Now showing items 21-30 of 140
The microwave spectrum and structure of trimethylamine-monofluoroborane
(Elsevier, 1978)
The microwave spectra of the 11B14N, 11B15N, 10B14N and 10B15N species of trimethyl-amine-monofluoroborane have been assigned in order to evaluate the B--N distance. Analysis of the rotational constants using either the ...
Composition of the aqueous phase of chromaffin granules
(Elsevier, 1979-09-20)
Nuclear magnetic resonance spectroscopy has been used to determine the composition of the aqueous phase of bovine chromaffin granules. Relative concentrations of catecholamines (epinephrine plus norepinephrine), ATP and ...
Identification of the thiol residues involved in modifications of pig heart lipoamide dehydrogenase by cupric ion and by iodoacetamide
(Elsevier, 1974-11-25)
The thiol residues involved in two previously described modifications of heart lipoamide dehydrogenase (NADH:lipoamide oxidoreductase, EC 1.6.4.3) have been identified by comparison of peptide maps of unmodified and modified ...
Structures of the strained molecules hexamethylethane and 1,1,2,2-tetramethylethane by gas-phase electron diffraction
(Elsevier, 1976-06)
Hexamethylethane has bond lengths of rg(C-C central) = 1.582 +/- 0.01 A, rg (C-C terminal) = 1.542 +/- 0.002 A, rg (C-H) = 1.113 +/- 0.004 A, and bond angles of [angle]CcCcCt = 111.0 +/- 0.3[deg] and [angle]CCH = 111.5 +/- ...
Long range exciton percolation and superexchange: Energy denominator study on 3B1u naphthalene
(Elsevier, 1977-02-01)
The long-range exciton percolation model is found to describe the lowest triplet exciton superexchange ("tunneling") migration at low temperature (2 K), in our model alloy system: Binary isotopic mixed naphthalene crystals ...
Exciton percolation kinetics and exciton coherency: 1B2u naphthalene
(Elsevier, 1979-02-01)
The time evolution of the fluorescence from a naphthalene "guest" and a betamethylnaphthalene "sensor" in a C10D8 "host" was measured at 1.8 and 4.2 K. A rigorous heterogeneous kinetic model is used to fit the data, based ...
Field dependence of nuclear magnetic relaxation of 207Pb in aqueous Pb(ClO4)2
(The American Institute of Physics, 1974-02-15)
Nuclear magnetic relaxation times of the 207Pb resonance have been measured as a function of temperature and concentration at field strengths of 16.9, 11.7, and 6.56 kG in aqueous Pb(ClO4)2. Longitudinal relaxation is ...
On the utility of an in-core fast neutron generator
(Elsevier, 1978-11-01)
An examination of the flux magnitudes reported for a LiOD-D2O converter (thermal to 14 MeV neutrons) indicates that such a device offers little if any advantage over fission spectrum neutrons.
Method of Heavily Doped Isotopic Mixed Crystal for Determination of Exciton Splittings and Normal Modes: Raman Spectra of Naphthalene
(The American Institute of Physics, 1972-07-15)
Recent developments on concentrated mixed crystal exciton spectra enabled us to develop new qualitative and quantitative criteria for the identification of vibrational exciton splittings: Observation of an appropriately ...
Variable range cluster model of exciton migration: Dimensionality and critical exponents for naphthalene
(Elsevier, 1979-01)
Relative luminescence intensities for randomly substituted ternary systems with two major components and a minor one (sensor), for four triplet and one singlet exciton systems, identify the maximal effective exciton ...