Cotton fiber is major materials of the textile industry in the world.Productions of cotton fiber affect our li...
Hu Mingyu Tan Kunling Xiao Zhongyi Chen Kuijun Liao Peng Luo Ming (Key Laboratory of Biotechnology and Crop Quality Improvement,Ministry of Agriculture
AIM:To evaluate the SF-36, Diabetes Specificity Quality of Life Scale (DSQL) and anxiety and depression symptoms and investigate its changes in proliferative diabetic retinopathy (PDR) by vitrectomy interventions. METHODS:The present study included 108 diabetic retinopathy (DR) patients:54 with PDR and 54 with non-proliferative diabetic retinopathy (NPDR). Each healthy control group (n =54) sociodemographically matched to DR groups was established respectively. The quality of life, anxiety and depression symptoms were evaluated and analyzed on preoperative and postoperative month 1 using SF-36, DSQL and Hospital Anxiety and Depression Scale (HADS). · RESULTS:DR patients described impaired HRQL (Health Related Quality of life, SF -36) in 6 out of 8 subscales, including ‘Body Health’, ‘Body RoleFunction’,‘General Health’,‘Society Function’,‘Emotion Role Function’and‘Mental Health’. Compared with controls, DR patients (NPDR and PDR) suffered from statistically significantly impaired HRQL (SF-36 Summary score) (P< 0.05). By surgical intervention, the anxiety and depression score were significantly reduced, while the health and quality of life (SF-36 Summary scores and DSQL scores) was improved in patients with PDR (P <0.05). CONCLUSION:DR patients were affected in mentation and quality of life. Surgery interventions can improve SF-36, DSQL, anxiety and depression in PDR patients.
Yao YuLie FengYi ShaoPing TuHe-Ping WuXun DingWei-Hua Xiao
Objective To optimize microwave-assisted extraction of polyphenols from Enteromorpha prolifra. Methods Based on single-factor tests, an efficient microwave-assisted extraction (MAE) technique was developed to extract bioactive polyphenols from E. prolifra through orthogonal L16(4)5 test. Results The highest yield (0.923 ± 0.013) mg/g was obtained when microwave power, solvent to raw material ratio, irradiation time, ethanol concentration, and extraction cycles were 500 W, 25 mL/g, 25 min, 40%, and 3, respectively, which was higher than that of Soxhlet extraction with methanol for 6 h, ultrasound-assisted extraction with 40% ethanol for 1 h twice and heat reflux extraction with 40% ethanol for 2 h twice. Conclusion This finding indicates that MAE is a superior technique for the extraction of polyphenols due to less impurity, higher time efficiency and yield.
LUO Hong-yu1, 2, WANG Bin2, YU Chun-guang2, XU Yin-feng2 1. School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China 2. School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316000, China
A new compound named 13b (S )-hydroxy-17c-ethoxypheaophorbide a (2) together witha known compound 17c-ethoxypheaophorbide a (1) were isolated from marine sponge Dysidea sp.collected in South China sea. The structures were elucidated by spectroscopic analysis as well ascomparison with those reported in literatures.
A series of catalysts were prepared by doping different loadings of CeO2 over TiO2-SiO2-WO3 and used for the selective catalytic reduction of NOx by NH3. The experimental results showed that the selective catalytic reduction（SCR） performance and SO2-resistant ability of TiO2-SiO2-WO3 were greatly enhanced by the introduction of cerium. The catalyst containing 10% CeO2 showed the highest NO conversion in a wide temperature range and good N2 selectivity with broad operation temperature window at the gas hourly space velocity（GHSV） of 30000 h–1, which was a very promising catalyst for NOx abatement from diesel engine exhaust. The catalysts were characterized by X-ray diffraction（XRD）, scanning electron microscopy with energy dispersive X-ray spectroscopy（SEM-EDS）, N2 adsorption-desorption（BET） and X-ray photoelectron spectroscopy（XPS）. The characterization results showed that the bigger pore radius, higher surface atomic concentration and dispersion of Ce and the abundant adsorbed oxygen on the surface of catalyst contributed to the best NH3-SCR performance of CeO2/TiO2-SiO2-WO3 catalyst containing 10% CeO2.
Two new compounds, namely 7α, 10α-dimethyl-3β-isopropene-1, 2-ene-octahydro- naphthalene (1) and ethyl 5Z,8Z,11Z,14Z-nonadecatetraenoate (2) were isolated from the soft coral Nephthea hainansis. Compound 1 was a pseutosesquiterpene and 2 was a polyunsaturated fatty acid ethylate. Their structures were established on the basis of spectroscopic methods.
