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种公牛性机能调整技术
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作者 郑卫东 《农村实用技术与信息》 1994年第12期21-21,共1页
目前,出现了养牛热,特别是饲养繁殖母牛和肉牛的增多。母牛配种准胎率的高低,与种公牛配种能力的大小有很大关系;种公牛配种能力的大小,与其性机能的强弱有直接的关系;种公牛性机能的强弱又与其气质性格有关。 种公牛按其气质和性格来分... 目前,出现了养牛热,特别是饲养繁殖母牛和肉牛的增多。母牛配种准胎率的高低,与种公牛配种能力的大小有很大关系;种公牛配种能力的大小,与其性机能的强弱有直接的关系;种公牛性机能的强弱又与其气质性格有关。 种公牛按其气质和性格来分,可分为三种类型:第一种类型是气质、性格活泼型。 展开更多
关键词 种公牛 性机能调整 配种
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Mechanical Behavior of Soybean Protein Fibers
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作者 杨庆斌 孙亚宁 +1 位作者 田琳 于伟东 《Journal of Donghua University(English Edition)》 EI CAS 2009年第1期85-88,共4页
In order to understand the relationship between the mechanical property and the effect of bleaching and dyeing to the soybean protein fibers(SPF),four mechanical models are chosen.The tensile and relaxation property o... In order to understand the relationship between the mechanical property and the effect of bleaching and dyeing to the soybean protein fibers(SPF),four mechanical models are chosen.The tensile and relaxation property of the soybean protein fibers are analyzed.The tensile and relaxation curves are fitted with the suitable model.It shows that the relaxation property of SPF is in accordance with the standard linear solid model.Estimates of the Hookean spring modulus at 8% and at 10% are different,so some structural modifications could be produced by the strain.Bleached fibers show a higher level of relaxation than raw fibers and dyed fibers.Bleaching has a remarkable influence on decreasing tenacity at break for each test modality.Knotted and looped modalities decrease fiber tenacity remarkably in all three samples. 展开更多
关键词 soybean protein fiber tensile property relaxation property
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