共查询到20条相似文献,搜索用时 59 毫秒
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共轭亚油酸(CLA)是亚油酸的一组位置和构象的同分异构体,普遍存在于反刍动物性食品如牛奶、奶酪、牛肉、羊肉及脂肪中。20世纪70年代末,MichaelPariza在寻找肉中诱导有机体突变物质时,偶尔发现共轭亚油酸。1985-88年共轭亚油酸的抗肿瘤作用陆续得到实验证实,由此引发了人们的研究兴趣。1993年Cook等人通过小鼠研究发现,共轭亚油酸能增强机体的免疫能力,减少由于免疫应激所引起的分解反应;1996年MichaelPariza等人又发现,共轭亚油酸具有减少脂肪沉积的作用;1997年Nicolosi等人发现,共轭亚油酸具有抗动脉粥样硬化作用;1998年Houseknecht等… 相似文献
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Böhm R 《DTW. Deutsche tier?rztliche Wochenschrift》2000,107(8):305-310
Water plays an important roll in the epidemiology of a lot of infectious diseases. Groundwater as well as surface water contains generally microorganisms of several species, which cannot always differentiated properly in autochthonous flora and contaminants with health significance. Sources of bacterial or viral contaminants may be feces from man and/or animals but with different counts in ground and surface water. With respect to water used for supplying farm animals it is stated that it must have initially drinking water quality. Since it generally looses this quality in this supply system the following requirements shall be met: Free of Salmonellas and/or Campylobacter in 100 ml, no E. coli in 10 ml, total bacterial count at 37 degrees C less than 1000 cfu/ml and total bacterial count at 20 degrees C less than 10,000 cfu/ml. 相似文献
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Karanis P 《DTW. Deutsche tier?rztliche Wochenschrift》2000,107(8):311-315
Human- and veterinary important parasites of the subkingdom of protozoans and helminths infect humans and animals by ingestion of parasites in contaminated water. The parasites are excreted from the body of infected humans, livestock, zoo animals, companion animals or wild animals in the feces. Recreational waters, agricultural practices and wild animals serve as vehicles of transmission of the parasites in the water supplies. The following topics are addressed: a) the life cycles of parasitic diseases-causing agents with proven or potential transmission via water b) the development and the current research status of the analytical techniques for the detection of parasitic diseases-causing agents from water c) the occurrence of Cryptosporidium and Giardia in surface water supplies and in treated water d) the possible water sources and transmission ways of the parasites into the water supplies e) the behaviour and the possibilities for the removal or elimination of the parasites by water treatment. 相似文献
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Dependent on the species, feedstuffs and plants differ considerably in their iodine content. Among the I-poorest feedstuffs there are grain concentrates, extracted soybean and rapeseed oil meals, mixed feed (without I-containing mineral mixture) and grasses. The I content of the plants decreases with proceeding growth. The I intake of ruminants via vegetable feed and drinking water is affected by the distance of the site from the seaside and the geological origin of the soil material. Ruminants get considerably less iodine via feedstuffs and water in the southern territory of the GDR than in the central and northern areas. Therefore, mineral mixtures for cattle and sheep are supplemented with 18 mg KIO3 per kg mixture in the southern districts. The I analysis of 205 charges of mineral mixtures revealed only a mean I content of 7 (3.8-11.3) mg per kg mixture. 相似文献
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中草药饲用添加剂应用于畜禽的研究 总被引:14,自引:0,他引:14
近年来 ,天然中草药植物添加剂由于无抗生素类药物的一些普遍弊病而逐步引起人们的关注。实践证明 ,天然中草药植物添加剂与抗生素类添加剂竟相媲美 ,且具有抗生素不可替代的功能。迄今为止 ,至少已有 2 0 0余种中草药运用于养殖业 (冯强等1996 ,张兆华 1997)。然而 ,传统经验和近年来的试验仅仅停留在饲养效果的研究水平 ,对天然中草药植物中活性成分及其作用机理认识不够。就目前试验研究表明 ,天然中草药植物中有效成分极为复杂 ,其作用主要有以下几个方面 :增强免疫功能 ,提高抗病力 ;抑菌抗病毒作用 ;增进食欲 ,提高营养物质的利用和促… 相似文献