Using a standard photolithographical procedure, chemical wet etching and thermal diffusion bonding technology, a chemical analysis device for Capillary Electrophoresis(CK) has been microfabricated on a planar glass su...Using a standard photolithographical procedure, chemical wet etching and thermal diffusion bonding technology, a chemical analysis device for Capillary Electrophoresis(CK) has been microfabricated on a planar glass substrate with a cross-column geometry. The channels on the microchip substrate are about 50μm deep and 150μm wide. By employing amino acids derived from 2,4-DiNitroFluoroBenzeri (DNFB) on CE chip channels, the sample manipulating system is studied based on the principle of electrodynamics.展开更多
The construction of S‐scheme heterojunction photocatalysts has been regarded as an effective avenue to facilitate the conversion of solar energy to fuel.However,there are still considerable challenges with regard to ...The construction of S‐scheme heterojunction photocatalysts has been regarded as an effective avenue to facilitate the conversion of solar energy to fuel.However,there are still considerable challenges with regard to efficient charge transfer,the abundance of catalytic sites,and extended light absorption.Herein,an S‐scheme heterojunction of 2D/2D zinc porphyrin‐based metal‐organic frameworks/BiVO_(4)nanosheets(Zn‐MOF/BVON)was fabricated for efficient photocatalytic CO_(2)conversion.The optimal one shows a 22‐fold photoactivity enhancement when compared to the previously reported BiVO4 nanoflake(ca.15 nm),and even exhibits~2‐time improvement than the traditional g‐C3N4/BiVO4 heterojunction.The excellent photoactivities are ascribed to the strengthened S‐scheme charge transfer and separation,promoted CO_(2)activation by the well‐dispersed metal nodes Zn_(2)(COO)_(4)in the Zn‐MOF,and extended visible light response range based on the results of the electrochemical reduction,electron paramagnetic resonance,and in‐situ diffuse reflectance infrared Fourier transform spectroscopy.The dimension‐matched Zn‐MOF/BVON S‐scheme heterojunction endowed with highly efficient charge separation and abundant catalytic active sites contributed to the superior CO2 conversion.This study offers a facile strategy for constructing S‐scheme heterojunctions involving porphyrin‐based MOFs for solar fuel production.展开更多
Objective To demonstrate the differently expressed genes between proliferating and involuting hemangiomas by cDNA microarray in an effort to clarify the mechanism of conversion from proliferating hemangioma to involut...Objective To demonstrate the differently expressed genes between proliferating and involuting hemangiomas by cDNA microarray in an effort to clarify the mechanism of conversion from proliferating hemangioma to involution one. Methods Samples of the proliferating and involuting phases in the same hemangioma were processed from total RNA to purified mRNA , then reverse-transcripted and hybridized onto BioDoor human 4096 target genes microarray. Analyses were performed to determine the consensus pattern of gene expression and their changes in expression level. Results In proliferating hemangioma, 79 genes were underexpressed, and 115 genes were overexpressed in comparison with that of involuting hemangioma as control. Differently expressed genes may be related to the process of conversion in that. ( 1 ) Some cytokines and growth factors were overexpressed in proliferating hemangioma ; ( 2 ) In involuting hemangioma, apoptotic factors were overexpressed ; (3) Angiogenesis and oncogenes might participate in the pathogenesis of hemangiomas ; ( 4 ) Mitochondral activated apoptotic passage and Wnt/beta-catenin passage were involved. Conclusion The altered gene expression profile between proliferatingand involuting phase of the same hemangioma shows that the development of hemangiomas may be the results of imbalance of cell proliferation and apoptosis.展开更多
文摘Using a standard photolithographical procedure, chemical wet etching and thermal diffusion bonding technology, a chemical analysis device for Capillary Electrophoresis(CK) has been microfabricated on a planar glass substrate with a cross-column geometry. The channels on the microchip substrate are about 50μm deep and 150μm wide. By employing amino acids derived from 2,4-DiNitroFluoroBenzeri (DNFB) on CE chip channels, the sample manipulating system is studied based on the principle of electrodynamics.
文摘The construction of S‐scheme heterojunction photocatalysts has been regarded as an effective avenue to facilitate the conversion of solar energy to fuel.However,there are still considerable challenges with regard to efficient charge transfer,the abundance of catalytic sites,and extended light absorption.Herein,an S‐scheme heterojunction of 2D/2D zinc porphyrin‐based metal‐organic frameworks/BiVO_(4)nanosheets(Zn‐MOF/BVON)was fabricated for efficient photocatalytic CO_(2)conversion.The optimal one shows a 22‐fold photoactivity enhancement when compared to the previously reported BiVO4 nanoflake(ca.15 nm),and even exhibits~2‐time improvement than the traditional g‐C3N4/BiVO4 heterojunction.The excellent photoactivities are ascribed to the strengthened S‐scheme charge transfer and separation,promoted CO_(2)activation by the well‐dispersed metal nodes Zn_(2)(COO)_(4)in the Zn‐MOF,and extended visible light response range based on the results of the electrochemical reduction,electron paramagnetic resonance,and in‐situ diffuse reflectance infrared Fourier transform spectroscopy.The dimension‐matched Zn‐MOF/BVON S‐scheme heterojunction endowed with highly efficient charge separation and abundant catalytic active sites contributed to the superior CO2 conversion.This study offers a facile strategy for constructing S‐scheme heterojunctions involving porphyrin‐based MOFs for solar fuel production.
文摘Objective To demonstrate the differently expressed genes between proliferating and involuting hemangiomas by cDNA microarray in an effort to clarify the mechanism of conversion from proliferating hemangioma to involution one. Methods Samples of the proliferating and involuting phases in the same hemangioma were processed from total RNA to purified mRNA , then reverse-transcripted and hybridized onto BioDoor human 4096 target genes microarray. Analyses were performed to determine the consensus pattern of gene expression and their changes in expression level. Results In proliferating hemangioma, 79 genes were underexpressed, and 115 genes were overexpressed in comparison with that of involuting hemangioma as control. Differently expressed genes may be related to the process of conversion in that. ( 1 ) Some cytokines and growth factors were overexpressed in proliferating hemangioma ; ( 2 ) In involuting hemangioma, apoptotic factors were overexpressed ; (3) Angiogenesis and oncogenes might participate in the pathogenesis of hemangiomas ; ( 4 ) Mitochondral activated apoptotic passage and Wnt/beta-catenin passage were involved. Conclusion The altered gene expression profile between proliferatingand involuting phase of the same hemangioma shows that the development of hemangiomas may be the results of imbalance of cell proliferation and apoptosis.
