McGill University Thèses et mémoires publiés en 1966

Insect pests of public health importance were the first among which the development of highly insecticide resistant strains was shown to be widespread. More recently, numerous instances of resistance among economically important insect pests of growing crops have been revealed. The relative scarcity of reported resistance in stored-products pests is probably a reflection of fewer investigations and fewer instances of continued insecticidal controls. The possible development of resistance at a future date in stored-products pests and the chance that one might avoid such development if it can be foreseen should be adequate justification for the present investigation. It was felt …  Lire la suite

Plots of areal coverage as a function of height and intensity have been made for 17 radar echo patches all smaller than 1300 nmi.^2, that were recorded on the constant altitude maps of the 3-cm McGill radar. From these plots, vertical profiles of flux and density of precipitation have been obtained. The profiles generally showed maximum values aloft. The maxima were usually observed to descend or remain at one level. Occasions of ascent were less frequent. [...]  Lire la suite

Ice was grown from melts of tap water and low salinity NaCl brines. The melts could, be heated from below and stirred, so that the rate of freezing, the temperature gradient below the solid-liquid (S-L) interface, and the initial concentration of the melt could be varied independently. The morphology of the S-L interface was observed at various stages of growth. [...]  Lire la suite

The emission of multiply-charged fragments (Z > 3) in nu.c lear rea ct ions was f ir st recorded by Perk ins (1) who studied disintegrations caused by cosmic rays. Subsequently the production of complex particles has been observed in many nuclear reactions induced by projectiles with a wide range of energies. The emission of these fragments has been investigated with respect to fragment yield, charge, energy, and angular distribution, using counter, radiochemical, and emulsion techniques.  Lire la suite

About 25,000 acres of flax for fiber was grown during the second world war in the Province of Québec when the traditional sources of supply in Europe were cut off (Anonymous). With the armistice, the prices dropped and farmers abandoned this crop because of competition from European countries. In the 1950's a few farmers became interested in growing flax for linseed oil, chiefly in the Montreal area. The acreage bas increased steadily, so that by 1964 flax was being grown on about 35,000 acres in this Province (Shiller 1964). [...]  Lire la suite

In this work a physiological communication system, the ear, is studied by the classical technique of input-output analysis. It appears that in building models, physiologists seldom use this method, but instead commonly try to describe the system through its relevant physical, physiological and biochemical laws. [...]  Lire la suite

This thesis is a small contribution to the growing amount of information that has been gathered about Arab nationalism. Its purpose is more specific than most studies of Arab nationalism have been in that it seeks to deal only with four figures who were Christian rather than Muslim and who happened to be Arabs of the fertile Crescent. Apart from placing these writers in a new perspective, this thesis has little that is very original to offer. But, it is hoped that the fairly careful and detailed analysis of some of the writings, offered in English for the first time, …  Lire la suite

Cancer is almost as old and pervasively present as life itself. Its toll has mounted relentlessly through recorded history, and its claim of human life to-day is second only to circulatory diseases. The word cancer is Latin for 'crab'. [...]  Lire la suite

Stefan's equation for ice accretion has been modified to take into account the affects of snow depth and density. For regions in the Canadian Arctic the modified equation, when applied in the presence of a light snow cover with climatic estimates of heat loss, gave a satisfactory explanation of the observed ice growth (correlation coefficient = .99). [...]  Lire la suite

This report presents an analytical treatment of the non-uniform propagation of symmetrical imploding shocks and detonations in an initially undisturbed medium. In particular, cylindrical shocks and detonations are studied in detail. Throughout the analysis, heat transfer and viscous effects are neglected and a perfect gas with constant ratio of specific heats is considered. [...]  Lire la suite

La première impression que ressent le lecteur à la lecture des "Chants", c'est le dépaysement. L'oeuvre nous désoriente, et, après une première lecture, nous avons l'impression de nous retrouver dans un fouillis inextricable. [...]  Lire la suite

