多粘菌素B血液灌流固定化纤维柱直接血液灌流(polymyxin B hemoperfusion immobilized fiber column direct hemoperfusion,PMX-DHP)的内毒素吸附治疗已用于脓毒症休克患者的治疗。内毒素是革兰氏阴性菌的外膜成分,在脓毒症休克的发病...多粘菌素B血液灌流固定化纤维柱直接血液灌流(polymyxin B hemoperfusion immobilized fiber column direct hemoperfusion,PMX-DHP)的内毒素吸附治疗已用于脓毒症休克患者的治疗。内毒素是革兰氏阴性菌的外膜成分,在脓毒症休克的发病机制中起着重要作用。内毒素触发白细胞、巨噬细胞和内皮细胞分泌各种信号级联介质,包括细胞因子和一氧化氮,导致脓毒症休克和多器官功能障碍综合征。PMX-DHP不仅直接吸附内毒素,还直接吸附单核细胞和单酰胺。它可降低血液中炎症细胞因子的水平,如白细胞介素(IL)-1、IL-6、肿瘤坏死因子-α和IL-17A、粘附分子、纤溶酶原激活剂抑制剂1和高迁移率组box-1;增加血压,降低血管活性肌力药物的剂量。PMX-DHP可以改善严重脓毒症和脓毒症休克患者单核细胞人白细胞抗原-dr的表达。本文就PMX-DHP治疗脓毒症休克的研究进展进行综述。展开更多
MCM-22 zeolite with a high SiO2/Al2O3 ratio was synthesized in the hydrothermal system of Na2O-SiO2-Al2O3-(CH2)6NH and its catalytic performance in the C4-olefins cracking reaction was investigated. It was found tha...MCM-22 zeolite with a high SiO2/Al2O3 ratio was synthesized in the hydrothermal system of Na2O-SiO2-Al2O3-(CH2)6NH and its catalytic performance in the C4-olefins cracking reaction was investigated. It was found that MCM-22 showed an excellent catalytic performance on C4-olefins cracking reaction to produce propylene. The results indicated that high temperature and high LHSV(liquid hourly space velocity) were favorable for the production of propylene with a high selectivity. Lifetime test of HMCM-22 and HZSM-5 for the cracking of C4 olefins indicates that the deactivation rate of HMCM-22 is lower than that of HZSM-5.展开更多
文摘多粘菌素B血液灌流固定化纤维柱直接血液灌流(polymyxin B hemoperfusion immobilized fiber column direct hemoperfusion,PMX-DHP)的内毒素吸附治疗已用于脓毒症休克患者的治疗。内毒素是革兰氏阴性菌的外膜成分,在脓毒症休克的发病机制中起着重要作用。内毒素触发白细胞、巨噬细胞和内皮细胞分泌各种信号级联介质,包括细胞因子和一氧化氮,导致脓毒症休克和多器官功能障碍综合征。PMX-DHP不仅直接吸附内毒素,还直接吸附单核细胞和单酰胺。它可降低血液中炎症细胞因子的水平,如白细胞介素(IL)-1、IL-6、肿瘤坏死因子-α和IL-17A、粘附分子、纤溶酶原激活剂抑制剂1和高迁移率组box-1;增加血压,降低血管活性肌力药物的剂量。PMX-DHP可以改善严重脓毒症和脓毒症休克患者单核细胞人白细胞抗原-dr的表达。本文就PMX-DHP治疗脓毒症休克的研究进展进行综述。
文摘MCM-22 zeolite with a high SiO2/Al2O3 ratio was synthesized in the hydrothermal system of Na2O-SiO2-Al2O3-(CH2)6NH and its catalytic performance in the C4-olefins cracking reaction was investigated. It was found that MCM-22 showed an excellent catalytic performance on C4-olefins cracking reaction to produce propylene. The results indicated that high temperature and high LHSV(liquid hourly space velocity) were favorable for the production of propylene with a high selectivity. Lifetime test of HMCM-22 and HZSM-5 for the cracking of C4 olefins indicates that the deactivation rate of HMCM-22 is lower than that of HZSM-5.