Now showing items 2891-2900 of 2904
Naltrexone reduces ethanol- and sucrose-reinforced responding in rhesus monkeys
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-09)
These experiments evaluated the ability of naltrexone (NTX) to reduce selectively oral and IV ethanol-reinforced responding, and examined the ethanol-NTX interaction in terms of the competitive opioid antagonist property ...
Direct expression of active spinach glycolate oxidase in Escherichia coli
(Elsevier, 1992-08-17)
Spinach glycolate oxidase (GAO) was expressed in Escherichia coli using the T7 RNA polymerase promotor. The enzyme accounts for approx. 1% of the soluble protein fraction and is expressed as a soluble and active enzyme. ...
13C/12C exchange between calcite and graphite: A possible thermometer in Grenville marbles
(Elsevier, 1981-03)
The fractionation of 13C between calcite and graphite, [Delta](Cc-Gr). is consistently small (2.6-4.8 permil) in 34 assemblages from upper amphibolite- and granulite-facies marbles of the Grenville Province. In 25 samples ...
Modern NMR spectroscopy of proteins and peptides in solution and its relevance to drug design
(Kluwer Academic Publishers; ESCOM Science Publishers B.V. ; Springer Science+Business Media, 1993-12)
The knowledge of the three-dimensional (3D) structures and conformational dynamics of proteins and peptides is important for the understanding of biochemical and genetic data derived for these molecules. This understanding ...
The rhodium, silver and indium content of some chondritic meteorites
(Elsevier, 1960-01)
By neutron activation analysis the rhodium, silver and indium content of five chondritic meteorites has been determined. The average data are 0.186 and 0.094 p.p.m. for rhodium and silver. The upper limit for the indium ...
Vibrational spectra, assignments and normal coordinate analyses for crystalline zirconium tetrachloride and tetrabromide
(Elsevier, 1981)
Raman and far-IR spectra have been obtained of crystalline ZrCl4 and ZrBr4. The observed frequencies have been interpreted on the basis of the C2h symmetry of the Bravais unit cell and have been subjected to a normal ...
Increased sensitivity of adenylate cyclase activity in the striatum of the rat to calmodulin and GppNHp after chronic treatment with haloperidol
(Elsevier, 1986-06)
Chronic treatment of rats with haloperidol causes behavioral supersensitivity to dopaminergic agonists and an increase in the sensitivity of adenylate cyclase activity in the striatum to stimulation by dopamine. In this ...
Is cytochrome aa3 from thermus thermophilus a single subunit oxidase?
(Elsevier, 1983)
A reliable procedure has been developed for the purification of the cytochrome c1aa3 complex from the plasma membrane of T. thermophilus. The ratios heme C:heme A:Fe:C were found to be 1:2:3:2 confirming previous results, ...
The toughening of polyamide-6 by brominated poly(isobutylene-co-p-methylstyrene): fracture and toughening mechanisms
(Elsevier, 1993-11)
A study on the toughening of polyamide-6 (PA-6) with a new elastomeric modifier, brominated poly(isobutylene-co-p-methylstyrene) (BrXP-50), was conducted. Morphological analyses and mechanical tests were combined to evaluate ...
The determinants of divalent/monovalent selectivity in anion exchangers
(Elsevier, 1983-04)
This research demonstrates that it is the distance of fixed-charge separation in the resin which is the primary determinant of divalent/monovalent selectivity. Anion resins, particularly acrylics and epoxies, with closely ...