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Intermolecular Stetter reaction of aromatic aldehydes with(E)-(2-nitrovinyl)cyclohexane induced by N-heterocyclic carbene and thiourea

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Chinese Chemical letters 2016年第7期27卷 1032-1035页

作者： qing-fang Cheng jing-Wen Wang Qi-fa Wang Zhou liu Jiangsu Key laboratory of Marine Biotechnology Huaihai Institute of Technology School of Chemical Engineering Huaihai Institute of Technology

Intermolecular Stetter reaction of aromatic aldehydes with（E）-（2-nitrovinyl）cyclohexane catalyzed by thiazolium A has been *** reaction rate and efficiency are profoundly impacted by the presence of thiourea *** r... 详细信息

关键词： Intermolecular Stetter reaction N-heterocyclic carbene Thiourea Thiazolium Nitroalkene β-Nitro ketone

Decomposition of dimethyl sulfide in a wire-cylinder pulse corona reactor

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第1期10卷 127-132页

作者： Jian-tao YANG Yao SHI Jie CHEN qing-fa SU Da-hui WANG jing CAO Department of Environmental Science Zhejiang University Hangzhou 310028 China

Decomposition of dimethyl sulfide (DMS) in air was investigated experimentally by using a wire-cylinder dielectric barrier discharge (DBD) reactor at room temperature and atmospheric pressure.A new type of high pulse voltage source with a thyratron switch and a Blumlein pulse-forming network (BPFN) was adopted in our *** maximum power output of the pulse voltage source and the maximum peak voltage were 1kW and 100kV,*** important parameters affecting odor decomposition,including peak voltage,pulse frequency,gas flow rate,initial concentration,and humidity,which influenced the removal efficiency,were *** results showed that DMS could be treated effectively and almost a 100% removal efficiency was achieved at the conditions with an initial concentration of 832mg/m3 and a gas flow rate of 1000ml/*** boosts the removal efficiency and improves the energy yield (EY) *** EY of 832mg/m3 DMS was 2.87mg/kJ when the relative humidity was above 30%.In the case of DMS removal,the ozone and nitrogen oxides were observed in the exhaust *** carbon and sulfur elements of DMS were mainly converted to carbon dioxide,carbon monoxide and sulfur ***,sulfur was discovered in the *** to the results,the optimization design for the reactor and the matching of high pulse voltage source can be reckoned.

关键词： Pulse corona discharge Blumlein pulse-forming network (BPFN) Decomposition Dimenthyl sulfide (DMS) Specific energy density Energy yield (EY)

New Matrix lie Algebra, a Powerful Tool for Constructing Multi-component C-KdV Equation Hierarchy

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Communications in Theoretical Physics 2006年第4期45卷 587-592页

作者： YU fa-Jun ZHANG Hong-qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

A set of new multi-component matrix lie algebra is constructed, which is devoted to obtaining a new loop algebra A^-2M. It follows that an isospectral problem is established. By making use of Tu scheme, a liouville integrable multi-component hicrarchy of soliton equations is generated, which possesses the *** Hamiltonian structures. As its reduction cases, the multi-component C-KdV hierarchy is given. Finally, the *** integrable coupling system of C-KdV hierarchy is presented through enlarging matrix spectral problem.

关键词： matrix lie algebra liouville integrable integrable coupling

lncRNA SNHG12 ameliorates brain microvascular endothelial cell injury by targeting miR-199a

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Neural Regeneration Research 2018年第11期13卷 1919-1926页

作者： fa-qing long qing-Jie Su jing-Xia Zhou De-Sheng Wang Peng-Xiang li Chao-Sheng Zeng, Yi Cai The Second Affiliated Hospital of Hainan Medical University Haikou Hainan Province China

long non-coding RNAs regulate brain microvascular endothelial cell death, the inflammatory response and angiogenesis during and after ischemia/reperfusion and oxygen-glucose deprivation/reoxygenation（OGD/R） insults. The long non-coding RNA, SNHG12, is upregulated after ischemia/reperfusion and OGD/R in microvascular endothelial cells of the mouse brain. However, its role in ischemic stroke has not been studied. We hypothesized that SNHG12 positively regulates ischemic stroke, and therefore we investigated its mechanism of action. We established an OGD/R mouse cell model to mimic ischemic stroke by exposing brain microvascular endothelial cells to OGD for 0, 2, 4, 8, 16 or 24 hours and reoxygenation for 4 hours. Quantitative real-time polymerase chain reaction showed that SNHG12 levels in brain microvascular endothelial cells increased with respect to OGD exposure time. Brain microvascular endothelial cells were transfected with pc DNA-control, pc DNA-SNHG12, si-control, or si-SNHG12. After exposure to OGD for 16 hours, these cells were then analyzed by 3-（4,5-dimethyl-2-thiazolyl）-2,5-diphenyl-2-H-tetrazolium bromide, trypan blue exclusion, western blot, and capillary-like tube formation assays. Overexpression of SNHG12 inhibited brain microvascular endothelial cell death and the inflammatory response but promoted angiogenesis after OGD/R, while SNHG12 knockdown had the opposite effects. miR-199a was identified as a target of SNHG12, and SNHG12 overexpression reversed the effect of miR-199a on brain microvascular endothelial cell death, the inflammatory response, and angiogenesis. These findings suggest that SNHG12 suppresses endothelial cell injury induced by OGD/R by targeting miR-199a.

