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Shangqiu, China

Li M.,Shangqiu Normal College
Chinese Journal of Tissue Engineering Research | Year: 2013

Background: Researches indicate nitric oxide plays a crucial role in tendon healing. Objective: To summarize the progress of recent researches on the nitric oxide and tendon healing. Methods: A computer-based online search of related papers from January 1992 to December 2011 was performed in PubMed database using the key words "nitric oxide, tendon, healing" in English, and in CNKI database using the key words of "nitric oxide, tendon, healing" in Chinese from January 1995 to December 2011. Totally 115 articles were found, and finally 37 articles were included in result analysis. RESULTS ADN CONCLUSION: In normal tendons, there is no expression of nitric oxide synthase; however, in injured tendons, there is a significant increase in nitric oxide synthase activity at different time. When this activity is inhibited, tendon healing is impaired. When nitric oxide, in the correct doses, is added, tendon healing is enhanced. Nitric oxide may play a role in controlling inflammation and extracellular matrix metabolism, which improves the symptoms, signs, quality and function of the tendon. Source


Liu Q.F.,Shangqiu Normal College
Advanced Materials Research | Year: 2014

Bench and pilot scale pre-oxidation treatment runs were performed on the raw water samples from micro-polluted reservoir. Bench experimental results showed that the particles with large size decreased when ozone pre-oxidation was applied, meanwhile, the organic matters with unsaturated chemical bonds decreased obviously. Pilot experimental results showed that turbidity, UV254, CODMn and total coliform could be treated efficiently by ozone pre-oxidation combined with traditional technologies, but the effectiveness of DOC removal is not obvious. © (2014) Trans Tech Publications, Switzerland. Source


Liu Q.F.,Shangqiu Normal College
Advanced Materials Research | Year: 2014

In the synthesis of 2-ethoxycarbonyl-3, 4-diethyl-pyrrole (1) by the Barton-Zard reaction of 4-acetoxy-3-nitrohexane (1b) with ethyl isocyanoacetate, the organic base 1, 8-diazabicyclo [5.4.0] undec-7-ene (DBU) and the solvent tetrahydrofuran (THF) were replaced with K2CO3 and ethanol, respectively. Moreover, the preparation of the intermediate 1b from 1a by acetylation reaction was carried out by employing acetyl chloride in boiling toluene solution instead of acetic anhydride and the catalyst concentrated sulfuric acid. After treatment of 1 with excess LiAlH4 at low temperature, the crude product 1c (α-hydroxymethyl-3, 4-diethyl-pyrrole) was immediately reacted via a tetramerization in the presence of the catalyst BF3.OEt2 in crude CHCl3, followed by oxidation of 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone (DDQ) to provide the corresponding octaethylporphyrin 2. The results indicate that using BF3.OEt2 as catalyst instead of p-toluenesulphonic acid (p-TsOH) in the synthesis of 2 from 1c can obviously increase the yield of product 2 up to 80% from 69%. © (2014) Trans Tech Publications, Switzerland. Source


Wang Y.,Zhoukou Normal University | Wang C.,Shangqiu Normal College
International Journal of Security and its Applications | Year: 2015

This paper analyzes the present situation of the current network security problems and points out the research and development of intrusion detection system has very important significance on the basis of comparative analysis of the traditional static security model and PPDR dynamic security model, and according to this model, using ant colony algorithm is a distributed computing network intrusion of metrics, the determination of index contrast and invasion route, increase the accuracy of testing operation and calculation results show that the effectiveness of the solution and the convergence speed. For distributed network intrusion is put forward a new kind of means. © 2015 SERSC. Source


Han X.-Q.,Shangqiu Normal College
Wuli Xuebao/Acta Physica Sinica | Year: 2014

The ab initio configuration interaction method and coupled-cluster theory have been used to optimize the possible ground-state structures of SiF2. The method QCISD/6-311G(2df) is most suitable for the calculation of SiF2 by comparing the experimental value and the calculated value; and the calculated equilibrium structure, harmonic frequency, dissociation energy, force-constant are in good agreement with the experimental data. The potential energy functions of SiF2 have been derived from the many-body expansion theory. In the symmetry of stretching vibration and rotation potential energy diagram of SiF2, there is a saddle point in the reaction kinetics SiF+F→SiF2. A stable SiF2 molecule could be formed when F atom with an energy surpassing 4.38 eV. These are completely reported so far as we know for the first time. In addition, it is found that a stable SiF2 molecule could be formed through two equivalent channels of SiF+F→SiF2. And the reaction is endothermic with a threshold energy. © 2014 Chinese Physical Society. Source

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