以绿色溶剂乳酸乙酯作为聚合介质,研究了(甲基)丙烯酸甲酯(MMA)单体的可逆加成-断裂链转移聚合(Reversible Addition-Fragmentation Chain Transfer Polymerization,RAFT).聚合动力学研究结果表明,乳酸乙酯中甲基丙烯酸甲酯(MMA)单体的...以绿色溶剂乳酸乙酯作为聚合介质,研究了(甲基)丙烯酸甲酯(MMA)单体的可逆加成-断裂链转移聚合(Reversible Addition-Fragmentation Chain Transfer Polymerization,RAFT).聚合动力学研究结果表明,乳酸乙酯中甲基丙烯酸甲酯(MMA)单体的聚合符合RAFT聚合特征.通过对所得聚合物的分子量及分子量分布表征都说明该催化体系下(甲基)丙烯酸甲酯类单体的聚合具有良好的可控性.同时还研究了其他乳酸酯类溶剂对MMA的RAFT聚合的影响,并讨论了溶剂对所得聚合物的规整度的作用.展开更多
Sequences encoding PF4 (58-70) and TSP1 (429-459) were linked to yield a single gene TSF which encodes the fuse-protein of TSF. The gene was cloned into a pGEX-2T expression vector to generate a protein GST-TSF, which...Sequences encoding PF4 (58-70) and TSP1 (429-459) were linked to yield a single gene TSF which encodes the fuse-protein of TSF. The gene was cloned into a pGEX-2T expression vector to generate a protein GST-TSF, which was strongly expressed in E. coli. The purified GST-TSF was degraded with thrombin to generate the protein TSF. With the methods of MTT and wound repair assay, the effects of TSF on the proliferation and migration of EC were detected, respectively. The results showed that TSF significantly suppressed BAEC proliferation and migration in a dose-dependent manner. The fuse protein GST-TSF, and the peptides PF4 (58-70) and TSP1 (429-459) also inhibited BAEC proliferation and migration, respectively, but their inhibition rates were not as high as TSF. Using the CAM assay, it was shown that TSF, GST-TSF, PF4 (58-70) and TSP1 (429-459) inhibited angiogenesis in chick CAM potentially, the effect of TSF was the highest. In vivo, the growth of Lewis lung carcinoma was potently inhibited by TSF展开更多
文摘以绿色溶剂乳酸乙酯作为聚合介质,研究了(甲基)丙烯酸甲酯(MMA)单体的可逆加成-断裂链转移聚合(Reversible Addition-Fragmentation Chain Transfer Polymerization,RAFT).聚合动力学研究结果表明,乳酸乙酯中甲基丙烯酸甲酯(MMA)单体的聚合符合RAFT聚合特征.通过对所得聚合物的分子量及分子量分布表征都说明该催化体系下(甲基)丙烯酸甲酯类单体的聚合具有良好的可控性.同时还研究了其他乳酸酯类溶剂对MMA的RAFT聚合的影响,并讨论了溶剂对所得聚合物的规整度的作用.
基金This work was supported in part by the National Natural Science Foundation of China (Grant No. 39970814).
文摘Sequences encoding PF4 (58-70) and TSP1 (429-459) were linked to yield a single gene TSF which encodes the fuse-protein of TSF. The gene was cloned into a pGEX-2T expression vector to generate a protein GST-TSF, which was strongly expressed in E. coli. The purified GST-TSF was degraded with thrombin to generate the protein TSF. With the methods of MTT and wound repair assay, the effects of TSF on the proliferation and migration of EC were detected, respectively. The results showed that TSF significantly suppressed BAEC proliferation and migration in a dose-dependent manner. The fuse protein GST-TSF, and the peptides PF4 (58-70) and TSP1 (429-459) also inhibited BAEC proliferation and migration, respectively, but their inhibition rates were not as high as TSF. Using the CAM assay, it was shown that TSF, GST-TSF, PF4 (58-70) and TSP1 (429-459) inhibited angiogenesis in chick CAM potentially, the effect of TSF was the highest. In vivo, the growth of Lewis lung carcinoma was potently inhibited by TSF