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Xining, China

Qinghai University for Nationalities is a university in Xining, Qinghai, China. It was established in December 1949 and was Qinghai's earliest university of higher education. Wikipedia.

Wang Y.N.,Qinghai University for Nationalities
Applied Mechanics and Materials | Year: 2014

With the popularization of network technology, the computer technology is developing rapidly coupled with the emergence of virtual instrument technology. In this context, virtual experiment, an effective complement to the development of the traditional experimental method, has very broad spectrum of application in the field of education, measurement, and even other research areas. Thus, virtual experiment has become an important future development of experimental teaching. Based on analysis of the history and current status of the existing virtual laboratory at home and abroad, as well as the technologies used to accomplish a virtual experiment, this thesis makes a comprehensive study to analyze the construction of the virtual experiment system, including the basic theory of its establishment, the network environment, application classification, the specific tectonic model and technical methods and its development and applications. © (2014) Trans Tech Publications, Switzerland.

Xie Y.-L.,Qinghai University for Nationalities
Electrochimica Acta | Year: 2013

Photovoltaic performance of the hybrid devices consisting of P3HT/CdS/CdSe/TiO2 nanorod array was studied. The dependence of the photovoltaic performance on the CdS/CdSe quantum dots was investigated, and it is concluded that the CdS/CdSe quantum dots play an important role in improving charge separation and injection. It has been demonstrated that coating CdS/CdSe quantum dots onto TiO2 nanorods with P3HT to form p-n heterojunctions largely improves the photovoltaic performance of the P3HT/CdSe/CdS/TiO 2 nanorod solar cells, exhibiting an energy conversion efficiency of 0.57%. © 2013 Elsevier Ltd. All rights reserved.

Lin P.-C.,Fudan University | Lin P.-C.,Qinghai University for Nationalities | Wu D.-T.,University of Macau | Xie J.,University of Macau | And 2 more authors.
Food Hydrocolloids | Year: 2015

Water soluble polysaccharides from seven batches of Gymnadenia conopsea were firstly investigated and compared using high performance size exclusion chromatography coupled with multi-angle laser light scattering/refractive index detector (HPSEC-MALLS/RID) and saccharide mapping based on polysaccharide analysis by carbohydrate gel electrophoresis (PACE), respectively. The results showed that the weight-average molecular weight (Mw) and the radius of gyration (z 1/2) of polysaccharides were ranging from 4.46×105 to 7.41×105Da and 73.3-94.2nm, respectively. By applying the polymer solution theory, the exponent (ν) values of z 1/2=kMw ν were ranging from 0.36 to 0.42, which indicated that polysaccharides from G.conopsea existed as globular in the aqueous solution. Furthermore, the results showed that α-1,4- and β-1,3(4)-glucosidic, α-1,5-arabinosidic, β-1,4-mannosidic and α-1,4-D-galactosiduronic linkages existed in polysaccharides from G.conopsea. The similarity of the hydrolysates of polysaccharides in G.conopsea collected from different regions was high. Moreover, the nitric oxide released from RAW 264.7 cells induced by polysaccharides were significantly affected by their α-1,5-arabinosidic and β-1,3(4)-glucosidic, especially α-1,4-D-galactosiduronic and β-1,4-mannosidic linkages. These results are beneficial for better understanding of the structures-bioactivity relationship of polysaccharides from G.conopsea, and helpful to improve their pharmacological activity-based quality control. © 2014 Elsevier Ltd.

Feng G.,Qinghai University for Nationalities
Future Communication, Information and Computer Science - Proceedings of the International Conference on Future Communication, Information and Computer Science, FCICS 2014 | Year: 2015

A computer is always used to deal with image post processing in the current digital photography and film and television production. But different processing methods will have different influences on the results and efficiency of processing. This work mainly studied which kind of the processing method should be used to obtain the best processing effect. Based on the present situation of the post processing of computer images and in combination with some problems in the process, it was found that only the advanced hardware equipment and software with high-quality staff can guarantee the effect of the image post processing to the largest extent. What kind of equipment should be chosen lies in the actual needs of the work. © 2015 Taylor & Francis Group, London.

Song P.,Qinghai University for Nationalities | Yang X.-Z.,South-Central University for Nationalities | Yuan J.-Q.,Guangxi Institute of Medicinal Plant
Journal of Asian Natural Products Research | Year: 2013

Bioassay directed isolation of the EtOAc extract from a traditional Chinese medicine Psoralea corylifolia resulted in the purification of two isoflavonoids, corylifols D (1) and E (2), along with four known ones. The structures of 1 and 2 were determined by extensive 1D and 2D NMR and MS data analyses. When tested against HepG2 and Hep3B hepatocellular carcinoma cell lines, corylifol A (4) displayed IC50 values of 4.6 and 13.5 μg/ml, respectively. © 2013 Copyright Taylor and Francis Group, LLC.

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