O437.2 97053122光学表面光散射特性分析=Analysis on propertiesof light scattering from optical surface[刊,中]/田来科(西北大学物理系.陕西,西安(710069))//光子学报.—1996,25(8).—760—763通过对光学表面光散射特性的研究,结...O437.2 97053122光学表面光散射特性分析=Analysis on propertiesof light scattering from optical surface[刊,中]/田来科(西北大学物理系.陕西,西安(710069))//光子学报.—1996,25(8).—760—763通过对光学表面光散射特性的研究,结果表明:光散射强度随入射光波长的增加而减小,随表面粗糙度增加而增加。图2表2参2(严兰)O437.2 97053123光散射在线分析系统=Light scattering analysissystem on line[刊,中]/刘文耀,郑玉锋(天津大学精密仪器工程系.天津(300072))//仪器仪表学报.—展开更多
The photochemical mineralization of dissolved organic carbon(DOC) to dissolved inorganic carbon(DIC) is a key process in carbon cycling.Using a Suntest CPS solar simulator,Suwannee River humic acid(SRHA) was photooxid...The photochemical mineralization of dissolved organic carbon(DOC) to dissolved inorganic carbon(DIC) is a key process in carbon cycling.Using a Suntest CPS solar simulator,Suwannee River humic acid(SRHA) was photooxidated to examine the effects of O2 levels,the wavelength of incident light,and the concentration of Fe on the photoproduction of DIC.Increasing the O2 abundance enhanced photodegradation of SRHA.The rate of DIC photoproduction under air saturation in the first 24 h(4.40 μmol/(L h)) was increased by a factor of 1.56 under O2 saturation,but fell by only 36% under N2 saturation.To evaluate the relative importance of UV-B,UV-A,and visible radiation in the photodegradation,we examined the above process using Mylar-d films and UF-3 and UF-4 plexiglass filters.The results indicated that the UV-B,UV-A and visible wavelengths accounted for 31.8%,32.6% and 25.6%,respectively,of DIC production with simulated sunlight irradiation.The above results also indicated that photoproduction of DIC could take place in natural water at depths greater than those that UV light can reach.When 20 μmol/L desferrioxamine mesylate(DFOM,a strong Fe complexing ligand) was added,the rate of DIC photoproduction fell to 55.6% that of the original SRHA samples with 5.46 μmol/L Fe.展开更多
文摘O437.2 97053122光学表面光散射特性分析=Analysis on propertiesof light scattering from optical surface[刊,中]/田来科(西北大学物理系.陕西,西安(710069))//光子学报.—1996,25(8).—760—763通过对光学表面光散射特性的研究,结果表明:光散射强度随入射光波长的增加而减小,随表面粗糙度增加而增加。图2表2参2(严兰)O437.2 97053123光散射在线分析系统=Light scattering analysissystem on line[刊,中]/刘文耀,郑玉锋(天津大学精密仪器工程系.天津(300072))//仪器仪表学报.—
基金Supported by the National Science and Engineering Research Committee of Canada (No213327)
文摘The photochemical mineralization of dissolved organic carbon(DOC) to dissolved inorganic carbon(DIC) is a key process in carbon cycling.Using a Suntest CPS solar simulator,Suwannee River humic acid(SRHA) was photooxidated to examine the effects of O2 levels,the wavelength of incident light,and the concentration of Fe on the photoproduction of DIC.Increasing the O2 abundance enhanced photodegradation of SRHA.The rate of DIC photoproduction under air saturation in the first 24 h(4.40 μmol/(L h)) was increased by a factor of 1.56 under O2 saturation,but fell by only 36% under N2 saturation.To evaluate the relative importance of UV-B,UV-A,and visible radiation in the photodegradation,we examined the above process using Mylar-d films and UF-3 and UF-4 plexiglass filters.The results indicated that the UV-B,UV-A and visible wavelengths accounted for 31.8%,32.6% and 25.6%,respectively,of DIC production with simulated sunlight irradiation.The above results also indicated that photoproduction of DIC could take place in natural water at depths greater than those that UV light can reach.When 20 μmol/L desferrioxamine mesylate(DFOM,a strong Fe complexing ligand) was added,the rate of DIC photoproduction fell to 55.6% that of the original SRHA samples with 5.46 μmol/L Fe.
