Time filter

Source Type

Dalikou, China

Li Y.H.,Dali College | Liu Y.J.,Yunnan University | Kan H.E.,Yunnan University | Liu Q.J.,Yunnan University | Zhao H.Y.,Yunnan University
Materials Technology | Year: 2012

A synthesising method is reported with an enhanced solid state reaction to fabricate SnO 2 nanorods. The structure and morphology of the SnO 2 nanorods were characterised by X-ray diffraction and transmission electron microscopy. The results showed that the nanorods were rutile SnO 2 with a diameter of ,30 nm and length of several micrometres. It was found that chlorine salt was very important for controlling the grain size of nanoparticles and providing kinetic and ambulatory circumstance to induce oriented growth of SnO 2 nanoparticles. The growth mechanism of the nanorods can be understood on the basis of oriented aggregation induced by polar forces. © 2012 W. S. Maney & Son Ltd. Source

Kan H.E.,Yunnan University | Zhao Y.F.,Yunnan University | Liu Y.J.,Yunnan University | Li Y.H.,Yunnan University | And 2 more authors.
Materials Technology | Year: 2012

Orthogonal perovskite EuFe 0.9Co 0.1O 3 oxides with uniform particle size distribution were prepared by sol-gel method. The samples were calcined at different temperatures, and the results showed that the mean grain size increased from 31 to 38 nm when the calcining temperature was increased from 600 to 900°C. Investigation of the sensing properties exhibited that the sensor based on EuFe 0.9Co 0.1O 3 calcined at 800°C has good acetone gas sensing properties at an operating temperature of 280°C. © 2012 W. S. Maney & Son Ltd. Source

Yang M.H.,Nature Technology | Yang M.H.,Dali College | Cai L.,Nature Technology | Li M.H.,Nature Technology | And 3 more authors.
Chinese Chemical Letters | Year: 2010

Three new monophenanthrene compounds were isolated from an acetone extract of the tubers of Monomeria barbata Lindl. (Orchidaceae). Using spectroscopic methods, the structures of compounds 1-3 were determined as 1,4,7-trihydroxy-2-methoxy-9,10-dihydrophenanthrene (1), 1-(p-hydroxybenzoyl)-2-methoxy-4,7-dihydroxy-9,10-dihydrophenanthrene (2), 1,3,8-tri(p-hydroxybenzyl)-4-methoxy-phenanthrene-4,7-diol (3). These compounds showed cytotoxicities on four tumor cell lines (HepG2, HL-60, Skov-3, A431). © 2009 Zhong Tao Ding. Source

Li Y.,Yunnan University | Li Y.,Dali College | Liu Y.,Yunnan University | Xiao X.,Yunnan University | And 2 more authors.
Advanced Materials Research | Year: 2012

SnO 2 nanorods with rutile structure were successfully synthesized by solid state reaction in the presence of NaCl-KCl. Indirect-heating sensors based on nanorods were fabricated and investigated for the gas sensing properties to ethanol. The results showed that the response of sensor to 1000 ppm ethanol is up to 114.3, the export voltage to 1 ppm ethanol can attain 2.0 V at 275 °C, and the response time and recovery time are no longer than 10 s. Source

He Z.,Zhejiang University | He Z.,Dali College | Liang F.,Zhejiang University | Zhang Y.,Zhejiang University | Pan Y.,Zhejiang University
Carbohydrate Research | Year: 2014

Four water-soluble polysaccharides, FCp-1, FCp-2, FCp-3, and FCp-4 were obtained from finger citron fruits (Citrus medica L. var. sarcodactylis) by hot-water extraction and ethanol precipitation, followed by routine separation procedure. Based on the calibration curve, molecular weights of them were estimated to be 113.9, 32.6, 140.3, and 177.1 kDa respectively. The acid hydrolysis, methylation, IR, GC-MS, and NMR experiments were used for composition analysis. FCp-1 was a heteropolysaccharide composed of arabinose, galactose, glucose, rhamnose, and xylose, with a molar ratio of 3.0:7.0:4.1:1.0:1.5. FCp-2 and FCp-4 were →4)-α-d-GalpA(1→ linking galacturonan differ in molecular weights. FCp-3 was a →6)-α-d-Glcp(1→ linking glucan. According to the results of in vitro assays, FCp-3 showed significantly and moderately enhancing capacities toward the proliferation of splenocytes and thymocytes respectively. Thus, FCp-3 or analogs may have further use as immunomodulatory agents. © 2014 Published by Elsevier Ltd. All rights reserved. Source

Discover hidden collaborations