Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

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Please read the abstract in the section 00front of this document / Thesis (PhD (Food Science))--University of Pretoria, 2006. / Food Science / unrestricted

Orientador: Paulo César Razuk / Banca: Augusto Ronchi Junior / Banca: Waldemar Gastoni Venturini Filho / Resumo: O produtor de leite de cabra, com o apoio e incentivo de entidades governamentais, privadas e ONGs; agrega tecnologia ao leite garantindo uma melhor distribuição de renda e qualidade de vida, fixando-se cada vez mais no campo. O resfriamento do leite após a ordenha é a melhor medida para retardar a proliferação natural das bactérias e sua temperatura deverá ser reduzida de 36 ºC para 4 ºC no período máximo de 2 horas em cada ordenha. O tempo transcorrido entre a primeira ordenha e seu recebimento na usina de beneficiamento deverá ser, no máximo, de 48 horas. Neste trabalho propõe-se projetar e analisar tanques de resfriamento de leite com capacidades úteis de 320, 500 e 2000 litros em aço inoxidável austenítico AISI 304, utilizando-se do coeficiente global médio (U) e das temperaturas médias de saturação do fluido de refrigeração (X) obtidos em ensaios experimentais. Um objetivo secundário foi verificar a possibilidade da utilização de caixas d'água de polietileno com a mesma capacidade dos tanques, por ser um produto acessível, de baixo custo e que atende as exigências sanitárias, visando obter um produto que possa substituir o aço inoxidável, mas descartou-se esta possibilidade, pois o fundo plano destas caixas dificultaria a retirada do produto e a limpeza. Nos cálculos envolvidos na geometria para a construção dos tanques, utilizou-se da relação entre a altura cilíndrica e o diâmetro que contemplasse respectivamente, o número... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The goat milk producer, with support and encouragement of governmental and private agencies as well as NGOs, aggregate technology to milk production ensuring a better distribution of income and life quality for all his family, making it possible the maintenance of the country life. The milk cooling ater the milking process is the best alternative to delay the natural proliferation of bacteria. The milk temperature should be reduced from 36 ºC to 4 ºC in a maximum period of time of two hours for each milking. The elapsed time between the first milking and the milk delivery in the processing plant shall be at most 48 hours. In this work, we propose to design and analyze milk cooling AISI 304 austenitic stainless ateel 320, 500 and 2000 liters tanks, using the mean global coefficient (U) and mean saturation temperatures of the refrigeration fluid (X), obtained experimentally. Besides stainless steel built tanks, accessible low cost polyethylene watertanks, with same dimensions of the steel tanks, attending the necessary sanitary requirements were used, aiming for an alternative product that can replace stainless steel. However, this possibility was rejected, because its flat basis would make it hard the product removal and its cleaning. During the geometric calculations in the manufacturing of the tanks, the relationship betwwen the cylindrical height and the diameter was defined in order to provide the golden ratio and batch square... (Complete abstract click electronic access below) / Mestre

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 108-110). Also available via the Internet.

Thesis (M.S.)--West Virginia University, 2006. / Title from document title page. Document formatted into pages; contains ix, 78 p. Vita. Includes abstract. Includes bibliographical references (p. 60-61).

