Environmental monitoring plays an important role in the development of environmental protection work. Environmental monitoring provides favorable basis for China's environmental law enforcement and governance. Thi...Environmental monitoring plays an important role in the development of environmental protection work. Environmental monitoring provides favorable basis for China's environmental law enforcement and governance. This paper analyzes the current situation of environmental monitoring in environmental protection projects and discusses the effective measures to improve the level of environmental monitoring.展开更多
针对葛沽片区市政设施发展现状进行调研,分析片区碳排放影响因素,建立碳排放评估模型,评估预测片区的碳排放,确定片区未来发展的碳减排约束目标,并挖掘潜在提升的领域,统计分析片区内的道路工程、桥涵工程、交通工程、雨水工程、污水工...针对葛沽片区市政设施发展现状进行调研,分析片区碳排放影响因素,建立碳排放评估模型,评估预测片区的碳排放,确定片区未来发展的碳减排约束目标,并挖掘潜在提升的领域,统计分析片区内的道路工程、桥涵工程、交通工程、雨水工程、污水工程和绿化碳汇工程等,以减少碳排放。结果显示:采用低碳技术的低碳情景比现状建设方案的基准情景的碳排放量降低18.8%,满足降碳目标值15%的要求;到2028年,低碳情景下的碳排放量预计362 679.28 t,片区人均碳排放2.68 t CO_(2);2029~2035年进入运行阶段,结合片区内人口规模变化等因素,呈现先增大后减小的趋势,并在2032年达到运行阶段的峰值,其碳排放量为54 099.19 t,片区人均碳排放0.36 t CO_(2),采用低碳技术和措施的低碳情景比运行阶段的基准情景的碳排放量降低19.8%。展开更多
Currently available commercial nerve guidance conduits have been applied in the repair of peripheral nerve defects.However,a conduit exhibiting good biocompatibility remains to be developed.In this work,a series of ch...Currently available commercial nerve guidance conduits have been applied in the repair of peripheral nerve defects.However,a conduit exhibiting good biocompatibility remains to be developed.In this work,a series of chitosan/graphene oxide(GO)films with concentrations of GO varying from 0-1 wt%(collectively referred to as CHGF-n)were prepared by an electrodeposition technique.The effects of CHGF-n on proliferation and adhesion abilities of Schwann cells were evaluated.The results showed that Schwann cells exhibited elongated spindle shapes and upregulated expression of nerve regeneration-related factors such as Krox20(a key myelination factor),Zeb2(essential for Schwann cell differentiation,myelination,and nerve repair),and transforming growth factorβ(a cytokine with regenerative functions).In addition,a nerve guidance conduit with a GO content of 0.25%(CHGFC-0.25)was implanted to repair a 10-mm sciatic nerve defect in rats.The results indicated improvements in sciatic functional index,electrophysiology,and sciatic nerve and gastrocnemius muscle histology compared with the CHGFC-0 group,and similar outcomes to the autograft group.In conclusion,we provide a candidate method for the repair of peripheral nerve defects using free-standing chitosan/GO nerve conduits produced by electrodeposition.展开更多
文摘Environmental monitoring plays an important role in the development of environmental protection work. Environmental monitoring provides favorable basis for China's environmental law enforcement and governance. This paper analyzes the current situation of environmental monitoring in environmental protection projects and discusses the effective measures to improve the level of environmental monitoring.
文摘针对葛沽片区市政设施发展现状进行调研,分析片区碳排放影响因素,建立碳排放评估模型,评估预测片区的碳排放,确定片区未来发展的碳减排约束目标,并挖掘潜在提升的领域,统计分析片区内的道路工程、桥涵工程、交通工程、雨水工程、污水工程和绿化碳汇工程等,以减少碳排放。结果显示:采用低碳技术的低碳情景比现状建设方案的基准情景的碳排放量降低18.8%,满足降碳目标值15%的要求;到2028年,低碳情景下的碳排放量预计362 679.28 t,片区人均碳排放2.68 t CO_(2);2029~2035年进入运行阶段,结合片区内人口规模变化等因素,呈现先增大后减小的趋势,并在2032年达到运行阶段的峰值,其碳排放量为54 099.19 t,片区人均碳排放0.36 t CO_(2),采用低碳技术和措施的低碳情景比运行阶段的基准情景的碳排放量降低19.8%。
基金supported by the National Natural Science Foundation of China, No. 81871493 (to YC)the Medical Science Advancement Program (Clinical Medicine) of Wuhan University, No. TFLC2018003 (to YC)
文摘Currently available commercial nerve guidance conduits have been applied in the repair of peripheral nerve defects.However,a conduit exhibiting good biocompatibility remains to be developed.In this work,a series of chitosan/graphene oxide(GO)films with concentrations of GO varying from 0-1 wt%(collectively referred to as CHGF-n)were prepared by an electrodeposition technique.The effects of CHGF-n on proliferation and adhesion abilities of Schwann cells were evaluated.The results showed that Schwann cells exhibited elongated spindle shapes and upregulated expression of nerve regeneration-related factors such as Krox20(a key myelination factor),Zeb2(essential for Schwann cell differentiation,myelination,and nerve repair),and transforming growth factorβ(a cytokine with regenerative functions).In addition,a nerve guidance conduit with a GO content of 0.25%(CHGFC-0.25)was implanted to repair a 10-mm sciatic nerve defect in rats.The results indicated improvements in sciatic functional index,electrophysiology,and sciatic nerve and gastrocnemius muscle histology compared with the CHGFC-0 group,and similar outcomes to the autograft group.In conclusion,we provide a candidate method for the repair of peripheral nerve defects using free-standing chitosan/GO nerve conduits produced by electrodeposition.
