Now showing items 91-100 of 426
The microwave spectrum of cyclopropane [middle dot] ammonia. A novel structure for cyclopropane complexes
(Elsevier, 1994-02-18)
The microwave spectrum of the cyclopropane[middle dot]ammonia (C3H6[middle dot]14NH3) complex has been observed using a pulsed nozzle, Fourier-transform microwave spectrometer. The spectrum is characteristic of a symmetric ...
Vibrational analysis of 2,3,4-trichloropentanes
(Elsevier, 1990)
One meso form and the racemic isomer of 2,3,4-trichloropentane have been synthesized, and their infrared and Raman spectra analysed on the basis of a general force field refined for multiply-chlorinated hydrocarbons. ...
Generalized Unsöld theorem and radial distribution function for hydrogenic orbitals
(Kluwer Academic Publishers; J.C. Baltzer AG, Science Publishers ; Springer Science+Business Media, 1993-12)
A generalization of Unsöld's theorem is derived, giving the sum over both l and m for products of hydrogenic functions with given n . A generalized radial distribution function D n (r) is introduced and its properties ...
Interactions of von Willebrand factor on mica studied by atomic force microscopy
(Elsevier, 1992-01)
Three-dimensional molecular level images of uncoated human von Willebrand factor (vWF), a plasma glycoprotein, have been obtained using atomic force microscopy (AFM). However, the structural detail obtained by AFM was found ...
Objective models for steroid binding sites of human globulins
(Kluwer Academic Publishers; Springer Science+Business Media, 1997-01)
We report the application of a recently developed alignment-free 3D QSAR method [Crippen,G.M., J. Comput. Chem., 16 (1995) 486] to a benchmark-type problem. The test systeminvolves the binding of 31 steroid compounds to ...
Canonical partition function for the hydrogen atom in curved space
(Kluwer Academic Publishers; J.C. Baltzer AG, Science Publishers ; Springer Science+Business Media, 1996-10)
The electronic partition function for the hydrogen atom was recently derived by integration over the Coulomb propagator. A much simpler derivation is given here, based on Schrödinger's exact solution for a hydrogenic atom ...
Treatment of redundancies among internal coordinates in optimizing molecular mechanics force constants
(John Wiley & Sons, Inc., 1992-11)
The use of redundant coordinate bases in the construction of molecular mechanics force fields is discussed. It is shown that the intrinsic indeterminacy in a force field in redundant coordinates in general stems from the ...
Continuous medium perfusion leads to long-term cell viability and oxygen production in high-density photobioreactors
(Kluwer Academic Publishers; Chapman & Hall, London ; Springer Science+Business Media, 1995-11)
A light-emitting diode-based photobioreactor (LED-based PBR) operated in a continuous perfusion mode with a perfusion rate of 3 to 6 reactor volumes a day supports high-density algal cultures, of cell concentrations up to ...
Some P---H bond substitution derivatives and fluxionality of Cp2Mo2([mu]-H)([mu]-PHPh)(CO)4
(Elsevier, 1992-11-10)
Reaction of PH2Ph with Cp2Mo2(CO)4 (Mo[triple bond]Mo) results in sequential formation of Cp2Mo2(CO)4(PH2Ph)2 and fluxional Cp2Mo2([mu]-H)([mu]-PHPh)(CO)4. Proton abstraction from Cp2Mo2([mu]-H)([mu]-PHPh)(CO)4 affords ...
Sulfided heterogeneous, bimetallic Ru/Mo catalysts derived from mixtures of Ru 3 (CO) 12 (or RuCl 3 ) and a molybdenum heteropolyanion: The reactions of ethanol with tetrahydroquinoline
(John Wiley & Sons Ltd., 1992-09)
Efforts have been made to develop Ru/Mo bimetallic catalyst systems for hydrodenitrogenation (HDN) of tetrahydroquinoline (THQ). In the course of these studies, it was discovered that in ethanol, under hydrogen and in the ...