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The determination of kinetics parameters of the hydrogen evolution on Ti-Ni alloys by ac impedance
(Pergamon-Elsevier Science Ltd, Oxford, 1997)
The kinetics and mechanism of hydrogen evolution at Ti-Ni alloys electrode has been studied by means of steady-state potentiostatic polarization and ac impedance spectrum measurements. Complex-plane spectrum plots are ...
Thermal investigations of some AlPO and MeAPO materials prepared in the presence of HF
(Elsevier, Amsterdam, 1997)
Hydrothermal synthesis of chabazite-like AlPO4 in a fluoride medium, using piperidine as the structure directing agent, is also successful in the preparation of transition-metal-modified AlPO products. The transition metal ...
A CoAPO-34 derived from a triclinic precursor prepared in the presence of HF
(Elsevier Science Inc., 1997)
The fluoride route of synthesis of AIPO,-34 is also successful in the preparation of its cobalt modified product (CoAPO-34). The triclinic precursor of CoAPO-34 has been synthesized in the presence of HF and piperidine. ...
Optimization of carboxymethylcellulose production
(Editura Acad Romane, Bucuresti, 1997)
The aim of the study was to obtain water soluble carboxymethylcellulose (CMC) with a high degree of polymerization (DP gt 600) and high degree of substitution (DS gt 800), in industrial conditions, from easily degradable ...
Conformations of unsymmetrical N-t-butyl-N-substituted 2-phenylacetamides
(Elsevier B.V., 1997)
Various N-t-butyl-N-substituted 2-phenylacetamides, PhCH2CON(t-Bu)R, wherein R is methyl, ethyl, n-propyl, n-butyl, i-propyl, phenyl and cyclohexyl, were synthesized, Depending on the kind of substituent on the nitrogen ...
The influence of permanent dipole moments on second harmonic generation in asymmetric semiconductor quantum wells
(Elsevier, Amsterdam, 1997)
The influence of permanent dipole moments on intersubband double resonance second harmonic generation in asymmetric quantum wells is analyzed. It is found that in realistic QWs matched for 10.6 mu m pump the permanent ...
Benzylation of N-phenyl-2-phenylacetamide
(Natl Inst Science Communication, New Delhi, 1997)
Benzylation of N-phenyl-2-phenylacetamide with benzyl chloride in the presence of powdered KOH has been carried out to find out the possible reaction products as well as to ascertain optimal reaction conditions for the ...
Preparation of Two Cobalt-Substituted Zincophosphate Molecular Sieves
(Marcel Dekker, Inc., 1997)
Two different open-framework cobalt-zincophosphate phases crystallise from the same reaction mixture at ambient conditions depending on the preparative procedure. One of them is a sodalite analogue containing up 70 8 wt.% ...
HREM observations of mechanical twinning in Cu-Ti alloys: Structure of incoherent and coherent twin interfaces
(Minerals, Metals & Materials Soc (TMS), 1997)
The flow of Cu-Ti alloys hardened by coherent β′ precipitates (Cu4Ti, D1a superstructure) is particularly interesting since these alloys show profuse twinning on multiple systems after small amounts of plastic flow by slip. ...
Synthesis and FTIR spectroscopic study of some N-monosubstituted propanamides
(Elsevier, Amsterdam, 1997)
In the present work we investigated the conformations of some N-mono-substituted propanamides of general formula CH3CH2CONHR, wherein R is chosen from n-(C-1-C-9)alkyl, cyclo(C-3-C-6)alkyl, some branched (C-3-C-6)alkyl or ...