Претраживање
Приказ резултата 11-20 од 775
NaY zeolite: A useful catalyst for nitrile hydrolysis
(Molecular Diversity Preservation International, Basel, 2000)
The NaY zeolite catalysed hydrolysis of nitriles to primary amides is reported. It is found that aryl nitriles with strong electron-withdrawing substituents and cyanopyridines are readily hydrolysed in the water suspension, ...
Intraoperative anaphylactic shock in a child with no history of type I hypersensitivity
(Tehran Univ Medical Sciences, Tehran, 2008)
Natural rubber latex is the second most implicated agent in intraoperative anaphylactic reactions. This report describes a case of intraoperative anaphylaxis occurring in a non-atopic fourteen-year-old girl undergoing ...
Screening of selenium absorption ability of mycelia of selected Pleurotus species
(Teknoscienze Publ, Milan, 2006)
Pleurotus species are economically high praised due to their edible and medicinal properties. Selenium is a trace element with antioxidant and anticarcinogenic effects. The aim of our research was to investigate the influence ...
Generation and intermolecular additions of pyridylmethyl radicals
(Georg Thieme Verlag Kg, Stuttgart, 2008)
2-, 3-, or 4-Pyridylmethyl radicals can be made to add to nonactivated alkenes to give a variety of otherwise inaccessible pyridine derivatives. Bicyclic structures can be obtained by combining the radical addition with ...
Synthesis, characterization and antitumor activity of novel N-substituted alpha-amino acids containing ferrocenyl pyrazole-moiety
(Elsevier Science Sa, Lausanne, 2009)
A series of new N-[(3-ferrocenyl-1-phenylpyrazol-4-yl)methyl] alpha-amino acids were prepared and characterized by a range of spectroscopic techniques and cyclic voltammetry. The in vitro antitumor activity of all synthesized ...
An easily accessed class of recyclable hypervalent iodide reagents for functional group oxidations: bis(trifluoroacetate) adducts of fluorous alkyl iodides, CF3(CF2)(n-1)I(OCOCF3)(2)
(Royal Soc Chemistry, Cambridge, 2005)
Reactions of commercial fluorous alkyl iodides RfnI (1-R-fn; R-fn = CF3(CF2)(n-1); n = 7, 8, 10, 12) with 80% H2O2 and trifluoroacetic anhydride give RfnI(OCOCF3)(2) (2-R-fn; 89-97%). These rapidly oxidize 1,4-hydroquinones ...
Gibberellic acid nitrite stimulates germination of two species of light-requiring seeds via the nitric oxide pathway
(New York Acad Sciences, New York, 2005)
We used two species of light-requiring seeds, Paulownia tomentosa, which have absolute light requirement (no germination in darkness), and Stellaria media seeds, which germinate in darkness to a certain extent because of ...
Alkylation of carbonyl compounds in the TiCl4-promoted reaction of trimethylsilyl enol ethers with ethylene oxide
(Pergamon-Elsevier Science Ltd, Oxford, 2000)
Titanium tetrachloride promoted reaction of trimethylsilyl enol ethers with ethylene oxide affords homoaldol type products in moderate/good yields. The reaction is believed to proceed via the titanium enolates. (C) 2000 ...
Midgut proteinase activities of cerambyx cerdo (coleoptera, cerambycidae) larvae fed on different diets / Proteinazne aktivnosti larvi ceramcerambyx cerdo (coleoptera, cerambycidae) hranjenih različitim supstratima
(Acta Entomologica Serbica, 2001)
Total proteolytic and leucyl-aminopeptidase activities were analyzed in the midgut of Cerambyx cerdo larvae fed on three different diets. The highest activities were found in the larvae fed on artificial diet.
Midgut proteinase activities of cerambyx cerdo (coleoptera, cerambycidae) larvae / Proteinazne aktivnosti srednjeg creva larve cerambyx cerdo (coleoptera, cerambycidae)
(Acta Entomologica Serbica, 2001)
Different proteolytic activities using natural and synthetic substrates were analyzed in the midgut of Cerambyx cerdo larvae. Significant leucyl-aminopeptidase and elastase-like activities, as well as some trypsin-like ...