McGill University Thèses et mémoires publiés en 1947

A scarcity of proteins suitable for the supplementation of animal feeds has existed for several years. Present indications are that this shortage is likely to continue, in view of an expanding livestock industry, increased consciousness of the importance of proteins on the part of feeders, and the world food situation in general. Consequently, a widespread search is being conducted for new materials to serve in this capacity, and information on their efficiency as protein supplements is important with a view to recommending their most efficient use. The most acute shortage has occurred in the case of proteins of animal and …  Lire la suite

This thesis does not attempt to present any complete picture of the period 1760-1791 in Canada, even though the French party of Adam Mabane was an important influence in Canadian affairs throughout most of those years. It attempts, rather, to trace the growth of one political group, and many of the events of the period that did not seem to pertain directly to that growth have thus been omitted. More particularly, this thesis is subject to the same limitations from which the French party suffered throughout its career: Its emphasis is entirely upon the political, judicial, and religious aspects of …  Lire la suite

This report presents the results of two summers of field work during which an area of approximately 140 square miles of previously unmapped country was systematically traversed. In addition it includes a correlation of all previous work in the Burlington Peninsula. The newly mapped areas include the north coast of the peninsula from Ming's Bight to Cape St. John and south to join the Tilt Cove - Bett's Cove area mapped by Snelgrove, (1931), and a strip about three miles wide along the coast from Nipper's Harbour to the south side of Middle .Arm, Green Bay. To assist in correlation, …  Lire la suite

It has been noted that in previous determinations of the velocity of sound in air, direct measurements of the velocity of sharp sound pulses, carried out over long distances, in the open, have yielded consistently lower values than indirect methods employing continuous sound of a definite frequency. The average of direct methods is about 330.8, and the average of indirect methods about 331«5im/s. Direct measurements of the velocity of sound in air have been made in the laboratory over a distance of 50 feet, using a high speed vacuum-tube counter-chronograph, microphones, and a spark discharge as a sound source. Since …  Lire la suite

Investigation of the effect of an electrical field on a chemical reaction involves the study of a system acting under the influence of an external perturbing force. It is of interest, therefore, to consider, in brief outline, the nature of this force, and the energy associated with it. Treatises on this subject are available in standard references (1, 2). The intensity of an electrical field is a measure of the force exerted on a unit charge when at rest in the field. The field intensity at any distance from a point charge is given by Coulomb's Law, and in practical …  Lire la suite

Quite apart from World War II, the years following 1934 may well be the most important in the history of the British West Indies in general, and of Jamaica in particular A series of labour disturbances over the British Caribbean area led to the West India Royal Commission of 1938-39, and this Commission made an exhaustive examination of the whole range of conditions, social and economic, prevailing in the (1) British colonies. Subsequently, under provision of the Colonial Development and Welfare Act, 1940, His Majestyfs Government appointed a Comptroller to work out, in collaboration with the local governments, long term …  Lire la suite

A period of devastating war has ended. The identification of the. period that follows must await the passing of time. True and prosperous peace, depressed and stagnant peace amidst want and privation, ar.med peace with the spectre of war hovering ever in the background mark the range of possibilities. The battlefield period of World War II is concluded, the military has passed to public administrators the responsibilities for the conclusion of World War II in the economic sphere.  Lire la suite

[...] Dans cette thèse nous voulons indiquer,démontrer, suggérer ces aspects de la vie "bourgeoise de la France que Hoger Martin du Gard présente si clairement dans le roman fleuve, ffLes Thibault11, les aspects familiaux, religieux, sociaux, psychologiques et historiques.  Lire la suite

The present process employed in the manufacture of GR-3 type synthetic rubber is that of emulsion polymerization. This method has the advantage of being easily controlled as well as possessing a faster rate of reaction than either bulk phase or solution polymerization (1, 2). The GR-S system discussed herein is made up of monomer, water, catalyst, modifier and emulsifying agent, which, upon agitation at a moderate temperature, results in the formation of a heterogeneous mixture. This complicates investigation of the locus of polymerization. The ease of control is due, in part at least, to the heat transfer from one medium …  Lire la suite

Knowledge o£ the importance or a nutritional factor in the etiology of rickets may be said to date from the pioneer work of Mellanby in 1919. The therapeutic value of fish oils tor rickets. although recognized for centuries~ was shown to be due to a factor quite distinct from vitamin A. The exact identity of the factor. however~ was obscured for some time when it was found that sunlight and ultraviolet irradiation also had curative effects. In 1926 accidental discovery of the role of cholesterol and related sterols made it possible to conclude that sunlight and cod liver oil cure …  Lire la suite

