Now showing items 41-50 of 293
Trimethylstannyl-2,4-cycloheptadiene: A fluxional molecule
(Elsevier, 1972-05-16)
Trimethylstannyl-2,4-cycloheptadiene (II) was synthesized and shown to be fluxional on the NMR time scale. The activation energy for the [1,5] trimethyltin migration is estimated to be ca. 18 kcal/mole. This value is ...
Thermodynamics of Fe(II)Fe(III) oxide systems II. Zinc- and cadmium-doped Fe3O4 and crystalline magnetite
(Elsevier, 1976-06)
Four doped samples of composition MzFe3 - xO4, in which for M = cadmium, x = 0.005 and 0.010, and for M = zinc, x = 0.005 and 0.066, were prepared using a high-temperature solid-state ceramic technique. X-ray, magneto-t.g.a., ...
Electrophilic alkylation of 1-SB9H9
(Elsevier, 1977-06-21)
Reaction of closo-1-SB9H9 with either ethyl or methyl iodide in the presence of A1C13 produces alkylated derivatives of the type 1-SB9H(9-x)Rx (R = C2H5, CH3;x = 1---5), which were identified by GC/MS, 11B and 1H NMR ...
The purification and properties of an alcohol dehydrogenase from mouse liver
(Elsevier, 1974-04)
1. 1. An alcohol dehydrogenase (alcohol: NAD oxidoreductase, EC ( [middle dot] [middle dot] ) was isolated from the supernatant fraction of mouse liver and purified 206-fold.2. 2. A number of aliphatic aldehydes, ranging ...
Determination of anserine, carnosine, and other histidine compounds in muscle extractives
(Elsevier, 1971-01)
A method for the determination of anserine, carnosine, homocarnosine, histidine, 1-methylhistidine, and 3-methylhistidine with the Phoenix amino acid analyzer is described. A study of the separation of these compounds on ...
The enthalpies of combustion and formation of [2.2]-paracyclophane and triptycene
(Elsevier, 1973-09)
The enthalpies of combustion, ΔHoc, for crystalline [2.2]-paracyclophane (C16H16) and triptycene (C20H14) have been measured by oxygen combustion calorimetry. The derived standard enthalpies of formation at 298.15 ...
Nephrotoxic effects of tetanus toxin: An ultrastructural study
(Elsevier, 1975-12)
Generalized nephrotoxicity was observed in the rat as early as 6 hr after intramuscular injection of 1000 of tetanus toxin. The most striking morphological changes, including swelling and rupture of the mitochondria, ...
2-acetamido-2-deoxy-[alpha]-D-galactosidases of clostridium perfringens. separation and characterization of an exoglycosidase and an oligosaccharidase
(Elsevier, 1978-03)
Two distinct 2-acetamido-2-deoxy-[alpha]-D-galactosidases have been separated from filtrates of cultured Clostridium perfringens by electrophoresis in 6.5% poly(acryl-amide) gels. One of the enzymes had a mobility of ...
2-acetamido-2-deoxy-[alpha]--galactosidases of clostridium perfringens. Separation and characterization of an exoglycosidase and an oligosaccharidase
(Elsevier, 1978-03)
Two distinct 2-acetamido-2-deoxy-[alpha]--galactosidases have been separated from filtrates of cultured Clostridium perfringens by electrophoresis in 6.5 % poly(acryl-amide)gels. One of the enzymes had a mobility of 0.32-0.36 ...