Now showing items 31-40 of 183
Isolation and characterization of a glycopeptide from human senescent erythrocytes
(Elsevier, 1983-08-16)
A glycopeptide (called "senescence-factor glycopeptide", SF-G) has been isolated from a tryptic digest of human erythrocytes by specific adsorption and elution from immobilized peanut lectin. SF-G was detectable in old but ...
The thermodynamics of ammonium indates II. The molar heat capacity of the ammonium pentabromoindate monohydrate salt (NH4)2InBr5 [middle dot] H2O from 7.8 to 348 K
(Elsevier, 1988-11)
The molar heat capacity of ammonium pentabromoindate monohydrate (NH4)2InBr5 [middle dot] H2O was measured from 7.8 to 348 K using adiabatic calorimetry. The curve of heat capacity as a function of temperature is continous. ...
Preparation of 1-deuterioaldehydes via tub use of diisobutylaluminum deuteride (DIBAL-D)
(Elsevier, 1984)
Deuterioaldehydes, essential precursors In the preparation of chiral primary deuterioalcohols, have been prepared in yields ranging from 55-75% via reduction of methyl and ethyl esters at -78[deg]C with diisobutylaluminun ...
Synthesis of fused pyrrolines by the intramolecular cycloadition of azides application to the pyrrolizidine alkaloids.
(Elsevier, 1985)
Intramolecular 1,3-dipolar cycloaddition of azide 4 proceeds through triazoline 5 and vinyl aziridine 6, resulting in the formation of the 1,5-homodienyl shift product 7 and the tetrahydropyrrolizines 8 and 9. Compound 8 ...
Fluorescence yield near edge spectroscopy of [pi]-bonded CO on Fe(100)
(Elsevier, 1989-12-03)
Near edge X-ray absorption fine structure (NEXAFS) spectra of CO adsorbed on the Fe(100) surface are reported. Spectra, obtained by fluorescence yield (FYNES), are presented for each of the four individual CO adsorption ...
A Mild Oxidation of 1.1 - Diorganometallics to Ketones and Aldehydes. A New Stereoselective Aunroach to Aldol products - Part 1
(Elsevier, 1988)
The 1,1-diorganometallics of magnesium and zinc 1 are converted by the reaction with Me3SnCl to the 1,1-diorganometallics of tin and zinc 2 which are readily oxidized by dry air at -10[deg] to 0[deg]C to afford the ...
The thermodynamics of ammonium scheelites V. Heat capacity of deuterated ammonium metaperiodate ND4IO4 from 8 to 329 K
(Elsevier, 1987-10)
The heat capacity of the scheelite salt: deuterated ammonium metaperiodate, ND4IO4, was measured from 8 to 329 K using adiabatic calorimetry. The heat capacity against temperature curve shows a broad maximum with a peak ...
Hydroformylation as a simple and efficient one carbon homologation of homoallylic alcohols. Synthesis of prelog-djerassi lactone.
(Elsevier, 1984)
A hydroformylation oxidation sequence is described for the efficient conversion of homoallylic alcohols to [delta]-lactones. The methodology is applied to the synthesis of Prelog-Djerassi lactone.
Metal complex-catalyzed redistribution reactions of organosilanes : IV. Redistribution reactions of methylsiloxanes catalyzed by transition metal complexes
(Elsevier, 1982-10-19)
Redistribution reactions of a variety of hydrogen-substituted siloxanes are catalyzed by various transition metal complexes of iridium and rhodium. The products arise from breaking and remaking of Si---C, Si---H, and Si---O ...
Raman and normal mode studies of the polypeptide chain conformations in crystalline magnesium and calcium poly(-glutamate)s
(Elsevier, 1985)
An analysis of the Raman spectra of dry crystalline magnesium and calcium poly(-glutamate)s, based on a normal mode calculation of [alpha]-helical poly(-glutamate), shows that the polypeptide chains in both salts have an ...