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Search Results: 1 - 10 of 78271 matches for " Meiwei Chen "
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The minimal dimensions of faithful representations for Heisenberg Lie superalgebras
Meiwei Chen,Wende Liu
Mathematics , 2013,
Abstract: This paper aims to characterize the minimal dimensions and super-dimensions of faithful representations for the Heisenberg Lie superalgebras over an algebraically closed field of characteristic zero.
Effect of preparation methods on the adsorption propertyof municipal solid waste-based carbon materials
Song MinTang XinhongTang MeiWei Yuexing
- , 2016, DOI: 10.3969/j.issn.1003-7985.2016.02.013
Abstract: Three different preparation methods including steam physical activation, catalytic carbonation and KOH chemical activation methods were used to prepare municipal solid waste-based carbon materials. The methylene blue(MB)adsorption value was applied to evaluate the adsorption capabilities of the prepared carbon materials. The effects of preparation methods on adsorption capability and yield of products were investigated. The yield of carbon materials with the catalytic carbonation method is the highest, and the KOH activation method is the second level. Considering the adsorption performance, the KOH activation method is much more favorable. Among the different components of municipal solid waste-based carbon materials, the adsorption properties of the single component of paperboard, the double components of tire and paperboard, the triple components of tire, paperboard and polyvinyl chloride(PVC), and the multi-component mixtures are better than those of other single-, double-, triple- and multi-component mixtures, respectively.
Eriocaulon buergerianum extract protects PC12 cells and neurons in zebrafish against 6-hydroxydopamine-induced damage
Meiwei Wang, Zaijun Zhang, Lorita Cheang, Zhixiu Lin, Simon Lee
Chinese Medicine , 2011, DOI: 10.1186/1749-8546-6-16
Abstract: The viability of dopaminergic (DA) neuron in zebrafish was examined by anti-tyrosine hydroxylase (TH) immunostaining. The locomotor activity of zebrafish was assessed with a digital video tracking system. The viability and cellular damage of the PC12 cells were determined by MTT and LDH assays respectively. The nuclear morphological changes in apoptotic cells were evaluated with DNA staining by Hoechst 33342 dye. Intracellular nitric oxide (NO) was quantified by DAF-FM diacetate staining. The expression of inducible nitric oxide synthase (iNOS) was determined by Western blot.EBE inhibited the 6-OHDA-induced decrease in total distance of movement in zebrafish. Pretreatments of EBE (25, 50, 100 and 200 μg/ml) increased the viability of 6-OHDA-damaged PC12 cells in a dose dependent manner. Protection against 6-OHDA-induced nuclear fragmentation and accumulation of apoptotic bodies was also observed in EBE pretreated cells. Anti-oxidative (inhibition of NO production and iNOS expression in PC12 cells in vitro) activities of EBE are related to its neuroprotective effects in 6-OHDA-induced DA neuron damage.EBE exhibited significant neuroprotective activities in zebrafish, including recovery of dopaminergic neuron loss caused by 6-OHDA in a dose-dependent manner in vivo, inhibition of 6-OHDA-induced decrease of total distance in movement in zebrafish. The iNOS-NO pathway may be involved.A hydroxylated analogue of dopamine, namely 6-Hydroxydopamine (6-OHDA) which induces damage of dopaminergic neurons in vivo and in vitro, is commonly used in model systems to mimic Parkinson's disease of which the main neuropathological feature is the loss of substantia nigra pars compacta (SNpc) dopaminergic (DA) neurons. The toxic effects of 6-OHDA are mainly attributed to the formation of free radicals, inflammatory processes and apoptosis [1,2].Early studies indicated that NO participated in cellular signaling pathways regulating broad aspects of brain functions, such as synaptic plasti
TNE CHANGE OF NUCLEIC ACID AND PROTEIN DURING GROWTH OF NICOTIANA TABACUM BAIBAILI CAIIUS WITH DIFFERENT DIFFERENTIATION
不同分化状态的白百利烟草愈伤组织在生长过程中核酸蛋白质的变化

Zhang Kerong,Sun Tao,Lu Meiwei,Li Yumin,Ni Dexiang,Sun Hongqiao,
张克荣
,孙涛,李玉民,吕美薇,倪德祥,孙鸿乔