Ownership is defined by article 406 of the Civil Code of Lower Canada as "the right of enjoying and disposing of things in the most absolute manner provided that no use be made of them which is prohibited by law or by regulation". This right being, in theory, absolute, an owner cannot be forced to dispose of his property against his will. In order to make possible the erection and extension of public works and to prevent a recalcitrant owner from making public improvements Impossible by refusing to sell his property or exacting an exorbitant price it has been necessary …  Lire la suite

An area has been mapped in detail in the vicinity of the Box property ih the Goldfields district. The oldest formations are quartzites, dolomites, and various schists and gneisses. These are cut by granites and gabbros. The distribution and metamorphism of the rocks of the area are described. Cooke has considered the gabbro as younger than the granite, but the writer agrees with Alcock in considering the granite younger than the gabbro. The problem of the "Box granite" is discussed. The writer has shown that this" formation is composite, and has separated.on.the map gr.anitized sedimentary rocks from granites.  Lire la suite

Coote, J. (Supervisor)  Lire la suite

The preceding paragraphs have indicated the belt of townships under discussion and attention has been drawn to the early and most recent work, both in prospecting and geological surveying, that has been done in these areas.This thesis is a study to correlate published information on the belt of townships between the Porcupine District on the west, and the Beattie Mine Area in Duparquet township on the east. Most of the information has been compiled from Annual Reports of the Ontario Department of Mines. The sources of such information will be listed in the bibliography.  Lire la suite

Holden and Diver (1) in 1935 reported the isolation of a potassium acid salt (C7H9011NK) from Spanish ergot, and an acid (C6H8010) derived from this salt, that had not been reported before as constituents of ergot. The analysis and chemical properties of this acid led these authors to postulate the following structure for this substance, COOH.CHOH.C(OH)(COOH).C(0H)2.COOH (1,1,2,3, tetrahydroxypropane 1,2,3, tricarboxylic acid). The proposed identity of this acid relates It structurally to citric acid, COOH.CHg.C(OH)(COOH).CH2.COOH, (2 hydroxypropane 1,2,3, tricarboxylic acid), and for this reason, was named citergic acid, under which name it will be referre to.[...]  Lire la suite

Cyclohexylaldehyde, I, is a reactive substance reported to be polymerized by a trace of alkali to a high-boiling oil of the same composition and undetermined molecular weight (1). Since the aldehyde contains only one a-hydrogen atom, it is likely that the high-boiling oil is a linear condensation product of the aldol type, II. [...]  Lire la suite

will deal with a group of i.atients afflicted with a particularly severe trauma, and, it is hoped, some light may be thrown on the means whereby a more successful treatment and rehabilitation can be affected. The patients in question are a group of Paraplegics.  Lire la suite

This investigation arose out of a problem which was presented to the Physical Chemistry Laboratoties of McGill University, and represented as being of some national importance. During the war years works had been erected in western Canada for the production of large quantities of ammonia, and it was desirable that a peacetime use for this chemicalbe found. Furthennore there are large supplies of sodiumsulphate in the Canadian west. The world-wide success ofthe ammonia-soda process applied to sodium chloride led to the inquiry as to whether the same process could be applied to sodium sulphate. Preliminary investigation indicated that the formation …  Lire la suite

[...] This study was undertaken to develop new media, preferably of known composition; to study the metabolism of the orgenism when grown in these media; to elucidate the mechanism of streptomycin production, and finally to develop new methods of extraction and purification of streptomycin to obtain a product of higher purity, lighter color, and lower toxicity.  Lire la suite

Un lecteur au courant des oeuvres essentielles de la littérature française ne laisserait pas entrevoir une lacune considérable dans ses connaissances, s'il demandait en lisant le sujet de cette thèse, qui est Pierre de Coulevain et à quel titre mérite-t-elle une étude approfondie de ses oeuvres? Il est vrai que très peu de place lui est accordée dans la critique littéraire de son pays. Il a fallu môme des recherches opiniâtres pour établir la date exacte et le lieu de sa naissance.[...]  Lire la suite

When the importance of the hormones of the adrenal cortex under conditions of stress had been established, the value of the hormones for the treatment of the injured and fatigued was recognized. The only hormone of the adrenal cortex, which is commercially available for therapeutic application, desoxycorticosterone acetate, however, has been found unsatisfactory.[...]  Lire la suite

