Now showing items 541-550 of 554
Low-temperature heat capacities, thermophysical properties, optical spectra, and analysis of Schottky contributions to Pr(OH)3
(Elsevier, 1979-09)
From values of the heat capacity of microcrystalline Pr(OH)3 determined by precise adiabatic calorimetry from 15 to 350 K, the Schottky contribution associated with all but the lowest Stark level was resolved with the aid ...
External, internal and semi-internal vibrations in molecular solids: spectroscopic criteria for identification
(Elsevier, 1973-09-01)
A new method to identify the nature of vibrations in molecular crystals as external or internal is proposed. The criterion is that in isotropic mixed crystals of protonated and corresponding perdeuterated compounds, the ...
Activity and properties of CTP: Cholinephosphate cytidylyltransferase in adult and fetal rat lung
(Elsevier, 1976-08-23)
Cholinephosphate cytidylyltransferase (CTP: cholinephosphate cytidylyltransferase, EC 2.7.7.15) is located in both the microsomal and supernatant fractions of adult lung when the tissue is homogenized in 0.145 M NaCl. The ...
Acyl coenzyme a: 2-acyl-sn-glycerol-3-phosphate acyltransferase activity in rat liver microsomes
(Elsevier, 1971-11-05)
2-Acylglycerol-3-phosphate can be acylated by acyl-CoA in the presence of microsomal preparations from rat liver. With optimal amounts of substrate, the acyltransferase reaction to the 1-position occurred at about one tenth ...
Finite nucleus model for the Fermi contact interaction
(John Wiley & Sons, Inc., 1979-01)
A model for the Fermi contact interaction is proposed in which the charge and magnetic moment of the nucleus are uniformly distributed within a sphere of radius r 0 . This leads to a SchrÖdinger equation, which is solvable ...
Steady-state kinetic analyses of Photosystem II activity catalyzed by lipophilic electron acceptors
(Elsevier, 1979-08-14)
Steady-state kinetic analyses of the Photosystem II activity elicited by quinones and quinonediimines in KCN/Hg-inhibited chloroplasts reveal that: 1. 1. Quinones generate a single reaction in which one quinone competes ...
On the exactness of classical transition state theory for collinear collisions
(Elsevier, 1977-06-15)
We have applied Pechukas and McLafferty's test for the exactness of classical transition state theory (TST) to the collinear subsurface of Porter and Karplus' H3 hypersurface and have determined that TST is exact to at ...
Selective catechol oxidations with diphenyl selenoxide. Applications to phenolic coupling.
(Elsevier, 1979)
Diphenyl selenoxide was used as a mild and selective oxidant in the synthesis of aporphines and homoaporphines. An intramolecular coupling between a phenol and a catechol is believed to proceed catechol selenurane intermediates.
Electron paramagnetic resonance studies on nitrogenase. II. Interaction of adenosine 5'-triphosphate with azoferredoxin
(Elsevier, 1973-02-22)
The interaction of ATP with both iron-sulfur proteins of nitrogenase from Clostridium pasteurianum, azoferredoxin and molybdoferredoxin, has been studied by low-temperature EPR spectroscopy. ATP in the presence of Mg2+ ...