Now showing items 41-50 of 52
Alkyl transfer steps in the catalytic alkylation of benzene, toluene, and cyclohexane
(Elsevier, 1972-02)
The rate of the catalytic redistribution of isotopic carbon in binary mixtures of benzene and toluene, benzene and ethylbenzene, toluene and xylene, toluene and ethylbenzene, cyclohexane and methylcyclohexane was investigated ...
Further chemical modification studies on concanavalin A, the carbohydrate binding protein of the jack bean
(Elsevier, 1972-07-21)
Acetylation of concanavalin A with N-acetyl imidazole (30 molar excess of N-acetyl imidazole) demonstrated that "accessible" tyrosyl residues must not be directly involved in the binding of carbohydrates. More extensive ...
Tris(hydroxymethyl)aminomethane. Heat capacities and thermodynamic properties from 5 to 350 K
(Elsevier, 1972-05)
Heat capacities of crystalline or , (HOCH2)3CNH2, were measured from 5 to 350 K by adiabatic calorimetry. No thermal anomalies were found in this region. The observed heat capacities yield for Cp(298.15 K), So(298.15 ...
Extractability of lysozyme from bovine nasal cartilage
(Elsevier, 1972-10-12)
Lysozyme (mucopeptide N-acetylmuramylhydrolase, EC 3.2.1.17) is present in the extracellular matrix of bovine nasal cartilage at a concentration of about 0.03 to 0.08 mg per g wet tissue (3-8 mg/100 ml per g). It is extracted ...
Model transport studies utilizing lecithin spherules : I. Critical evaluations of several physical models in the determination of the permeability coefficient for glucose
(Elsevier, 1972-05-09)
1. 1. For the purpose of quantifying the transport of drugs across phospholipid membranes in complex aqueous liposome dispersions, solute release experiments were conducted with different initial boundary conditions so ...
Epimerization of trans-4-hydroxy--proline to cis-4-hydroxy--proline during acid hydrolysis of collagen
(Elsevier, 1972-10)
1. 1. trans-4-Hydroxy--proline is epimerized to cis-4-hydroxy--proline under the conditions generally used for the hydrolysis of proteins for analyses of amino acids.2. 2. The cis epimer elutes from a column of UR-30 resin ...
Synthesis of some functional germanium heterocycles: Germirenes and derivatives of germacyclopentene
(Elsevier, 1972-07-16)
The germirene, 1,1,4,4-tetraiodo-2,3,5,6-tetramethyl-1,4-digerma-2,5-cyclohexadiene, (VI), was prepared from germanium diiodide and 2-butyne. Reduction with lithium aluminum hydride replaces the iodine with hydrogen. The ...