Hypertrophy of the pyloric muscle in gastric ulceration

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The value of sialography in the diagnosis of parotid tumours

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Biochemical investigation of the nutrition status of urban school children aged 12 -15 years: Protein status

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Biochemical evaluation of the nutrition status of Urban Primary school children: riboflavin status

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Biochemical evaluation of the nutrition status of urban primary school children: Vitamin-A status

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Biochemical evaluation of the nutrition status of urban school children of 12-15 years - riboflavin status

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The effect of barley, millet (a Yati-Pennisetum sp.) and lucerne meal in bacon production

Three rations were compared with the standard maize-meat meal ration when fed to baconers. Excellent gains were made on all the rations, the pigs on the millet and barley rations, however, making the best gains, but these lots also consumed the largest amounts of food daily. The difference in rate of growth slightly influenced the degree of fatness of the pigs, otherwise there were no significant differences in the carcase measurements of the pigs in the four lots. The fat appeared to be firmer than that of pigs of previous trials which had similar rations. Type of pig may have caused this difference. The grading was good and the rate of gain had no adverse influence, so that it appears that different types of pigs have different optimum growth rates for the production of first grade bacon. The standard maize-meat meal ration again proved to be the most economical in bacon production.The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

Social facility planning: comparing accessibility in Tshwane based on different transport networks

Papers presented virtually at the 41st International Southern African Transport Conference on 10-13 July 2078Detailed transport networks providing distance or time measurements are a common way to measure levels of spatial accessibility. An often-overlooked matter is that using a single transport network does not consider how different portions of the population may depend on different modes of transportation. This means the actual accessibility of facilities would be overestimated since one would assume commuters travelling with a private vehicle in cities within developing countries like South Africa would take less time and have greater access to facilities than those using public transportation. A matter to consider is that most accessibility analyses have not focused on classifying the population based on the mode of transport that they would mostly depend on. A tool developed by the CSIR to determine spatial accessibility was used to illustrate this. This research thesis compares the spatial accessibility of social facilities based on different modes of transportation (private vehicle; bus; rail and taxi). An impedance unit was applied to each of the modes of transport reflecting how far one may have to travel from their origin to reach the nearest node or stop. It was found that there is a significant disparity in terms of the spatial accessibility of certain social facilities for the estimated population in the City of Tshwane. A much larger proportion of Tshwane’s population has access to the facilities included in the research if they have access to private transportation as compared to public transport services. Subsequently, suggestions were made to address the matter at hand, including the extension of the public transport networks, the establishment of more social facilities or the relaxation of the standards used to determine how far is reasonable for residents to travel to reach their nearest facility

Conservation agriculture farming systems in rainfed annual crop production in South Africa

South Africa is, relative to the rest of the world, a water scarce country with a limited amount of arable land, especially land with a long-term sustainable agricultural production potential. Agriculture should therefore focus on the implementation of soil and water conservation systems. Soil conservation is administered in the South African legislation under the Conservation of Agricultural Resources Act 43 of 1983. The objective of this paper is to summarise Conservation Agriculture (CA) systems practiced in South Africa. These include measures to control wind and water erosion as well as soil compaction through implementation of rip on the row, vertical mulching, controlled traffic, crusting control, mulching, water harvesting and crop rotation. No-tillage is not in the scope of this paper, although aspects of reduced and minimum tillage are covered. Integrating these with existing farming systems could be complex and should be considered with great care. It is proposed that CA specialists should be trained to assist farmers in the selection, adoption and implementation of appropriate CA systems.http://www.tandfonline.com/loi/tjps20hj2022Plant Production and Soil Scienc

Nonperturbative renormalization group approach to frustrated magnets

This article is devoted to the study of the critical properties of classical XY and Heisenberg frustrated magnets in three dimensions. We first analyze the experimental and numerical situations. We show that the unusual behaviors encountered in these systems, typically nonuniversal scaling, are hardly compatible with the hypothesis of a second order phase transition. We then review the various perturbative and early nonperturbative approaches used to investigate these systems. We argue that none of them provides a completely satisfactory description of the three-dimensional critical behavior. We then recall the principles of the nonperturbative approach - the effective average action method - that we have used to investigate the physics of frustrated magnets. First, we recall the treatment of the unfrustrated - O(N) - case with this method. This allows to introduce its technical aspects. Then, we show how this method unables to clarify most of the problems encountered in the previous theoretical descriptions of frustrated magnets. Firstly, we get an explanation of the long-standing mismatch between different perturbative approaches which consists in a nonperturbative mechanism of annihilation of fixed points between two and three dimensions. Secondly, we get a coherent picture of the physics of frustrated magnets in qualitative and (semi-) quantitative agreement with the numerical and experimental results. The central feature that emerges from our approach is the existence of scaling behaviors without fixed or pseudo-fixed point and that relies on a slowing-down of the renormalization group flow in a whole region in the coupling constants space. This phenomenon allows to explain the occurence of generic weak first order behaviors and to understand the absence of universality in the critical behavior of frustrated magnets.Comment: 58 pages, 15 PS figure