Fifty-six animals were used in an experiment designed to study the effect of feeding protamone and thiouracil to guinea pigs. A modified type of oxygen consumption apparatus was described* Observations were made on the weight, oxygen consumption, feed and water intake and respiration rate of the animals during pregnancy and lactation. The outcome of pregnancy, post mortem findings and histological changes in both the mother and offspring were noted, as well as the birth weight and gains of the young. Thiouracil (40 mg./day) was without effect on the guinea pigs. The two levels of protamone used (800 ug. and 1600 …  Lire la suite

The main purpose of this Paper is to examine Canada's Federal Wartime Labour Relations Regulations to ascertain what changes Order in Council, P.C1003 has made, and how it has been applied in the field of industrial relations. In making this examination it is proposed to give some introductory statement on labour contracts generally, and follow this up with a review of Dominion labour legislation and practice from 1S67-1939 especially in regard to the development in the process of collective bargaining and touching, incidentally, the emergence of State intervention in the settlement of disputes. [...]  Lire la suite

Little need be said here concerning the common brown rat Rattus norvegicus. since its economic importance is so widely understood. They have, due to their migratory and prolific breeding habits, invaded and colonised all lands throughout practically the entire world. However, financial losses occasioned by these rats is relatively insignificant when the risk of disease due to their presence is considered. Plague, Rat-bite Fever, Spirochaetal Diseases, Equine Influenza, Foot-and-mouth Disease, together with various helminths and perhaps Entamoeba histolytica, are all known to be disseminated by rats. With regard to the helminths, it may act as an intermediate host for cestodes …  Lire la suite

The more detailed study of the epilepsies carried out by Dr. Penfield and his co-workers has demonstrated that luany forms of epilepsy are of focal origin (Penfield and Erickson, 1941). Very often these foci are found in the cerebral cortex. The symptoms before, during and following the seizures point to definite localizations. However, certain forms of epilepsy have defied attempts at localization. Seizures consisting of generalized convulsions, without detectable aura, involving large portions of the central nervous system, are as yet difficult to understand as the outflow of a localized source or focus within the brain.[...]  Lire la suite

The common domestic fowl harbours a number of protozoan parasites of the Genus Elmerla; the most important of these is Elmerla tenella. the cause of caecal coccldiosls in chicks. E. tenella is transmitted from host to host in the form of a resistant oocyst, which, under suitable conditions of environmental temperature and humidity, undergoes internal division, resulting in four sporocysts each containing two eporozoites. These sporulated oocysts are Infective to a new host and are swallowed with the food as a contamination. The sporozoltes are liberated in the intestine of the bird and develop in the caeca, where a number …  Lire la suite

The shortage of editle fats and oils in Canada following the outtreak of war tecame critical during the latter part of 1942. At that time an investigation was tegun in this latoratory of the production of an editle shortening from linseed oil since it is the most important domestic vegetatle oil. This research was concerned with overcoming the unpleasant odor and taste associated with this oil when it was hydrogenated. The initial work involved an investigation of the techniques at present used in the oil processing industry v/ith a view to modifying the methods already in use. From this work …  Lire la suite

The region around an electrically charged object is considered to be pervaded by an electrostatic field, the idea of a field being adopted to explain the "action at a distance of the charge. The field strength at any point is measured by the work required to move a unit charge to this point against the repulsion of the field. The field strength, or potential gradient, is commonly expressed in volts/cm. and the potential difference across the field is measured in volts. Capacity is defined by the equation QrCE where Q, is the quantity of the charge in coulombs, E is …  Lire la suite

Bachelor lake is drained into Wasanipi lake through Bachelor creek which is very crooked and has fast and shallow waters. An outboard motor cannot be used over most of its course.The writer was employed by the Quebec Bureau of Mir1res and worked with Dr W. W. Longley of the University of Coloradc to study the geology of the area during the summer of 1946 and was in the field for about three months.During that time the shores of the principal lakes and rivers were examined and the intervening grou11d covered by mearlS of pace and compass traverses. the land traverses …  Lire la suite

One of the factors which runs like a thread through the whole fabric of history is manfs inborn desire to seek the unknown, whether it be new fields of knowledge or a virgin land where never before the foot of man has trod. Abram felt the call in that distant time and in compliance with his God's request, set Jewry upon the long and arduous journey which was to lead it to the Promised Land. Down through the years, succeeding generations have also heeded the impulse that has impelled them to seek out the green, exotic fields which would guarantee …  Lire la suite

