The inhibition effect of tert-butyl alcohol(TBA), identified as the·OH radical inhibitor, on the TiO_2 nano assays(TNA) photoelectrocatalytic oxidation of different organics such as glucose and phthalate was repo...The inhibition effect of tert-butyl alcohol(TBA), identified as the·OH radical inhibitor, on the TiO_2 nano assays(TNA) photoelectrocatalytic oxidation of different organics such as glucose and phthalate was reported. The adsorption performance of these organics on the TNA photoelectrode was investigated by using the instantaneous photocurrent value, and the degradation property was examined by using the exhausted reaction. The results showed that glucose exhibited the poor adsorption and easy degradation performance, phthalate showed the strong adsorption and harddegradation, but TBA showed the weak adsorption and was the most difficult to be degraded. The degradation of both glucose and phthalate could be inhibited evidently by TBA. But the effect on glucose was more obvious. The different inhibition effects of TBA on different organics could be attributed to the differences in the adsorption and the degradation property. For instance, phthalate of the strong adsorption property could avoid from the capture of·OH radicals by TBA in TNA photoelectrocatalytic process.展开更多
本研究以乳清分离蛋白(whey protein isolate,WPI)为原料制备淀粉样蛋白纤维(amyloid protein fibrils,APFs),通过透射电子显微镜对APFs的微观结构进行表征,确认形成了细长的非分叉纳米纤维。利用圆二色光谱和傅里叶变换红外光谱技术比...本研究以乳清分离蛋白(whey protein isolate,WPI)为原料制备淀粉样蛋白纤维(amyloid protein fibrils,APFs),通过透射电子显微镜对APFs的微观结构进行表征,确认形成了细长的非分叉纳米纤维。利用圆二色光谱和傅里叶变换红外光谱技术比较WPI和APFs二级结构的差异,结果表明相比WPI,APFs的α-螺旋含量减少,β-折叠含量增多。自由基清除率分析结果表明APFs的抗氧化性强于WPI。利用滴溅法测定样品的冰晶重结晶抑制(ice recrystallization inhibition,IRI)活性,结果表明APFs的IRI活性显著强于WPI,且保温温度越高IRI活性差异越显著。在猪肉糜中分别添加质量分数0%、1.0%、3.0%、5.0%的APFs,经冷冻解冻后测定肉糜的颜色、持水力、二硫键含量、热成胶性、水分分布。结果表明APFs在不显著改变冷冻肉糜颜色的情况下,可以显著提升冷冻肉糜的持水力、改善热凝胶性,并抑制蛋白质氧化。本研究表明APFs是一种潜在的优良冷冻肉糜保护剂。展开更多
基金the National High Technology Research and Development Program of China (Grant No.2009AA063003)the National Nature Science Foundation of China (No.20677039) for financial support
文摘The inhibition effect of tert-butyl alcohol(TBA), identified as the·OH radical inhibitor, on the TiO_2 nano assays(TNA) photoelectrocatalytic oxidation of different organics such as glucose and phthalate was reported. The adsorption performance of these organics on the TNA photoelectrode was investigated by using the instantaneous photocurrent value, and the degradation property was examined by using the exhausted reaction. The results showed that glucose exhibited the poor adsorption and easy degradation performance, phthalate showed the strong adsorption and harddegradation, but TBA showed the weak adsorption and was the most difficult to be degraded. The degradation of both glucose and phthalate could be inhibited evidently by TBA. But the effect on glucose was more obvious. The different inhibition effects of TBA on different organics could be attributed to the differences in the adsorption and the degradation property. For instance, phthalate of the strong adsorption property could avoid from the capture of·OH radicals by TBA in TNA photoelectrocatalytic process.
文摘本研究以乳清分离蛋白(whey protein isolate,WPI)为原料制备淀粉样蛋白纤维(amyloid protein fibrils,APFs),通过透射电子显微镜对APFs的微观结构进行表征,确认形成了细长的非分叉纳米纤维。利用圆二色光谱和傅里叶变换红外光谱技术比较WPI和APFs二级结构的差异,结果表明相比WPI,APFs的α-螺旋含量减少,β-折叠含量增多。自由基清除率分析结果表明APFs的抗氧化性强于WPI。利用滴溅法测定样品的冰晶重结晶抑制(ice recrystallization inhibition,IRI)活性,结果表明APFs的IRI活性显著强于WPI,且保温温度越高IRI活性差异越显著。在猪肉糜中分别添加质量分数0%、1.0%、3.0%、5.0%的APFs,经冷冻解冻后测定肉糜的颜色、持水力、二硫键含量、热成胶性、水分分布。结果表明APFs在不显著改变冷冻肉糜颜色的情况下,可以显著提升冷冻肉糜的持水力、改善热凝胶性,并抑制蛋白质氧化。本研究表明APFs是一种潜在的优良冷冻肉糜保护剂。
