Zobrazeno 1 - 10
of 68
pro vyhledávání: '"Henry Zeldes"'
Autor:
Henry Zeldes, Ralph Livingston
Publikováno v:
Journal of Magnetic Resonance (1969). 26:103-108
An electron spin resonance study of substituted 1-hydropyridinyl radicals produced by the photolytic reduction of nicotinic acid, nicotinamide, and methyl nicotinate in solutions near room temperature is reported. Spectra were analysed for the radica
Autor:
Ralph Livingston, Henry Zeldes
Publikováno v:
Fuel. 61:1254-1259
The equilibrium constant for the dissociation of bibenzyl to form benzyl radicals has been measured in dilute solutions of bibenzyl in toluene at 605°C and at 20.7 MPa (200 atm) and 13.8 MPa (133 atm) using electron spin resonance to assay the conce
Publikováno v:
Journal of Magnetic Resonance (1969). 21:9-16
An electron spin resonance study of radicals present during the photolytic reduction of anions of pyridinecarboxylic acids in solutions near room temperature is reported. Spectra were analyzed for 1-hydropyridine radicals substituted by the carboxyla
Autor:
Ralph Livingston, Henry Zeldes
Publikováno v:
Journal of Magnetic Resonance (1969). 21:109-113
An electron-spin resonance study of radicals formed from cyclic and acyclic carbonate esters by loss of a hydrogen atom is reported. The radicals were generated photolytically near room temperature in solutions containing 1 % H 2 O 2 . Spectra were a
Publikováno v:
Journal of the American Chemical Society. 98:7717-7723
Aqueous solutions of dipeptides containing about 1% hydrogen peroxide have been photolyzed at room temperature and the resulting radicals studied by electron spin resonance. The peroxide gives OH which abstracts hydrogen from the peptide. Radicals ar
Autor:
Ralph Livingston, Henry Zeldes
Publikováno v:
Journal of Magnetic Resonance (1969). 49:84-92
An assay of the concentration of a free radical in solution by ESR usually involves an evaluation of A ∞ , the double integral of the experimental derivative spectrum between essentially infinite field limits. The evaluation of A ∞ computationall
Autor:
Ralph Livingston, Henry Zeldes
Publikováno v:
Journal of Magnetic Resonance (1969). 25:67-81
An electron spin resonance study of the 1-hydro-3,5-pyridinedicarboxylate anion radical is reported for a broad range of NaOH concentrations in aqueous solutions. Observed effects are attributed to a reversible, base-catalyzed dissociation of the NH-
Publikováno v:
Journal of the American Chemical Society. 97:3198-3204
Autor:
Ralph Livingston, Henry Zeldes
Publikováno v:
The Journal of Physical Chemistry. 87:1086-1090
Benzyl ether has been pyrolyzed at 452, 474, and 497/sup 0/C at a pressure of 20.7 MPa. Benzyl has been observed by ESR, and product analyses have been made. The reaction C/sub 6/H/sub 5/CHOCH/sub 2/C/sub 6/H/sub 5/ ..-->.. C/sub 6/H/sub 5/CHO + C/su
Publikováno v:
Journal of the American Chemical Society. 101:4312-4319
ESR equipment has been developed for directly observing labile free radicals that are present at high temperatures. A pressurized fluid is heated as it slowly flows through the microwave cavity of the spectrometer. Temperatures to 566/sup 0/C and pre