摘要：In this study,a copper ferrocyanide/silica/polyvinylidene fluoride(CuFC/SiO2/PVDF)hollow-fiber composite membrane was successfully synthesized through a facile and effective crosslinking *** PVDF hollow-fiber membrane with embedded SiO2 was used to fix the dispersion of CuFC nanoparticles for cesium(Cs)*** surface morphology and chemical composition of the composite membrane were analyzed using scanning electron microscopy and X-ray photoelectron spectroscopy(XPS).The composite membrane showed a high Cs rejection rate and membrane flux at the three layers of CuFC and 0.5%SiO2,and its Cs rejection rate was not affected by variation in the pH(pH=4–10).The modified membrane could be effectively regenerated many times using ammonium nitrate(NH4NO3).The Cs selectivity performance was verified by an efficient Cs rejection rate(76.25%and 88.67%in 8 h)in a solution of 100 lg L 1 of Cs with 1 mmol L 1 of competing cations(K+and Na+).The CuFC/SiO2/PVDF hollowfiber composite membrane showed a particularly superior removal performance(greater than 90%)in natural surface water and simulated water with a low Cs ***,the CuFC/SiO2/PVDF hollow-fiber composite membrane can be used directly in engineering applications for the remediation of radioactive Cs-contaminated water.

摘要：Nature has created innumerable life forms with miraculous hierarchical structures and morphologies that are optimized for different life events through evolution over billions of *** cubic structures,which are often described by triply periodic minimal surfaces(TPMSs)and their constant mean curvature(CMC)/parallel surface companions,are of special interest to various research fields because of their complex form with unique physical *** has prompted the scientific community to fully understand the formation,structure,and properties of these *** this review,we summarize and discuss the formation mechanism and relationships of the relevant biological structures and the artificial self-assembly *** structures can be formed through biological processes with amazing regulation across a great length scales;nevertheless,artificial construction normally produces the structure corresponding to the molecular size and ***,the block copolymeric system is considered to be an applicable and attractive model system for the study of biological systems due to their versatile design and rich phase *** of the phenomena found in these two systems are compared and discussed,and this information may provide new ideas for a comprehensive understanding of the relationship between molecular shape and resulting interface curvature and the selfassembly process in living *** argue that the copolymeric system may serve as a model to understand these biological systems and could encourage additional studies of artificial self-assembly and the creation of new functional materials.

摘要：Fuel cell is an important promised source of clean renewable energy that is being under extensive scientific investigation and developments. One important type of fuel cells is PEM （proton exchange membrane fuel cell）, which is considered in this study. Specifically, this study aimed at building-up of mathematical computerized model to simulate the stages of PEM fuel cell and to investigate the effects of cell design and operation parameters on its general performance. These include membrane thickness, cell area, hydrogen pressure and ionic current density. One-dimensional model has been introduced and appealed to analyze the effects of PEM fuel cell parameters on its overall performance. The results demonstrate that the cell power （and electrical efficiency） reduces as the thickness of cell membrane gets larger. Moreover, the peak point of cell power gets its maximum value at membrane thickness of 0.005 cm and its minimum value at 0.05 cm. However, the optimum value for ionic current density to get relative high cell power and electrical efficiency is equal 0.81 A/cm^2. These findings enhance research efforts toward new design and materials of PEM fuel cell.

摘要：目的:构建E型沙眼衣原体(Ct)主要外膜蛋白(MOMP)基因重组腺病毒,为沙眼衣原体腺病毒疫苗的研究奠定基础。方法:根据Genebank中E型Ct MOMP基因序列设计引物,用高保真PCR方法从E型Ct基因组DNA中扩增得到MOMP基因片段,克隆至pcDNAII载体,测序后连接入腺病毒穿梭载体pDC316。穿梭载体pDC316-MOMP与含腺病毒基因组的辅助质粒PBHGlox△E1,3Cre共转染至HEK293细胞,在Cre-loxP重组酶作用下进行重组,包装成重组腺病毒颗粒,用PCR和RT-PCR方法进行鉴定。并用动物免疫试验检测重组腺病毒的免疫原性。结果:从E型Ct基因组DNA中扩增出约1.1 kb的特异MOMP基因片段,酶切鉴定及DNA序列测定证实穿梭载体pDC316-MOMP构建正确。穿梭载体pDC316-MOMP与含腺病毒基因组的辅助质粒PBHGlox△E1,3Cre共转染至293细胞,出现明显细胞病变效应。收集重组腺病毒,PCR法证实重组腺病毒含有MOMP基因,RT-PCR证实重组腺病毒在293细胞能表达MOMP基因。重组腺病毒免疫小鼠可诱导特异性抗体产生,证明重组腺病毒具有良好免疫原性。结论:成功构建了E型沙眼衣原体MOMP基因重组腺病毒,该重组腺病毒可诱导小鼠产生特异性抗体。