Now showing items 31-40 of 62
Small ring metallocycles : V. Crystal and molecular structure of hydrido-1,3-(1,1,3,3-tetramethyldisiloxanediyl)carbonylbis(triphenylphosphine)iridium(III), Me2SiOSiMe2Ir(H)(CO)(PPh3)2 [middle dot] EtOH
(Elsevier, 1979-01-16)
The structure of the cyclo-metalladisiloxane, Me2SiOSiMe2Ir(H)(CO)(PPh3)2, has been determined by single crystal X-ray diffraction using Mo-K[alpha] radiation. Data were collected to 20 = 45 [deg] giving 6060 unique ...
Instrumental improvements for rapid, detailed kinetic studies of oxygenase activity
(Elsevier, 1979-07-15)
The characteristics of an electronic differentiator that facilitates continuous monitoring of changes in the oxygen concentration measured by a polarographic oxygen electrode are described. In addition, some properties of ...
A specific, sensitive method for the determination of hyaluronate
(Elsevier, 1979-07-15)
A sensitive and specific assay for hyaluronate was devised. Hyaluronate contained in biological mixtures was digested with a commercially available microbial hyaluronate lyase. The [beta]-[Delta]4,5-eneglucopyranuronic ...
Comparative study of two highly purified forms of liver microsomal cytochrome P-450: Circular dichroism and other properties
(Elsevier, 1979-06)
The two major forms of rabbit liver microsomal cytochrome P-450, P-450LM2 and P-450LM4, which were previously shown to differ in their absorption spectra, electrophoretic and immunochemical properties, and substrate ...
Nuclear protein kinase activities during the cell cycle of HeLa S3 cells
(Elsevier, 1979-12-17)
To ascertain the activity and substrate specificity of nuclear protein kinases during various stages of the cell cycle of HeLa S3 cells, a nuclear phosphoprotein-enriched sample was extracted from synchronised cells and ...
Gas chromatography-mass spectrometric characteristics and assay of tele-methylhistamine
(Elsevier, 1979-07-01)
To date, tele-methylhistamine, the product of enzymatic histamine methylation, has not been measured by a suitable method. Tele- and pros-methylhistamine both react quantitatively with trifluoroacetic and heptafluorobutyric ...
Inhibition of prostaglandin biosynthesis by eicosapentaenoic acid
(Elsevier, 1979-11)
Eicosapentaenoic acid [20:5(n-3)] is not oxidized by the purified cyclooxygenase from sheep vesicular glands in the conditions of low peroxide tone in which arachidonate [20:4(n-6)] is rapidly oxygenated. When the level ...
Supported Au---Pt catalysts : Characterization and hydrogen transfer activity between benzene and cyclohexane
(Elsevier, 1979-04)
Two series of Au---Pt catalysts supported on SiO2 were prepared by the incipient wetness method. In one series the total amount of metal (Au + Pt) was kept constant at about 0.7 wt% (Series A), while in a second series the ...
Nuclear magnetic resonance study of the molecular structure of 4-methylarsabenzene and 4-methylstibabenzene partially oriented in a nematic solvent
(Elsevier, 1979)
The molecular structure of 4-methylarsabenzene (I) and 4-methylstibabenzene (II) partially oriented in a nematic solvent is studied by NMR. Good agreement between the ring proton structure of I and that of arsabenzene from ...