early Cenozoic erosion cycle, and that lower surfaces are of later Cenozoic age. Uplift occurred at the beginning of the Cretaceous, in the mid Cenozoic and in the …  Lire la suite

The nephrotic syndrome bas been defined as a "pathological state of divergent etiologies, characterized by hyperlipemia, proteinuria, hypoalbuminemia and edema." (1) The primary site of the disease process is in the glomerulus and under the light microscope thickened, frayed glomerular basement membranes can be seen. (2)Electron microscopy on the other band, reveals that the lesion is chiefly due to an alteration of the epithelial layers of the basement membrane, there is a fusion or smudginess of the podocytes to form broad plaques of epithelial cytoplasm. Several etiological agents have been known to induce a nephrotic syndrome: systemic diseases such as …  Lire la suite

A simple model is proposed for the description of the scattering of neutrons by a vibrational even-even nucleus employing a complex spheroidal well surface interaction. This model is particularly convenient since it allows an exact analytic solution, which can be written in the form of correction terms to the spherical optical model. The application of this model to the s wave strength function results in a splitting of the single peak at A= 55. The inclusion of the effect of octupole excitation introduces desirable but minor modifications. Determination of the total neutron cross sections with this model substantiates the view …  Lire la suite

Anatomically the lung consists of two conducting systems to bring the inspired air and venous blood into contact. The effectiveness of gas exchange is largely dependent on the efficiency of these distribution systems. If parts of the lung are ventilated but not perfused, or perfused but not ventilated, no gas exchange will occur in these areas. Furthermore, ventilation in excess of perfusion, or perfusion in excess of ventilation are relatively inefficient. The optimum distribution is clearly when the quantities of ventilation and perfusion are matched, that is, the Ventilation/Perfusion ratio is equal in all lung units. To predict gas exchange …  Lire la suite

The balsam woolly aphid, Adelges piceae (Ratz.), is an introduced pest of European origin. It was discovered in Maine and New Hampshire in 1908, in Nova Scotia in 1929, and in Newfoundland in 1949 (Balch, 1952). True firs, Abies spp., are the only hosts of the aphid which causes severe damage to balsam fir, A. balsamea (L.) Mill., the predominant fir species in the Atlantic Provinces. Severe damage is caused by high numbers of aphids feeding in the crowns and on the stems of trees. In Newfoundland, rapid deterioration of tree crowns predominates; stem attack occurs infrequently and in widely …  Lire la suite

In his studies on the isolated cell envelope or a marine pseudomonad, Brown (1960, 1961) observed decreases in the turbidity or suspensions or the cell envelopes when these were incubated at low buffer concentrations. Turbidity changes did not take place when the buffer concentration was increased. These decreases in turbidity or the cell envelope suspensions he interpreted to being due to degradation or the cell envelopes. A number or soluble products were released when the cell envelopes were incubated. The nature or these suggested to Brown that their release was due to the action or an enzyme. Since the release …  Lire la suite

Younge, E. (Supervisor)  Lire la suite

Vitamin A has been studied intensely in its application to the fields of animal and poultry nutrition. Over forty years of investigation have provided extensive data on the chemistry, analysis, deficiency symptoms and nutritional requirements of vitamin A. However, there is still a scarcity of information concerning its mode of action in the body, particularly regarding carotenoid conversion to vitamin A and its absorption, transport, storage and association with disease. As recently as twenty years ago, fish liver oils and alfalfa meals were the major sources for vitamin A supplementation. These natural concentrated sources varied in potency and activity from …  Lire la suite

A knowledge of the role played by the papillary muscles in the activity of the heart and especially in the closure and function of the mitral valve has become important to the surgeon involved in surgery of the cardiac valves. Current surgical techniques tend to destroy the normal relationships of the papillary muscles and there is some clinical evidence (16.20) that this is detrimental to the cardiac dynamics. Current understanding of the importance of the papillary muscle mechanism is limited by a lack of information describing the activities of the papillary muscles. It is the object of this thesis to …  Lire la suite