Now showing items 31-40 of 76
The reactivity of the highly functionalized copper, zinc reagents RCu(CN)ZnI toward 1-haloalkynes and acetylenic esters
(Elsevier, 1989)
The highly functionalized organometallics RCu(CN)ZnI 1 react efficiently with 1-haloalkynes providing polyfunctionalized alkynes in high yields. This method has been used to prepare a pheromone of the Amathes c-nigrum in ...
Replacement ion chromatography with potentiometric detection using a potassium-selective membrane electrode
(Elsevier, 1989)
The use of a simple potassium-selective membrane electrode as a detector in replacement ion chromatography of both cations and anions is examined. For cation chromatography, separated alkali metal ions are detected in the ...
Ab initio force fields of alanine dipeptide in C5 and C7 conformations
(Elsevier, 1989-06)
We have followed up our previous ab initio calculations of the force fields and dipole-moment derivatives of glycine dipeptide in C5 and C7 conformations with similar studies of the -alanyl compound [CH3CONHCH(CH3)CONHCH3]. ...
A molecular mechanics (MM2) study of Furan, Thiophene, and related compounds
(John Wiley & Sons, Inc., 1989-07)
The molecular mechanics calculations reported earlier for nitrogen heterocycles have now been extended to include the title compounds, and related molecules. It is in general possible to calculate these structures with an ...
Vibrational analysis of crystalline triglycine
(Elsevier, 1989-12-01)
We have refined vibrational force fields for polypeptides that permit excellent reproduction of the normal mode frequencies of such molecules. This is demonstrated in the present study, in which 80 IR and Raman bands of ...
Viscosity measurements of low temperature molten salts
(Kluwer Academic Publishers; Chapman and Hall Ltd. ; Springer Science+Business Media, 1989-03)
Synthesis of 1,3-diphenyltriazenide complexes of aluminium, gallium and indium: Crystal structure of tris(1,3-diphenyltriazenido)aluminium(III)
(Elsevier, 1989)
The reaction of AlMe3 with 1,3-diphenyltriazene [Hdpt] in toluene gives Al(dpt)3, even when AlMe3 is in large excess. The monomeric structure has been established by X-ray diffraction. Crystals of Al(dpt)3 are monoclinic, ...
Voronoi binding site models: Calculation of binding modes and influence of drug binding data accuracy
(John Wiley & Sons, Inc., 1989-07)
A new and accurate method for calculating the geometrically allowed modes of binding of a ligand molecule to a Voronoi site model is reported. It is shown that the feasibility of the binding of a group of atoms to a Voronoi ...
Human platelets mediate iron release from transferrin by adenine nucleotide-dependent and -independent mechanisms
(Elsevier, 1989-01-30)
We assessed the ability of platelet sonicates and mediators secreted by unstimulated and thrombin-stimulated platelets to facilitate the release of iron from transferrin. Platelet sonicates and platelet conditioned media ...
Vibrational force field and normal mode analysis of N,N-dimethylacetamide
(Elsevier, 1989)
A simple general valence force field has been refined for N,N-dimethylacetamide which includes both in-plane and out-of-plane modes. This force field gives good agreement between observed and calculated frequencies for ...