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1. Effects of exogenous metallothionein on several endocrine hubs of dairy cattles | |||
Wu Lizhuan,Chen Haiyan,Zhang Bin,Li Lili,Xiao Bingnan,Chen Yuguang,Xiao Dingfu,Luo Jiajie,Wu Zongming | |||
Animal Husbandry, Veterinary Medicine 26 January 2010 | |||
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Abstract:To approach the effects of exogenous metallothionein (Zn-MT) on endocrine hubs of dairy cattles on the low-grade thermal stress, an experiment was conducted with 24 lactating cows, who were randomly allocated to groups A, B, C and D, and supplemented with 0, 6.0, 12.0 and 16.0mg Zn-MT•capita-1, respectively, by intravenous injection. The results showed that: The corrected milk yields in groups B, C and D were higher than those in groups A (P<0.05or P<0.01), the fat percentages of milk was improved significantly (P<0.05). The secretory capacity of INS in control group was lower than in experimental groups, especially in group B in 30d(P<0.01); the secretory capacity of IGF-Ⅰand T3 in groups B, C and D were higher than those in groups A (P<0.05or P<0.01), and in 45d, the same capacity in group C was the highest among all these numbers. The FSH in groups B and C constantly maintained low level, but the range of variation of FSH in group A was 4 times as same as in group C; The secretory capacity of Prog and E2 in experimental groups were higher than those of group A in anaphase (30~45d)(P<0.05); and the PRL in groups B, C and D were higher significantly than those in groups A (P<0.01), and the effect was faint in anaphase (P>0.05). Exogenous Zn-MT had the best effects on the thermoresistance of diary cattle 12.0mg•capita-1 by intravenous injection every 30~45 days. On one hand, the speed of catabolism and quantity of heat production in bodies were reduced by Zn-MT through adjusting secretory volume of endocrine hormone which is related to energy metabolism, on the other hand, to approach the healthful effects of thermoresistance, the gonadal hormones were controlled amplitude of variation, and on the same time, the secretory volume of PRL was improved by Zn-MT, which resulted in physiological status which was varied on balance for diary cattle. | |||
TO cite this article:Wu Lizhuan,Chen Haiyan,Zhang Bin, et al. Effects of exogenous metallothionein on several endocrine hubs of dairy cattles[OL].[26 January 2010] http://en.paper.edu.cn/en_releasepaper/content/39410 |
2. Numerical simulation of inspiratory airway in nasal cavity of Bactrian camels (Camelus bactrianus) | |||
Wang Hongju,Bai Zhongtian ,Wang Jianlin ,Gao Chengjuan | |||
Animal Husbandry, Veterinary Medicine 27 September 2008 | |||
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Abstract:To investigate the flow patterns in nasal cavity of Bactrian camel (Camelus bactrianus), we construct an anatomically accurate finite element model of its left nasal cavity from CT scans of a healthy adult nose. By numerically solving the steady-state Navier-Strokes and continuity equations, we study the flow distribution and the complete velocity field for inspiration throughout the nasal cavity under physiological flow rates of breathing. During inspiration, the highest velocity occurred along the nasal floor. | |||
TO cite this article:Wang Hongju,Bai Zhongtian ,Wang Jianlin , et al. Numerical simulation of inspiratory airway in nasal cavity of Bactrian camels (Camelus bactrianus)[OL].[27 September 2008] http://en.paper.edu.cn/en_releasepaper/content/24420 |
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