Showing papers by "University of Winnipeg published in 1973"

The heterochromatic B chromosome of maize: the segments affecting recombination

Abstract: The B chromosome of maize is known to increase recombination in specific regions of the genome. In an attempt to determine the portion of the B responsible for crossover enhancement, translocations between the B and A chromosomes were used to dissect the B into four distinct segments. The effects of the segments on crossing over were studied in a sensitive region composed of chromatin from chromosomes 3 and 9. The relatively euchromatic chromomeres terminating the B lacked enhancement activity, but the remaining segments, all of which possess large amounts of heterochromatin, were capable of elevating recombination. There was no localization of activity to a specific heterochromatic region, however.

The 40 Ca(p,2p) 39 K reaction at 45.0 MeV

Abstract: A study of the 40Ca(p,2p)39K reaction has been made for two states of 39K, the 1d3/2−1(g.s.) and 2s1/2−1(2.53 MeV). Angular correlations at symmetric, coplanar angles between 30 and 105° have been ...

A New Method for Trapping water-mites in the Benthos of a Lake

Abstract: In trying to assess the interspecific relationships set up between water-mites in Marion Lake, British Columbia, several trapping methods were used. Of these methods available none were found to be adequate for the problem under investigation and a new method of sampling the benthic water-mites was devised.

The movement of irish cattle in scotland

Abstract: For many years Ireland has been the main source of imports of older store cattle into Scotland and, even though the trade has declined somewhat in recent years, Irish cattle fattened in Scotland still account for about one-fifth of the clean fat cattle output from Scottish farms. Moreover, in recent years heifers and cows from Ireland have become the main source outwith Scotland for replacements for Scotland's rapidly expanding beef breeding herd. It is the purpose of this paper to examine the distribution of these Irish cattle to farms in Scotland, a task involving examination of such diverse factors as dealers, markets, types of farms and the yearly seasonal demands by Scots farmers for homebred and imported store cattle. Information has been derived from hitherto neglected sources, including a wealth of data obtained from Divisional Veterinary Officers, Area Livestock Officers and Agricultural Advisers throughout Scotland, and data already available in censuses, government reports and agricultural journals have been viewed in a new light. Resume LE MOUVEMENT DU BETAIL IRLANDAIS EN ECOSSE Depuis longtemps l'Irlande est la principale source des importations en Ecosse du betail adulte maigre et, bien que ce commerce accuse un certain declin depuis ces dernieres annees, le betail irlandais engraisse en Ecosse constitue toujours environ un cinquieme du betail gras commercialise provenant des exploitations ecossaisses. De plus, depuis quelques annees les vaches et genisses irlandaises sont devenues la source principale de remplacement en Ecosse pour les elevages bovins reproducteurs qui sont en rapide expansion. Le present article examine la repartition de ce betail irlandais dans les exploitations ecossaises, tâche qui implique aussi l'etude de facteurs aussi divers que les negociants, les marches, les categories d'exploitations, et la demande annuelle et saisonniere des agriculteurs ecossais pour le betail maigre tant importe que provenant d'elevages nationaux. Les renseignements necessaires a cette etude ont ete obtenus aupres de sources jusqu'a present laissees dans l'oubli, notamment la mine de donnees recueillies en provenance des responsables des administrations publiques nationales ou regionales des services veterinaires, du controle du betail, et des services consultatifs agricoles dans l'ensemble de l'Ecosse, cependant que les donnees dont l'on disposait dejaa partir des recensements, des rapports officiels et des publications professionnelles ont ete reexaminees sous un eclairage nouveau. Zusammenfassung DIE BEWEGUNG VON IRISCHEM VIEH IN SCHOTTLAND Viele Jahre lang war Irland die Hauptquelle fur Importe von alterem Bestandsvieh nach Schottland und, obwohl der Handel in den letzten Jahren sogar etwas abgenommen hat, macht irisches Vieh, das in Schottland gemastet wurde, immer noch ungefahr ein Funftel des reinen Mastviehoutputs schottischer Farmen aus. Ferner wurden Kalber und Kuhe aus Irland in den letzten Jahren die auswartige Hauptquelle Schottlands fur den Ersatz der schottischen Rinder-zuchtherde, die rapide wachst. Der Zweck dieses Artikels besteht darin, die Verteilung dieses irischen Viehs auf die Farmen in Schottland zu prufen, eine Aufgabe, die die Prufung solch diverser Faktoren wie Handler, Markte, Arten der Farmen und die jahrliche und saisonale Nachfrage der schottischen Farmer nach einheimischem und importiertem Bestandsvieh einschliesst. Informationen wurden aus bisher vernachlassigten Quellen gewonnen. Sie schliessen eine Vielfalt an Unterlagen ein, die von Bezirksveterin-arbeamten, Gebietsbeamten fur Vieh und landwirtschaftlichen Beratern aus ganz Schottland zur Verfugung gestellt wurden, und Unterlagen, die schon in Zahlungen, Regierungsberichten und landwirtschaftlichen Zeitschriften verfugbar waren, wurden in einem neuen Licht gesehen.

