In early studies histological methods were largely empirical and thus unequal to the demonstration of changes that must have existed in the tissues of animals on deficient diets. Thus, although Willcock & Hopkins (1906) did not observe any histopathological changes in the young tryptophan-deficient mice used in their classical experiments, moribund adult rats maintained on a tryptophan-deficien...

this study was undertaken to identify morphological changes in young seedlings of 5 iranian almond species (prunus dulcis, p. eburnea, p. eleagnifolia, p. haussknechti, and p. scoparia) under polyethylene glycol-induced drought stress. drought stress caused a significant reduction in plant growth parameters such as fresh and dry weights of plant organs, leaf number, total leaf area, and leaf re...

identification and regulation of distribution of mineral nutrients between source and sink members is beneficial in improvement of growth and development of fruit trees. the aim followed in this study was an evaluation of the effects of urea and znso4 on storage and translocation of nitrogen and zink in the leaf and fruits of pomegranate cv ‘rabab-e-neyriz’. in 2009, znso4 (0.0, 0.3%, 0.6%) was...

By regulating the nutritional level of young animals in postembryonic period, it is possible to change growth rate animals, forming meatiness and ratio most important tissues carcass. The aim work was establish influence different levels on growth, development, meat productivity Black Pied cattle ages. scheme growing as follows: group 1– increased up 14 months age; 1-a – were grown same way 1 8...

background: taxus species are important due to their content of taxol, baccatin iii, 10- deacetyl baccatin and other taxoids suitable to change to active pharmaceutical ingredients, which are used as anti-neoplastic agents. investigations on taxoids carried out during the past four decades, resulted in identification of more than 350 taxoids. objective: this study aimed to isolate and identify ...

A single germinated rice (Oryza sativa L) seed can produce 350 grains with the sequential development of 15 leaves on the main stem and 7-10 leaves on four productive tillers (forming five panicles in total), using nitrogen (N) taken up from the environment over a 150-day growing season. Nitrogen travels from uptake sites to the grain through growing organ-directed cycling among sequentially de...