The introduction of Ge (Li) detectors for gamma rays allows a much better resolution than that obtainable previously with the scintillator-photomultiplier unit. Indeed the average loss of energy per ion pair in a Ge (Li) detector is about 2.4 eV, compared to the 130 eV required for one photoelectron in a scintillator-photomultiplier unit. [...]  Lire la suite

Disease symptoms often have diagnostic value. They are used also to determine the nature of the alterations in the physiology of the diseased plant, and to estimate the severity or extent of the damage caused. The search for diagnostic features is usually performed in white light. Descriptions of symptoms and conclusions as to the nature and extent of damage reflected by symptoms are usually based on the appearance of symptoms in that light. [...]  Lire la suite

Atmospherical environmental factors have long been known to affect rust development on green plants. Environmental conditions subsequent to infection usually have more effect than conditions prior to infection. Moisture, temperature, and light have been shown to be most significant of the atmospheric factors. [...]  Lire la suite

This statement helps explain what I personally experience after having travelled half way across the world and stayed in Canada for almost two years. Accordingly, this work is an attempt to look back into the educational systems in the different territories of my homeland, Malaysia, and to examine them from a broader perspective and in terms of other systems. [...]  Lire la suite

Up to the present time it has been customary for hearing aids to reproduce approximately the same range of frequencies as the telephone (300 - 3000 eps). The aim of this investigation was to determine whether additional low frequency amplification, achieved by the provision of hearing aide with a frequency range from 80 - 3000 eps, would contribute significantly to the audition of speech among children with low-tone residual hearing. [...]  Lire la suite

Predacious fungi that capture and kill nematodes live, amongst other places, in the soil where it is assumed that they participate in the natural control of nematodes, including the plant parasitic species that cause tremendous losses to farmers. There are predacious fungi in the soil which prey on amoebae, rotifers, rhizopods and other small animals but they were not dealt with in this study. [...]  Lire la suite

A study of the autonomy of theology with reference to the philosophical thought of Ludwig Wittgenstein and the theological thought of Karl Barth, could be approached in a number of different ways. [...]  Lire la suite

Preliminary studies on the biosynthesis of steroids by the rat adrenal using radioactive precursors have revealed that under 'in vitro' conditions progesterone-4-14c is transformed to at least 23 labeled products (1,2). Out of these only 8 have been identified. [...]  Lire la suite

The ability of sectioned rat adrenals to respond to ACTH in vitro has been demonstrated (1,2,3) but a detailed time study to show the degree and maintenance of this response over a prolonged period has not been carried out. The first aim of this study was to investigate the conditions necessary for the maintenance of increased corticosteroidogenesis, in response to ACTH, over an incubation period of 10 hours. [...]  Lire la suite

A number of experiments have indicated that the deaf do not perform as well as the hearing in various visual memory and learning situations (Pintner and Paterson, 1916, 1917; Blair, 1957; Hartman and Elliott, 1965). Pintner and Paterson (1916, 1917) suggested that the inability of deaf subjects to engage in verbalizations and thereby provide themselves with auditory imagery accounts for this deficit. [...]  Lire la suite

Cardiogenic shock is the syndrome of acute circulatory collapse secondary to myocardia1 infarction. This type of shock is responsible for much of the overall mortality of acute coronary artery occlusion especially in the younger age group. [...]  Lire la suite

Many of the following arguments were mentioned in a paper by Licko and Svec [5]. We are going to use these lemmas throughout Chapter II. [...]  Lire la suite

The St. Lawrence River is one of the youngest of the world's great rivers. Much of its course below Lake Ontario traverses the floor of the Champlain Sea, a late-glacial marine embayment which flooded the lowland between the Canadian Shield and the Appalachian highland. [...]  Lire la suite

Tryptophan is functionally important in biological systems, as the free amine acid, as a component of proteins, and as a precursor of physiologically active substances. If administered in excess amounts, it modifies carbohydrate and fat metabolism and the activities of some enzymes. A dietary deficiency of this essential amino acid results in attenuated growth, and alterations in the metabolism of certain substances. Within the protein molecule, tryptophan is believed to play a role as an intermediate in some enzymic reactions. [...]  Lire la suite

