检索结果-南通市图书馆

Chinese Chemical Letters 2009年第6期20卷 751-754页

作者： g.rezaei Behbehani Chemistry Department Imam Khomeini International University

The interaction of CuCl2 to the first 16 residues of the Alzheimer＇s amyliod β peptide, Aβ（1-16） was studied by isothermal titration calorimetry at pH 7.2 and 37℃ in aqueous solution.

关键词： Alzheimer's amyloid β peptide Isothermal titration calorimetry Solvation parameters

Linear and Nonlinear Optical Properties of Spherical Quantum Dots:Effects of Hydrogenic Impurity and Conduction Band Non-Parabolicity

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2012年第3期57卷 485-489页

作者： g.rezaei B.Vaseghi N.A.Doostimotlagh Department of Physics College of SciencesYasouj University Young Researchers Club Yasooj BranchIslamic Azad University

Simultaneous effects of an on-center hydrogenic impurity and band edge non-parabolicity on intersubband optical absorption coefficients and refractive index changes of a typical gaAs/Alxga1-xAs spherical quantum dot are theoretically investigated, using the Luttinger-Kohn effective mass equation. So, electronic structure and optical properties of the system are studied by means of the matrix diagonalization technique and compact density matrix approach, respectively. Finally, effects of an impurity, band edge non-parabolicity, incident light intensity and the dot size on the linear, the third-order nonlinear and the total optical absorption coemcients and refractive index changes are investigated. Our results indicate that, the magnitudes of these optical quantities increase and their peaks shift to higher energies as the influences of the impurity and the band edge non-parabolicity are considered. Moreover, incident light intensity and the dot size have considerable effects on the optical absorption coefficients and refractive index changes.

关键词： hydrogenic impurity non-parabolic conduction band quantum dots absorption coefficient refractive index

Simultaneous Effects of Hydrostatic Pressure and Conduction Band Non-parabolicity on Binding Energies and Diamagnetic Susceptibility of a Hydrogenic Impurity in Spherical Quantum Dots

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2011年第8期56卷 377-381页

作者： g.rezaei N.A.Doostimotlagh B.Vaseghi Department of Physics College of SciencesYasouj University Young Research Club Islamic Azad University

Simultaneous effects of conduction band non-parabolicity and hydrostatic pressure on the binding energies of 1S, 2S, and 2P states along with diamagnetic susceptibility of an on-center hydrogenic impurity confined in typical gaAs/Alx- ga1-x As spherical quantum dots are theoretically investigated using the matrix diagonalization method. In this regard, the effect of band non-parabolieity has been performed using the Luttinger-Kohn effective mass equation. The binding energies and the diamagnetic susceptibility of the hydrogenic impurity are computed as a function of the dot radius and different values of the pressure in the presence of conduction band non-parabolicity effect. The results we arrived at are as follows： the incorporation of the band edge non-parabolicity increases the binding energies and decreases the absolute value of the diamagnetic susceptibility for a given pressure and radius; the binding energies increase and the magnitude of the diamagnetic susceptibility reduces with increasing pressure.

关键词： non-parabolic conduction band hydrostatic pressure quantum dots hydrogenic impurity diamagnetic susceptibility

Application of a simple calorimetric data analysis on the binding study of cyanide ions by Jack bean urease

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第4期21卷 457-460页

作者： g.rezaei Behbehani A.A.Saboury M.Mohebbian S.ghammamy Chemistry Department Imam Khomeini International UniversityQazvinIran Institute of Biochemistry and Biophysics University of TehranTehranIran Chemistry Department Payame Noor University(PNU)AbharIran

Cyanide ion was studied as an effector of Jack bean urease(JBU) at 300 K in 30 mmol/LTris buffer,pH 7 by isothermal titration calorimetry(ITC).The simple novel model was used for CN^- + JBU interaction over the whole range of CN^- *** binding parameters recovered from the simple novel model were attributed to the cyanide ion *** was found that cyanide ion acted as a noncooperative inhibitor of JBU,and there is a set of 12 identical and independent binding sites for CN^- *** di...

关键词： Isothermal titration calorimetry Cyanide ion Jack bean urease Binding parameter

A thermodynamic investigation on the binding of mercury ion with myelin basic protein at different temperatures

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第5期22卷 623-625页

作者： g.rezaei Behbehani L.Barzegar A.A.Saboury S.ghammami Chemistry Department Faculty of ScienceIslamic Azad UniversityTakestan BranchTakestanIran Institute of Biochemistry and Biophysics University of TehranTehranIran Department of Chemistry Imam Khomeini International UniversityQazvinIran

A thermodynamic study on the interaction of myelin basic protein with mercury ion was studied by using isothermal titration calonmetry,ITC,at 300.15,310.15 and 320.15 K in Tris buffer solution at pH *** enthalpies of MBP ＋ Hg^（2＋） interaction are reported and analysed in terms of the extended solvation *** was found that MBP has two identical and non-cooperative binding sites for Hg^（2＋） *** intrinsic dissociation equilibrium constants are 99.904,112.968 and 126.724μmol/L,and the molar enthalpy of binding are -11.634,-10.768 and -10.117kJ mol^（-1） at 300.15,310.15 and 320.15 K,respectively.

