Guangxi Colleges and Universities

Chongzuo, China

Guangxi Colleges and Universities

Chongzuo, China
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Su L.,Guangxi Medical University | Su L.,Guangxi Colleges and Universities | Shen T.,Guangxi University | Liang B.,Guangxi University | And 6 more authors.
Gene | Year: 2015

Background: Stroke is a multi-factorial disorder and has become the leading cause of death and disability worldwide. Recent genome-wide association studies (GWAS) have identified a significant association of single-nucleotide polymorphism (SNP) rs2107595 in HDAC9 gene with large-vessel ischaemic stroke (IS) in the European populations. The aim of this study is to examine the association of HDAC9 gene rs2107595 polymorphism with the susceptibility of IS in southern Han Chinese. Methods: A case-control study was conducted in Chinese Han population, with a total of 1632 subjects including 816 stroke patients and 816 controls. Sequenom MassARRAY iPLEX was used to genotype the SNP rs2107595 in HDAC9 gene. Genetic association analysis between genotypes and risk of IS was evaluated by PLINK program. Results: No significant association was found between the SNP rs2107595 and IS in the additive, dominant, recessive and allelic models (all p> 0.050). For IS-related quantitative traits in the sex-stratified analysis, the results showed a significant association between rs2107595 and serum TG level of males in the additive model (padj= 0.008) and the dominant model (padj= 0.003), and a significant association of rs2107595 polymorphism with serum TC level of females in the additive model (padj= 0.045) and the dominant model (padj= 0.037). Conclusions: Our results indicate that HDAC9 variant rs2107595 may be not associated with IS risk in southern Han Chinese. However, the rs2107595 polymorphism may be associated with serum TC and TG level of IS patients. © 2015 Elsevier B.V.


Jiang X.,Guangxi University of Science and Technology | Jiang X.,Guangxi University | Jiang X.,Guangxi Colleges and Universities | Yang W.,Liuzhou LMZ Co. | And 4 more authors.
Biotechnology | Year: 2016

Background: The optimal parameters of separation and purification of polyphenols from Pericarpium Granati were determined and the antibacterial activities against S. mutans in vitro were investigated. Methodology: Through comparing the static adsorption/desorption properties of five kinds of tested macroporous resins for polyphenols, HPD-450 resin was selected to investigate optimal purification parameters by dynamic curve experiments. The optimal purification conditions as follows: 9.0 BV of feeding solution at concentration of 3.2 mg mL-1 through the column at 3.0 BV h-1, then for desorption 60% ethanol-aqueous 3.5 BV at 2.0 BV h-1 eluted. The content of polyphenols was increased from 34.9±1.6% to 71.1±3.1% with a recovery yield of 85.5±3.7% according to the optimal parameters. Results: The present study showed that the MIC of purity of polyphenols was 6.25 mg mL-1. The acidogenicity of S. mutans can be significantly inhibited when the concentration was up to or higher than 1.56 mg mL-1 and the adherence of S. mutans can be significantly inhibited when the concentration was up to or higher than 3.13 mg mL-1 as well. Conclusion: The results demonstrated that polyphenols from Pericarpium Granati have significant activity against S. mutans and it is a good candidate for further development as an oral care agent for preventing dental caries. © 2016 Xudong Jiang et al.


Jiang Y.,Guangxi University | Chen W.-H.,Guangxi University | Chen W.-H.,Guangxi Colleges and Universities | Luo S.,Guangxi University
Chinese Control Conference, CCC | Year: 2015

In this paper, we consider the stabilization problem of stochastic delayed neural networks (SDNNs) via periodically intermittent control. Based on a time-varying piecewise Lyapunov functional approach, a mean-square exponential stability criterion for the intermittently controlled SDNNs is firstly obtained and formulated in the form of linear matrix inequalities (LMIs). The relationship among the control period, the control width, and the upper bound on time-delay is built. Then, a sufficient condition on the existence of periodically intermittent state-feedback controllers is derived by employing the obtained stability criterion. The controller gains can be designed by solving a set of LMIs. Finally, a illustrated example is given to show the effectiveness of the proposed intermittent control method. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Luo S.,Guangxi University | Chen W.-H.,Guangxi University | Chen W.-H.,Hubei Normal University | Chen W.-H.,Guangxi Colleges and Universities | And 2 more authors.
Chinese Control Conference, CCC | Year: 2015