植物科学学报 , 1990,
Abstract: This paper studied the change of DNA, RNA and protein during growth of callus of Baibaili tobacco (Nicotiana tabacum Baihaili) with bad, root aud both bud and root differentiation respectively. The culture media containing MS+NAA 0.2 mg/l+KT 0.2 mg/l, MS+NAA 0.05 mg/l+KT 2 mg/l and MS+NAA 0.5 mg/l+KT 0.05 mg/l respectively induced Baibaili tobacco callus to he both bud and root, bud, and root organogensis. The peaks of DNA, RNA and protein in callus with bud differentiation and the peaks of RNA and protein in root differentiation were five days later than the peaks of DNA, RNA and protein in callus with both bud and root; The peak of DNA in callus with root differentiation was the same as in callus with both bud and root differentiation. It seems that the influence of exogenous growth regulators inducing orientation organogensis is on RNA.There was notable different in the compositions of soluble protein of callus with bud, root and both bud and root differentiation. It also seems that 41 KD and 46 KD proteins might have important actions in orientation organogensis.
Research on the Incentive Mechanism of Hidilao Hotpot’s Employees Based on Grounded Theory  [PDF]
Chen Chen
Journal of Human Resource and Sustainability Studies (JHRSS) , 2018, DOI: 10.4236/jhrss.2018.61031
Abstract: The traditional classical incentive model only reveals the general rule of organizational incentive, and does not give specific operation rules. The matching between organizational incentives and employee needs is still black box, and it does not reveal its core operation mechanism from the perspective of mechanism. This paper took through the literature review, the Hidilao Hotpot company as a case study, through a variety of ways to collect data, the use of grounded theory to encode data analysis, and ultimately extracted 58 concepts, 26 sub-areas, 7 main areas, concluded that the Hidilao Hotpot Employee motivation formed the path, and ultimately extracted the micro-level employee motivation mechanism model. The research result of this article comes from the practice of the enterprise, which has enlightenment to the organizational incentive of the traditional catering industry and also provides a micro-research perspective and systematic mechanism research for the incentive field.
Digital Image Watermarking Based on Mixed Error Correcting Code  [PDF]
Yonghong Chen, Jiancong Chen
Journal of Information Security (JIS) , 2012, DOI: 10.4236/jis.2012.32018
Abstract: In this paper, we present a novel technique based on a mixed Error Correcting Code(ECC)-the convolutional code and the repetition code to enhance the robustness of the embedded watermark. Before embedding, the binary watermark is scanned to one-dimension sequence and later inputted into the (3, 1, 2) convolutional encoder and (3, 1) repetition encoder frame by frame, which will improve the error correcting capability of decoder. The output code sequence is scanned to some matrixes as the new watermark messages. The watermarking is selected in low frequency band of the Discrete Wavelet Transform (DWT) and therefore it can resist the destruction of image processing. Experimental results are presented to demonstrate that the robustness of a watermark with mixed ECC is much higher than the traditional one just with repetition coding while suffering JPEG lossy compression, salt and pepper noise and center cutting processing.
Operator Equation and Application of Variation Iterative Method  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.38127
Abstract: In this paper, we study some semi-closed 1-set-contractive operators A and investigate the boundary conditions under which the topological degrees of 1-set contractive fields, deg (I-A, Ω, p) are equal to 1. Correspondingly, we can obtain some new fixed point theorems for 1-set-contractive operators which extend and improve many famous theorems such as the Leray-Schauder theorem, and operator equation, etc. Lemma 2.1 generalizes the famous theorem. The calculation of topological degrees and index are important things, which combine the existence of solution of for integration and differential equation and or approximation by iteration technique. So, we apply the effective modification of He’s variation iteration method to solve some nonlinear and linear equations are proceed to examine some a class of integral-differential equations, to illustrate the effectiveness and convenience of this method.
Blow-Up and Attractor of Solution for Problems of Nonlinear Schrodinger Equations  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312263
Abstract: In this paper, the authors study the blow-up of solution for a class of nonlinear Schrodinger equation for some initial boundary problem. On the other hand, the authors give out some analyses and that new conclusion by Eigen-function method. In last section, the authors check the nonlinear parameter for light rule power by using of parameter method to get ground state and excite state correspond case, and discuss the global attractor of some fraction order case, and combine numerical test. To illustrate this physics meaning in dimension d = 1, 2 case. So, by numerable solution to give out these wave expression.
Some Approximation in Cone Metric Space and Variational Iterative Method  [PDF]
Ning Chen, Jiqian Chen
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312276
Abstract: In this paper, we give some new results of common fixed point theorems and coincidence point case for some iterative method. By using of variation iteration method and an effective modification of He’s variation iteration method discusses some integral and differential equations, we give out some new conclusion and more new examples.
Photoconductive Effect of Liquid and Utilization of Solar Energy  [PDF]
Ziwei Chen, Shihao Chen
Open Journal of Physical Chemistry (OJPC) , 2014, DOI: 10.4236/ojpc.2014.41003
Abstract:

Experiments described in this paper show that there is the photoconductive effect of liquid, i.e. when light shines into a sort of alkali, acid or salt solution, the conductivity of the solution will increase. The mechanism of the effect is explained as follows. When hydrated ions in the solution absorb photons with their high enough energies, they will decompose to naked ions and water-molecules. The naked ions can reach an anode or a cathode more easily and faster than the hydrated ions; It is possible that when a molecule in the solution absorbs a photon with its high enough energy, it will decompose to negative and positive ions. Based on the effect, a device producing hydrogen by the solar-energy had been devised.

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