Results 241 to 250 of about 5,070 (289)

The pulmonary arteries of the yak

Cardiovascular Research, 1984
A quantitative histological study was carried out on the pulmonary arteries of a female yak (Bos grunniens), a member of the genus Bos which comprises the various types of cattle. A characteristic feature of cattle is a muscular pulmonary vasculature which responds sensitively to alveolar hypoxia by constriction.
D, Heath, D, Williams, J, Dickinson
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Reproductive patterns of the yak. I. Reproductive phenomena of the female yak

British Veterinary Journal, 1993
The reproductive phenomena of 62 multiparous yaks from two grassland areas were investigated. The lengths of oestrus and the oestrus cycle were 12-36 h and 19-21 days respectively. Ovulation occurred 12-36 h after the end of oestrus. The oestrus and conception rates were 85.5% and 94.3%. The duration of pregnancy ranged from 248 to 258 days.
S J, Yu, Y M, Huang, B X, Chen
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Meat characteristics of Qinghai yak and semi‐wild yak

Animal Science Journal, 2006
ABSTRACTSix domestic yaks aged 6 years, comprising three culling male and three culling female yaks, from the Qinghai Lake area and three male semi‐wild yaks aged 6 months from Datong Yak Farm were used to detect the levels of amino acids, mineral elements, residual heavy metals and pesticides in yak meat.
Xiao Lin LUO, Zi Bao TONG, Ya Ping WEI, Xin Quan ZHAO   +3 more
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Yak on the Move

2016
Yak is specially adapted to high-altitude environments and is a flagship species for the Hindu Kush Himalayan (HKH) region. It plays a key role not only in agrobiodiversity conservation and maintaining high-altitude rangeland ecosystems, but also in cultural traditions, livelihood strategies, and all aspects of socioeconomic development in high ...
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YAKS AND YAK-CATTLE HYBRIDS IN ALASKA

Journal of Heredity, 1946
W T, WHITE, R W, PHILLIPS, E C, ELTING
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YAKS AND YAK-CATTLE HYBRIDS IN ASIA

Journal of Heredity, 1946
R W, PHILLIPS, I A, TOLSTOY, R G, JOHNSON   +2 more
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Yak 40

Aircraft Engineering and Aerospace Technology, 1971
ONE OF the latest, if less spectacular Russian aircraft is the Yakovlev YAK‐40 currently being produced in 10‐seat executive and 27‐seat passenger transport versions. The aircraft is of a low‐wing configuration with three rear‐mounted turbofan engines, and in terms of capacity falls mid‐way between the larger corporate types such as the Gulfstream 2 ...
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