Now showing items 811-820 of 861
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 ...
Mass transfer in engineering practice, By Aksel L. Lydersen, Published by John Wiley & Sons, April 1983, 321 pp. $39.95
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1985-01)
No Abstract.
Synthesis and polymerization of ( E , E )-[6.2](9,10)anthracenophane-1,5-diene
(John Wiley & Sons, Inc., 1989-01-30)
The title compound has been synthesized by dimerization of a substituted p -xylylene, generated via a 1,8-Hofmann elimination. Several unique isomers of this dimer are also obtained. The title diene can be polymerized ...
Self-sustained oscillations in a heterrogeneous catalytic reaction: a monte carlo simulation
(Elsevier, 1989)
We have utilized Monte Carlo methods to study the kinetics of a generic heterogeneous catalytic reaction, A+B-->AB. This reaction includes the elementary steps of adsorption and desorption of reactants A and B, surface ...
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 ...
The role of conduction/valence bands and redox potential in accelerated mineral dissolution
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1986-10)
The dissolution kinetics of a number of manganese oxides in acidic solutions were studied. Using a slurry reactor, rate laws were determined for each of the manganese oxides in the hydrohalogen acids. Significant variations ...
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 ...