Henan Normal University

Henan, China

</pre>Henan Normal University , colloqiually known as 河师大 Héshīdà), is a public normal university located in Xinxiang, Henan, China. Wikipedia.

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Guo J.,Henan Normal University | Zhou H.-X.,Florida State University
Chemical Reviews | Year: 2016

The functions of many proteins are regulated through allostery, whereby effector binding at a distal site changes the functional activity (e.g., substrate binding affinity or catalytic efficiency) at the active site. Most allosteric studies have focused on thermodynamic properties, in particular, substrate binding affinity. Changes in substrate binding affinity by allosteric effectors have generally been thought to be mediated by conformational transitions of the proteins or, alternatively, by changes in the broadness of the free energy basin of the protein conformational state without shifting the basin minimum position. When effector binding changes the free energy landscape of a protein in conformational space, the change affects not only thermodynamic properties but also dynamic properties, including the amplitudes of motions on different time scales and rates of conformational transitions. Here we assess the roles of conformational dynamics in allosteric regulation. Two cases are highlighted where NMR spectroscopy and molecular dynamics simulation have been used as complementary approaches to identify residues possibly involved in allosteric communication. Perspectives on contentious issues, for example, the relationship between picosecond-nanosecond local and microsecond-millisecond conformational exchange dynamics, are presented. © 2016 American Chemical Society.

Heng Z.,Henan Normal University
Advances in High Energy Physics | Year: 2012

In this paper we briefly review our recent studies on a 125 GeV Higgs and its diphoton signal rate in different low-energy supersymmetric models, namely, the minimal supersymmetric standard model (MSSM), the next-to-minimal supersymmetric standard model (NMSSM), the nearly minimal supersymmetric standard model (nMSSM), and the constrained MSSM. Our conclusion is as follows (i) in the allowed parameter space the SM-like Higgs boson can easily be 125 GeV in the MSSM, NMSSM, and nMSSM, while it is hard to realize in the constrained MSSM; (ii) the diphoton Higgs signal rate in the nMSSM and constrained MSSM is suppressed relative to the prediction of the SM, while the signal rate can be enhanced in the MSSM and NMSSM; (iii) the NMSSM may allow for a lighter top squark than the MSSM, which can thus ameliorate the fine-tuning problem. © 2012 Zhaoxia Heng.

Li R.,Henan Normal University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

Similar to the superradiant effect in Reissner-Nordström black holes, a charged scalar field can be amplified when impinging on the charged black hole in string theory. According to the black-hole bomb mechanism, the mass term of the incident field can work as the reflecting mirror, which may trigger the instability of the black hole. We study the possible instability triggered by superradiant effects and demonstrate that the charged black hole in string theory is stable against the massive charged scalar perturbation. The reason is that there is no trapping potential well in the black hole exterior, which is separated from the horizon by a potential barrier, and there are no bound states in the superradiant regime. © 2013 American Physical Society.

Li R.,Henan Normal University
International Journal of Modern Physics D | Year: 2012

We have studied perturbations of scalar and spinor field in the background of three-dimensional Gödel black hole. The wave equations are shown to be exactly solvable in terms of hypergeometric functions. The quasinormal modes are analytically calculated by imposing the Dirichlet boundary condition at spatial infinity, which are shown to be of the same form in both cases. By considering the physical interpretation of quasinormal modes, we obtain the consistent transition frequencies from the quasinormal modes of scalar and spinor field. As an application of quasinormal modes, we have also investigated the area and entropy quantization of three-dimensional Gödel black hole. By choosing the conserved mass of Gödel black hole properly, the entropy spectrum are shown to be equally-spaced. © 2012 World Scientific Publishing Company.

