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Приказ резултата 71-80 од 86
The effect of the plasma composition on characteristics of the d.c. arc—IV: Influence of lithium on an arc in nitrogen
(Elsevier, 1971)
The radial temperature distribution of the arc burning in nitrogen was measured when a large quantity of Li2CO3 evaporates in the arc. In comparison to the radial temperature distribution of the arc burning in nitrogen ...
A new type of d.c. arc as spectrochemical light source
(Elsevier, 1974)
A new type of d.c. arc light source for spectrochemical purposes has been developed. The horizontal arc burning in a graphite tube is placed in an inhomogeneous magnetic field. The limits of detection of In and Pb have ...
Investigations of the Arc Burning in the Water Vapour Atmosphere
(Wiley, 1975)
The functions of thermal conductivity α(T) and electrical conductivity σ(T) for water vapour, within the temperature intervals 7700–8000 K and 2000–3500 K, were calculated. These calculations were performed by using the ...
Einfluß der Anionen bei spektrochemischer: Spurenanalyse im lichtbogen
(Elsevier, 1971)
The influence of the addition of ammonia into the arc plasma on the spectral line intensities (with background correction) of trace elements was studied. The intensity changes caused by addition of ammonium sulphate and ...
Study of the reactions of hexanitrocobaltates(III) with amino acids. VII. Geometrical isomerism and absolute configuration of dinitrobis(aminoacidato)cobaltate(III) ions
(Elsevier, 1971)
Dinitrobis(aminoacidato)cobaltate(III) salts with L-α-aminobutyric acid, aminoisobutyric acid, L-valine, L-norvaline, L-leucine, L-norleucine, and L-isoleucine were prepared and resolved into optical isomers. We report ...
The effect of a localized deformation upon the common-emitter transistor current gain
(Elsevier, 1971)
Starting from the theory of the influence of pressure upon the semiconductor band diagram, and the Kroemer's proof of existence of different forces Fn and Fp acting upon the electrons and holes, a system of equations is ...
Photochemically induced oxidation of some steroidal isoxazolidines by molecular oxygen
(Royal Society of Chemistry, 1977)
U.v. irradiation of the steroidal isoxazolidines 5α,10α-imino- oxy-5(10 → 1βH)abeo-5α-cholestan-3β-olacetate (1a) and the corresponding N-methyl and N-acetyl derivatives (1b) and (1c) in various solvents in the presence ...
Reflectance study of cation adsorption on oxide layers of gold and platinum electrodes
(Elsevier Sequoia S.A., Lausanne, 1979)
Analysis of the organic matter of oil shales by nuclear magnetic resonance
(Pergamon Press, 1978)
13C NMR spectroscopy was applied in the investigation of the structure of the organic matter in oil shales. By using Proton Enhanced Nuclear Induction Spectroscopy, a fair resolution of aliphatic and aromatic carbon signals ...