In this paper, the stabilization problem of a class of diffusion neural networks via periodically intermittent sampleddata control is studied. It is assumed that the measurement of the states are taken in a finite number of fixed sampling points in the spatial domain and continuous in time. In the proposed control method, sampled-data control is only activated in 'work time', rather than during the whole time. A sufficient condition for the existence of periodically intermittent sampled-data controllers is derived in terms of linear matrix inequalities (LMIs). The obtained condition establishes a quantitative relation among the control period, the control width, and the upper bound on the spatial sampling intervals. Finally, a numerical example is provided to illustrate the effectiveness of the proposed theoretical result. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Wang M.,Guangxi University | Wang M.,Guangxi Colleges and Universities | Luo H.,Guangxi University | Luo H.,Guangxi Colleges and Universities | And 4 more authors.
Journal of Organometallic Chemistry | Year: 2015

DFT studies on Rh2(Piv)4-catalyzed cycloadditions of 1,2,3-triazoles with isocyanates or isothiocyanates show that 1, 2, 3-triazoles undergo ring opening → coordination of Rh2(Piv)4 → dissociation of N2 to give Rh2(Piv)4-azavinyl carbene, where Rh2(Piv)4 exerts a stabilizing effect on azavinyl carbene. The formed Rh2(Piv)4-azavinyl carbene prefers to nucleophilically cyclize with CN bond of isocyanatobenzene to give the imidazolone, rather than CO bond of isocyanatobenzene to give the oxazolimine. In comparison, Rh2(Piv)4-azavinyl carbene preferentially cyclize with CS bond of isothiocyanatobenzene to give the thiazole, instead of CN bond of isothiocyanatobenzene to give the thioimidazolone. The nucleophilic capacity follows CS > CN > CO trend, which is the key selective origin of these reactions. The presence of Rh2(Piv)4 would help to form the carbene and to stabilize it via donating its d-electron into the azavinyl carbene, which is another selective origin of these reactions. © 2015 Elsevier B.V.All rights reserved.


Wu X.,Guangxi University | Wu W.,Guangxi University | Wu W.,Guangxi Colleges and Universities | Zhou Y.,Guangxi University | And 3 more authors.
Powder Technology | Year: 2015

The SnO2-Fe2O3 composite is synthesized by a hydrothermal method in ethanol-water solution. When evaluated as anode materials for Na-ion battery, the SnO2-Fe2O3 composite sample obtained at 400°C could deliver a discharge capacity of 313.1mAhg-1 after the 30th cycle at 25mAg-1, which corresponds to 104.5% of the 2nd discharge capacity. Coulombic efficiency is 95% in the 30th cycle. At the same time, SnO2-Fe2O3 composite is also an excellent anode material for Li-ion battery, which can deliver initial discharge and charge capacities of 1643 and 1120mAhg-1 at 200mAg-1, respectively. Such excellent performance is a result of the formation of mesopores and large specific surface area of the SnO2-Fe2O3 composite. © 2015 Elsevier B.V.


Yang Z.-D.,Guangxi University | Yang Z.-D.,Guangxi Colleges and Universities | Sun Y.-J.,Guangxi University | Yu S.-Z.,Guangxi University | Zheng X.-L.,Guangxi University
Journal of Animal and Plant Sciences | Year: 2015

Coloana cinerea Dworakowska (Homoptera: Cicadellidae) is a phloem-feeding pest on Bischofia javanica Blume (Euphorbiales: Euphorbiaceae), which is the main species of avenue tree in the urban landscape of China. Understanding their relationship is conducive to exploring the coevolution of both of them and the effective management of insect pests. In this study, their interaction was studied from a protective enzyme perspective. Results showed that Catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) activities in B. javanica leaves were evidently enhanced by population density, feeding duration and their interaction of C. cinerea. CAT, POD, SOD, glutathione S-transferase (GST) and amylase (AMY) in C. cinerea were conversely affected by foliage maturity of B. javanica, feeding duration and their interaction. These changes in physiological compositions of both C. cinerea and B. javanica following stress or damage suggest that they have coevolved to an adaptation against each other. © 2015, Pakistan Agricultural Scientists Forum. All rights reserved.