Following the loss early in the Pacific war of virtually the entire natural rubber supply of the United Nations1, a vast synthetic rubber program was launched with a minimum of delay. A co-polymer of butadiene and styrene (Buna-S) had previously been discovered and showed the most promise as a satisfactory natural rubber substitute. Efforts were therefore concentrated on the exhaustive investigation of all ways of producing these monomers. One of the avenues of approach was that of high temperature vapor-phase catalysis. [...]  Lire la suite

There are several [...]  Lire la suite

[...] With these thoughts in mind, the present work on five species of Canadian deciduous trees, which fall into three distinct groups as regards changes in water content, has been undertaken. Microscopic observation and quantitative analysis have both been employed. Particular attention has been directed to the hemicellulose fraction although investigation of the seasonal changes in water content, starch and fat was also undertaken. The literature of a number of authors cited in the historical section of the literature review has not been read by the present writer. The source of this information is indicated in the bibliography after each …  Lire la suite

[...] Ozonolysls of carotene results in the formation of much larger fragments, and as in other oxidations geronic acid is formed. This acid is also obtained from the ozonolysls of vitamin A, Karrer (30). The mode of attack by ozone appears to be the primary formation of a heterocyclic five membered ring, at one of the double bonds, resembling a peroxide and epioxide. Recently, Hunter and Williams (28) have succeeded in converting carotene to vitamin A aldehyde by the carefully controlled oxidation with hydrogen peroxide, and subsequently converting this to the alcohol by reducing it with aluminium isopropoxide. Their yield …  Lire la suite

The first carotenoid to be isolated was carotenefrom the root of the cultivated carrot (Daucus carota),this was done by Wackenroder in 1831 and named by himcarotin (59).  Lire la suite

This thesis nresents preliminary work on the study of the structure a,nd mechanism of rain showers emploving radar as a research tool. The first chapter is compiled from published literature, and is intended to bring the reader up to date on both the previous and present work in the field. It includes a section on the basic theory involved when radar is used to investigate atmospheric pheno1nena. Section 1 of this chapter has been written in collaboration with Mr. W.M. Palmar.Chapter II is an assessment of the scattering functions presented by RYDE( 4 ), a pioneer in the theoretical treatment …  Lire la suite

The method ot separating substances by centrifuging is so ancient that its origin is unrecorded. In recent years, its use has become more widespread until, today, centrifuges are employed in many industries and in most laboratories. However, the development of the technique ot employing very high centrifugal fields tor the measurement ot particle sizes has taken place since 1923.  Lire la suite

The consumer is the individual who acts at the end of the economic chain. Land is farmed and mined in order to produce natural resources. Out of these resources industries are created. Some of the products go directly to the consumer, others are transformed into capital goods. The latter serve as materials for further processes of production, the output of which is again divided between capital and consumer goods. In a modern economy this development goes on through many stages which may be called the diversification of production. The final result in all cases is the production of goods and …  Lire la suite

After years of research, whey, a by-product of cheese and casein manufacture, is still, to a large extent, a waste material in Canada. Whey has approximately the following composition: fat .3%, protein .8%, lactose 5.1%, ash .6%, and water 93%. It may be seen that the valuable components of whey constitute a relatively minor portion of the total material. Due to this fact, transportation of whey is a costly item and with cheese factories widely dispersed throughout the country, the accumulation of the liquid at one centre is an expensive proposition.[...]  Lire la suite

Phenothiazine (thiodiphenylamine) is one of the most efficient drugs yet discovered for the removal of intestinal worms. It has a low toxicity for the sheep and has proved of great commercial value in the production of wool and mutton. The potential consumption of Australia and New Zealand was estimated by Gordon(63) in 1941, to be 1500 tons per year and the present day consumption on the North American continent is enormous. The value of any anthelmintic must be appraised in terms of the benefit derived by the host from the prevention of parasitic infestation. For instance, no one has shown …  Lire la suite

In the study of the propagation of radio frequency power along a transmission line, one of the most important factors is the manne: in which the voltage and current vary with distance along the line. The theory of voltage and current variation along a radio frequency transmission line has been treated in detail in many texts, (1, 2, 3) and some of the conclusions of particular interest to the subject of this paper will be repeated here. In the installation and use of radio frequency transmission lines the engineer must have means of making accurate measurements of the voltage and …  Lire la suite

