山西近1/3奶牛饲养户亏本

国家统计局山西调查总队7月25日公布的调查数据显示,因成本、价格等原因,目前山西省近1/3的奶牛饲养户已处于亏本状态。调查显示,目前成年母牛头均年鲜奶销售纯收入从2006年上半年的2000多元下降到1000元左右,奶牛     

猪市延续疲软态势,微利经营将成新常态——2015年上半年将走出亏损,下半年或将有大的反弹

<正>当前出栏积极,短期上行乏力冬季本来就是猪肉的传统消费旺季,南方地区历来又有腌制腊肉和灌制香肠的习惯,加之元旦、春节因素的叠加效应,因此,每年这个时候由于季节性消费需求的迅速增加,必然带动猪价的快速攀升,可2013年以来这个延续了多年的规律被打破了。2014年本应是拐点之年,按理说无论如何也应进入上行通道,可直至当前全国猪市表现仍然平平。业内人士分析认为,当前猪价走势偏弱,养殖户心理预期被打破,开始陆     

Effects of endotoxin,interleukin‐1/3 and prostaglandin injections on fever response in broilers

1. The effect of endotoxin, interleukin‐1β and prostaglandin on fever response was studied in 80 broilers (Hubbard strain). Endotoxin (E. coli, LPS) was injected iv (1.5 μg/kg) and icv (1.5 μg/bird); interleukin‐1 (human recombinant IL‐1β, 80 pg/bird) and prostaglandin E₂ (5 μg/bird) were injected icv. Indomethacin (10 mg/kg, iv) pretreatment was also used before iv endotoxin injection.

2. The results showed that indomethacin was able to block the fever response induced by iv endotoxin injection, and IL‐1β and PGE₂ were both effective in producing fever when injected icv. These data suggest a prostaglandin‐mediated fever response by broilers, and also a strong evidence of the involvement of endogenous pyrogen (interleukin‐1) in fever response in birds.     

哈尔滨大白兔红细胞酯酶(Es-1,Es-2和Es-3)的遗传多态性

利用垂直板型聚丙烯酰胺凝胶电泳法,对76只(雌24,雄52)哈尔滨大白兔红细胞酯酶的遗传多态性进行了研究.结果表明,红细胞酯酶Es-1,Es-2和Es-33个位点各有3种不同的表型AA、AB和BB,它们分别受常染色体上的1对等显性基因A、B控制.各位点的A基因频率分别为0.2829、0.5724和0.5329,B基因频率分别为0.7171,0.4276和0.4671.3个位点的杂合度分别为0.4057,0.4895和0.4978,平均杂合度为0.4643.经X~2检验,这3个位点的基因分布均处于Hardy-Weibery平衡状态(P>0.05).