A study of the binding of manganese (II) with the sodium salts of nucleosides in aqueous solutions by the13C NMR method

1979 ◽  
Vol 15 (4) ◽  
pp. 491-494
Author(s):  
É. L. Kupche ◽  
I. P. Sekatsis
Keyword(s):  
Aqueous Solutions ◽  
Sodium Salts ◽  
Nmr Method

scholarly journals COMPLEXATION OF POLYETHYLENE-GLYCOL WITH THE SODIUM SALTS OF CITRIC AND SUCCINIC ACIDS IN THE AQUEOUS SOLUTIONS. STUDIES BY DYNAMIC LIGHT SCATTERING AND UV/VIS SPECTROPHOTOMETRY

2015 ◽  
Vol 11 (8) ◽  
pp. 3866-3872
Author(s):  
E.A. Masimov ◽  
Etibar Hummat Ismailov ◽  
S.Y. Odzhaqverdiyeva
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Aqueous Solutions ◽  
Polyethylene Glycols ◽  
Hydrodynamic Diameter ◽  
Absorption Bands ◽  
Sodium Salts ◽  
And Diffusion ◽  
Formation Of Complexes

Dynamic light scattering (DLS) method in combination with the UV/VIS spectrophotometry is used to study the interaction of polyethylene- glycols with a molecular weight  6000 ( PEG6000 ) with sodium salts of citric and succinic acids in aqueous solutions. The values of density, viscosity, refractive and diffusion indexes, the values of the hydrodynamic diameter, wavelength electronic absorption bands for PEG6000 aqueous solutions, their mixtures with succinic and citric acids are determined. It was shown that depending on the composition of the solutions the values of hydrodynamic diameter for aqueous solutions containing 1-5 wt.% PEG6000 and their mixtures with succinic and citric acids (~ 1 wt%) ranges from 3.6 to 5.2 nm. It is assumed that the formation of complexes with the sizes  that are within the above range is due to the features of interaction  and the structure of the complexes formed in solution.

scholarly journals Search for a Primary Isotopic Effect on the Magnetic Shielding of the Rubidium and Cadmium Isotopes

1973 ◽  
Vol 28 (3-4) ◽  
pp. 484-486
Author(s):  
H. Krüger ◽  
O. Lutz ◽  
A. Nolle ◽  
A. Schwenk ◽  
G. Stricker
Keyword(s):  
Aqueous Solutions ◽  
Optical Pumping ◽  
High Accuracy ◽  
Isotopic Effect ◽  
Magnetic Shielding ◽  
Nmr Method ◽  
Free Atoms ◽  
Limits Of Error

AbstractThe ratios of the gI-factors of 85Rb and 87Rb and of 111Cd and 113Cd have been measured in aqueous solutions of salts by the NMR method with high accuracy. A comparison with the same ratios measured by optical pumping techniques in free atoms shows agreement within the limits of error of 2.3 · 10-6 in the case of rubidium and of 3 · 10-7 in the case of cadmium: No difference in the magnetic shielding between the isotopes is observable.

Chaleur de dilution de solutions aqueuses d'acide polyacrylique, de son sel de sodium et de l'acide propionique

1971 ◽  
Vol 49 (24) ◽  
pp. 3935-3939 ◽  
Author(s):  
Jean-Pierre Cartier ◽  
Hubert Daoust
Keyword(s):  
Aqueous Solutions ◽  
Propionic Acid ◽  
Polyacrylic Acid ◽  
Sodium Polyacrylate ◽  
Heat Of Dilution ◽  
Concentrated Solutions ◽  
Sodium Salts ◽  
Structure Of Water ◽  
Calvet Microcalorimeter ◽  
Heats Of Dilution

With a Tian–Calvet microcalorimeter, heats of dilution at 25 °C have been measured for aqueous and acid (0.2 N HCl) solutions of polyacrylic acid and of propionic acid, and for aqueous solutions of the sodium salts of polyacrylic acid. The results are interpreted in terms of the change in structure of water resulting from the lengthening of the solute molecule. The heat of dilution of moderately concentrated solutions of sodium polyacrylate can be explained by the theory of Eigen and Wicke.

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