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Showing papers by "Henan Normal University published in 2000"


Journal ArticleDOI
TL;DR: In this paper, the formation of cyanide bridges is evident from the IR and UV-Vis spectra by appearance of ν(CN) shifts and changes in λmax with respect to the mononuclear parent complex [Ni(L)m]2+ with [Ni (CN)4]2− in aqueous solution.

63 citations


Journal ArticleDOI
TL;DR: Volumetric parameters indicating the interactions of NaCl with saccharide molecules in water have been obtained by using transfer volumes of the saccharides and NaCl, and the resulting values are in good agreement with each other within experimental error.

54 citations


Journal ArticleDOI
Xiaopeng Xuan1, Jianji Wang1, Junming Tang1, Guirong Qu1, Jinsuo Lu1 
TL;DR: It has been concluded that Li+ cations are preferentially solvated by DMF molecules in the LiClO4/PC-DMF solutions.

48 citations


Journal ArticleDOI
J. Z. Bai1, Yong Ban2, Yong Ban1, J. G. Bian1  +177 moreInstitutions (9)
TL;DR: In this article, BES data on J / ψ → γ ( π + π − π+ π− π plus π-plus − ) have been analyzed into partial waves.

39 citations


Journal ArticleDOI
TL;DR: In this paper, the authors restudy this constraint by further taking account of the extended technicolor gauge boson correction which is positive and show that the top-pion mass is allowed to be in the region of a few hundred GeV depending on the models.
Abstract: Recent study on the charged top-pion correction to ${R}_{b}$ shows that it is negative and large, so that the precision experimental value of ${R}_{b}$ gives rise to a severe constraint on the top-color-assisted technicolor models such that the top-pion mass should be of the order of 1 TeV. In this paper, we restudy this constraint by further taking account the extended technicolor gauge boson correction which is positive. With this positive contribution to ${R}_{b},$ the constraint on the top-color-assisted technicolor models from ${R}_{b}$ changes significantly. The top-pion mass is allowed to be in the region of a few hundred GeV depending on the models.

38 citations


Journal ArticleDOI
TL;DR: In this article, the chiral Lagrangian for low lying pseudoscalar mesons is derived from the first principles of QCD considering the contributions from the normal part of the theory without taking an approximation.
Abstract: We formally derive the chiral Lagrangian for low lying pseudoscalar mesons from the first principles of QCD considering the contributions from the normal part of the theory without taking an approximation. The derivation is based on the standard generating functional of QCD in the path integral formalism. The gluon-field integration is formally carried out by expressing the result in terms of the physical Green's functions of the gluon. To integrate over the quark field, we introduce a bilocal auxiliary field $\ensuremath{\Phi}(x,y)$ representing the mesons. We then develop a consistent way of extracting the local pseudoscalar degree of freedom $U(x)$ in $\ensuremath{\Phi}(x,y)$ and integrating out the rest degrees of freedom such that the complete pseudoscalar degree of freedom resides in $U(x).$ With certain techniques, we work out the explicit $U(x)$ dependence of the effective action up to the ${p}^{4}$ terms in the momentum expansion, which leads to the desired chiral Lagrangian in which all the coefficients contributed from the normal part of the theory are expressed in terms of certain quark Green's functions in QCD. Together with the exsisting QCD formulas for the anomaly contributions, the present results lead to the complete effective chiral Lagrangian for pseudoscalar mesons. The final result can be regarded as the fundamental QCD definition of the coefficients in the chiral Lagrangian. The relation between the present QCD definition of the ${p}^{2}$-order coefficient ${F}_{0}^{2}$ and the well-known appoximate result given by Pagels and Stokar is discussed.

35 citations


Journal ArticleDOI
TL;DR: The results suggested that the interactions of these monosaccharides with NaCl are controlled mostly by the dominant conformer of their molecules in water.

34 citations


Journal ArticleDOI
TL;DR: In this article, the excess molar volume ( ) and deviation in viscosity (Δη) were calculated for propylene carbonate + N,N-dimethylformamide mixtures at 298.15, 308.15 and 338.15 K. These results were fitted to the Redlich−Kister polynomials.
Abstract: Densities and viscosities have been determined as a function of mole fraction for propylene carbonate + N,N-dimethylformamide mixtures at 298.15, 308.15, 318.15, 328.15, and 338.15 K. From these measurements, the excess molar volume ( ) and deviation in viscosity (Δη) were calculated. These results were fitted to the Redlich−Kister polynomials. The values of are found to be positive, whereas those of Δη are negative over the entire composition range at each temperature investigated. The values of decrease but those of Δη increase with increasing temperature. Results have been explained on the basis of molecular interactions in the mixtures.

