Now showing items 121-130 of 152
Defined Analyte-Enzyme Conjugates as Signal Generators in Immunoassays
(Elsevier, 1993-04)
We investigated the synthesis of progesterone-horseradish peroxidase (P-HRP) conjugates and products purified by affinity chromatography. The obtained preparations were characterized with an immobilized monoclonal antibody ...
An STM study of molecular-beam epitaxy growth of GaAs
(Elsevier, 1993-01-10)
Scanning tunneling microscopy has been used to investigate molecular-beam epitaxy growth of GaAs. By quenching the sample during deposition, we have imaged the GaAs(001) surface as it appeared during growth. Large scale ...
The dynamical transition to step-flow growth during molecular-beam epitaxy of GaAs(00l)
(Elsevier, 1993-12-20)
Scanning tunneling microscopy studies have been performed on GaAs homoepitaxial films grown by molecular-beam epitaxy. Images show that in the earliest stages of deposition the morphology oscillates between one with ...
The Genes Encoding Gonadal and Nongonadal Forms of 3[beta]-Hydroxysteroid Dehydrogenase/[Delta]5-[Delta]4 Isomerase Are Closely Linked on Mouse Chromosome 3
(Elsevier, 1993-04)
The biosynthesis of steroid hormones in the gonads and adrenal glands requires the activities of the enzyme 3[beta]-hydroxysteroid dehydrogenase/isomerase (3[beta]HSD) which catalyzes the NAD+-dependent dehydrogenation and ...
Electric Dipole Moments of Rare Gas-Carbonyl Sulfide van der Waals Complexes
(Elsevier, 1993-08)
The [mu]a and [mu]b electric dipole moment components of the Ne-OCS, Ar-OCS, and Kr-OCS van der Waals complexes were determined using Fourier transform microwave spectroscopy. The accuracy of these results was evaluated ...
Role of tyrosine 129 in the active site of spinach glycolate oxidase
(Blackwell Publishing Ltd, 1993-05)
Synthesis of novel polyhydroxylated quinolizidines: Ring expanded analogs of glycosidase inhibitory indolizidines
(Elsevier, 1993-12-17)
Two polyhydroxylated quinolizidines, (1R,2R,3R,9S,9aR)-1,2,3,9-tetrahydroxyquinolizidine 9 and (1R,2R,3R,9R,9aS-1,2,3,9-tetrahydroxyquinolizidine 10, have been synthesized by the reductive double cyclization of 15[alpha] ...
Heat capacities of the wustites Fe0.9379O and Fe0.9254O at temperatures T from 5 K to 350 K. Thermodynamics of the reactions: xFe(s) + (1/4)Fe3O4(s) = Fe0.7500+xO(s) = Fe1-yO(s) at T [approximate] 850 K, and properties of Fe1-yO(s) to T = 1000 K. Thermodynamics of formation of wustite
(Elsevier, 1993-09)
Thermodynamic properties of wustites prepared from iron and iron(III) oxide, have been studied by adiabatic calorimetry. Heat-capacity measurements of metastable Fe0.9379O and Fe0.9254O from T = 5 K to 350 K yielded the ...
Centrifugal Distortions in Linear Triatomic Molecules: Application of an ab Initio Approach to HCP
(Elsevier, 1993-12)
Our previously outlined method (J. Mol. Struct. THEOCHEM99, 265-270, 1989) for employing analytic quantum chemical gradients to calculate the geometries, energies, and quartic spectroscopic constants for centrifugally ...
Distribution of the admixture test for the detection of linkage under heterogeneity
(Wiley Subscription Services, Inc., A Wiley Company, 1993)
The admixture test for the detection of linkage under heterogeneity is considered. We show that the null distribution of this test statistic has half its weight concentrated on zero and the other half on a complicated ...