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Tianjin, China

Tianjin University of Commerce is a university in Tianjin, China under the municipal government. Tianjin University of Commerce was established in 1980. After two decades of construction and development, it has become an advanced university with undergraduate and postgraduate programs specialising in economics, stration, engineering, law, liberal arts and science.The University is located by the Ziya River in Tianjin and covers an area of 600,000 m2 including 500,000 m2 of teaching and dormitory space. The campus is clean and tidy with first-rate facilities providing excellent conditions for working, studying and researching. Wikipedia.


Song C.-Y.,Tianjin University of Commerce
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2013

Under different conditions, sodium chloride crystals were colored electrolytically using an electrolysis apparatus with a pointed anode and a flat cathode. A lot of V, F, colloid C and N color centers were produced in colored crystals. Systematic spectral measurements were carried out to colored crystals. Parameters of absorption spectral bands of color centers were determined. Influence of different electrolysis conditions to color center concentration was studied. Current time curves were measured. Calculated value of activation energy of V color centers less than F color centers, and formation mechanism of color center was explained. Source


Guan W.,Tianjin University of Commerce | Fan X.,U.S. Department of Agriculture | Yan R.,National Engineering And Technology Research Center For Preservation Of Agri Products
Food Control | Year: 2013

Mushrooms are prone to microbial spoilage and browning during growing and processing. Ultraviolet light (254nm, UV-C) has been used as an alternative technology to chemical sanitizersfor food products. Hydrogen peroxide (H2O2) is classified as generally recognized as safe for use in foods as a bleaching and antimicrobial agent, and could control the bacterial blotch and browning of mushrooms. This study investigated the effects of water wash (control), 3% H2O2 wash, 0.45kJm-2 UV-C, and combination of H2O2 and UV-C (H2O2+UV) on microbial loads and product quality of mushrooms during storage for 14 days at 4°C. Additionally, the inactivation of Escherichia coli O157:H7 inoculated on mushrooms was determined. Results showed that water wash, H2O2, UV-C and H2O2+UV resulted in 0.44, 0.77, 0.85, and 0.87logsCFUg-1 reduction of E.coli O157:H7, respectively. Hydrogen peroxide, UV-C and the combination reduced total aerobic plate counts on the surface of mushrooms by 0.2-1.4logsCFUg-1 compared to the control, while there was no significant difference among the three treatments during storage. After storage, UV-C treated mushrooms had similar L* and a* values as the control while H2O2 and H2O2+UV-C treated mushrooms had higher L* (lighter) and lower a* (less brown) values than the control. Compared to water wash, all the treatments inhibited lesion development on the mushroom surface on day 14. The combination of H2O2 and UV achieved the best overall dual control of lesion and browning. There was no significant difference in ascorbic acid and total phenolic content among the treatments. Overall our results suggested that H2O2+UV reduced microbial loads, and extended storage life by reducing lesion development without causing deterioration in nutritional quality of button mushrooms. Therefore, when properly utilized, H2O2+UV could potentially be used for maintaining postharvest quality while marginally reducing populations of E.coli O157:H7 and background microflora. © 2013. Source


Liang X.P.,Tianjin University of Commerce
Applied Mechanics and Materials | Year: 2014

In the development process of regional economy, the adequate supply of public services can create a good environment, promote endogenous growth and improve the government's governance ability in public affairs. This paper mainly analyzes the function of public services in regional economy by taking Tianjin as an example. © (2014) Trans Tech Publications, Switzerland. Source


Shi Y.,Tianjin University of Commerce
Applied Biochemistry and Biotechnology | Year: 2014

Degradation of fermentable monosaccharides is one of the primary concerns for acid prehydrolysis of lignocellulosic biomass. Recently, in our research on degradation of pure monosaccharides in aqueous SO2 solution by gas chromatography (GC) analysis, we found that detected yield was not actual yield of each monosaccharide due to the existence of sugar-bisulfite adducts, and a new method was developed by ourselves which led to accurate detection of recovery yield of each monosaccharide in aqueous SO2 solution by GC analysis. By the use of this method, degradation of each monosaccharide in aqueous SO2 was investigated and results showed that sugar-bisulfite adducts have different inhibiting effect on degradation of each monosaccharide in aqueous SO2 because of their different stability. In addition, NMR testing also demonstrated possible existence of reaction between conjugated based HSO3 - and aldehyde group of sugars in acid system. © 2013 Springer Science+Business Media. Source


Li S.,Tianjin University of Commerce
Mathematical and Computer Modelling | Year: 2011

By letting on times and off times be unrelated convex fuzzy variables, an alternating renewal process only with fuzziness is established. Using the α-pessimistic value and the α-optimistic value of fuzzy variables, the asymptotic behaviors of on time per unit time and off time per unit time are given. © 2011 Elsevier Ltd. Source

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