Now showing items 51-60 of 108
Dual enzyme labels for simultaneous heterogeneous enzyme-linked competitive binding assays
(Elsevier, 1994-11-20)
The use of two enzyme labels in a dual analyte simultaneous heterogeneous enzyme-linked competitive binding assay is examined. Reaction conditions for monitoring glucose-6-phosphate dehydrogenase (G6PDH) and [beta]-galactosidase ...
Direct chemical analysis of UV laser ablation products of organic polymers by using selective ion monitoring mode in gas chromatography/mass spectrometry
(Elsevier, 1994-02)
Trace quantitites of laser ablated organic polymers were analyzed by using commercial capillary column gas chromatography / mass spectrometry; the instrument was modified so that the laser ablation products could be ...
Compositional and geometrical isomers of 15-metallacrowns-5 complexes
(Elsevier, 1994-05)
Two mixed valent, hexanuclear manganese clusters of general composition Mn(acetate)2[Mn(III)(salicylhydroximate)]5(pyridine)6, Mn(II)(OAc)2(15-MCMn3+N-5) have been prepared in [approximate] 70% yield. Structural characterization ...
Generation and cycloaddition of heteroatom-substituted 2-azaallyl anions with alkenes and alkynes. Synthesis of 1-pyrrolines and pyrroles
(Elsevier, 1994-04-25)
Imidates and thioimidates 1 bearing an N-(1-tri-n-butylstannyl)alkyl group (e.g., 7-9) were transmetalated with n-BuLi to generate heteroatom-substituted 2-azaallyl anions 2. These anions underwent [2[pi]s+4[pi]s] ...
Phase stability and structural properties of Ni7 +/- [delta]S6 and Ni9S8 Heat capacity and thermodynamic properties of Ni7S6 at temperatures from 5 K to 970 K and of Ni9S8 from 5 K to 673 K
(Elsevier, 1994-09)
Two stable solid phases with composition in the range from (45 to 48) moles per cent of S exist for (nickel + sulfur): Ni9S8 which disproportionates to Ni1 - [delta]S and Ni7 +/- [delta]S6 above T = (709 +/- 5) K, and Ni7 ...
Regulation of CTP: Phosphocholine cytidylyltransferase in HepG2 cells: Effect of choline depletion on phosphorylation, translocation and phosphatidylcholine levels
(Elsevier, 1994-01-20)
We studied the effect of choline depletion on the biosynthesis of phosphatidylcholine (PC) and the distribution and phosphorylation of cytidylyltransferase (CT) in HepG2 cells. Phosphocholine concentrations decreased within ...
Intermolecular 1,3-dipolar cycloadditions of muchnones with acetylenic dipolarophiles: Sorting out the regioselectivity
(Elsevier, 1994-04-03)
A series of 1,3-dipolar cycloadditions of munchnones with acetylenic dipolarophiles was studied, wherein factors related to regioselectivity were investigated. The results from munchnones with electronically divergent ...
Photoperiodic effects on hypothalamic [beta]-endorphin and POMC mRNA
(Elsevier, 1994-11-10)