The obtained microspheres modified pla membranes with different surface characters were proved by scanning electronic microscopy ( sem ) , clsm and stability tests . cytocompatibility tests of the microspheres modified pla membranes showed that the cytocompatibility of modified pla membranes with positive charges was better than that of modified pla membranes with negative charges or neutral surface 扫描电镜( sem ) 、激光共聚焦显微镜( clsm )以及稳定性测试分析结果反映出采用表面截留法能成功制备得到具有不同表面性质的功能微球改性聚乳酸组织工程材料表面。
The structure of fertilizers was studied by scaning electronic microscopy ( sem ) , and the nutrient release characteristics were studied using water dissolution rate method and soil column leaching method . [ result ] the 24 hours n water dissolution rates of sapcus were 18 . 22 % - 83 . 87 % , and n accumulated leaching rates in four weeks were 40 . 91 % - 65 . 38 % , which decreased by 5 . 21 % - 40 . 68 % compared with that of urea under the same experiment conditions 方法以不同类型和吸水倍率的高吸水性树脂为包膜材料,以大颗粒尿素和改性矿物包膜尿素为原料肥料,研制出高吸水性树脂单层包膜尿素、高吸水性树脂复式包膜尿素系列产品,利用电子扫描电镜研究了其结构特征,并以水中溶出率法和模拟土柱淋溶法研究其养分释放特性。