نتایج جستجو برای: elephant
تعداد نتایج: 5154 فیلتر نتایج به سال:
How to improve the efficiency of local subcontractor management in the Indian projects of China Petroleum Pipeline Bureau (CPP) is the center of this thesis. Based on the introduction of background and the analysis of reasons, this thesis puts forward a new management mode that combines “tame elephant”, “huge stick”, and “candies & sweet epithets” based on the “elephant-training artifice”, and ...
The gonads, both ovaries and testes, of 44 elephant fetuses weighing 0.09-112 kg (6.1-21.3 months gestation) were examined grossly and histologically. As in equids, elephant fetal gonads undergo a phase of marked growth and enlargement during the second half of gestation, which is more pronounced in ovaries than testes due to growth and antrum formation of numerous follicles in the former. Stro...
Information on the ovarian follicle reserve in the African elephant (Loxodonta africana) is lacking. This study set out to determine the ratios of early preantral follicles and their relative dimensions in the ovaries of 16 African elephant aged 10-34 years. The ovaries were sectioned histologically. Follicles were counted and classified according to expansion of the pre-granulosa cells. Early ...
As part of an ongoing effort to understand the biological response of wild and domestic ungulates to different environmental pollutants such as dioxin-like compounds, cDNAs encoding for CYP1A1 and CYP1A2 were cloned and characterized. Four novel CYP1A cDNA fragments from the livers of four wild ungulates (elephant, hippopotamus, tapir and deer) were identified. Three fragments from hippopotamus...
The northern elephant seal almost became extinct in the late 1800’s following harvesting by whalers and sealers for their blubber which contains oil. A small colony of between 20 and 100 individuals survived on Guadalupe Island off Baja California. From that small colony have come the approximately 160,000 elephant seals found on the Pacific coast today. That dramatic shrinking of the populatio...
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