Statement About Cooperatively Spreading “Chem. Res. Chinese Universities” by Both Editorial Department of Chem. J. Chinese Universities and Elsevier Company

Recently, Elsevier Company and the Editorial Department of Chem. J. Chinese Universities have together concluded and signed a cooperation agreement which states that the content of "Chem. Res. Chinese Universities" will be published in the whole context w…     

Comments on the Note on “Thermodynamic temperature differences from the ITS-90 for the correction of thermodynamic property data” by F. Pavese,P. Ciarlini,and P.P.M. Steur by J. Fischer,Chairman of WG4 of CCT

These are comments to a note from J. Fischer in publication.     

Comment on “Analytical evaluation for two-center nuclear attraction integrals over Slater type orbitals by using Fourier transform method” by S. ?zcan and E. ?ztekin (J. Math. Chem. DOI 10.1007/s10910-008-9398-z)

S. ?zcan and E. ?ztekin, (J. Math. Chem. doi:) published formulas for evaluating the two-center nuclear attraction integrals over Slater type orbitals. It is shown that the analytical relations for these integrals through the expansion coefficients of the electron charge density for the one-center case and the overlap integrals presented in Sect. 3 of this work can easily be derived by means of a simple algebra from the formulas published in our papers (I.I. Guseinov, J Mol Struct (Theochem) 417:117, 1997; J Math Chem 42:415, 2007 and B.A. Mamedov, Chin J Chem 22:545, 2004). It should be noted that the formulas of overlap integrals presented by E. ?ztekin et al., in previous paper (E. ?ztekin, M. Yavuz, Ş. Atalay, J Mol Struct (Theochem) 544:69, 2001) for the calculation of two-center nuclear attraction integrals also are obtained from our papers (see Comment: I.I. Guseinov, J Mol Struct (Theochem) 638:235, 2003).     

Reply to the Letter-to-the-editor written by J. J. Bevelacqua and S. M. J. Mortazavi on: “Radon survey in the kindergartens of three Visegrad countries (Hungary,Poland and Slovakia)” (DOI 10.1007/s10967-018-6374-3)

Journal of Radioanalytical and Nuclear Chemistry - An IAEA coordinated research project that began in 2012 and ended in 2016 was primarily dedicated to the compilation, evaluation and...     

Review of: “Physico-Chemical Properties of Selected Anionic Cationic and Nonionic Surfactants”. N.M van Os,J.R. Haak and L.M. Rupert (Eds.). Elsevier,Amsterdam, 1993, pp. viii + 608 pages. $245.75.(ISBN 0-444-89691-0)

The phase behavior in water of pentaglycerol monostearate (C₁₈G₅) and pentaglycerol monooleate (C_18:1G₅) surfactants has been studied as a function of temperature and surfactant weight fraction, W _s . The equilibrium phases present at each composition and temperature studied were characterized by means of visual observation under normal and polarized light, differential scanning calorimetry (DSC), and X‐ray scattering, both at small (SAXS) and at wide angle (WAXS). In the temperature range 0–46°C, C₁₈G₅ presents a thermotropic α‐gel structure. However, at higher temperatures, the α‐gel phase melts and a lamellar liquid crystalline (L_α) phase is formed. The amount of water that can be solubilized by α‐gel and L_α was determined by plotting the interlayer distance, d, as a function of the reciprocal of W _s . Water is soluble in the α‐gel phase up to 21 w/w% water concentration and in the L_α phase up to 30 w/w% water concentration. At higher water concentrations, excess water appears and a dispersion of α‐gel (α‐gel+W) and lamellar liquid crystal (L_α+W) in water is formed, respectively. In contrast, C_18:1G₅ is liquid in the whole range of temperatures studied (0–100°C). While at low temperatures, C_18:1G₅ presents a L_α structure, at about 63°C L_α melts and an isotropic liquid reverse micellar solution (O_m) phase is formed. The amount of water that can be solubilized by both O_m and L_α increases with temperature.     

A review of: “Potential Industrial Carcinogens and Mutagens,Studies in Environmental Science 4 by Lawrence Fishbein,Little Rock,Arkansas, 534 pages,many figures and tables,linen, format 250 × 175 mm,printed by Elsevier Scientific Publishing Company,Amsterdam, The Netherlands 1979, 73.25 US$ or 150.-Df1.”

Abstract

The design and calibration of a passive sampler operating according to the diffusion principle and its application to the analysis of indoor air are described. Taking aliphatic and aromatic hydrocarbons as representative pollutants, it is demonstrated that at constant concentration, the amount of substance trapped by the sampler is a linear function of the time of exposure. An equation is given relating this amount of substance to the mean pollutant concentration. The detection limit is of an order of 300μg/(m³.h). For test gas atmospheres variation coefficients of between 5 and 10%, were determined for a 24-hour exposure in an atmosphere with concentrations of the individual hydrocarbons between 150 and 600 μg/m³.