采用Lowery法、ANS荧光探针法、圆二色光谱、荧光光谱等方法分别对不同辐照处理的红豆分离蛋白溶解度、表面疏水性、蛋白质二级、三级结构、流体动力学半径进行分析。结果表明:随着辐照剂量的增加,红豆分离蛋白的二级结构中α-螺旋结构...采用Lowery法、ANS荧光探针法、圆二色光谱、荧光光谱等方法分别对不同辐照处理的红豆分离蛋白溶解度、表面疏水性、蛋白质二级、三级结构、流体动力学半径进行分析。结果表明:随着辐照剂量的增加,红豆分离蛋白的二级结构中α-螺旋结构向无规则卷曲结构的转变,Trp残基所处微环境极性先增强后减弱,这与其表面疏水性呈现正相关,蛋白颗粒大小随着辐照剂量的增加先减小后增大,在5 k Gy辐照剂量处理时达到最小,这与其溶解性呈现负相关。展开更多
By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was ca...By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was carried out.Thermal properties of fiber sampleswere examined using differential scanning calorimetry(DSC),thermomechanical analysis(TMA)apparatusand a manual device.The results indicated that the opti-mal irradiation energy is 250-400 mJ/cm^2,heat-andcreep-resistant behaviors of modified fibers have beenimproved.展开更多
Zeolitic Imidazolate Framework-8(ZIF-8)material was prepared by chemical precipitation method.The microstructure and physical properties of the as-prepared samples were characterized by XRD,BET,FESEM and UV spectropho...Zeolitic Imidazolate Framework-8(ZIF-8)material was prepared by chemical precipitation method.The microstructure and physical properties of the as-prepared samples were characterized by XRD,BET,FESEM and UV spectrophotometer.The self-made four-channel measurement device was used to test the gas sensitivity of ZIF-8 material toward ethanol gas under photo-thermal synergistic excitation.The results showed that the sample was typical ZIF-8(E_(g)=4.96 eV)with a regular dodecahedron shape and the specific surface is up to 1793 m^(2)/g.The as-prepared ZIF-8 has a gas response value of 55.04 to 100 ppm ethanol at 75℃ and it shows good gas sensing selectivity and repeated stability.The excellent gas sensitivity can be attributed to the increase of free electron concentration in the ZIF-8 conduction band by photo-thermal synergistic excitation,and the large specific surface area of ZIF-8 material provides more active sites for gas-solid surface reaction.The reaction mechanism of ZIF-8 material under multi-field excitation was also discussed.展开更多
文摘采用Lowery法、ANS荧光探针法、圆二色光谱、荧光光谱等方法分别对不同辐照处理的红豆分离蛋白溶解度、表面疏水性、蛋白质二级、三级结构、流体动力学半径进行分析。结果表明:随着辐照剂量的增加,红豆分离蛋白的二级结构中α-螺旋结构向无规则卷曲结构的转变,Trp残基所处微环境极性先增强后减弱,这与其表面疏水性呈现正相关,蛋白颗粒大小随着辐照剂量的增加先减小后增大,在5 k Gy辐照剂量处理时达到最小,这与其溶解性呈现负相关。
基金oral prepared in the Second East Asian Polymer Conference held in Hongkong,China,January 12-16,1999
文摘By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was carried out.Thermal properties of fiber sampleswere examined using differential scanning calorimetry(DSC),thermomechanical analysis(TMA)apparatusand a manual device.The results indicated that the opti-mal irradiation energy is 250-400 mJ/cm^2,heat-andcreep-resistant behaviors of modified fibers have beenimproved.
基金supported by the National Natural Science Foundation of China(No.51864028)the Yunnan Province Science and Technology Major Project for Materials Genetic Engineering of Rare and Precious Metal(No.202002AB080001)+2 种基金the Yunnan Province Funds for Distinguished Young Scientists,(No.2019FJ005)the Science Research Foundation of Yunnan Provincial Education Department(No.2022J0441)the Sichuan Science and Technology Program(No.22QYCX0097)。
文摘Zeolitic Imidazolate Framework-8(ZIF-8)material was prepared by chemical precipitation method.The microstructure and physical properties of the as-prepared samples were characterized by XRD,BET,FESEM and UV spectrophotometer.The self-made four-channel measurement device was used to test the gas sensitivity of ZIF-8 material toward ethanol gas under photo-thermal synergistic excitation.The results showed that the sample was typical ZIF-8(E_(g)=4.96 eV)with a regular dodecahedron shape and the specific surface is up to 1793 m^(2)/g.The as-prepared ZIF-8 has a gas response value of 55.04 to 100 ppm ethanol at 75℃ and it shows good gas sensing selectivity and repeated stability.The excellent gas sensitivity can be attributed to the increase of free electron concentration in the ZIF-8 conduction band by photo-thermal synergistic excitation,and the large specific surface area of ZIF-8 material provides more active sites for gas-solid surface reaction.The reaction mechanism of ZIF-8 material under multi-field excitation was also discussed.
