Now showing items 31-40 of 109
Spectroscopy of 1,4,4-trifluorocyclobutene
(Elsevier, 1990-06)
A new compound, 1,4,4-trifluorocyclobutene (144FCB), has been obtained as a byproduct in the reduction of perfluorocyclobutene with sodium borohydride. A comprehensive spectroscopic study of 144FCB has been undertaken ...
Thermodynamic properties of ammonium haloplatinates I. Heat capacity and thermodynamic functions of ammonium hexachloroplatinate (NH4)2PtCl6 from 6 K to 348 K
(Elsevier, 1990-11)
The heat capacity of ammonium hexachloroplatinate (NH4)2PtCl6 was measured from 6 K to 348 K by adiabatic calorimetry. The heat-capacity curve is sigmate without anomalies. It rises rapidly from T --> 0 to 250 K where ...
The sulfhydryl content of -threonine dehydrogenase from Escherichia coli K-12: relation to catalytic activity and Mn2+ activation
(Elsevier, 1990-01-19)
When oxidized to cysteic acid by performic acid or converted to carboxymethylcysteine by alkylation of the reduced enzyme with iodoacetate, a total of six half-cystine residues/subunit are found in -threonine dehydrogenase ...
Evaluation of menogaril in renal cell carcinoma
(Kluwer Academic Publishers; Springer Science+Business Media, 1990-03)
The Southwest Oncology Group (SWOG) studied the response rate and toxicity of menogaril (200 mg/m 2 i.v. q 28 days) in patients with advanced metastatic renal cell carcinoma. During the early stage of the trial two partial ...
Vibrational studies of the disulfide group in proteins : Part II. Ab initio force fields and normal mode frequencies of dimethyl, methylethyl, and diethyl disulfides
(Elsevier, 1990-07)
The geometric parameters and quadratic force constants of dimethyl disulfide, methylethyl disulfide, and diethyl disulfide in all their stable conformations and transition state conformations have been obtained from ab ...
Comprehensive force field for multiply-chlorinated hydrocarbons
(Elsevier, 1990)
A force field is presented that has been optimized for chlorinated hyrocarbons containing isolated, vicinal, and geminal secondary chlorines. For carbon--chlorine stretch modes, 74 frequencies in 10 molecules are reproduced ...
Adduct formation identification between phenyl glycidyl ether and 2'-deoxyadenosine and thymidine by chromatography, mass spectrometry and nuclear magnetic resonance spectroscopy
(Elsevier, 1990)
Thymidine 2'-deoxyadenosine were reacted with phenyl glycidyl ether in order to study the formation of the corresponding 2'-deoxynucleoside adducts. Separation methods were elaborated using either reversed-phase high-performance ...
2-Amino-3-ketobutyrate CoA ligase of Escherichia coli: stoichiometry of pyridoxal phosphate binding and location of the pyridoxyllysine peptide in the primary structure of the enzyme
(Elsevier, 1990-01-19)
Pure 2-amino-3-ketobutyrate CoA ligase from Escherichia coli, which catalyzes the cleavage/condensation reaction between 2-amino-3-ketobutyrate (the presumed product of the -threonine dehydrogenase-catalyzed reaction) and ...
Determination of flow profiles in porous media using shifts in gamma spectra
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1990-06)
A new technique was developed to determine the tracer location and fluid velocity in porous media nonintrusively. This technique exploits the competitive effects between the photoelectric interaction and the Compton ...
Toughening mechanisms in core-shell rubber modified polycarbonate
(Elsevier, 1990-12)
We have conducted a study of toughening mechanisms in rubber modified polycarbonate systems in order to evaluate the sequence of deformation events which improve fracture toughness. We conclude that cavitation of the rubber ...