Now showing items 61-70 of 640
Exciton transport in naphthalene alloys: A transition from percolation to diffusion
(Elsevier, 1982-12-03)
Steady-state singlet excitation transport in ternary naphthalene crystals (C10H8/C10D8/[beta]-methylnaphthalene) fits diffusion models at 4.2 K, but not at 1.8 K, where it fits a percolation model.
Tacticity determination of poly(methyl methacrylate) (PMMA) by high-resolution NMR
(John Wiley & Sons, Inc., 1982-10)
No Abstract.
Emulsion stability: Determination from turbidity
(Elsevier, 1981-01)
A novel technique for studying the stability of emulsions has been developed. Owing to the fact that emulsion turbidity is a function of particle concentration and size, the stability of emulsions can be determined by ...
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 ...
Mechanism of cholesterol gallstone dissolution. II. Correlation between the effect of the alkyl amines as cholesterol gallstone dissolution rate accelerators and the degree of binding of the alkyl amines to the bile acid micelles
(Elsevier, 1980-03)
Recent studies have shown that cholesterol monohydrate pellet dissolution rates in real and synthetic bile systems are enhanced dramatically in the presence of small concentrations of amines, quaternary ammonium compounds, ...
A stochastic theory of grain growth
(Elsevier, 1987-07)
A stochastic theory of normal grain growth is proposed. The model is based on the concept that the migration of kinks and ledges should cause a Brownian motion of the grain boundary. This motion results in a drift of the ...
Dynamics of growth of silica particles from ammonia-catalyzed hydrolysis of tetra-ethyl-orthosilicate
(Elsevier, 1988-07)
The NH3-catalyzed formation of colloidal silica particles from tetra-ethyl-orthosilicate (TEOS) in methanol and ethanol is studied by means of light scattering and Raman spectroscopy. We find that the growth is characterized ...
Strain and temperature accelerated relaxation in polycarbonate
(John Wiley & Sons, Inc., 1988-11)
The nonlinear viscoelastic behavior of glassy polymers and its relationship to ductile yielding is studied by single- and double-step stress relaxation experiments. In the latter case a small stress relaxation step is ...