Now showing items 111-120 of 483
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 ...
Guanine nucleotides reduce the free calcium requirement for secretion of granule constituents from permeabilized human neutrophils
(Elsevier, 1986-11-28)
Human neutrophils can be permeabilized with the cholesterol complexing agent digitonin and then induced to secrete lysosomal constituents by increases in free Ca2+ alone. In order of increasing requirements for Ca2+, vitamin ...
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 ...
Thermophysics of metal alkanoates VI. Heat capacities and thermodynamic properties of lithium n-pentanoate and n-heptanoate
(Elsevier, 1986-12)
The adiabatic calorimetric study (at 5 to 350 K) of lithium n-pentanoate and n-heptanoate proved that solid-state transitions occur at Ttrs/K = 209.31 and 319.06 in the former salt, and at Ttrs/K = 317.08 in the latter ...
NMR relaxivity changes in chloroplast suspensions. Effects of NH2OH and of treatments altering the redox state of the photosynthetic electron transport chain
(Elsevier, 1980-12-03)
Treatments (illumination, chemical oxidation or reduction) which are potentially capable of producing paramagnetic centers in chloroplast thylakoid membranes do not produce enhancements of the proton magnetic relaxivities ...
Muscarinic receptor-stimulated Ca2+ signaling and inositol lipid metabolism in avian salt gland cells
(Elsevier, 1986-11-28)
Activation of muscarinic cholinergic receptors was studied by measuring agonist-stimulated inositol lipid turnover and changes in [Ca2+]i in dissociated salt gland secretory cells. Carbachol stimulation of quin2-loaded ...
The activity and properties of an acidic triacylglycerol lipase from adult and fetal rat lung
(Elsevier, 1986-01-03)
Triacylglycerol lipase with maximal activity at pH 5 was present in adult and fetal lung. The activity was inhibited by serum concentrations used to measure lipoprotein lipase and by 0.5 M NaCl. The activity in homogenates ...
Thermodynamics of copper sulfides III. Heat capacities and thermodynamic properties of Cu1.75S, Cu1.80S, and Cu1.85S from 5 to about 700 K
(Elsevier, 1987-12)
The heat capacities of Cu1.75S, Cu1.80S, and Cu1.85S have been measured by adiabatic-shield calorimetry from 5 to about 700 K. The heat-capacity curves show transitions near 312, 337, and 355 K in Cu1.75S and Cu1.80S and ...