Претраживање
Приказ резултата 31-40 од 174
Single-particle settling velocity through liquid fluidized beds
(Elsevier, 1991)
Single-particle settling velocities through waterfluidized
beds have been studied experimentally using
a standard fluidtzation column 40 mm in diameter.
All the particles used were spherical. The combinations
of ...
Sesquiterpene lactones from Achillea crithmifolia
(American Chemical Society, 1994)
The isolation of three highly oxygenated guaianolides, desacetyl-1α-4α- dihydroxybishopsolicepolide [1], its 4β-hydroxy epimer 2 (a new compound), and 1β,2β:3β,4β-diepoxy-8α,10α-dihydroxyguai-12(13)-en-12,6α-olide [3], ...
Sesquiterpene lactones from Achillea crithmifolia
(Elsevier, 1991)
The isolation of guaianolides rupicolin-A, rupicolin-B, their acetates and a new germacranolide 1β,10α-epoxy-3β,9β-diacetoxy-11α,13-dihydrocostunolide, identified by means of PS DQF COSY and PS NOESY, from Achillea ...
Sesquiterpene lactone from Achillea crithmifolia
(Elsevier, 1993)
Achillea crithmifolia Waldst. et Kit. (Asteraceae) is used in folk medicine against the same disorders as the well known Achillea millefolium L. (Asteraceae). Hitherto, four guaianolides (rupicolin-A and -B and their ...
Three-Way Activity and Sulfur Tolerance of Single Phase Perovskites
(Elsevier, 1991)
Single phase perovskites, as LaCoO3, LaCrO3, La Co0 5 Cr0 5O3, La0.7Sr0 3CrO3 and La0 7Sr0 3Cr0 95Ru0 05O3, were synthesized and three-way activity and sulfur tolerance were measured in a pulse-flame catalyst testing system ...
Substitued (E)-β-(benzoyl)acrylic acids suppressed survival of neoplastic human HeLa cells / Umanjeno preživljavanje neoplastičkih humanih HeLa ćelija supstituisanim (E)-b-(benzoil) akrilnim kiselinama
(Belgrade : Serbian Chemical Society, 1999)
The bacteriostatic activity of some of alkyl substituted (E)-β-(benzoyl)acrylic acids was shown earlier. The aim of this study was to investigate the antiproliferative action of 19 alkyl-, or halogeno-, or methoxy-, or ...
Examination of the kinetics of Zr1.02Ni0.98 alloy hydriding / Ispitivanje reakcije hidriranja legure Zr1.02Ni0.98
(Belgrade : Serbian Chemical Society, 1999)
The hydriding kinetics of Zr1.02Ni0.98 alloy was examined in dependence on the number of hydriding/dehydriding cycles. The rate constants relating to three subsequent hydriding procedures of an alloy sample, at five ...
The effect of the pause-to-pulse ratio on the morphology of metal powder particles electrodeposited by square-wave pulsating overpotential
(Switzerland : Springer Nature, 1991)
It is well known that the deposition conditions such as
bath composition, hydrodynamic regime, temperature,
current density, exhibit a strong effect on the grain size
and the morphology of electrodeposited metal ...
A New Approach to Metal Electrodeposition at a Periodically Change Rate. Part I. The Reversing Overpotential Method
(Elsevier, 1999)
A method of increasing the apparent deposition exchange current density value in reversing overpotential (RO) copper electrodeposition is described. In pulsating overpotential (PO) metal electrodeposition, the current ...
Scanning tunnelling microscopy of the nucleation and growth of sputter-deposited Cr on graphite
(Elsevier, 1995)
In this paper, we present a study of the nucleation and growth stages of sputter-deposited Cr thin films on highly oriented pyrolytic graphite (HOPG) substrates using scanning tunnelling microscopy (STM) in air. Freshly ...