Zhang S.,CAS Institute of Process Engineering | Sun J.,CAS Institute of Process Engineering | Zhang X.,CAS Institute of Process Engineering | Xin J.,CAS Institute of Process Engineering | And 2 more authors.
Chemical Society Reviews | Year: 2014

To mitigate the growing pressure on resource depletion and environment degradation, the development of green processes for the production of renewable energy is highly required. As a class of novel and promising media, ionic liquids (ILs) have shown infusive potential applications in energy production. Aiming to offer a critical overview regarding the new challenges and opportunities of ILs for developing green processes of renewable energy, this article emphasises the role of ILs as catalysts, solvents, or electrolytes in three broadly interesting energy production processes from renewable resources, such as CO2 conversion to fuels and fuel additives, biomass pretreatment and conversion to biofuels, as well as solar energy and energy storage. It is expected that this article will stimulate a generation of new ideas and new technologies in IL-based renewable energy production. © the Partner Organisations 2014.

Li R.,Henan Normal University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2012

Three-dimensional Gödel black hole is a solution to Einstein-Maxwell-Chern-Simons theory with a negative cosmological constant. We have studied the hidden conformal symmetry for massive scalar field without any additional condition in the background of three-dimensional nonextremal and extremal Gödel black holes. This conformal symmetry is uncovered by the observation that the radial wave equations in both cases can all be rewritten in the form of SL(2,R) Casimir operators through introducing two sets of conformal coordinates to write the SL(2,R) generators. At last, we give the holographic dual descriptions of Bekenstein-Hawking entropies of nonextremal and extremal black holes from Cardy formula of conformal field theory. © 2012 American Physical Society.

Li R.,Henan Normal University | Zhao J.,Henan Normal University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

We numerically study the superradiant instability of charged massless scalar field in the background of charged stringy black hole with mirror-like boundary condition. We compare the numerical result with the previous analytical result and show the dependencies of this instability upon various values of black hole charge Q, scalar field charge q, and mirror radius rm. Especially, we have observed that imaginary part of BQN frequencies grows with the scalar field charge q rapidly. © 2014 The Authors.

Gao S.,Henan Normal University | Geng K.,Henan Normal University
Nano Energy | Year: 2014

Manganese oxide coated with a uniform layer of N-doped carbon (Mn3O4@CNx) is readily synthesized using a simple aqueous solution based chelating agent dicyandiamide mediated growth of MnCO3 followed by calcination at 1000°C. The Mn3O4@CNx can provide sufficient effective three-phase interface area due to the unique structures, which plays the important role in the complex three-phase interface electrocatalytic reaction in oxygen reduction reaction. The electron transfer, from the CNx layer to the Mn ions, is supposed to occur and the high positive charge be generated on the Mn3O4@CNx surface. As a result, these non-precious hybrid materials display an excellent activity for oxygen reduction reaction in terms of electrocatalytic activity, long-term stability, and excellent resistance to crossover effect. © 2014 Elsevier Ltd.

Li R.,Henan Normal University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2012

We study the superradiance instability of charged massive scalar field in the background of Kerr-Newman-anti-de Sitter black hole. By employing the asymptotic matching technique to solve Klein-Gordon equation analytically, the complex parts of quasinormal frequencies are shown to be positive in the regime of superradiance. Because the calculation is performed in the approximation of small black hole, the result indicates that small Kerr-Newman-anti-de Sitter black hole is unstable against the massive scalar field perturbation with small charge. © 2012 Elsevier B.V.

Liu N.,Henan Normal University
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2012

A precise calculation of the top quark pair production associated with a hard photon is essential for testing the electroweak property of the top quark in the Standard Model (SM). We investigate the one-loop QCD corrections to the process e +e -→tt̄γ at the International Linear Collider (ILC), and find that the K-factor can be as large as 1.238 (1.105, 1.060) for a center-of-mass energy √s=500(800,1500) GeV. The transverse momentum distributions of the top quark and photon are respectively shown at leading order (LO) and next-to-leading order (NLO). Due to the asymmetric rapidity distribution of the top (anti-top) quark, we also study the top quark forward-backward asymmetry (AFBt) in tt̄γ production at NLO, which is found to be 45.82 (55.25, 55.89)% for √s=500(800,1500) GeV. © 2011 Elsevier B.V.

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