关键词： nerve regeneration ischemic stroke microRNA brain microvascular endothelial cell death inflammatory response angiogenesis oxygen-glucose deprivation/reoxygenation ischemia/reperfusion therapeutic targets neural regeneration gene regulation neural regeneration

Constructing New Discrete Integrable Coupling System for Soliton Equation by Kronecker Product

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Communications in Theoretical Physics 2008年第9期50卷 561-564页

作者： YU fa-Jun ZHANG Hong-qing College of Maths and Systematic Science Shenyang Normal University Shenyang 110034 China Department of Mathematics Dalian University of Technology Dalian 116024 China

It is shown that the Kronecker product can be applied to constructing new discrete integrable couplingsystem of soliton equation hierarchy in this paper.A direct application to the fractional cubic Volterra lattice spectralproblem leads to a novel integrable coupling system of soliton equation *** is also indicated that the study ofdiscrete integrable couplings by using the Kronecker product is an efficient and straightforward *** methodcan be used generally.

关键词： Kronecker product fractional cubic Volterra lattice equation discrete integrable couplings

Analytical Solution of Weak-Coupling Periodically Driven Two-level System

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Communications in Theoretical Physics 2008年第4期49卷 1025-1028页

作者： ZHOU qing-Ping faNG Mao-fa College of Information Management and Engineering Jishou University Zhangjiajie 427000 China College of Physics and Information Science Hunan Normal University Changsha 410081 China

We present an approximate analytical solution to periodically driven two-level system in the weak-coupling regime. The analytical solution is in good agreement with the exact numerical solution in resonance and near r... 详细信息

关键词： periodically driven two-level systems analytical solution weak-coupling regime

Upper Triangular Matrix of lie Algebra and a New Discrete Integrable Coupling System

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Communications in Theoretical Physics 2007年第3期47卷 393-396页

作者： YU fa-Jun ZHANG Hong-qing Department of Applied Mathematics Dalian University of Technology Dalian 116024 China

The upper triangular matrix of lie algebra is used to construct integrable couplings of discrete solition equations. Correspondingly, a feasible way to construct integrable couplings is presented. A nonlinear lattice soliton equation spectral problem is obtained and leads to a novel hierarchy of the nonlinear lattice equation hierarchy. It indicates that the study of integrable couplings using upper triangular matrix of lie algebra is an important step towards constructing integrable systems.

关键词： upper triangular matrix lie algebra integrable coupling system

Enhancive effect of N,N'-dinitrosopiperazine on inducing precancerous lesion on nasal and/or nasopharyngeal epithelia of TgN(p53mt-lMP1)/HT mice

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第3期10卷 172-179页

作者： Dao-fa TIAN Ying-chun HE fang-guo lU fa-qing TANG faculty of Integrative Medicine Changsha 410007 China) faculty cf Basic Medicine Chinese Medicine University of Hunan Changsha 410007 China Department of Clinical laboratory the First Xiangya Hospital Central South University Changsha 410008 China

Objective： To investigate the enhancive effect ofN, N′-dinitrosopiperazine （DNP） on induced carcinogenesis in nasal and/or nasopharyngeal epithelia among TgN（p53mt-lMP1）/HT transgenic mice to examine the underlying mechanism for the development of nasopharyngeal carcinoma （NPC）. Methods： TgN（p53mt-lMP1）/HT transgenic mice and the same strain of C57Bl/6J wild-type mice both at the age of 5 months were randomly divided into 2 groups in parallel, respectively, i.e., TgN（p53mt-lMP1）/HT cancerous lesion-inducing group （T1）, TgN（p53mt-lMP1）/HT control group （TC）, C57Bl/6J cancerous lesion-inducing group （CI）, and C57Bl/6J control group （CC）. TI and CI mice were treated only with DNP for 16 weeks, twice each week, while TC and CC mice were given the same volume of saline as *** the end of treatment, animals were sacrificed to collect epithelial tissue samples from nasal cavity and nasopharynx for pathohistological evaluation by hacmatoxylin and eosin （HE） staining and for determination on the expression ofTRAF2, c-Jun, and p 16 by immunohistochemistry. Results： Atypical hyperplasia was more significant in the samples of TI than in those of TC, CI, and CC, with the rates of lesions being 90%, 10%, 0, and 0 （P〈0.01） respectively, though DNP was used alone in a much shortened inducing period at less dosage and without the use of carcinogenic promoter 12-0-tetradecanoylphorbol-13-acetate as usual. The expressions of tumor necrosis factor （TNF） receptor-associated factor 2 （TRAF2） and c-Jun in these samples were significantly up-regulated in TI （P〈0.0 I）, while tbe expression of p16 was significantly lower in TI than in the other groups （P〈0.01）. Conclusion： TgN（p53mt-lMPI）/HT mice hold inherited constitutional defect in immune surveillance function, which can be aggravated by environmental carcinogens, such as DNP used even though in a much less strength. The enhanced carcinogenesis-inducing effect of DNP on TgN（p53mt-lMP1）/HT mice should be closely associated with abn

关键词： Nasal epithelia Nasopharyngeal epithelia Precancerous lesions N N′-dinitrosopiperazine (DNP) Activator protein-1(AP- 1) pathway Signal transduction

Triphenylphosphine-catalyzed isomerization of alkynyl ketones in aqueous solution

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Chinese Chemical letters 2007年第9期18卷 1029-1032页

作者： qing fa Zhou Fei Yang qing Xiang Guo Song Xue Department of Chemistry University of Science and Technology of China Hefei 230026 China

An efficient isomerization of alkynyl ketones to (E,E)-diene ketones was developed. The reaction catalyzed by 20 mol% triphenylphosphine in aqueous media gave the desired products in good yields.

关键词： Triphenylphosphine Isomerization Alkynyl ketones Water