- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 291 to 300 of 2284 (0.039 seconds)| 291 |
Shade-light mediated responses in Nicotiana tabacum and other speciesAdams, J. W. January 1982 (has links)
No description available.
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| 292 |
An investigation into the growth and early development of the ormer, Haliotis Tuberculata LPeck, L. S. January 1983 (has links)
No description available.
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| 293 |
Studies on the production and secretion of catabolin-like activity by porcine synovial tissueQi, E. January 1984 (has links)
No description available.
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| 294 |
Interactions between the thyroid, stress and the immune system of the domestic fowl (Gallus domesticus)Williamson, R. A. January 1986 (has links)
The involvement of the thyroid hormones and corticosterone in the response to stressors, the influence of these hormones on the immune system and their possible role in the stress-induced changes in immune function, were investigated. Food and/or water deprivation, food restriction, exposure to heat or cold, all influenced serum thyroid hormone concentrations. Changes in food intake probably influenced serum concentrations of T3 and kT4 by reducing extrathyroidal 5 and 5' monodeiodination of T4. The effects on thyroid hormone concentrations, of heat, and possibly also cold and deprivation of water, were in part mediated by food intake. Deprivation of food or water, food restriction and cold all cause increases in circulating corticosterone. Though corticosterone influenced thyroid function in unstressed birds, it did not mediate the effects of underfeeding on serum T3 and T4. Circulating corticosterone was not increased during heat exposure, though changes in other physiological variables indicated a severe stress. It is concluded that circulating corticosterone cannot be relied upon as the sole index of stress. Thyroid hormones did not markedly affect humoral immunity, whereas corticosterone suppressed antibody production, probably by reducing T-helper cell function. Both thyroid hormones and corticosterone influenced cell-mediated immunity as evinced by changes in lymphoblastogenic responses to PHA and Con A. Food restriction, heat exposure and social stress suppressed PHA and/or Con A responses. However, these effects were not accounted for by the observed changes in thyroid hormones or corticosterone. It is concluded that although the thyroid hormones and corticosterone can influence cell-mediated immunity in unstressed birds, they are not directly responsible for the immuno-suppression associated with food restriction, heat or social stress.
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| 295 |
Factors affecting insecticide resistance in the yellow fever mosquito Aedes aegypti (L)Bainbridge, C. A. January 1983 (has links)
No description available.
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| 296 |
Aspects of the biology of fish parasites, with emphasis on Anisakis simplex (Rudolphi, 1809) (Nematodia : Ascaridoidea)Smith, J. W. January 1984 (has links)
No description available.
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| 297 |
Effects of water stress on the physiology and low temperature behaviour of cultured plant cellsPritchard, H. W. January 1982 (has links)
No description available.
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| 298 |
A study of the mechanisms of resistance to inflammatory stimuli in Wistar ratsDe'Brito, F. B. January 1983 (has links)
No description available.
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| 299 |
Heterogeneity of presynaptic alpha-adrenoceptors in rat atriaDutta, C. F. January 1983 (has links)
No description available.
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| 300 |
Effector mechanisms in African swine feverNorley, S. G. January 1983 (has links)
No description available.
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