关键词： Myelin basic protein Mercury ion Isothermal titration calorimtry Binding parameters

Thermodynamic study of CN^- ion inhibition of Jack bean urease using the extended solvation theory

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第11期20卷 1389-1392页

作者： g.rezaei Behbehani A.A.Saboury M.Mohebbian S.Tahmasbi Sarvestani M.Poorheravi Chemistry Department Imam Khomeini International UniversityQazvinIran Institute of Biochemistry and Biophysics University of TehranTehranIran Chemistry Department Payame Noor University(PNU)AbharIran

Cyanide ion was studied as an inhibitor of Jack bean urease at 300 K in 30 mmol/L tris buffer, pH 7. The inhibition was investigated by isothermal titration calorimetry （ITC）. The extended solvation model was used for CN^- ＋ JBU interaction over the whole range of CN^- concentrations. The binding parameters recovered from the solvation model were attributed to the cyanide ion interaction. It was found that cyanide ion acted as a non-cooperative inhibitor ofurease, and there is a set of 12 ± 0.12 identical and independent binding sites for CN- ions. The dissociation equilibrium constant is 749.99 umol/L. The molar enthalpy of binding is AH= -13.60 kJ mol^-1.

关键词： Jack bean urease Cyanide ion Isothermal titration calorimetry Binding parameters Inhibitor

Energy level splitting of a 2D hydrogen atom with Rashba coupling in non-commutative space

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第12期72卷 116-122页

作者： S Aghababaei g.rezaei Department of Physics College of SciencesYasouj UniversityYasouj75918-74934Iran

We explore the non-commutative(NC)effects on the energy spectrum of a two-dimensional hydrogen *** consider a confined particle in a central potential and study the modified energy states of the hydrogen atom in both coordinates and momenta of non-commutativity *** considering the Rashba interaction,we observe that the degeneracy of states can also be removed due to the spin of the particle in the presence of NC *** obtain the upper bounds for both coordinates and momenta versions of NC parameters by the splitting of the energy levels in the hydrogen atom with Rashba ***,we find a connection between the NC parameters and Lorentz violation parameters with the Rashba interaction.

关键词： quantum mechanics non-commutative space spin–orbit interaction

A novel method for thermodynamic study on binding of copper ion with Alzheimer’s amyliod β peptide

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2009年第6期54卷 1037-1042页

作者： BEHBEHANI g. rezaei Chemistry Department Imam Khomeini International University

The interaction of Cu2+ with the first 16 residues of the Alzheimer's amyliod β peptide, Aβ (1-16), was studied by employing isothermal titration calorimetry at pH 7.2 and 37℃ in aqueous solution. The gholamreza rezaei Behbehani (gRB) solvation model was used to reproduce the enthalpies of Cu2++ Aβ(1-16) interaction over the whole Cu2+ concentrations. The binding parameters recovered from the solvation model were attributed to the structural change of Aβ (1-16) due to the metal ion interaction. It was found that there is a set of two identical and non interacting binding sites for Cu2+ ions. The molar enthalpy of binding is ΔH=27.895 kJ/mol. The association binding constants are 1.895 μM-1 and 1.891 μM-1 for the first and second binding sites respectively.

关键词：阿尔茨海默氏症铜离子热力学等温滴定量热法相互作用肽结合位点摩尔焓

Analysis of the Longitudinal Structure Function F_L from the Non-linear Regge gluon Density Behavior at Low-x

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2015年第11期32卷 18-21页

作者： BOROUN g.R. rezaei B. Physics Department Razi University

The longitudinal structure function with shadowing correction according to the nonlinear effects of the gluon density behavior at low x is considered. The solution of the gLR-MQ evolution equation for the gluon density shows that the FL^g（x, Q2） behavior can be tamed by the singularity at low x values. Comparing our results with H1 data at R=4 geV-1 shows that at very low x this behavior is completely tamed by taking shadowing correction into account.

关键词： Analysis of the Longitudinal Structure Function F_L from the Non-linear Regge gluon Density Behavior at Low-x

Longitudinal Structure Function FL from Charm Structure Function F2^c

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2013年第4期59卷 462-466页

作者： B. rezaei g.R. Boroun Physics Department Razi University

We predict the effect of the charm structure function on the longitudinal structure function at small x. In NLO analysis we find that the hard Pomeron behavior gives a good description of FL and Fk^c （k = 2, L） at small x values. We conclude that a direct relation between FL∝ F2^c would provide useful information on how to measure longitudinal structure function at high 0,2 values. Having checked that this model gives a good description of the data, when compared with other models.

关键词： charm structure function gluon distribution quantum chromodynamics small-x