Now showing items 1-10 of 21
Stereochemistry in the cyclization of -azidophenylalkenes to indoles
(Elsevier, 1983)
- and --azidostilbene, -azido-[beta]-methylstilbene, and ()--azido[beta]-deuteriostyrene give indoles on thermolysis by a mechanism involving attack by a nitrene directly on the [beta] carbon atom, and not by insertion.
Structure of a water-insoluble -glucan isolated from a streptococcal organism
(Elsevier, 1983-08-16)
The structure of the extracellular polysaccharide (water-insoluble -glucan) from an anaerobic, Gram-positive coccus organism (Streptococcus) has been investigated. Acid hydrolysis of the methylated glucan yielded 2,3,4,6-tetra-, ...
Isolation and characterization of a glycopeptide from human senescent erythrocytes
(Elsevier, 1983-08-16)
A glycopeptide (called "senescence-factor glycopeptide", SF-G) has been isolated from a tryptic digest of human erythrocytes by specific adsorption and elution from immobilized peanut lectin. SF-G was detectable in old but ...
Thermophysics of metal alkanoates II. Heat capacities and thermodynamic properties of sodium propanoate
(Elsevier, 1983-07)
The heat capacity of sodium propanoate has been measured from 9 to 580 K by adiabatic calorimetry and considerable metastability noted between 60 and 215 K. Values at 298.15 K of Cp,m/R, Smo/R, "Hmo-Hmo(0)'/R, and ...
A novel approach towards the synthesis of the 3,4,5-trihydro-1,3-diazepin-5-ol ring structure
(Elsevier, 1983)
A catalytic reduction of the nitrile portion of the trimethylsilyl cyanohydrin to a primary amine has produced an situ annulation to generate the 3,4,5-trihydro-1,3-diazepin-5-ol ring. This ring substructure has demonstrated ...
Surface enhanced raman spectroscopy of halide ions on colloidal silver: morphology and coverage dependence
(Elsevier, 1983-01-02)
Transmission electron microscopy shows that the colloidal silver used as a substrate for surface enhanced Raman spectroscopy consists of 75-135 A average diameter faceted crystals, which can be made to aggregate in clusters ...
Characterization of a hybrid flame/arc excitation source using monodisperse aerosol introduction
(Elsevier, 1983)
A hybrid flame/arc excitation source together with a monodisperse droplet generator is used to inject solute particles into selected regions of the arc plasma. With astigmatic image transfer and a 0.5 [mu]s time constant ...
Synthesis of cyclic and polymeric derivatives of 1,2-dithiol-o-carborane
(Elsevier, 1983-01-18)
Cyclic compounds containing two symmetrically placed 1,2-dicarbaclosododecaboranyl or two 7,8-dicarbaundecaborate(10) moieties have been synthesized. The bridges between the carborane cages are S---S or S---CH2---CH2---S ...
The stability of SiO-based ceramics containing ZRO2 and other oxides
(Elsevier, 1983)
Calculations of thermochemical equilibria, using the program SOLGASMIX, have defined the conditions and compositions of SiO-based ceramics in which stable ZrO2 particles can be obtained. The results are compared with ...