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, research on this type of substances is very important. Therefore, the main objective of our work was to develop the extraction process and to optimize the conditions for the determination of selected ES-silanates and the separation of constituents of the mixture of these compounds in aqueous solutions. For this purpose, it was necessary to select adequate leading electrolytes and to develop a suitable terminating electrolyte. Materials and methods The compounds synthesized at the Institute of Chemistry of the University of Natural Sciences and Humanities in Siedlce

R a m a n S p e c tro sc o p ic S tu d y o f th e Io n A sso c ia tio n o f L ith iu m S u lfa te A queous S o lu tio n s Fernando Rull* Department of Fisica de la Materia Condensada, Cristalografia y Mineralogia, Facultad de Ciencias, 47006-Valladolid, Spain Z. Naturforsch. 50 a, 292-300 (1995); received November 29, 1994 Dedicated to Prof. Hitoshi Ohtaki on the occasion of his 60th birthday A Raman spectroscopic study of Li2S04 aqueous solutions as function of concentration and temperature was performed. The dynamic properties of the sulfate ions

Radiochim. Acta 95, 281–287 (2007) / DOI 10.1524/ract.2007.95.5.281 © by Oldenbourg Wissenschaftsverlag, München Mordanting of mercury on styrene-divinylbenzene copolymer beads from aqueous solutions By N. Khalid1∗, S. Ali2, A. Iqbal2 and S. Ahmad1 1 Nuclear Chemistry Division, Pakistan Institute of Nuclear Science and Technology, P.O. Nilore, Islamabad, Pakistan 2 Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan (Received February 22, 2006; accepted in revised form December 8, 2006) Sorption of mercury / Styrene-divinylbenzene copolymer

state for such activities in the present review is usually the ideal 1 M aqueous solution. Species in solution that can also exist as gases, such as O 2 , can be referred to the 1 M aqueous standard state or to the 100 kPa (1 bar, ~1 atm) pressure standard state, and in such cases we have taken care to designate the state explicitly. For water the standard state is the pure solvent (at unit activity, not 55.5 M). Standard electrode potentials are related to equilibrium constants ( K eq ) through the relationship (2) E °   =   – ( R T / n F ) ln K eq  (2) $$E

45Scandium NMR Investigations in Aqueous Solutions E. Haid, D. Köhnlein, G. Kössler, O. Lutz*, W. Messner, K. R. Mohn, G. Nothaft , B. van Rickelen, W. Schich, and N. Steinhauser Physikalisches Institut der Universität Tübingen Z. Naturforsch. 38a , 317-321 (1983); received December 3, 1982 45Sc N M R chemical shifts, linewidths, and longitudinal relaxation rates have been measured in aqueous solutions of scandium chloride and sulphate as a function of the appropr ia te acid. A common typical behaviour of these parameters without sudden changes has been

Photophysics of Ochratoxin A in Aqueous Solution Dörte Steinbrück, Claudia Rasch, and Michael U. Kumke Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24 – 25, 14476 Potsdam, Germany Reprint requests to Michael U. Kumke. E-mail: kumke@chem.uni-potsdam.de Z. Naturforsch. 2008, 63b, 1321 – 1326; received July 14, 2008 The photophysics of Ochratoxin A (OTA) in aqueous solution strongly depends on the pH. Due to its molecular structure OTA is prone to an excited state proton transfer reaction, which rules the photophysical properties. Based on

A Molecular Dynamics Study of Aqueous Solutions III. A Comparison of Selected Alkali Halides K. Heinzinger and P. C. Vogel * Max-Planck-Institut für Chemie (Otto-Hahn-Institut), Mainz, Germany (Z. Naturforsch. 3 1 a , 4 6 3 - 4 7 5 [1976]; received January 30, 1976) Results of a molecular dynamics study of aqueous solutions of LiJ, LiCl, NaCl, CsCl and CsF are reported. The basic periodic box contained 200 water molecules, 8 cations and 8 anions, equiv- alent to 2.2 molal solutions. Static properties of the first hydration shells of the ions are discussed

1741 Pure Appl. Chem., Vol. 78, No. 9, pp. 1741–1747, 2006. doi:10.1351/pac200678091741 © 2006 IUPAC Designing ordered nanoarrays from aqueous solutions* Lionel Vayssieres ICYS, National Institute for Materials Science, Tsukuba, 305-0044, Japan Abstract: The design and large-scale fabrication of ordered arrays consisting of advanced and well-defined building blocks such as quantum dots, nanorods, and nanowires is essential to the creation of new devices based on nanoscience. A concept as well as a growth model and a thin film technique have been developed by the

The importance of solid-solution–aqueous-solution (SSAS) equilibria requires the incorporation of solid solutions into thermodynamic models for industrially and environmentally relevant applications. Insights from appropriate measurements and recent database developments have made such extensions feasible. Examples illustrating various types of stable and metastable equilibria involving solid solutions will be given.

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