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饲喂复合脂肪酸酯及粪肠球菌对改善肉鸡早期肠道健康的影响 被引量:6
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作者 甘利平 李追 +1 位作者 郭双双 呙于明 《饲料研究》 CAS 2016年第23期1-8,18,共9页
试验研究复合有机酸酯(丁酸甘油酯与单月桂酸甘油酯混合物)和粪肠球菌对肉仔鸡生长性能与肠道健康状况的影响。选用840只1日龄爱拔益加(AA)雄性肉仔鸡,随机分为6组。对照组(A组)肉仔鸡饲喂玉米-豆粕型基础饲粮,B、C、D、E和F组在基础饲... 试验研究复合有机酸酯(丁酸甘油酯与单月桂酸甘油酯混合物)和粪肠球菌对肉仔鸡生长性能与肠道健康状况的影响。选用840只1日龄爱拔益加(AA)雄性肉仔鸡,随机分为6组。对照组(A组)肉仔鸡饲喂玉米-豆粕型基础饲粮,B、C、D、E和F组在基础饲粮中分别添加复合有机酸酯、金霉素、复合有机酸酯+金霉素、粪肠球菌和粪肠球菌+复合有机酸酯。试验期42 d,分别于21和35日龄时采集样品进行分析。结果表明:添加复合有机酸酯和粪肠球菌这2种添加剂对肉仔鸡的生产性能没有显著影响(P>0.05);与A组相比,D组21和35日龄肠道损伤评分显著降低(P<0.05);35日龄时,B组盲肠中沙门菌和大肠杆菌含量显著低于A组(P<0.05);C、D和E组21日龄时空肠黏膜分泌型免疫球蛋白A(SIg A)含量显著高于A组(P<0.05);相比于A和F组,D组21日龄时空肠黏蛋白(MUC)2的mRNA表达量显著提高(P<0.05);各组间回肠MUC2表达量没有显著差异(P>0.05)。综上所述,饲粮中添加复合有机酸酯和粪肠球菌虽对肉仔鸡的生长性能没有显著影响,但可改善肠道健康,尤其对早期鸡只肠道的健康生长起到促进作用。 展开更多
关键词 肉仔鸡 复合有机酸酯 粪肠球菌 肠道健康
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Study on Tribological Properties of CVT Fluid Containing Inert and Active Functional Elements 被引量:4
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作者 Li Maosheng Du Qungui 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2014年第3期92-98,共7页
The lubricating characteristics of CVTF(continuously variable transmission fluid) mixed with a multi-functional complex additive were studied. The said complex additive contained an organic borate ester and a new type... The lubricating characteristics of CVTF(continuously variable transmission fluid) mixed with a multi-functional complex additive were studied. The said complex additive contained an organic borate ester and a new type of friction improver comprising phosphorus element and poly-methylmethacrylate(PMMA), and a viscosity index improver. The viscosity-pressure characteristics were evaluated by a high-pressure quartz viscometer, and the anti-wear property was investigated by a four-ball friction tester. The mechanism of lubrication by the CVTF was studied using X-ray photoelectron spectroscopy(XPS). The results showed that CVTF T10, which contained a multi-functional complex additive, exhibited excellent properties, featuring greater solidification pressure and pressure-viscosity coefficient, improved oil film strength, and low wear value. These attributes meet the special CVTF requirements for "high friction and low wear" that make it possible to provide both traction and lubrication. The lubricating mechanism was varied using different functional elements, such as inert and active elements. Sulfur and phosphorus are active extreme pressure elements that can react on the metal friction surface and produce an extreme pressure lubrication film. Boron is an inert functional element and does not react upon the metal surface; boron is only adsorbed onto the metal surface to act as a lubricant for adsorption film and fillers. 展开更多
关键词 CVT fluid pressure viscosity characteristics high friction low wear LUBRICATION
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