Now showing items 21-30 of 53
The reaction of chlorotetrafluorophosphorane with trimethylamine
(Elsevier, 1980)
The reaction of chlorotetrafluorophosphorane with trimethylamine affords a 1:1 Lewis acid-base complex of composition ClF4P[middle dot]NMe3. It has been established by 1H and 19F NMR spectroscopy that the Cl and Me3N ligands ...
Mechanism of cholesterol gallstone dissolution. I. The determination of the binding of alkyl amines to bile micelles using dynamic membrane transport methods
(Elsevier, 1980-03)
Recent studies have shown that cholesterol monohydrate pellet dissolution rates in real and synthetic bile systems are enhanced dramatically in the presence of small concentrations of amines (primary, secondary, and ...
The novel synthesis of a [6:5:6] linear isoguanosine type tricyclic nucleoside using carbonyl sulfide
(Elsevier, 1980)
The novel one-step synthesis of a fused pyrimidin-2-one-4-thione derivative from an -aminonitrile using carbonyl sulfide is described.
Mechanism of cholesterol gallstone dissolution. III. Electrophoretic studies showing the correlation between the bile micellarcharge and the effect of alkyl amines as cholesterol gallstone dissolution rate accelerators
(Elsevier, 1980-03)
We have shown that the cholesterol monohydrate dissolution rate acceleration in chenodeoxycholic acid solutions due to the addition of hexylamine and octylamine may be directly related to their ability to bind to the ...
Module for rapid normal and inverse normal pulse polarography: application to study of adsorption
(Elsevier, 1980-01-25)
Construction and utilization of a module for interfacing with a rapid response potentiostat are described, which permits use of normal pulse polarography (NPP) and inverse normal pulse polarography (INPP). In trace analysis ...
Field-dispersion profiles of the proton spin-lattice relaxation rate in chloroplast suspensions. Effect of manganese extraction by EDTA, Tris, and hydroxylamine
(Elsevier, 1980-08-05)
Proton spin-lattice relaxation rates (R1) have been measured in a variety of dark-adapted chloroplast suspensions over a range of field strengths between 1 and 15 kG (4-5 MHz). When the effects of EDTA or Tris washing on ...
Thermophysics of the lanthanide trihydroxides II. Heat capacities from 10 to 350 K of Nd(OH)3 and Tb(OH)3. Lattice and Schottky contributions
(Elsevier, 1980-04)
Heat capacities have been measured from near 7 to 350 K for Nd(OH)3 and Tb(OH)3 and the derived thermophysical properties evaluated using previously reported heat capacities at lower temperatures. At 298.15 K the values ...
Inhibition by lead of human erythrocyte (Na+ + K+)-adenosine triphosphatase associated with binding of 210Pb to membrane fragments
(Elsevier, 1980-07-16)
Fragmented human erythrocyte membranes were exposed to PbCl2 for 10-40 min at 23[deg]C prior to (Na+ + K+)-ATPase assay. Inhibition increased with exposure time. Enzyme activity in 5 [mu]g membrane protein was inhibited ...
Vibrational analysis of peptides, polypeptides, and proteins. V. Normal vibrations of Β-turns
(Wiley Subscription Services, Inc., A Wiley Company, 1980-01)
The normal modes have been calculated for Β-turns of types I, II, III, I′, II′, and III′. The complete set of frequencies is given for the first three structures; only the amide I, II, and III modes are given for the latter ...
The heat capacity of NH4Br from 265 to 550 K the II-to-I transition
(Elsevier, 1980-08)
The heat capacity of NH4Br has been measured from 265 to 550 K by precision adiabatic calorimetry. The results of these measurements were combined with existing low-temperature results to give thermodynamic functions up ...