Now showing items 11-20 of 187
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-, ...
Characterization of a circular thin film plasma source for atomic emission spectroscopy
(Elsevier, 1985)
A plasma source for analytical atomic emission spectroscopy is described based on the electrical vaporization by capacitive discharge of a thin Ag film deposited on a polycarbonate membrane filter. The source is designed ...
Thermophysics of the lanthanide trihydroxides IV. The heat capacity of Ho(OH)3 from 11 to 350 K. Lattice and Schottky contributions
(Elsevier, 1981-11)
From values of the heat capacity of microcrystalline Ho(OH)3 determined by precise adiabatic calorimetry from 11 to 350 K, the Schottky contribution associated with the Stark splitting of the ground J-manifold (5I8) was ...
Dielectric breakdown characteristics of a high current metal vapor plasma
(Elsevier, 1987)
Time- and spatially-resolved spectroscopy is used to study the early-time spectral features of the plasmas produced by high-current, capacitive discharges through thin silver films. Spectra are compared for several support ...
Thermodynamics of thallium alkanoates II. Heat capacity and thermodynamic functions of thallium(I) n-heptanoate
(Elsevier, 1985-05)
The sub-ambient heat capacity of thallium(I) n-heptanoate is characterized by two sets of transitions between 262 and 301 K. The lowest transition (at 262.8 K) has a maximum Cp, m/R [approximate] 700. Next, a bifurcated ...
A convenient synthesis of substituted [gamma]-pyrones
(Elsevier, 1980)
An efficient and general synthetic method for various 2-mono- and 2,6-disubstituted [gamma]-pyrones has been developed. This utilizes the -acylation (70-85%) of [beta]-methoxy-[alpha],[beta]-enone lithium enolates by acid ...
Supercritical fluid jet expansions of polar aromatic carboxylic acids using simple derivatization with detection by resonant two-photon ionization
(Elsevier, 1988)
In this work simple derivatization is used as a means of enhancing the solubility of polar aromatic carboxylic acids in supercritical CO2 and N2O. The supercritical fluid is then expanded from 200 atm and 40[deg]C through ...
Thermophysics of metal alkanoates III. Heat capacities and thermodynamic properties of lithium and potassium propanoates
(Elsevier, 1984-01)
At 298.15 K, the values of Cp, m/R, Smo/R, {Hmo - Hmo(0)}/R, and {Gmo - Hmo(0)}/RT ar 15.58, 17.13, 2588.6 K, and -8.445 for CH3CH2CO2Li(cr), and 17.30, 21.16, 3134.0 K, and -10.647 for CH3CH2CO2K(cr). The energetics and ...
Thermal resistivity of layered 4He films on ZYX graphite below 2 K
(Elsevier, 1980-04-01)
Thermal resistance and vapor pressure isotherms were taken near superfluid onset for ultra-thin helium films adsorbed on a ZYX graphite wafer between 1-2 K and 3-7 atomic layers. Our data are consistent with previous ...