设计4种日粮配方，经92d育肥，结果表明：试验1～4组平均日增重分别为244、224、167和189g，屠宰率，净肉率和眼肌面积和GR值等指标都以第一组......

Mesoporous materials typified by MCM-41 possess well-ordered mesoporous channels with controllable pore sizes from 2-30 ......