Now showing items 271-280 of 293
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. ...
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 ...
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 ...
Rat liver membrane preparations
(Elsevier, 1972-09)
The quality of rat liver plasma membranes was examined using three different methods of preparation. Hypotonic Ca++-free preparation media were compared with hypotonic Ca++ media and with isotonic Ca++ media. The plasma ...
Vibrational spectra in the C---H stretching region and the structure of the polymethylene chain
(Elsevier, 1978)
The C---H stretching regions of both the Raman and i.r. spectra of the extended polymethylene chain have broad secondary maxima. In the case of the Raman spectrum, line shapes are dependent on the environment of the chain, ...
Heat capacity and thermodynamic properties of FeSb2 from 5 to 1021.2 K Enthalpy of decomposition
(Elsevier, 1977-08)
The heat capacity of FeSb2 has been measured by adiabatic-shield calorimetry from 5 to 1021.2 K. At the latter temperature the phase decomposes into the FeSb phase and an antimony-rich melt. The heat capacity increases ...
Evidence for two sites of inhibition of photosynthetic electron transport by dibromothymoquinone
(Elsevier, 1978-08)
Two sites in the photosynthetic electron transport chain of spinach chloroplasts are sensitive to inhibition by the plastoquinone antagonist dibromothymoquinone (2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone). This ...