32 citations


Journal ArticleDOI
Chongxing Yue1, Gongru Lu1, Junjie Cao, Jiantao Li, Guoli Liu 
TL;DR: In this article, the authors calculate the contributions of TC2 theory to top-charm production via the processes γγ→ t c and e + e − →γγγ → t c at the high energy linear e+ e − collider (LC) experiments.

27 citations


Journal ArticleDOI
TL;DR: In this paper, the viscosity B -coefficients for the amino acids in the aqueous urea solution have been calculated at different temperatures, and the effect of temperature on the B-coefficients is discussed on the basis of the Feakins equation.

25 citations


Journal ArticleDOI
Xiuying Zhang1, Youjuan Zhang1, Lin Yang1, Ruina Yang, Douman Jin 
TL;DR: In this article, six new complexes of the light Ianthanide elements La, Ce, Pr, Nd, Sm and Eu with Schiff base ligands derived from salicylaldehyde and glycine have been synthesized and characterized by elemental analyses, molar electrical conductivities, magnetic moments, infrared and electronic spectra, and thermogravimetric analyses.
Abstract: Six new complexes of the light Ianthanide elements La, Ce, Pr, Nd, Sm and Eu with Schiff base ligands derived from salicylaldehyde and glycine have been synthesized and characterized by elemental analyses, molar electrical conductivities, magnetic moments, infrared and electronic spectra, and thermogravimetric analyses. All of the complexes were found to be non-electrolytes of the general empirical formula Ln(L)(HL)nH2O, where H2L is the glycine Schiff base ligand and n is 3 or 3. 5.

Journal ArticleDOI
01 Jan 2000-Analyst
TL;DR: The method is simple and rapid and it was successfully applied to the determination of thiocyanate in urine and saliva of smokers and non-smokers and in venous blood of patients infused with sodium nitroprusside.
Abstract: A new method for the indirect determination of thiocyanate with ammonium sulfate and ethanol by extraction–flotation of copper in the presence of ascorbic acid is described. A small amount of Cu(II) is reduced to Cu(I) by ascorbic acid, then Cu(I) is precipitated with SCN−. In the course of phase separation of ethanol from water, the precipitated CuSCN stays in the interface of ethanol and water. A good linear relationship is observed between the flotation yield of Cu(II) and the amount of SCN−. Using 1.0 ml of 1 × 10−3 M ascorbic acid solution, 50 μg of Cu(II), 3.5 g of (NH4)2SO4 and 3.0 ml of ethanol with a total volume of 10 ml, the concentration of thiocyanate could then be determined by determining the flotation yield of Cu(II). The detection limit for thiocyanate is 5 × 10−5 M. Every parameter was optimized and the reaction mechanism was studied. The method is simple and rapid and it was successfully applied to the determination of thiocyanate in urine and saliva of smokers and non-smokers and in venous blood of patients infused with sodium nitroprusside.

Journal ArticleDOI
Jun-Ping Xiao1, Yu-Lu Wang1, Xueshun Jia1, Xiaoyang Wang1, Hong Wang1 
TL;DR: In this paper, the bisaryl carbodiazone compounds from the aryl substituted carbazides with Ceric Ammonium Nitrate (CAN) were reported for the first time in excellent yields.

Journal ArticleDOI
TL;DR: In this paper, the authors calculate the enhancements to the inclusive charmless decays of b quark, b→sg,sq q,sgg, from gluon penguin diagrams induced by the charged and neutral Higgs bosons (H±,h0,H0, and A0) in the Two-Higgs-Doublet Model with flavor-changing couplings.

Journal ArticleDOI
28 Jun 2000-Langmuir
TL;DR: In this article, the densities of aqueous solutions containing n-octylamine, 0.0500 mol kg-1 cetyltrimethylammonium bromide (CTAB), and sodium chloride/potassium chloride have been determined and used to derive the sta...
Abstract: Densities of aqueous solutions containing n-octylamine, 0.0500 mol kg-1 cetyltrimethylammonium bromide (CTAB), and sodium chloride/potassium chloride have been determined and used to derive the sta...

Journal ArticleDOI
TL;DR: In this paper, the authors consider the bound on the mass of the new gauge boson Z from the experimental value of the branching ratio Br( μ → 3 e ) in the framework of topcolor assisted technicolor models.

