微生物胞外电子传递(Extracellular electron transfer,EET)在地球生物化学循环、生态修复、废水处理以及资源再生等领域发挥着重要作用.自然界中胞外电子传递的界面性质各异,导致反应速率和效率明显不同.本文介绍了胞外电子传递过程涉...微生物胞外电子传递(Extracellular electron transfer,EET)在地球生物化学循环、生态修复、废水处理以及资源再生等领域发挥着重要作用.自然界中胞外电子传递的界面性质各异,导致反应速率和效率明显不同.本文介绍了胞外电子传递过程涉及的无机物-微生物界面和有机物-微生物界面,总结了反应物表面性质与微生物的互作规律:反应物表面的氧化还原活性决定其电子接受/释放能力,从根本上影响胞外电子传递发生的可能性;微生物与反应物之间的氧化还原电势差决定了电子传递方向;表面电荷、润湿性、表面粗糙度、孔隙度和生物相容性综合影响微生物在固体表面的吸附、粘附、生物膜生长及活性,从而影响胞外电子传递的效率;导电性影响电子传输速率.本综述旨在通过对比各种反应界面,认识不同反应物界面间的共性与特性.这些认识有助于系统理解微生物胞外电子传递与环境的关系,为其在工程中的应用提供理论指导.展开更多
Developing a stable,reliable,and industrially compatible method to control hydrophobicity is crucial for separation,transportation,and the generation of special surfaces.An e-HMS-PDMS silica gel nanoparticle coating w...Developing a stable,reliable,and industrially compatible method to control hydrophobicity is crucial for separation,transportation,and the generation of special surfaces.An e-HMS-PDMS silica gel nanoparticle coating was prepared using a two-step electron beam irradiation(EBI)process,consisting of(i)grafting of two organic groups onto thiol-functionalized hollow mesoporous silica(HMS-SH)with 10 MeV EBI and(ii)curing of polydimethylsiloxane(PDMS)onto silicone rubber using the HMS hybrid materials prepared in step i as an additive with 200 keV EBI.The tuneable grafting of functional groups and the surface properties of the silica,which was embedded in the PDMS layer,allowed us to precisely control the hydrophilicity of the PDMS layer by means of altering the grafting gradient of the silica and the loading ratio of the monomers.A diverse range of vinyl-structured monomers can be used in this method,and the selection of suitable monomers is vital in determining the physical properties of the coating layer.The hydrophilicity of the coating can be linearly controlled within a specific range(50°to 155°)by using suitable monomers,allowing for the design of surfaces with specific hydrophilic and hydrophobic requirements.展开更多
文摘微生物胞外电子传递(Extracellular electron transfer,EET)在地球生物化学循环、生态修复、废水处理以及资源再生等领域发挥着重要作用.自然界中胞外电子传递的界面性质各异,导致反应速率和效率明显不同.本文介绍了胞外电子传递过程涉及的无机物-微生物界面和有机物-微生物界面,总结了反应物表面性质与微生物的互作规律:反应物表面的氧化还原活性决定其电子接受/释放能力,从根本上影响胞外电子传递发生的可能性;微生物与反应物之间的氧化还原电势差决定了电子传递方向;表面电荷、润湿性、表面粗糙度、孔隙度和生物相容性综合影响微生物在固体表面的吸附、粘附、生物膜生长及活性,从而影响胞外电子传递的效率;导电性影响电子传输速率.本综述旨在通过对比各种反应界面,认识不同反应物界面间的共性与特性.这些认识有助于系统理解微生物胞外电子传递与环境的关系,为其在工程中的应用提供理论指导.
基金supported by the Program for HUST Academic Frontier Youth Team(2019QYTD06)Natural Science Foundation of Wuhan.
文摘Developing a stable,reliable,and industrially compatible method to control hydrophobicity is crucial for separation,transportation,and the generation of special surfaces.An e-HMS-PDMS silica gel nanoparticle coating was prepared using a two-step electron beam irradiation(EBI)process,consisting of(i)grafting of two organic groups onto thiol-functionalized hollow mesoporous silica(HMS-SH)with 10 MeV EBI and(ii)curing of polydimethylsiloxane(PDMS)onto silicone rubber using the HMS hybrid materials prepared in step i as an additive with 200 keV EBI.The tuneable grafting of functional groups and the surface properties of the silica,which was embedded in the PDMS layer,allowed us to precisely control the hydrophilicity of the PDMS layer by means of altering the grafting gradient of the silica and the loading ratio of the monomers.A diverse range of vinyl-structured monomers can be used in this method,and the selection of suitable monomers is vital in determining the physical properties of the coating layer.The hydrophilicity of the coating can be linearly controlled within a specific range(50°to 155°)by using suitable monomers,allowing for the design of surfaces with specific hydrophilic and hydrophobic requirements.
