We fabricate flexible conductive and transparent graphene films on position-emission-tomography substrates and prepare large area graphene films by graphite oxide sheets with the new technical process. The multi-layer...We fabricate flexible conductive and transparent graphene films on position-emission-tomography substrates and prepare large area graphene films by graphite oxide sheets with the new technical process. The multi-layer graphene oxide sheets can be chemically reduced by HNO3 and HI to form a highly conductive graphene film on a substrate at lower temperature. The reduced graphene oxide sheets show a high conductivity sheet with resistance of 476Ω/sq and transmittance of 76% at 550nm （6 layers）. The technique used to produce the transparent conductive graphene thin film is facile, inexpensive, and can be tunable for a large area production applied for electronics or touch screens.展开更多
Abstract [ Objective ] This study aimed to screen a marine-derived cellulase producing filamentous fungus and to investigate the yielding conditions and celluase activity. [ Method] A total of 25 marine-derived filame...Abstract [ Objective ] This study aimed to screen a marine-derived cellulase producing filamentous fungus and to investigate the yielding conditions and celluase activity. [ Method] A total of 25 marine-derived filamentous fungus were screened out of from Bohai Bay, and one producing cellulase was obtained through Congo red transparent circle method and cellulase activity assay. After that, optimum conditions were examined for cellulase producing and catalyzing. [ Result] CMC-Na could induce ZDTJ097-1-（7 ） strain to produce filter paper cellulase, CMC cellulase and 13-glucosidase. The optimum conditions for ZDTJ097-1-（7） to produce en- zymes were 0.5% CMC-Na, 0. 2% NH4NO3 , pH 6.0 at 25 ℃. [ Conclusion] This study provided reference for furfller development and utilization of cellulase produ-cing fungus ZDTJ097-1-（7）.展开更多
Quantitative phase microscopy by digital holography provides direct access to the phase profile of a transparent subject with high precision. This is useful for observing phenomena that modulate phase, but are otherwi...Quantitative phase microscopy by digital holography provides direct access to the phase profile of a transparent subject with high precision. This is useful for observing phenomena that modulate phase, but are otherwise difficult or impossible to detect. In this letter, a carefully constructed digital holographic apparatus is used to measure optically induced thermal lensing with an optical path difference precision of less than 1 nm. Furthermore, by taking advantage of the radial symmetry of a thermal lens, such data are processed to determine the absorption coefficient of transparent media with precisions as low as 1 × 10-5cm-1 using low power （30 mW） continuous wave （CW） excitation.展开更多
基金Supported by the Basic Research Program of Nanjing University of Posts and Telecommunications under Grant No NY212002the Innovative Research Team in University under Grant No IRT1148the 2014 Shuangchuang Program of Jiangsu Province
文摘We fabricate flexible conductive and transparent graphene films on position-emission-tomography substrates and prepare large area graphene films by graphite oxide sheets with the new technical process. The multi-layer graphene oxide sheets can be chemically reduced by HNO3 and HI to form a highly conductive graphene film on a substrate at lower temperature. The reduced graphene oxide sheets show a high conductivity sheet with resistance of 476Ω/sq and transmittance of 76% at 550nm （6 layers）. The technique used to produce the transparent conductive graphene thin film is facile, inexpensive, and can be tunable for a large area production applied for electronics or touch screens.
基金Supported by the National Natural Science Foundation of China(30971904)
文摘Abstract [ Objective ] This study aimed to screen a marine-derived cellulase producing filamentous fungus and to investigate the yielding conditions and celluase activity. [ Method] A total of 25 marine-derived filamentous fungus were screened out of from Bohai Bay, and one producing cellulase was obtained through Congo red transparent circle method and cellulase activity assay. After that, optimum conditions were examined for cellulase producing and catalyzing. [ Result] CMC-Na could induce ZDTJ097-1-（7 ） strain to produce filter paper cellulase, CMC cellulase and 13-glucosidase. The optimum conditions for ZDTJ097-1-（7） to produce en- zymes were 0.5% CMC-Na, 0. 2% NH4NO3 , pH 6.0 at 25 ℃. [ Conclusion] This study provided reference for furfller development and utilization of cellulase produ-cing fungus ZDTJ097-1-（7）.
基金supported in part by the National Science Foundation of USA under Grant No. 0755705
文摘Quantitative phase microscopy by digital holography provides direct access to the phase profile of a transparent subject with high precision. This is useful for observing phenomena that modulate phase, but are otherwise difficult or impossible to detect. In this letter, a carefully constructed digital holographic apparatus is used to measure optically induced thermal lensing with an optical path difference precision of less than 1 nm. Furthermore, by taking advantage of the radial symmetry of a thermal lens, such data are processed to determine the absorption coefficient of transparent media with precisions as low as 1 × 10-5cm-1 using low power （30 mW） continuous wave （CW） excitation.