Journal ArticleDOI
TL;DR: In this article, partial differential cross sections for photoionization of helium ion in the R-matrix method with a 20-term target representation for incident photon energies between the $N = 2$ and $N=5$ thresholds (69--76.8 eV) were provided.
Abstract: Photoionization excitation of helium has been performed employing the R-matrix method with a 20-term target representation for incident photon energies between the $N=2$ and $N=5$ thresholds (69--76.8 eV) of the ${\mathrm{He}}^{+}$ ion. Partial differential cross sections for photoionization leaving the ${\mathrm{He}}^{+}$ ion in the $N=2,3,4$ levels at emission angles $0\ifmmode^\circ\else\textdegree\fi{}$ and in the $N=2$ level $90\ifmmode^\circ\else\textdegree\fi{}$ are provided. Our results to ${\mathrm{He}}^{+}$ in the $N=2$ state give fairly good agreement with the available experimental data and theoretical calculations below the $N=3$ threshold. Between the $N=3$ and $N=5$ thresholds of the ${\mathrm{He}}^{+}$ ion, our results for ${\mathrm{He}}^{+}$ in the $N=2,3,4$ states still agree with experiment qualitatively.

Journal ArticleDOI
TL;DR: Dimethylammonium chlorochromate adsorbed on silica gel (DMCC/SiO2) makes the regeneration of carbonyl compounds from oximes, semicarbazones, 4-phenyl-semicarazones and p-nitrophenylhydrazones in good yields under mild and nonaqueous conditions as mentioned in this paper.

Journal ArticleDOI
TL;DR: In this article, the methylammonium chlorochromate adsorbed on silica gel (MCC/SiO2) under mild and non-aqueous conditions was used to convert oximes, p-nitrophenylhydrazones, 4-phenylsemicarbazones and semicarbazone to their corresponding carbonyl compounds in good yields.

Journal ArticleDOI
TL;DR: In this paper, the authors study a diffusive limit of a semilinear hyperbolic system with relaxation and rigorously justify this limit using the energy method under a rather weak characteristic condition, called diffusive subcharacteristic condition.
Abstract: In this paper, we study a diffusive limit of a semilinear hyperbolic system with relaxation. For a Cauchy problem with initial data prescribed around a weak traveling wave solution, we rigorously justify this limit using the energy method under a rather weak characteristic condition, called the diffusive subcharacteristic condition.

Journal ArticleDOI
TL;DR: The trinuclear CuI complex [Cu3(dppm)3(NO3)(OH)](NO 3) obtained by reacting dppm with 3H2O in the presence of NaBPh4 was characterized by a single-crystal X-ray analysis as well as by physico-chemical and spectroscopic methods as mentioned in this paper.
Abstract: The novel trinuclear CuI complex [Cu3(dppm)3(NO3)(OH)](NO3) obtained by reacting dppm with Cu(NO3)2 · 3H2O in the presence of NaBPh4 was characterized by a single-crystal X-ray analysis as well as by physico-chemical and spectroscopic methods. The [Cu3(dppm)3(NO3)(OH)]+ cation consists of a triangular array of copper atoms, (with dppm ligands bridging each edge of the triangle), a triply bridging OH group and NO−3 anion bound to two faces of the Cu3 unit, respectively.

Journal ArticleDOI
TL;DR: In this paper, the effective chiral Lagrangian for a matter field content consisting of pseudo-scalar Goldstone bosons and vector bosons with hidden symmetry is derived from the underlying QCD theory.
Abstract: The effective chiral Lagrangian for a matter field content consisting of pseudo-scalar Goldstone bosons and vector bosons (with hidden symmetry) is derived from the underlying QCD theory. No approximations are made. All the free parameters of the effective chiral Lagrangian are expressed in terms of QCD-based Green's functions. These may be regarded as the QCD definitions of these Lagrangian coefficients.

Journal ArticleDOI
TL;DR: In this paper, the top quark pair production process at the Fermilab Tevatron run II and the CERN LHC has been studied and the s-channel neutral pseudo Goldstone bosons (PGBs) contribute dominantly to the production amplitudes from their coupling to the gluons through the triangle loops of techniquarks.
Abstract: We study the top quark pair production process $pp(\overline{p})\ensuremath{\rightarrow}t\overline{t}$ in various kinds of technicolor (TC) models at the Fermilab Tevatron run II and the CERN LHC. The s-channel neutral pseudo Goldstone bosons (PGBs) contribute dominantly to the production amplitudes from their coupling to the gluons through the triangle loops of techniquarks and the top quark. Cross sections in different TC models with s-channel PGB contributions are calculated. It is shown that the PGB effects can be experimentally tested and different TC models under consideration can be distinguished at the LHC. Therefore, the $p\stackrel{\ensuremath{\rightarrow}}{p}t\overline{t}$ process at the LHC provides feasible tests of technicolor models.

