近30年来,国外的大量研究证明,在家畜日粮中添加脂肪可增加15%的增重,每公斤增重可降低饲料捎耗10—15%。在猪日粮里加入数量不多的脂肪,不仅对增重和饲料报酬显示了积极的影响,而且对胴体的品质也有良好的影响。在我国,由于油脂相对...近30年来,国外的大量研究证明,在家畜日粮中添加脂肪可增加15%的增重,每公斤增重可降低饲料捎耗10—15%。在猪日粮里加入数量不多的脂肪,不仅对增重和饲料报酬显示了积极的影响,而且对胴体的品质也有良好的影响。在我国,由于油脂相对于其他饲料来说价格较贵,使其在猪日粮中的广泛添加受到限制。因此,研究在猪的日粮中添加廉价的非常规饲料—菜油脚(rspesled ail residue),具有重要的现实意义。刘当慧等曾就猪日粮中添加菜油脚后对增重和饲料报酬的影响作了简要报道。展开更多
Stearic acid is prepared by hydrogenation of unsaturated C 18 fatty acids under atmospheric pressure from foots of rape seed oil with high activity Raney Ni catalyst.The suitable conditions are:catalyst (mass percenta...Stearic acid is prepared by hydrogenation of unsaturated C 18 fatty acids under atmospheric pressure from foots of rape seed oil with high activity Raney Ni catalyst.The suitable conditions are:catalyst (mass percentage to the raw acids) 0.6~0.8%;temperature 170~190℃;hydrogenation time 3~4h.Thus,the yield of the stearic acid reaches over 80%.展开更多
文摘近30年来,国外的大量研究证明,在家畜日粮中添加脂肪可增加15%的增重,每公斤增重可降低饲料捎耗10—15%。在猪日粮里加入数量不多的脂肪,不仅对增重和饲料报酬显示了积极的影响,而且对胴体的品质也有良好的影响。在我国,由于油脂相对于其他饲料来说价格较贵,使其在猪日粮中的广泛添加受到限制。因此,研究在猪的日粮中添加廉价的非常规饲料—菜油脚(rspesled ail residue),具有重要的现实意义。刘当慧等曾就猪日粮中添加菜油脚后对增重和饲料报酬的影响作了简要报道。
文摘Stearic acid is prepared by hydrogenation of unsaturated C 18 fatty acids under atmospheric pressure from foots of rape seed oil with high activity Raney Ni catalyst.The suitable conditions are:catalyst (mass percentage to the raw acids) 0.6~0.8%;temperature 170~190℃;hydrogenation time 3~4h.Thus,the yield of the stearic acid reaches over 80%.