Indigenous goats are one of the most important sources of animal protein to many rural poor, but this is being threatened by the way they are managed and the way people utilize the land. Goats supply the rural people with meat, milk, manure (which can be used as fertilizers) and hides which can also be used for different purposes. Milk and meat have always been an important component in the normal balanced diet, providing energy, protein, calcium and other minerals and vitamins. As the population in South Africa continue to grow, meat and milk will become more important as a source of high quality protein to reduce malnutrition especially in children. As such milk and meat production is a vital form of primary health care in both rural and peri-urban areas. Donkin (1998) indicated that, in commercial enterprises, milk is usually from cows. However, the disadvantages with cows as a source of milk for the household and small holder farmer are that dairy cows are expensive, require large amounts of food, produce large amounts of milk (more than household needs), have a relatively long generation interval and when slaughtered have large carcases (posing problems of storage and distribution). In contrast, dairy and meat goats are less expensive, are easily handled by women and children, eat less, produce appropriate quantities of meat and milk for household consumption, reducing storage problems, have a short generation interval and produce more progeny. In spite of all these advantages, Bembridge and Tapson (1993) indicated that productivity from goats in the communal farming system, which is based on the extensive system is poor due to a low weaning rate, a high mortality rate and low turnover. Goats are often blamed for veld deterioration and damage to soil subsequent to poor animal and grazing management. Goats are hardy animals, that can survive where other animals cannot (Webb et al., 1998). One of the major problems at present however, is the availability of adequate grazing and the current land tenure systems. Goat farmers share common grazing land, which makes it very difficult to manage since the chief of the area holds the land in trust. This is one of the reasons why rural land is poorly managed. Our concern as researchers is how we can help rural people to sustain the productivity of these animals. This research is focused on the fact that" some 30% of the population of South Africa are classified as ultra-poor (i.e. those who do not obtain sufficient food) and of these, 80% are blacks living in rural areas, it is understandable that the efficiency of animal production in rural communal farming systems has been perceived by some as the most important issue for animal production research". The aim of this study was to quantify the effect of land tenure system on goat production in two rural villages, Moutse and Phooko. The analysis is based on 1998 / 1999 survey data. Surveys of landless and smallholder farmers were conducted in the KwaNdebele district of Mpumalanga in 1998 and 1999. In total 26 farmers were interviewed. The interview was through a questionnaire which was distributed to participating farmers with the help of an extension officer from the villages. The effect of land tenure on goat production was analysed by determining the productive efficiency of livestock in the villages, and the contribution of livestock to the livelihood of the local people. Finally farmers were classified according to categorical characteristics such as type of animal farmed with, those practicing minor management versus those who do not, and the type of farming system practiced e.g. animal or mixed farming. The results show that all the categories mentioned i.e. type of management, type of farming and land tenure system influence animal performance to some extent. It is concluded from the results that to successful farmers, land tenure seems to be a major limiting factor. The characterization of farmers that are economically successful in terms of goat I animal husbandry shows that they have little or no land and no regular substantial off farm income. Therefore, they rely mainly on goat I animal husbandry to provide a constant income, which emphasize the importance of livestock in rural farming systems. Although goats are less popular compared to cattle (often used for lobola), they form an important part of most rural farming systems, particularly in providing meat and milk for rural people. The results of the survey show that from the 26 farmers interviewed, 13 are farming with goats and cattle, and the remaining 13 with a combination of goats, cattle, sheep and sometimes pigs. KwaNdebele, like other former homelands has an agricultural potential which is largely underestimated because of lack of skills and training, absence of ownership, overstocking and lack of veld management. From the result, it is concluded that it is difficult to enforce proper management and conservation measures under communal land. Although the results suggests only a slight effect on land tenure on animal performance, land tenure does have an effect on the implementation of conservation measures. In economic terms, the cultivator I farmer is said to lack incentives to carefully husband the holding he does not have property rights that internalise the costs and benefits of conserving or failing to conserve the land (Basset and Crummey, 1993). / Dissertation (M Inst Agrar ( Animal Production))--University of Pretoria, 2007. / Animal and Wildlife Sciences / unrestricted

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Testicular function is fundamental to male fertility, since testicular cells act in collaboration with each other to signal sex differentiation, the initiation of puberty and spermatogenesis. Complications that can be influenced by many factors will affect sperm number, morphology, motility, chromatin quality and acrosomal integrity. The purpose of these studies was to analyze the changes in gene expression in the developing testes and analyze the seasonal changes in gene products in sperm of mature bucks. In the first experiment, testes were harvested from five Alpine bucks at 0, 2, 4, 6, and 8 months of age. Northern and in situ hybridization indicated that the largest change in gene expression occurred during the first 4 months of goat testes development. Sex determining region Y-box 9 (SOX9) and Heat Shock protein A8 (HSPA8) peaked at 2 months of age, and were expressed in Sertoli cells and spermatogonium, respectively. At 4 months, expression of Stimulated by Retinoic Acid gene 8 (STRA8), Protamine1 (PRM1) and Outer Dense Fiber protein 2 (ODF2) was strongly up-regulated in early and maturing germ cells, respectively. In the second experiment, RNA from ejaculated spermatozoa collected from mature Alpine bucks in peak (October) and non-peak (April) breeding season were analyzed on a 4 x 44K Agilent bovine microarray. One thousand three hundred and eighteen gene products were differentially expressed 2-fold or more (p ≤ 0.05 ) was expressed in mature goat sperm collected October and April. To eliminate the likelihood of false positives, the cut off was set to fold change of 3 or more at p ≤ 0.01 which narrowed the list of genes to 50 transcripts. Real time PCR results confirmed the expression of Sperm Adhesion Molecule 1 (SPAM1) in April, and the expression of Glycerol kinase 2(GK2) and Myc Binding Protein 2 (MYCBP2) in October. Based on the results from both experiments, it can be concluded that: SOX9 and HSPA8 expression play an important role in tubular formation and germ cell maintenance; two months after SOX9 and HSPA8 expression, genes that are associated with spermatogenesis initiation and completion are upregulated; and validation of the seasonal changes in sperm mRNA levels may provide additional insight to testicular events as they relate to breeding and non-breeding season.

This thesis has explored the theme of Productive Unity in John Barth’s novel, Giles Goat – Boy. Productive Unity is the process in which the tendency to individuation and the tendency to connection counteract resulting in a unity in polarity. In part, Barth deals with Productive Unity by showing the intellectual development of his protagonist, George Giles. This study has traced George’s development as he moves towards a discovery and understanding of Productive Unity. Barth also treats Productive Unity in his characterization. This study has discussed characterization in terms of the characters’ attempts to distinguish between opposites in accordance with the tendency to individuation, to ignore distinctions in accordance with the tendency to connection, and to simultaneously distinguish between opposites and ignore distinctions in accordance with Productive Unity. Further, this study has examined the theme of Productive Unity as Barth develops it through his idea of cyclology.