A novel biodegradable amphiphilic copolymer based on chitosan, poly(lactide) and 1,2-dipalmitoyl-sn-glycero-3-phosphoeth......

　　Poly(lactide) (PLA) is the most extensively studied biodegradable thermoplastics derived from renewable resources fo......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......