Now showing items 101-110 of 483
Gravity-induced flocculation
(Elsevier, 1984-09)
In polydisperse colloidal systems, flocculation can occur as a result of the differential creaming rates between small and large particles. As an improvement on earlier work, we have rigorously modelled this process of ...
The thermodynamics of ammonium indates II. The molar heat capacity of the ammonium pentabromoindate monohydrate salt (NH4)2InBr5 [middle dot] H2O from 7.8 to 348 K
(Elsevier, 1988-11)
The molar heat capacity of ammonium pentabromoindate monohydrate (NH4)2InBr5 [middle dot] H2O was measured from 7.8 to 348 K using adiabatic calorimetry. The curve of heat capacity as a function of temperature is continous. ...
Preparation of 1-deuterioaldehydes via tub use of diisobutylaluminum deuteride (DIBAL-D)
(Elsevier, 1984)
Deuterioaldehydes, essential precursors In the preparation of chiral primary deuterioalcohols, have been prepared in yields ranging from 55-75% via reduction of methyl and ethyl esters at -78[deg]C with diisobutylaluminun ...
Determination of an empirical energy function for protein conformational analysis by energy embedding
(John Wiley & Sons, Inc., 1987-10)
It is quite easy to propose an empirical potential for conformational analysis such that given crystal structures lie near local minima. What is much more difficult, is to devise a function such that the native structure ...
Synthesis of fused pyrrolines by the intramolecular cycloadition of azides application to the pyrrolizidine alkaloids.
(Elsevier, 1985)
Intramolecular 1,3-dipolar cycloaddition of azide 4 proceeds through triazoline 5 and vinyl aziridine 6, resulting in the formation of the 1,5-homodienyl shift product 7 and the tetrahydropyrrolizines 8 and 9. Compound 8 ...
Fluorescence yield near edge spectroscopy of [pi]-bonded CO on Fe(100)
(Elsevier, 1989-12-03)
Near edge X-ray absorption fine structure (NEXAFS) spectra of CO adsorbed on the Fe(100) surface are reported. Spectra, obtained by fluorescence yield (FYNES), are presented for each of the four individual CO adsorption ...
Iron and manganese superoxide dismutases
(Elsevier, 1983)
Fe and Mn SDs are enigmatic metalloproteins for several reasons: They are found in strict anaerobes as well as aerobes. In some cases the Fe and Mn ions appear to be interchangeable while in others they are not. In some ...
A Mild Oxidation of 1.1 - Diorganometallics to Ketones and Aldehydes. A New Stereoselective Aunroach to Aldol products - Part 1
(Elsevier, 1988)
The 1,1-diorganometallics of magnesium and zinc 1 are converted by the reaction with Me3SnCl to the 1,1-diorganometallics of tin and zinc 2 which are readily oxidized by dry air at -10[deg] to 0[deg]C to afford the ...
Laser optogalvanic spectroscopy of molecules: The red electronic system of titanium oxide (TiO)
(Elsevier, 1985-02-08)
The laser optogalvanic (LOG) spectrum of the (0,0) bands of the B 3[Pi] 3[Delta] transition of titanium oxide (TiO) has been observed. The TiO molecules were generated in a glow discharge by sputtering titanium metal and ...
Similarities between stratum corneum basic protein and histidine-rich protein II from newborn rat epidermis
(Elsevier, 1981-03-27)
The stratum corneum basic protein and histidine-rich protein II were each isolated from newborn rat epidermis and compared by biochemical and immunologic methods. The proteins were indistinguishable by immunodiffusion using ...