Chen W.,Guangxi University | Wu W.,Guangxi University | Wu W.,Guangxi Colleges and Universities | Liu S.,Guangxi University | And 5 more authors.
Materials Science in Semiconductor Processing | Year: 2015

Co0.5Mn0.5-xNixFe2O4 (0.0≤x≤;0.3) precursor is obtained by solvothermal method at 160 °C in glycol-water. Cubic Co0.5Mn0.5-xNixFe2O4 is obtained by calcining the precursor from 600 °C to 800 °C in air. The precursor and its calcined products are characterized by thermogravimetry and differential scanning calorimetry, X-ray powder diffraction, scanning electron microscopy, and vibrating sample magnetometer. A high-crystallized rod-like Co0.5Mn0.5-xNixFe2O4 with a cubic structure is obtained when the precursor is calcined at 800 °C in air for 2 h. Lattice parameters decrease with the increase of Ni2+ addition amount. The magnetic properties of Co0.5Mn0.5-xNixFe2O4 depend on Ni2+ doped amount and calcination temperature. Co0.5Mn0.3Ni0.2Fe2O4 obtained at 800 °C has the highest specific saturation magnetization value, 63.51 emu/g. However, Co0.5Mn0.3Ni0.2Fe2O4 obtained at 600 °C has the highest coercivity value, 1204.02 Oe. © 2015 Elsevier Ltd.


Wu X.,Guangxi University | Wu W.,Guangxi University | Wu W.,Guangxi Colleges and Universities | Qin L.,Guangxi University | And 4 more authors.
Journal of Magnetism and Magnetic Materials | Year: 2015

La3+-doped Ni-Zn ferrites with a nominal composition of Ni0.5Zn0.5LaxFe2-xO4 (where x=0-0.3) are prepared by solid-state reaction at low temperatures. X-ray diffraction data shows that single phase Ni0.5Zn0.5Fe2O4 is obtained at 600°C, but all samples consist of the main spinel phase in combination of a small amount of a foreign LaFeO3 phase after doping. When the precursor is calcined at 900°C, the lattice constants of the ferrites initially increase after La3+ doping, but then become smaller with additional La3+ doping. The addition of La3+ results in a reduction of crystallite size. Magnetic measurement reveals that the specific saturation magnetization (Ms) of the as-prepared ferrites decreases with increasing La3+ substitution, while the coercivity (Hc) of Ni0.5Zn0.5LaxFe2-xO4 obtained above 800°C increases with increasing La3+ substitution. © 2014 Published by Elsevier B.V.


Liu Y.,Guangxi Normal University | Liang Y.,Guangxi Normal University | Lian H.,Guangxi Normal University | Zhang C.,Guangxi Normal University | And 2 more authors.
International Journal of Electrochemical Science | Year: 2014

The electrolytic manganese dioxide - graphene (EMDG) composite was used in the construction of a sensor, which showed strong electrocatalytic activity to the oxidation of vanillin in neutral solutions. Vanillin produces an anodic peak at about 0.67 V at this electrode. Several electrochemical parameters of these processes were further carefully calculated with the results of the charge transfer coefficient a as 0.703 and the electron transferred number n as 2. The electrocatalytic behavior was further exploited as a sensitive detection scheme for the vanillin determination by differential-pulse voltammetry (DPV). Under optimized conditions, the anodic peak current increased linearly with the vanillin concentration over the range from 1.0×10-7 to 4.5×10-5 mol L-1. The detection limit was calculated as 3.2×10-8 mol L-1 (S/N=3). The proposed method was applied to the detection of biscuits and chocolates samples with satisfactory results. © 2015 The Authors.

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