Now showing items 451-460 of 479
An inorganic functional group approach to the systematic synthesis and reactivity studies of binuclear Mo/S and Mo/S/O complexes
(Elsevier, 1989)
A number of general reactions, based on molybdenum-coordinated sulphido or polysulphido ligands, can account for the synthesis of many members of the [Mo2V(S)n(S2)6-n]2-, [Mo2V(O)(S)n(S2)5-n]2- and [Mo2V(O)2(S)n(S2)4-n]2- ...
Human neutrophil protein kinase C: calcium-induced changes in the solubility of the enzyme do not always correlate with enzymatic activity
(Elsevier, 1988-07-29)
We hypothesized that calcium and 1,2-diacylglycerols stimulated human neutrophil (PMN) protein kinase C (EC 2.7.1.37) in a two-step mechanism. The proposed mechanism entails (1) increased insoluble protein kinase C activity ...
Thermophysics of metal alkanoates VII. Heat capacities and thermodynamic properties of potassium n-butanoate
(Elsevier, 1987-02)
The subambient heat-capacity curve of potassium n-butanoate as determined by adiabatic equilibrium calorimetry is characterized by a "bifurcated" transition whose "peaks" occur at 123.85 and 142.3 K. The corresponding (Cp, ...
Prostaglandin modulation of N-formylmethionylleucylphenylalanine-induced transmembrane potential changes in rat neutrophils
(Elsevier, 1984-07-20)
Prostaglandins of the E-series (PGEs) and PGI2 will inhibit formylmethionylleucylphenylalanine- (f-Met-Leu-Phe) induced lysosomal enzyme release and superoxide-anion (O-2) production by neutrophils. The inhibitory effects ...
RO-Vibrational state densities based on spectroscopic data for non-separable systems
(Elsevier, 1989-07-21)
A Monte Carlo procedure for calculating the density of states is described. The method is based on an expansion of the eigenstate energies as term values, and coupling among vibrations and rotations is explicitly included. ...
The total synthesis of the water mold sex hormone oogoniol
(Elsevier, 1989)
The water mold sex hormone oogoniol (1a) has been synthesized from adrenosterone in 18 steps in 7.0% overall yield. The crucial step introduces the stereochemistry at C-15 and C-20 through a highly efficient 1,4-addition ...
Theoretical treatment of cholesterol monohydrate dissolution in Renex-690/ionic surfactant systems based on a physical model approach
(Elsevier, 1984-10)
The dissolution kinetics of cholesterol monohydrate in the presence of Renex-690 and ionic surface active agents (benzalkonium chloride and sodium dodecyl sulfate) are dramatically influenced by the addition of NaCl. The ...
4,14-divinyl-(,)-[4.4]paracyclophane-1, 11-diene. An unusual product from a 1,10-Hofmann elimination
(Elsevier, 1986)
The isolation of 4,14-divinyl-(,)-[4.4]paracyclophane-1,11-diene from the cyclodimerization reaction of 7,8-divinyl--quinodimethane and its characterization are described. The title compound features head-to-tail, cofacially ...
Comment on enhanced Raman scattering from adsorbates on semiconductor surfaces
(Elsevier, 1984-11-02)
A recently published model of surface enhanced Raman scattering from adsorbed molecules on semiconductor surfaces is compared to our experimental results for amorphous carbon on PbTe. The model fails to account for the ...
The stereochemistry of ethylene-1,2-d2 epoxidation over silver catalysts
(Elsevier, 1980-10)
The stereochemistry of the catalytic epoxidation of cis-ethylene-1,2-d2 to ethylene oxide over four unsupported and two supported silver catalysts as well as over Ag2O and AgO was studied. Variations of the stereochemistry ...