201305040 用于太空聚合物材料上的抗菌涂料[刊，英]／Balagna，Christina等∥Materia Is Chemistry and Physics.-2012.135（2-3）.-714～722
在长期的太空探索中，飞船和轨道空间站上的微生物污染是一个值得注意的问题。为了解决这...201305040 用于太空聚合物材料上的抗菌涂料[刊，英]／Balagna，Christina等∥Materia Is Chemistry and Physics.-2012.135（2-3）.-714～722
在长期的太空探索中，飞船和轨道空间站上的微生物污染是一个值得注意的问题。为了解决这个问题，在适用于航空航天的聚合物材料Combitherm（一种复合膜）表面上，通过采用射频共溅射技术，沉积一种抗菌的含银纳米二氧化硅复合涂层。本文通过能量分散光谱法（EDS）、X射线光电子能谱法（XPS）、局部表面等离子共振（LSPR）、紫外可见光吸收分光光度法分析了该银纳米簇和二氧化硅材料的存在状态，并通过原子级显微镜观察涂层形貌。展开更多
The author determined the occurrence of indole-3-acetic acid in sixteen Chinese marine algae collected from the east coast of China with fluorescence spectrophotometry (FS) and wheat coleop- tile bioanalysis methods (...The author determined the occurrence of indole-3-acetic acid in sixteen Chinese marine algae collected from the east coast of China with fluorescence spectrophotometry (FS) and wheat coleop- tile bioanalysis methods (WCB). The concentration of indole-3-acetic acid (IAA) presented was from 1.1–46.9 ng/g Fw (fresh weight) with FS and 5.3–110.2 ng/g Fw with WCB. The results by the two meth- ods were in the orders of 10-3–103 ng/g Fw reported previously from multiple references.展开更多
A dual wavelength differential first derivative spectrophotometric method has been developed to standardize the concentration of a saturated aqueous solution of carbon monoxide (CO) as the standard and to identify and...A dual wavelength differential first derivative spectrophotometric method has been developed to standardize the concentration of a saturated aqueous solution of carbon monoxide (CO) as the standard and to identify and to determine CO formed during the microsomal metabolism of xenobiotics in vitro. The method can significantly eliminate the background interference in the assay media and increase the quantitative accuracy and the sensitivity. There is a good linear relationship between CO concentration in the range of 2～10 μmol·L 1 CO and the distance D between the first derivative peak at 415 nm amd valley at 426 nm with r=0.9999(n=5),the regression equation being C (mmol·L 1 )=17.6D 0.4, the detection limit lower than 0.1 μmol·L 1 CO. The average recoveries of CO from the assay system and the sample were 102.1%, RSD=2.9% (n=7) and 79.7%, RSD=6.8% (n=12),respectively. The RSD of within day was 4.4%(n=18),and the RSD of day to day was 6.1%(n=16). By this method, four trihaloanilines and one trihalobenzene were tested, the results showed that only 2,4,5 trifluoroaniline could be converted to CO by the incubation with rat hepatic microsomes, NADPH and oxygen, the ability of phenobarbital or dexamethasone to induce rat hepatic microsomes to catalyze CO formation was 3 or 8 times higher than that of the control.展开更多
文摘201305040 用于太空聚合物材料上的抗菌涂料[刊，英]／Balagna，Christina等∥Materia Is Chemistry and Physics.-2012.135（2-3）.-714～722
在长期的太空探索中，飞船和轨道空间站上的微生物污染是一个值得注意的问题。为了解决这个问题，在适用于航空航天的聚合物材料Combitherm（一种复合膜）表面上，通过采用射频共溅射技术，沉积一种抗菌的含银纳米二氧化硅复合涂层。本文通过能量分散光谱法（EDS）、X射线光电子能谱法（XPS）、局部表面等离子共振（LSPR）、紫外可见光吸收分光光度法分析了该银纳米簇和二氧化硅材料的存在状态，并通过原子级显微镜观察涂层形貌。
基金Supported No. 30530080 by the NSFC, and by Qingdao Bureau of Science and Technology (No. 04-2-NN-26).
文摘The author determined the occurrence of indole-3-acetic acid in sixteen Chinese marine algae collected from the east coast of China with fluorescence spectrophotometry (FS) and wheat coleop- tile bioanalysis methods (WCB). The concentration of indole-3-acetic acid (IAA) presented was from 1.1–46.9 ng/g Fw (fresh weight) with FS and 5.3–110.2 ng/g Fw with WCB. The results by the two meth- ods were in the orders of 10-3–103 ng/g Fw reported previously from multiple references.
文摘A dual wavelength differential first derivative spectrophotometric method has been developed to standardize the concentration of a saturated aqueous solution of carbon monoxide (CO) as the standard and to identify and to determine CO formed during the microsomal metabolism of xenobiotics in vitro. The method can significantly eliminate the background interference in the assay media and increase the quantitative accuracy and the sensitivity. There is a good linear relationship between CO concentration in the range of 2～10 μmol·L 1 CO and the distance D between the first derivative peak at 415 nm amd valley at 426 nm with r=0.9999(n=5),the regression equation being C (mmol·L 1 )=17.6D 0.4, the detection limit lower than 0.1 μmol·L 1 CO. The average recoveries of CO from the assay system and the sample were 102.1%, RSD=2.9% (n=7) and 79.7%, RSD=6.8% (n=12),respectively. The RSD of within day was 4.4%(n=18),and the RSD of day to day was 6.1%(n=16). By this method, four trihaloanilines and one trihalobenzene were tested, the results showed that only 2,4,5 trifluoroaniline could be converted to CO by the incubation with rat hepatic microsomes, NADPH and oxygen, the ability of phenobarbital or dexamethasone to induce rat hepatic microsomes to catalyze CO formation was 3 or 8 times higher than that of the control.
