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Croatica Chemica Acta, Vol. 61 No. 4, 1988.

Izvorni znanstveni članak

On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping

Sergey M. Shevchenko ; »Rudjer Bošković" Institute, 41000 Zagreb, Yugoslavia
Valentin E. Zubarev ; Moscow University, Moscow, USSR
Andrey P. Rudenko ; Leningrad Forest Technical Academy, 194018 Leningrad, USSR

Puni tekst: engleski, pdf (5 MB) str. 763-773 preuzimanja: 74* citiraj
APA 6th Edition
Shevchenko, S.M., Zubarev, V.E. i Rudenko, A.P. (1988). On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping. Croatica Chemica Acta, 61 (4), 763-773. Preuzeto s https://hrcak.srce.hr/176000
MLA 8th Edition
Shevchenko, Sergey M., et al. "On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping." Croatica Chemica Acta, vol. 61, br. 4, 1988, str. 763-773. https://hrcak.srce.hr/176000. Citirano 04.03.2021.
Chicago 17th Edition
Shevchenko, Sergey M., Valentin E. Zubarev i Andrey P. Rudenko. "On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping." Croatica Chemica Acta 61, br. 4 (1988): 763-773. https://hrcak.srce.hr/176000
Harvard
Shevchenko, S.M., Zubarev, V.E., i Rudenko, A.P. (1988). 'On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping', Croatica Chemica Acta, 61(4), str. 763-773. Preuzeto s: https://hrcak.srce.hr/176000 (Datum pristupa: 04.03.2021.)
Vancouver
Shevchenko SM, Zubarev VE, Rudenko AP. On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping. Croatica Chemica Acta [Internet]. 1988 [pristupljeno 04.03.2021.];61(4):763-773. Dostupno na: https://hrcak.srce.hr/176000
IEEE
S.M. Shevchenko, V.E. Zubarev i A.P. Rudenko, "On Formation of Anthrasemiquinone in the Conditions of Wood Alkaline Pulping", Croatica Chemica Acta, vol.61, br. 4, str. 763-773, 1988. [Online]. Dostupno na: https://hrcak.srce.hr/176000. [Citirano: 04.03.2021.]

Sažetak
Electron spin resonance (ESR) and electronic absorbance
spectral experiments demonstrate that reversible temperature
variation of anion-radica1 concentration in the system anthraqui;
none (AQ) - anthrasemiquinone (AS) - anthrahydroquinone
(AHQ) in aqueous alka1i is a property of that system and not of
the more complicated catalyst-wood system. Lignin model compounds
present in low concentrations have no influence on this variation. A raise of radical concentration is accompanied by a change of the solution colour from red into yellow. In pulping conditions AQ can be reduced either by the hydrocarbon or by the lignin component of wood, probably also by numerous organic compounds and even by the alka1i itself. As a result of this process, an AQ-AS-AHQ system is being formed.

Hrčak ID: 176000

URI
https://hrcak.srce.hr/176000

Posjeta: 144 *