摘要:

A first principle theoretical scheme which is based on pseudopotential perturbation theory, the thermodynamics of hard sphere systems and the variational method based on Gibbs-Bogoliaubov inequality is used to investigate the specific heat of liquid Rb in the undercooled region (T<Tm).Clpis found to increase with decreasingTand exhibits a maxima in the vicinity of 60 K. The anomalies inClpin the undercooled region are discussed in terms of structure and volume dependent contributions of energies and entropies.

ISSN:0031-9104    

DOI:10.1080/00319109808030595

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The excess gibbs energy of mixing in binary mixtures of TBP in nonpolar solvents viz. bcnzene, carbon disulphide, cyclohexane, n-heptane, n–hexane, p–xylene, tetrachloromethane at temperature 303°K is studied. The excess free energy of mixing (AGA8) is in the order, n–hexane < n–heptane < benzene < cyclohexane < p–xylene < CCI4 < CS2. The results corroborate the findings obtained through evaluation of the excess correlation Factor.

ISSN:0031-9104    

DOI:10.1080/00319109808030596

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The apparent molar volumes of DL–α–alanine, DL–β–alanine, DL–α–aminobutyric acid, DL–α–phenylalanine, DL–serine and DL–aspartic acid in very dilute aqueous solutions at 25,00°C were determined from density measurements. From these data it is shown that the concentration dependence of the apparent molar volume of these amino acids at very low molality differs from the behavior found at concentrations higher than 0,01m. This change has been attributed to solute-water interactions which prevail at very high dilution.

ISSN:0031-9104    

DOI:10.1080/00319109808030597

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Motivated by exact results for many closed shells in a bare Coulomb field, a generalization of the Thomas-Fermi statistical model is proposed. This generalization includes density gradients in the density-potential relation, and offers the possibility of avoiding the singularity (of the original method) in the density at an atomic nucleus and of embodying Kato's theorem.

ISSN:0031-9104    

DOI:10.1080/00319109808030598

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The dielectric constants of some aqueous-organic solvent mixtures have been analysed by an equation analogous to Grunberg and Nissan equation. The hydration numbers are found out at the maxima and minima of the plots of Δϵ versusx2. The extent of hydration of organic solvents is discussed in the light of structure of the solvents. It is shown that the equations can be very well applied to aqueous-organic solvent mixtures. An interaction parameterdis defined to fit the dielectric constant data of the mixtures which bears a linear relationship with ϵ2.

ISSN:0031-9104    

DOI:10.1080/00319109808030599

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

The anomalous variation of the magnetic susceptibility in liquid alloys of gold with polyvalent metals is discussed in terms of electron concentration and conventional pseudopotential theory. The characteristic minima of the susceptibility are shifted systematically towards the Au-rich side if the valency of the alloying element is increased, but considering the average electron concentration they all seem to occur at a critical electron to atom ratio ofe/a≈1.6. They are obviously a manifestation of the electronic stabilization which gives rise to the formation of electron compounds in the critical range of composition.

ISSN:0031-9104    

DOI:10.1080/00319109808030600

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Recent work by the writer, and by March, Holas and Nagy, has exposed the form of the differential equation for the ground-state electron density of a heavy atom or molecule in the Thomas-Fermi statistical limit, corrected by exchange and correlation. Here, a formally exact summation is proposed of the so-called local density approximation, appropriate to a weakly inhomogeneous, but fully interacting, electron liquid.

ISSN:0031-9104    

DOI:10.1080/00319109808030601

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0031-9104    

DOI:10.1080/00319109808030594

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor