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 36 for “"Nutritional stress"”.
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Understanding The Role Of Nutritional Stress In The Adult And Developing Zebra Finch
<p>Songbirds are particularly susceptible to stress during the sensitive period for song learning. Thus the developmental stress hypothesis (DSH) proposes that adult song reflects a male's early life environment during this period. Nutritional stress (NS) has been shown to cause deficits in song …
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Nutritional Stress & Early Development in the Neolithic Near East: A Comparison of Adult and Subadult Tooth Size
… change in diet could lead to a reliance on lower nutritional quality foods compared to the hunter-gatherer diet. Such a decline in nutritional quality could lead to an increase in nutritional stress among early agriculturalists. Stress could occur at various stages along the life course and could …
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Diet quality and season affect physiology and energetic priorities of captive Steller sea lions during and after periods of nutritional stress
… season for sea lions to recover from mild nutritional stress. These physiological findings can be used to refine bioenergetic models needed for the conservation of Steller sea lion populations.
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Infectious disease as a cause and consequence of phenotypic responses to challenge in a songbird species
… In the first experiment, I examined how nutritional stress during nestling development impacted the magnitude of house finch responses to the bacterial pathogen Mycoplasma gallisepticum (MG). Although nutritional stress limited mass gain in nestlings, individual responses to MG did not …
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Nutritional consequences of prehistoric subsistence strategies in lower Central America
… subsistence strategies and examines patterns of nutritional status of prehistoric populations that inhabited tropical coastal environments in lower Central America during the period from 5000 B.C. to A.D. 1550. The subsistence bases of archaeological populations are reconstructed using the stable …
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Influence of seasonal drought on body condition and nutritional state in selected tropical birds
… assayed for plasma lipid metabolites to examine nutritional state. The clearest evidence of elevated nutritional stress at the end of the extreme dry season came from a focal species for which longer dry seasons has a significant negative effect on population growth rates. Overall, I found mixed …
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Body size, skeletal biomechanics and habitual behaviour: a bioarchaeological approach to social and economic change in the Neolithic and Copper Age central Mediterranean
… body size, as reflective of physiological and nutritional stress, and long bone skeletal biomechanics, as reflective of habitual behaviour. This research uses metric data derived from 3D models of humeri, femora and tibiae in 17 human skeletal assemblages from across the central Mediterranean …
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A diachronic analysis of porotic hyperostosis in prehistoric populations of northern Chile
… been recognized as being a useful indicator of nutritional stress, in particular, iron-deficiency anemia. In the Americas, this pathology has primarily been associated with maize-dependency and pathogen load. Contrary to expectations, results reveal that pre-agricultural populations have 93% of …
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Structural and Functional Characterisation of the Nutrient Sensing Kinase GCN2
… factor eIF2, initiating the Integrated Stress Response. This causes the global inhibition of protein synthesis and the upregulation of stress response pathways. GCN2 has been implicated in a wide range of cellular processes in health and diseases, including the development of pulmonary …
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Behavioural and physiological responses of chacma baboons (Papio ursinus) to wildfire in the Cape Peninsula of South Africa
… high levels of psychological, energetic, or nutritional stress, as glucocorticoid concentrations were significantly lower post-fire compared to the year prior, while C-peptide concentrations were not significantly different between the two periods. The troop appears to have benefited from a …
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A Role of Intracellular Polysaccharide in the Sporulation of "Bacillus Cereus"
… intracellular polysaccharide under conditions of nutritional stress. The polysaccharide is then degraded as the organism begins sporulation. This study concerns intracellular polysaccharide and its possible involvement in sporulation as a source of carbon and energy. Procedures. Ethyl …
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Human canalization and female growth buffering with Drosophila as a model organism
… experiencing economic, environmental, and nutritional stress. Adversity, however, does not affect individuals uniformly as preferential child investment and underlying biological processes may lead to instances of differential growth outcomes among boys and girls. The causes of such …
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An isotopic and historical study of diet and migration during the great Irish Potato famine (1845-1852). High-resolution carbon and nitrogen isotope profiling of teeth to investigate migration and short-term dietary change at the Union workhouse, Kilkenny and Lukin street, London.
… bone collagen values to explore the effects of nutritional stress on bone turnover.
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An assessment of the health status of late 19th and early 20th century Khoesan
… Southern African Khoesan groups suffered from nutritional stress, as well as substandard living conditions. Such living conditions probably did not allow for health care and medical benefits at the time. It will therefore be interesting to evaluate the health status of this group through …
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Stressed Induced Changes in <i>Karenia brevis</i> Ribosomal RNA
… both ribosomal RNAs upon culturing cells under “stress” conditions, namely nutritional stress, cold shock, and decreased salinity. When the total RNA is extracted we have detected aberrant rRNA bands on the microcapillary electrophoresis BioAnalyzer (Agilent, Inc.) Interestingly when stressed, …
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Yeast Ataxin-2 (Pbp1) Condensates Regulate TORC1 Activity and Autophagy in Response to Cellular Redox State
… protein that has earlier been implicated in stress granule formation, RNA biology, and neurodegenerative disease. However, the normal endogenous function of Pbp1 and ataxin-2 remains poorly understood. In this dissertation, I identified Pbp1 as a dedicated regulator of TORC1 signaling and …
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Biological factors influencing the nature of goat skins and leather
… of these components in the skin. Under different nutritional conditions only the fat content of skins varied significantly, being higher in skins of animals on a high plane of nutrition. The GAG contents of low nutritional skins were slightly higher than the corresponding high nutritional skins. A …
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Role of Tyk2 in the Development of Beige Cells
… in beige cell development is bypassed during nutritional stress, a stimulus of the sympathetic response.
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Who Cares? How Caregivers Influence Communicative and Cognitive Development During Early Childhood
… is a particularly intense period of risk for nutritional stress and mortality in humans, but AMC can help reduce this risk by supplementing the infant’s energy needs through food sharing. However, before age two, infants are not yet highly capable communicators. Thus, infants face a challenge …
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Environmental bacteriophages infecting Dickeya and Serratia species: receptors and diversity
… the capsule genes are expressed in response to nutritional stress, however disruption of the capsular polysaccharide cluster did not significantly impact virulence. Experiments assessing capsular polysaccharide as a putative receptor for Ackermannviridae family phages in nosocomial pathogen …
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