Now showing items 31-40 of 74
Calculated molecular structures and electronic spectra of the geometric isomers of a model carotenoid molecule, 6,11-dimethylhexadecaheptaene
(Elsevier, 1981)
The molecular structures and the electronic spectra of the geometric isomers of a model carotenoid polyene, 6,11-dimethylhexadecaheptaene, were calculated. It was concluded that solvent effects and conformational isomerization ...
Emulsion stability: Delineation of different particle loss mechanisms
(Elsevier, 1981-01)
The kinetics of the emulsion-breaking process are governed by three different particle loss mechanisms: Brownian flocculation, sedimentation flocculation, and creaming. Various particle loss mechanisms have been delineated ...
Spectrophotometric investigation of products formed following the initial one-electron electrochemical reduction of nicotinamide adenine dinucleotide (NAD+)
(Elsevier, 1981-12-04)
On electrolysis of NAD+ in aqueous solution at a potential corresponding to the initial one-electron reduction of NAD+ to a free radical, a greenish-yellow color appears which fades when electrolysis is complete. Literature ...
Universality and critical exponents of energy transport in binary crystals: 3B2u naphthalene
(Elsevier, 1981-01-01)
Exciton migration experiments on isotopically mixed naphthalene crystals reveal a universal behavior with reduced donor concentration, irrespective of temperature, acceptor species or acceptor concentration, giving a very ...
Crystal and molecular structure of analgesics, I. Ciramadol hydrobromide, C 15 H 23 O 2 N · HBr
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1981-08)
Increased calmodulin in cultured skin fibroblasts from patients with cystic fibrosis
(Elsevier, 1981-12)
We have found that the content of an endogenous calcium-binding protein, calmodulin, is greater in cystic fibrosis fibroblasts than in normal cells. Homogenate preparations from CF fibroblasts contained 2.4 +/- 0.2 ng ...
Dissolution kinetics: Catalysis by strong acids
(Elsevier, 1981-07)
The dissolution of silicate minerals in mixtures of hydrofluoric acid and strong acids such as HCl is catalyzed by H+ ions adsorbed at the mineral surface. Studies of the catalyzed dissolution of kaolinite, quartz, potassium ...
Potent induction of rat liver microsomal, drug-metabolizing enzymes by 2,3,3',4,4',5-hexabromobiphenyl, a component of fireMaster
(Elsevier, 1981-04)
The multistep synthesis and purification of 2,3,3',4,4',5-hexabromobiphenyl (HBBp) is described. Capillary gas chromatography revealed that HBBp comprises 0.05% of the industrial polybrominated biphenyl (PBB) mixture, ...
Phenoxazinone synthase from Streptomyces antibioticus: Purification of the large and small enzyme forms
(Elsevier, 1981-10-01)
Phenoxazinone synthase has been purified approximately 80-fold from 48-h-old cells of Streptomyces antibioticus. The purification procedure involves streptomycin sulfate and ammonium sulfate precipitations, affinity and ...
Concentration dependence of diffusion coefficient at various molecular weights and temperatures
(Elsevier, 1981-09)
The effect of temperature on the concentration dependence of the diffusion coefficient D(c) is investigated experimentally by light scattering using polystyrene with Mw = 179 000 and 900 000 in toluene and cyclohexane at ...