Journal ArticleDOI
Hong Wang1, Yu-Lu Wang1, Geng Zhang1, Jian-Ping Li1, Xiaoyang Wang1 
TL;DR: In this article, the preparation of diaryl carbazones on solid phase was reported for the first time using Fe(NO3)3.9H2O as oxidant.

Journal ArticleDOI
TL;DR: In this paper, the effective chiral Lagrangian derived from underlying QCD for pseudo-scalar Goldstone bosons has been generalized to involve the whole nonet pseudo-Goldstone Bosons, no approximation is made in the derivation.
Abstract: The effective chiral Lagrangian derived from underlying QCD for pseudo-scalar Goldstone bosons has been generalized to involve the whole nonet pseudo-Goldstone bosons, no approximation is made in the derivation. The formulation offers general QCD definitions for the coefficients in effective chiral Lagrangian.

Journal ArticleDOI
TL;DR: In this paper, the authors calculate the contributions of topcolor-assisted technicolor models to rare decays and from one-loop -penguin diagrams in the framework of top-color assisted technicolors, and find that the contribution from technipions is less than 2% of the standard model prediction.
Abstract: We calculate the contributions to the rare decays and from one-loop -penguin diagrams in the framework of topcolor-assisted technicolor model. Within the parameter space, we find that: (a) the new contribution from technipions is less than 2% of the standard model prediction; (b) the top-pions can provide a factor of 10 to 30 enhancement to the ratios in question; (c) the topcolor-assisted technicolor model is consistent with the current experimental data.

Journal Article
TL;DR: This paper concentrates on the complexity of the decision problem deciding whether a literal belongs to at least one extension of a default theory 〈D,W〉 in which D is a set of Horn defaults and W is a definite Horn formula or a BidHorn formula.
Abstract: This paper concentrates on the complexity of the decision problem deciding whether a literal belongs to at least one extension of a default theory 〈D,W〉 in which D is a set of Horn defaults and W is a definite Horn formula or a BidHorn formula

Journal ArticleDOI
TL;DR: It is shown that if the initial perturbations possess some algebraic decay in space, then the nu- merical solutions converge to the discrete travelling wave at a corresponding algebraic rate in time, provided the sums of the initialperturbations for the u-component equal zero.
Abstract: This paper is concerned with the asymptotic convergence of nu- merical solutions toward discrete travelling waves for a class of relaxation nu- merical schemes, approximating the scalar conservation law. It is shown that if the initial perturbations possess some algebraic decay in space, then the nu- merical solutions converge to the discrete travelling wave at a corresponding algebraic rate in time, provided the sums of the initial perturbations for the u-component equal zero. A polynomially weighted l 2 norm on the perturba- tion of the discrete travelling wave and a technical energy method are applied to obtain the asymptotic convergence rate.

Journal ArticleDOI
Zi-xin Liu1, Xing-yi Li1, Xing-li Chu1, Yong-chang Huang, Ya Liu 
TL;DR: In this article, the binding energy of the single and double bound polaron bound to a helium-type donor impurity in quantum wells (QWs) subject to a perpendicular electric field is calculated by a variational method.

Journal ArticleDOI
TL;DR: In this article, a phase separation method was used for the extraction of cadmium(II) as Cd-II complex into n-propanol phase at pH 2.0-6.0, with 2.5 × 10−4M of Rhodamine B (RB+), 2.6 g/10 mL of ammonium sulfate as the salting-out reagent, n-Propanol as the solvent, and 0.065 M of KI.
Abstract: n-Propanol can be salted out from aqueous solution by adding inorganic salts. This phase separation method has been used for the extraction of cadmium(II) as Cd(II) complex into n-propanol phase at pH 2.0-6.0, with 2.5 × 10−4M of Rhodamine B (RB+), 2.6 g/10 mL of ammonium sulfate as the salting-out reagent, n-propanol as the solvent, in the presence of 0.065 M of KI. Cd(II) was determined spectrophotometrically by measuring the absorbance at 495 nm. Various parameters influencing the phase separation and the extraction of Cd(II) have been investigated. The method is quite simple and useful; it affords binary separation of Cd(II) from Fe(III), Co(II), Ni(II), Zn(II), Mn(II)and Al(III) and is applicable to the separation of Cd(II) from synthetic samples. The extraction mechanism has been tentatively studied.