Now showing items 31-40 of 53
Vibrational analysis of peptides, polypeptides, and proteins. VI. Assignment of Β-turn modes in insulin and other proteins
(Wiley Subscription Services, Inc., A Wiley Company, 1980-01)
The normal modes have been calculated for structures having the dihedral angles of the four Β-turns of insulin. Frequencies are predicted in the amide I region near 1652 and 1680 cm −1 . The former overlaps the Α-helix ...
A new high-pressure recycle-flow calorimeter and results of determinations with ethane
(Elsevier, 1980-02)
A new recycle-flow calorimeter is described with which the thermodynamic properties of fluids can be determined between pressures of 2 to 20 MPa and temperatures of 90 to 400 K. Precise control of both flowrate and pressure ...
On collisionally enhanced laser pumping of supersonic jets of SF6
(Elsevier, 1980-12-01)
Electron-diffraction analyses of SF6 molecules in a microjet irradiated by a cw infrared laser are reported. Excitations of several photons per molecule are achieved in the collisional region extending for the order of a ...
Bimetallic ruthenium-gold-on-magnesia catalysts: Chemicophysical properties and catalytic activity
(Elsevier, 1980-08)
Bimetallic Ru-Au catalysts supported on MgO were prepared, their atomic composition varying from 100% Ru to 100% Au. Samples were characterized after impregnation and drying at 110 [deg]C and after further reduction by ...
Relativistically parametrized extended-HÜckel calculations. II. Orbital energies of group-IV tetrahalides and tetramethyls
(John Wiley & Sons, Inc., 1980-08)
Relativistically parametrized extended-HÜckel ( REX ) calculations are reported for MX 4 (M = Ti, Zr, Hf, C, Si, Ge, Sn, Pb; X = Cl, Br, I) and for M(CH 3 ) 4 (M = Ti, C, Si, Ge, Sn, Pb). Satisfactory agreement is obtained ...
Analysis of interactions among purified components of the liver microsomal cytochrome P-450-containing monooxygenase system by second derivative spectroscopy
(Elsevier, 1980-11-20)
Second derivative spectroscopy together with the respective difference spectroscopy offers an effective methodical tool to resolve overlapping bands and shoulders into distinct bands at eliminated background absorption. ...
A transient current monitoring and electrode characterization system for a pulsed oxygen electrode
(Elsevier, 1980-05-01)
Non-steady state voltammetry has been applied to membrane electrodes to provide improved sensitivity as well as independence of stirring. This paper describes a new instrumentation system based on complementary metal ...
Cyclopropane hydrogenation on Ru and Ru---Au catalysts
(Elsevier, 1980-01)
The rate of reaction between cyclopropane and hydrogen was measured in a flow system on unsupported Ru, Ru/SiO2, andRu/MgO. The effect of the addition of Au to Ru/MgO was also investigated. The temperature was in the range ...
Isotopic oxygen exchange on supported Ru and Au catalysts
(Elsevier, 1980-06)
The isotopic exchange reaction of molecular oxygen is applied to supported ruthenium and gold catalysts. The results on supported ruthenium are similar to those on RuO2. The exchange reaction seems to be unaffected by ...
Cyclic photophosphorylation reactions catalyzed by ferredoxin, methyl viologen and anthraquinone sulfonate. Use of photochemical reactions to optimize redox poising
(Elsevier, 1980-03-07)
The flavin analogue 5-deazariboflavin is a convenient catalyst for the photoreduction of low-potential redox compounds. In an anaerobic medium with Tricine buffer as the electron donor, 5-deazariboflavin is capable of ...