Now showing items 541-550 of 584
Biphasic kinetic plots and specific analogs distinguishing and describing amino acid transport sites in S37 ascites tumor cells
(Elsevier, 1975-06-25)
Curve-fitting procedures indicated that exo-2-amino-bicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH) modified V and Km for one of two systems serving for histidine transport into the S37 ascites tumor cells. When this system ...
A complete general valence force field for secondary chlorides
(Elsevier, 1973-12)
A general valence force field for secondary chlorides has been refined which includes torsional force constants based on assignments of low frequency modes in model compounds. This force field also incorporates force ...
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 ...
Assignment of torsion and low frequency bending vibrations of secondary chlorides
(Elsevier, 1973-10)
Far infrared and Raman spectra of 2-chloropropane, 2-chlorobutane and dl- and meso-2,4-dichloropentane have been analyzed in order to assign the torsional force constants in the valence force field for secondary chlorides. ...
Error matrices in gas-electron diffraction : II. Influence of weight matrix
(Elsevier, 1973-08)
The properties of three different forms of error matrices in electron diffraction are investigated, assuming the presence of stationary, Gaussian, Markovian noise in the primary data. The error matrices studied are Mxp ...
Thermodynamics of the monohydrogen difluorides VI. Heat capacities of RbHF2 and CsHF2 from 300 to 530 K, transitions and melting
(Elsevier, 1978-09)
The heat capacities of RbHF2 and CsHF2 were determined from 5 to 533 K, and hence into the molten-salt region by adiabatic calorimetry. The thermodynamics of the transitions were determined. The entropy of transition ...
Short chain ceramides as substrates for glucocerebroside synthetase. Differences between liver and brain enzymes
(Elsevier, 1979-04-27)
In order to increase the sensitivity of the assay for ceramide: UDPGlc glucosyltransferase, the enzyme that makes glucocerebroside, we synthesized a variety of ceramide homologues that might be better substrates than the ...
Synthesis and properties of 35S, 14C and 3H labeled S-alkyl glycerol ethers and derivatives
(Elsevier, 1976-07)
Radioactive S-alkyl glycerol ethers have been synthesized with 35S, 14C and 3H labels as well as 3H/35S double labels.The synthesized compounds were converted to various derivatives which can serve to characterize the ...
Equilibrium dialysis and carbohydrate-binding studies on the 2-acetamido-2-deoxy--glucopyranosyl-binding lectin from Bandeiraea simplicifolia seeds
(Elsevier, 1978-03)
The carbohydrate-binding specificity of Bandeiraea simplicifolia lectin II (BS II lectin) has been studied by quantitative precipitin and hapten-inhibition analysis. The BS II lectin precipitated biopolymers having nonreducing ...
Enzyme changes associated with mitochondrial malic enzyme deficiency in mice
(Elsevier, 1979-10-18)
A genetically determined absence of mitochondrial malic enzyme (EC 1.1.1.40) in c3H/c6H mice is accompanied by a four-fold increase in liver glucose-6-phosphate dehydrogenase and a two-fold increase for 6-phosphogluconate ...