Individual differences among students who meet research subject requirements early versus late in the term as a source of sampling bias

Abstract: The predominant method of recruiting participants for behavioral research in university settings permits students to choose which experiments of many to participate in. When this method is used, the possibility of sampling bias arises because some students make their choices early and others late in the term. This study identified several Q-types (“ideographic” patterns derived from Q-factor analysis) that varied substantially with regard to choice time and thus offered suggestive evidence for a bias thesis. It was recommended that prevalent participant recruitment policy be changed so that experimenters can arrange appointments on a random basis.

The Disruption and Decline of the Oklahoma Socialist Party

Abstract: Students of the Socialist Party of America are well-acquainted with the extensive and persistent support it received from poor farmers, many of them tenants, in Oklahoma and Texas. David Shannon and, more recently, James Weinstein have both noted that the Socialist Party of Oklahoma had a more active and widespread membership than any other state branch of the Party. Both writers have also given proper emphasis to the shattering impact of repression upon the widely scattered and vulnerable Socialist locals in the rural areas of the Southwest after the United States entered World War I. Weinstein especially has suggested that the Socialist Party was a broadly-based and effective political organization, not only ' in ' but ' of ' the world of American workers and small farmers. Pointing to the vigour of the Socialist Party's support in the North and East after it opposed American participation in the war, Weinstein argues that an American Socialism attuned to American conditions and needs had much potential vitality and could have been a significant political force in the country. For this assertion Weinstein was sharply criticized by a reviewer who argued that he exag gerated the depth of the Party's support after 1912 and that he specifically failed to perceive the German ethnic origin of much of the Party's ' new ' support for its anti-war position.1 If we look more closely at the Oklahoma evidence, however, Weinstein's thesis that a ' grass-roots ' party was the victim of political repression sanc tioned by national authority seems to be borne out. In Oklahoma the Socialist Party was almost wholly comprised of native, white Americans of Anglo Saxon ancestry and southern background. There were no foreign-language

A Teleologigal Theory of Value

Abstract: We can approach the nature of value from a number of starting points. Immersed in the realm of art, we may wonder what differentiates the beautiful from the ugly, the excellent from the mediocre. Our search might lead us to ultimate standards of value or canons of beauty. Engaged in social or cultural analysis, we can note the variegated and often shifting values in terms of which classes of people identify themselves or are identifiable to others. Reflecting on these can yield characteristic values. Looking at the dynamics of individual lives, we can ask after the values that motivate a person, his personal values. But perhaps most commonly in philosophical circles, it is ethics which forces us to take stock of the nature of value as we search for the nature of ethical values. Yet values, although presupposed by each of these areas of enquiry, are not restricted to any of them. A general theory of value can, and therefore ought, to go beyond these more specific domains.