Part I - The Dielectric Constant of S2F10. Highly purified disulfur deoafluoride was found to have a freezing point of -54.2ºC. Dielectric measurements on the liquid and vapour using a refined Schering bridge revealed the following: Dielectric constant (liquid, 0ºC.) - 2.064; dielectric constant (vapour, 50cm.) - 1.0028; power factor (liquid 0°c.) - 0.0311; specific conductivity (A.C.,0ºc.) - 1.94 x 10^-10 mhos; molar polarization - 33.4 c.c.; atomic polarization - 12.1 c.c.; dipole moment - 0. These indicate that S2F10 is a highly stable non polar dielectric. Part II - High Pressure Instrumentation At High Temperatures. Four reliable instruments for …  Lire la suite

The experimental data which will be presented consist of estimations on urine samples of normal humans and of patients suffering from a variety of clinical conditions. The urines have been assayed by a biological and by a chemical method, both of which purport to measure substances similar to those isolated from the adrenal cortex. The chief purpose of this undertaking was to define the correlation between the results of the bio as say and chemical assay on each sample of urine. A secondary purpose was to determine the suitability of these methods (particularly the chemical method) for use in hospital …  Lire la suite

The past few years have seen many refinements in our electronic equipment; the accuracy and stability, always weak points in such equipment, have been notably improved. This improved performance has required, in many cases, the use of accurate, stable voltages for operating the ecuipment, and, as a result, the use of voltage-regulated aower sources has greatly increased. It has been the authorfs experience, in designing such regulators, that performance was not always as good as had been expected, and it was the desire to resolve some of these anomalies that led to the present investigation.[...]  Lire la suite

In 1944. the Wood Chemistry Committee of the Canadian Pulp and Paper Association, Technical Section, recommended a broad research on the action of inorganic halo gen-containing oxidants on wood and its constituents. Sodium chlorite was chosen for early investigation because it promises to be a particularly commercial bleaching agent for pulps, because it had not been extensively studied as an oxidant for the degradation of organic substances and because the literature suggested that it had no effect, or at least a very slight effect, on the holocellulose fraction of wood. [...]  Lire la suite

The Iserhoff river area lies in Abitibi East county at some 80 miles north of Senneterre, a town on the Canadian National Railway. It is bounded by longitudes 76°45’ and 77°00’ west and by latitude 49°45’ north and by a line about 4 miles south of latitude 49°30’ north [...]  Lire la suite

Hexamethylenetetramine, commonly referred to as hexamine or urotropine, is a compound of very considerable chemical interest, since it contains, potentially at least, the high reduction and condensation reactivity of six formaldehyde molecules together v;ith the extensive combining pov/er of four tertiary amine nitrogens. The structure of this molecule has been the object of much speculation since Butlerov (1) first prepared it in 1859 by the reaction of gaseous ammonia with formaldehyde. The structure suggested by Butlerov for the compound he identified as having the empirical formula C6H12N4. is as follows [...]  Lire la suite

The neurologist and neurosurgeon are familiar with the aseptic meningitis that follows subarachnoid haemorrhage, whether it be due to intracranial operation, craniocerebral injury, or ruptured or leaking intracranial aneurysm. The aseptic nature, however, often is not assured until the meningitis has uneventfully passed, v\^en the causative agent is attributed then to blood in the subarachnoid space. Of great concern to many neurosurgeons is a recurrent form of aseptic meningitis following certain intracranial procedures. Finlayson and Penfield in 1941 postulated that the cause of this form of meningitis is due to the presence of breakdown products of a blood clot entering …  Lire la suite

The interest in the problem of veteran rehabilitation was derived from the experience gained while working for the National Research Council of Canada, under the direction of Dr. D. Ewen Cameron during 1945 and 1946. The report which was written at that time was entitled Psychological Adjustment of Ex-Service Personnel. Much of the material which has been used in this thesis was gathered for the above mentioned report. However, it was not analysed in respect to the frame of reference used herein. The educational data was not included in the report. Interviews with civilians, student veterans, faculty members, labour leaders, …  Lire la suite

The biochemist has been aided greatly in recent years in developing his knowledge of the metabolism of organic and inorganic substances in biological systems through the use of isotopes as tracers. Since the chemical properties of an element are determined solely by the number and distribution of electrons surrounding the nucleus, it is apparent that all isotopes of a given element should behave in an identical manner when participating in a chemical reaction. It is this fact which enables one to use separated isotopes to label a compound and to use it as a tracer in a chemical reaction or …  Lire la suite