Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"pattern of distribution"”.
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Distribution and biomass of epiphytic seaweeds on the kelp Ecklonia maxima (Osbeck) Papenfuss, and the potential effects of two kelp-harvesting methods in the Western Cape
… that the present demand may exceed the amount of E. maxima available, if the traditional method of harvesting continues (cutting the whole kelp plant off, just above the holdfast). There is also evidence that, although the kelp beds recover in 2 - 3 years, and are ready for the next harvesting …
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Distribution and mixture of Cape and Cunene horse mackerel, Tachurus capensis and Tracherus trecae in the Angola-Benguela front in relation to environmental and other factors
This thesis makses an analysis of survey data of horse mackerel catch per unit effort and acoustics data from R/V Dr. Fridtjof Nansen over twelve years in the region of the Angola-Benguela front. The main objectives are: to characterize the pattern of distribution and mixture of Cunene and Cape …
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Parowan Pottery and Fremont Complexity: Late Formative Ceramic Production and Exchange
… issues that are not ecological, the organization of production and exchange of ceramic vessels. Following criteria suggested by Brown et al. (1990), I argue that the following need to be addressed prior to a useful discussion of intergroup trade: the source of the raw materials of the exchanged …
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Spatial distribution of tuberculosis in Nigeria and its socioeconomic correlates
… burden countries with an estimated prevalence of 338/100,000 population. Few studies have utilized spatial data analysis techniques in the understanding of the pattern of distribution and possible correlates of TB especially in Africa. This study examines the spatial distribution of TB and its …
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The influence of aerobic fitness on cerebral white matter integrity and cognitive function in older adults: results of a one-year exercise intervention
… the expected rise in the number and proportion of older adults in the United States, it is imperative to identify lifestyle factors that can counteract the deleterious effects of aging. Research has shown that cardiovascular fitness and exercise are effective as protective, even restorative, …
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Distribution of neuropeptides and neurotransmitters and their effects on insulin and glucagon secretion in normal and diabetic rat pancreas
… This is usually coupled with abnormal regulation of other pancreatic hormones because of the loss of the effects of insulin (INS) on the other pancreatic hormones such as glucagon (GLU), somatostatin (SUM) and pancreatic polypeptide (PP). The prime aim in the management of diabetes is to increase …
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Effect of progesterone on secretagogue-evoked secretory responses in the isolated pancreas
The study investigates the effect of the neurotransmitter acetylcholine (ACh), the gut hormone, cholecystokinin-octapeptide (CCK-8) and the steroid hormone, progesterone on amylase release and preliminary data on ion (potassium (K), sodium (Nat), magnesium (Mg 2+) and calcium (Ca 2+) transport in …
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Interactions of islet hormones with acetylcholine and cholecystokinin-octapeptide in the isolated pancreas of normal and diabetic rats
This study investigates the effects of the neuropeptides, vasoactive intestinal polypeptide (VIP) and galanin, the islet hormones insulin, glucagon and somatostatin, the neurotransmitter acetyicholine (ACh), the gut hormone cholecystokinin octapeptide (CCK-8), sodium nitroprusside (SNIP), 8-Bromo …
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Spatial patterns of wheat grain composition in relation to nutritional quality and processing properties
The quality of wheat-based food. products, especially bread quality, is significantly affected by the characteristics of the wheat flour, both in term of processing quality and nutritional value. White flour, by far the most used flour in breadmaking, derives from grinding of the grain starchy …
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Prevalence of Malaria in pregnancy in Kaoma District
The study to determine the prevalence of malaria in pregnancy, its associated factors, and its pattern of distribution (geographical) was carried out in thirteen (13) health facilities of Kaoma district, the largest of the seven districts in the Western province of Zambia.The district had …
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Prevalence of Malaria in pregnancy in Kaoma District
The study to determine the prevalence of malaria in pregnancy, its associated factors, and its pattern of distribution (geographical) was carried out in thirteen (13) health facilities of Kaoma district, the largest of the seven districts in the Western province of Zambia.The district had …
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The comparative ecology of Minuartia verna (L.) Hiern and Thlaspi alpestre L. in the southern pennines, with special reference to heavy metal tolerance.
… alpestre L. are recognized as relict elements of a preglacial montane flora in the British Isles and, as such, display a markedly disjunct distribution pattern. Their present-day distribution shows a close association with metalliferous mine workings, particularly in the Pennines, where both …
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Radiation-induced changes in the export of photoassimilated carbon /|nBarry Jess Shelp. -- 260 0 St. Catharines, [Ont. : s. n.],
Low levels of ionizing radiation induce two translocation responses in soybean: a reduction in photoassimilate export from leaves and a change in the distribution pattern of exported photoassimilate within the plant. In this investigation these responses have been further studied specifically to …
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Physiological, Morphological and molecular biological studies of the effect of Glucagon-like peptide-1 and exenatide in the diabetic rat pancreas
… over 225 million people worldwide. It is often described as a major metabolic disorder, which can result in numerous long-term complications including retinopathy, nephropathy, neuropathy and cardiomyopathy. DM is due to a deficiency of insulin or insulin resistance. Of the 225 million …
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Characterisation of anterior patterning genes in the staghorn coral, Acropora millepora(Cnidaria; Anthozoa; Scleractinia)
… molecular mechanisms underlying many aspects of development are conserved across the higher (bilateral and triploblastic) Metazoa, but the degree to which similar mechanisms apply to non-bilateral and diploblastic animals such as cnidarians is unclear. The aim of this thesis was to …
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Cellular Mechanisms Underlying the Action of Melatonin in the Suprachiasmatic Nucleus
… Melatonin phase advances the circadian rhythm of the activity of the SCN neurons when administered at specific times of the day. This effect is more pronounced at dusk. Also melatonin inhibits spontaneous firing of SCN neurons. However the cellular mechanisms underlying the effects of melatonin …
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Analysis of the ecological principles underpinning forest landscape restoration: a case study of wood cricket (Nemobius sylvestris) on the Isle of Wight (UK).
… are increasingly focussing on the creation of habitat networks in order to increase woodland cover and connectivity. However, the basic assumptions underpinning such strategies are largely untested for species associated with woodland habitat. For many woodland invertebrate species, local …
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TUBULE DENSITY, MOISTURE CONTENT AND MECHANICAL PROPERTIES OF DONKEY HOOF HORN
… for the collection, storage and preparation of donkey hoof horn samples prior to their subsequent analysis. Using these methods, normal values for moisture content, tubule density and mechanical properties for donkey hoof horn were established. Novel methods for investigating regional …
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Spatial Ecology and Remote Sensing in the Precision Management of Tetranychus urticae (Acari: Tetranychidae)in Peanut
… Virginia-Carolina area, where approximately 20% of the peanuts are produced annually in the United States. Peanut farmers depend on pesticides to control mite populations. Because TSSM has developed resistance to many acaricides and there are restrictions on the use of pesticides, an alternative …
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