Претраживање
Приказ резултата 11-20 од 225
On the possibility of the preparation open framework manganese phosphate
(Elsevier Inc., 1996)
Manganese(ll)/phosphate/organic template hydrothermal reactions were investigated with the aim of preparing novel crystalline porous materials. Ethylenediamine, isopropylamine, and piperidine were explored as organics that ...
On the possibility of incorporating Mn(II) and Cr(III) in SAPO-34 in the presence of isopropylamine as a template
(Butterworth-Heinemann, 1993)
Hydrothermal synthesis of SAPO materials using isopropylamine (i-PrNH2) as the template leads to the formation of MnAPSO-34 if Mn(II) is present. In the presence of Cr(III), the synthesis yields SAPO-34 containing ...
Dehydration behavior of some microporous zincophosphates
(Elsevier, 1996)
The dehydration behavior of two synthetic, unsubstituted and cobalt-substituted, zincophos phates (one a sodalite analog and the other a new, hexagonal phase) was studied by TG/DTG and DSC. TG/DTG curves of the sodalite ...
Phase-transfer catalyzed N-ethylation of N-ethyl-2-phenylacetamide
(Natl Inst Science Communication, New Delhi, 1996)
Phase-transfer catalyzed N-ethylations of N-ethyl-2-phenylacetamide (EPA) in the presence of powdered KOH (solid-liquid system) have been carried out in order to establish the effect of catalyst structure on the reaction. ...
Multiaxial determination of the resistance to creasing of clothing wool fabrics
(Emerald Group Publishing Limited, Bradford, 1999)
In this paper, values of deformation components (elastic, viscoelastic, plastic) of clothing wool fabrics by measuring the crease recovery angle in various directions to the warp direction (0°-warp, 30°, 45°, 60°, and ...
Synthesis and characterization of the CoSAPO- 14 and CoSAPO-34
(Butterworth Publishers, 1990)
The hydrothermal synthesis of CoSAPO-14 and CoSAPO-34 in the presence of isopropylamine as the template is described. CoSAPO-14 is a new MeSAPO material that predominantly forms at 125°C, whereas CoSAPO-34 is the main ...
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 ...
Thermal shock behavior of alumina based refractories: fracture resistance parameters and water quench test
(Elsevier, Amsterdam, 1999)
The prediction of refractories thermal shock behavior can be estimated on two basis: heat transfer conditions and/or fracture mechanics concept. Materials considered in our analysis were alumina based refractories with ...
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. ...
Retention behavior of some amides in reversed- and normal-phase thin-layer chromatography
(Springer Heidelberg, Heidelberg, 1992)
The retention behavior and separation ability of reversed- and normal-phase TLC with, polar and nonpolar mobile phases, has been studied by measuring the retentions of a series of amides. The retention behavior and separation ...