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Your search keyword '"Chun-Mei Guo"' showing total 7 results
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7 results on '"Chun-Mei Guo"'

3. Crystal structure of ethyl (Z)-3-amino-2-cyano-3-(2-oxo-2H-chromen-3-yl)acrylate, C15H12N2O4

Author

Chun-Mei Guo, Sha Chen, Mei-Jun Chu, Min Wan, and Xu-Liang Nie

Subjects
Inorganic Chemistry, General Materials Science, Condensed Matter Physics
Abstract

C15H12N2O4, monoclinic, P21/c (no. 14), a = 5.4588(5) Å, b = 29.629(3) Å, c = 8.1217(8) Å, β = 93.157(1)°, V = 1311.6(2) Å3, Z = 4, R gt (F) = 0.0346, wR ref (F 2) = 0.0925, T = 296(2) K.

Published
2022

6. Nanofiltration membrane with substrate incorporated amine-functionalized graphene oxide for enhanced petrochemical wastewater and shale gas produced water desalination

Author

Jin-fu Chen, Chun-mei Guo, Fan-xin Kong, Zhi-Yun Yang, and Li-Ping Yue

Subjects
Chemistry, Mechanical Engineering, General Chemical Engineering, Oxide, Substrate (chemistry), General Chemistry, Interfacial polymerization, Produced water, Desalination, chemistry.chemical_compound, Membrane, Chemical engineering, General Materials Science, Amine gas treating, Nanofiltration, Water Science and Technology
Abstract

Polyamide (PA) nanofiltration (NF) membranes were fabricated via interfacial polymerization (IP) with graphene oxide (GO)/aminated GO (NGO)-incorporated substrate and then compared for petrochemical wastewater and shale gas produced water desalination. Crosslinking degree of PA layer with GO-incorporated substrate and NGO-incorporated substrate was higher than pristine membrane. Water flux of TFCGO-0.05 (with GO addition mass of 0.05 wt%) and TFCNGO-0.075 (with NGO addition mass of 0.075 wt%) membrane substantially increased by 15.6% and 26.9% with the highest flux of 44.93 and 49.30 L m-2 h-1, respectively, while slight difference was observed for Na2SO4, MgSO4, NaCl rejection. The better performance of TFCNGO than TFCGO was attributed to much thinner PA layer due to relatively larger pore size, higher hydrophilicity, and possible reaction of amino group of NGOs with TMC, which resulted in lower PA layer thickness of TFCNGO membranes. Substantial enhancement of water flux (higher than 24.8%) and similar divalent ion rejections can be observed for petrochemical wastewater, as consistent with the single salt test. However, better performance in permeability and divalent ion rejections (approximately 6% higher than pristine membrane) was observed for shale gas produced water. These results also demonstrated that it is feasible to incorporate NGO into substrate for NF fabrication to improve performance for industrial water desalination.

Published
2021

7. Endoscopic therapy for early colorectal cancer:a retrospective study.

Author

Yadan Wang, Jing Wu, Hui Su, Kuiliang Liu, Nan Wei, Wu Lin, Chun mei Guo, Hong Liu, and Canghai Wang

Subjects
COLORECTAL cancer, ONCOLOGY, CANCER invasiveness, CANCER genetics, CANCER cell growth
Abstract

Appropriate treatment options for early colorectal cancer (ECRC) smaller than 20 mm remains controversial. Here, we studied the efficacy and safety of endoscopic therapy for ECRC smaller than 20 mm. About 191 patients with colorectal lesions entered into our study from January 2017 to December 2019. Lesions were divided into two groups according to sizes: smaller than 10 mm group and 10-20 mm group. Most cases of ECRC were found in the left colon (70.15%), and the male to female ratio was 1.81:1. A very smaller proportion of colorectal lesions smaller than 10 mm in size were submucosal carcinoma (0.077%), whereas 3.85% of colorectal lesions between 10 mm and 20 mm in size were submucosal carcinoma (P=0.049). Cold snare polypectomy (CSP) was found to be a safe and efficient for lesions smaller than 10 mm. For the lesions smaller than 10 mm, the rate of en bloc resection reached 100%, whereas only 81.82% of the lesions of 10-20 mm in size could be resected en bloc and for these cases, endoscopic mucosal resection (EMR) were better therapeutic options. Endoscopic CSP is an appropriate therapeutic approach for ECRC of less than 10 mm in size, whereas for lesions smaller than 10 mm in size but with submucosal infiltration, EMR should be considered. For submucosal carcinoma (SM-carcinoma), endoscopic submucosal dissection (ESD) or surgery should be considered as better options. [ABSTRACT FROM AUTHOR]

Published
2021

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