Search

Your search keyword '"Shi, Gao-Feng"' showing total 121 results
Start Over Author "Shi, Gao-Feng"
121 results on '"Shi, Gao-Feng"'

18. Prediction of radiotherapy effect by diffusion-weighted imaging in esophageal carcinoma xenograft model

Author

Zhang, Andu, Su, Xiaohua, Wang, Yanfei, Shi, Gao-Feng, Han, Chun, Zhang, Jun, Wang, Lan, and Zhang, Ruohui

Subjects
Driving while intoxicated, Radiotherapy, EDTA, Esophageal cancer, Carcinoma, Necrosis, Tumors, Health
Abstract

Byline: Andu. Zhang, Xiaohua. Su, Yanfei. Wang, Gao-Feng. Shi, Chun. Han, Jun. Zhang, Lan. Wang, Ruohui. Zhang Aim: This study was to evaluate the value of diffusion-weighted imaging (DWI) in [...]

Published
2020

19. Synthesis of BiOCl/C/g-C3N4 Z-scheme heterojunction: mercury lamp-driven heterojunction for efficient degradation of phenol.

Author

Song, Kai, Chen, Wan-ping, Wang, Run-quan, Zhang, Yue-rong, Tian, Yuan, Li, Jia-xian, Wang, Guo-ying, and Shi, Gao-feng

Subjects
HETEROJUNCTIONS, ELECTRON-hole recombination, PHENOL, MERCURY, CHARGE carriers
Abstract

Designing photocatalysts to remove organic pollutants are of great significance in the environmental field. Herein, BiOCl/C/g-C3N4 photocatalyst was synthesized with biochar, BiOCl, and g-C3N4. Biochar was first used as an electronic medium to accelerate charge carrier separation. Moreover, the formation of the built-in electric field between BiOCl and g-C3N4 interface inhibits the electron–hole recombination during the photocatalytic process. The characterization results show that the Z-scheme heterojunction structure was successfully prepared. The BiOCl(0.5)C(0.03)g-C3N4(0.97) photocatalyst had up to 96.9% degradation of phenol under mercury lamp irradiation. The rate constant of the photodegradation reaction process is 0.38706 h−1, which is 2.1 times that of pure BiOCl. And photocatalyst has satisfactory stability, which a three-cycle retention rate was 97.6%. In addition, the reaction mechanism was studied, and the photogenerated carrier transferring pathways of BiOCl/C/g-C3N4 Z-scheme photocatalysts were proposed. The photocatalyst offers new ideas for the Z-scheme heterojunction photocatalyst. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

33. Physicochemical Characterization of Veronicafolin-β-cyclodextrin and Solubility Enhancement of Veronicafolin-HP-β-cyclodextrin Inclusion Compound

Author

Shi Yan‐Ping, Yang Ai‐Mei, Lu Runhua, Shi Gao-feng, Zhang Ying-peng, and Yang Yunshang

Subjects
chemistry.chemical_classification, Thermogravimetric analysis, Cyclodextrin, General Chemistry, Inclusion compound, chemistry.chemical_compound, chemistry, Elemental analysis, Stability constants of complexes, Phase (matter), Organic chemistry, Solubility, Nuclear chemistry, Solubility diagram
Abstract

Inclusion complexation between veronicafolin, 3,5,4'-trihydroxy-6,7,3'-trimethoxyflavone, and beta-cyclodextrin (beta-CD) was investigated by using H-1 NMR, IR, X-ray diffraction, thermo gravimetric analysis (TGA), and elemental analysis in the solid slate. The elemental analysis showed that the complex (1 : 1) of flavonol-beta-CD center dot 20H(2)O with C 39.58% and H 5.75% has been formed. The phase solubility profile of the favonol by UV-Vis in solution in the presence of hydroxypfropyl-beta-cyclodextrin (HP-beta-CD) was classified as A(L)-type, indicating the formation of I :: I inclusion complex. And the calibration equation y = 24148x+ 0.0075 (r= 0.9999) and phase-solubility diagram y = 0.4738x-2.0X10(-7) 10(-7\) (r=0.9490) were obtained. Stability constant K, was calculated from the phase solubility diagram (K-s=4.5 X 10(6)). Solubility of the veronicafolin was enhanced in the presence of HP-beta-CD.

Published
2005

43. Electrochemical Characterization of the Free Radical Scavenging of Baicalein.

Author

Wang, Guo-Ying, Lei, Xin-Ming, Liu, Hai-Xiao, Shi, Zhe-Ru, Su, Jin-Mei, Miao, Jian, and Shi, Gao-Feng

Subjects
NANOFABRICATION, ELECTROCHEMICAL sensors, FREE radical scavengers, CATALYTIC activity, RADICALS (Chemistry)
Abstract

Electrochemical characterization of the free radical scavenging of baicalein was performed. A sensitive and selective electrochemical sensor for the characterization of the reaction between free radicals and baicalein was fabricated based on a nanoaluminum oxide modified carbon paste electrode. The modified carbon paste electrode showed excellent electrocatalytic activity for the characterization of free radical scavenging capacity of baicalein. In 0.2 M phosphate buffer at pH 7.4, a pair of well-defined cyclic voltammetric oxidation peaks of baicalein appeared with the maximum at 700 mv. The superoxide anion radical, hydroxyl radical, lipid peroxyl radical, and of 2,2-diphenyl-l-picrylhydrazyl were used for investigating the free radical scavenging of baicalein. Baicalein showed varying scavenging capacities to these free radicals. The scavenging capacity of baicalein with the hydroxyl radical was the highest, followed by baicalein with the lipid peroxyl radical, 2,2-diphenyl-l-picrylhydrazyl, and the superoxide anion radical. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results