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Приказ резултата 11-20 од 78
The behaviour of mixed metal sulphide/silver suphide sensing materials in solutions of silver ions
(Analytica Chimica Acta, 1985)
Hydrophobized graphite electrodes activated with CuS/Ag2S can be used to measure silver ion activities as effectively as silver sulphide electrodes, whereas electrodes activatd with PbS/Ag2S or CdS/Ag2S are useless for ...
Two‐dimensional NMR spectra of sesquiterpenes. I—NOESY study of caryophyllenes from Inula spiraeifolia
(John Wiley & Sons Ltd., 1987)
The application of two‐dimensional NOE NMR spectroscopy (NOESY) for the stereochemical assignment of isomeric 14‐acetoxy‐13‐hydroxy‐ and 13‐acetoxy‐14‐hydroxy‐5,6‐caryophyllen‐7‐ones, and their acetylation products, is ...
Anodic deposition of colloidal gold
(Elsevier, 1984)
Colloidal gold solutions were prepared following classical recipes. When electrolysed between graphite electrodes, gold was found to deposit at the anode. The rate of deposition was dependent on the anode potential, on the ...
The Reductive Conversion of Some Cyclic and Acyclic vic-Epoxides to Alcohols by Means of Lithium Aluminium Hydride/Aluminium Trichloride
(Wiley, 1985)
Unsubstituted medium‐ring 1,2‐epoxycycloalkanes and certain vic‐epoxyalkanes are reduced to the corresponding alcohols very slowly when LiAlH4 alone is used as reducing agent. However, the combination of LiAlH4 and AlCl3, ...
Determination of low levels of cyanide with a silver/silver sulphide wire electrode
(Elsevier, 1987)
A silver/silver sulphide electrode is prepred quickly by holding a cleaned silver wire in vapours from molten sulphur. In 1000-10 mg l-1 cyanide solutions, the electrode exhibits a linear E/log CCN function which becomes ...
Structural effects in electrocatalysis
(Springer Science and Business Media LLC, 1982)
Studies of chemical reactions on well-defined surfaces provide fundamental data on surface reactivity and guidelines for the understanding and design of catalytic materials but few such studies have been done in electrocatalysis. ...
Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride
(Elsevier, 1980)
Two oxidizing agents were used for structural studies of the kerogen from Aleksinac shale (Yugoslavia), namely: (1) alkaline potassium permanganate, and (2) acidic ferric chloride. (1) The main goal with alkaline permanganate ...
Configurations in unsymmetrically N-methyl-N-substituted 2-phenylacetamides
(Elsevier, 1986)
The syntheses of a various N-methyl-N-substituted 2-phenylacetamides of the general formula PhCH 2 CON(CH 3 )R, wherein, R is ethyl, n-propyl, isopropyl and t-butyl group, were performed. The 1 H n.m.r. spectra of these ...
Solvent effect on conformational equilibria. Solvation energy as a function of solute position and orientation within a cavity in a dielectric medium
(Royal Society of Chemistry, 1985)
The reaction-field theory based on dipole and quadrupole interactions has been generalized, yielding an expression for the energy as a function of point dipole and quadrupole position and orientation within a spherical ...
The effect of anions on the electrochemical behaviour of aluminium
(Elsevier, 1983)
Aluminum has been known to exhibit widely different electrochemical properties in different aqueous electrolytes. Thus, OH- ions in strongly alkaline solutions reveal its strong affinity to water by dissolving its protective ...