Le Journal du Père du Ranquet, s.j., est un manuscrit à peu près inconnu. Sa grande valeur, encore inexploitée par les historiens, indianologues et linguistes, lui valait plus qu'une thèse de maîtrise ès arts. [...]  Lire la suite

The year 1957, a year in which I obtained my Master's degree at the University of the Panjab, Lahore, Pakistan, was the centenary of the Indian uprising of 1857. In this year the peoples of India and Pakistan elaborately celebrated the 100th anniversary of what they considered to be the first war of Indo-Pakistan independance. [...]  Lire la suite

Some of the experiments described in this thesis were originally undertaken to discover how the response evoked in cells of the visual cortex by a single light-dark border stimulus was altered when a second such border was added in a different part of the visual field. [...]  Lire la suite

It is now generally accepted that the clinical efficacy of the preserved blood specimens is determined by the metabolic status of the erythrocytes. The changes that occur in the metabolic potential of the cells during the storage period influence greatly the viability of the cells, that is, the ability of the cells to remain in the circulation on transfusion. [...]  Lire la suite

During adult life many though not all tissues of the rat continue to increase in size through cellular proliferation. For example, neurones show no evidence of mitoses whereas in the intestine mitotic activity of the lining epithelium is so great that the epithelial cell population is replaced once in three days. [...]  Lire la suite

The presence of great quantities of cod along much of the North American eastern seaboard was a significant factor in the early settlement and economy of the ares. European fishing fleets first appeared before 1510 (Innis, 1954). [...]  Lire la suite

A fast response vertical anemometer and wet and dry bulb thermocouples were used to measure the turbulence within a forest canopy. Five trials of ten minutes duration were run in each of a sixty-five foot high pine forest and a fifteen foot high lodgepole pine forest. [...]  Lire la suite

Jane Austen has been called an artist and a moralist. Few attempts have been made, however, to illustrate how she combines the artist and the moralist in her novels. In the light of modern critical thinking, especially, which tends to isolate the function of art from that of morality, Jane Austen's works seem to demand elucidation. [...]  Lire la suite

The findings of this study are primarily based upon fieldwork, for the reason that only scanty written sources exist on the Lower Yuna. This dearth of background information on which to build sometimes results in an unsophisticated level of treatment and has made necessary the inclusion of substantial descriptive and explanatory material in the form of expanded footnotes. [...]  Lire la suite

The investigations reported in this thesis are concerned with the synthesis of ribonucleic acid in rat brain cortex slices. In an attempt to correlate the metabolism of RNA in vitro with the functioning of the brain in situ, brain slices were stimulated by changes in the concentrations of cations in the incubation medium as well as by the application of electrical pulses. [...]  Lire la suite

Spectral analysis (primarily in terms of spherical harmonics) is applied to the atmospheric dynamical equations in general, to truncated barotropic systems in particular and, in addition, to the global geopotential height field of the 500 mb surface for September 1957. [...]  Lire la suite

The term sex education is one which has been and continues to be used in many different contexts. Few if any definitions of sex education convey a standard meaning of the term. Sex education can imply instruction and training offered to young children, adolescents, or adults. It may be given in the home, by the parents, at school, at church, or by scouting or youth oriented groups. [...]  Lire la suite

Le nom d'André Dhôtel fit du bruit pour la première fois lorsque, en 1955, il remporta le Prix Femina pour son roman 'Le pays où l'on n'arrive jamais'. Qaoiqu'il ait déjà publié à cette époque une douzaine de romans, entre autres 'David' qui lui valut le Prix Sainte-Beuve en 1948, sa réputation comme romancier n'était encore guère établie auprès du grand public. [...]  Lire la suite

An interface can be defined as a bounding surface across which there is a discontinuity of some kind. Such discontinuities need not be abrupt, but may be in the form of a transition zone, so that interfaces may or may not have a thickness. Because of disturbances and irregularities at the interface, atoms there are in a state of higher energy than are the atoms in the homogeneous bulk. [...]  Lire la suite