Naslov
Pojedinačni reakcijski stupnjevi u radiolitičkoj hidroperoksidaciji nezasićenih masnih kiselina
(Elementary reaction steps in radiation induced hydroperoxidation of unsaturated fatty acids)

Autori
Katušin-Ražem, Branka ; Ražem, Dušan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Sažeci XV. Hrvatskog skupa kemičara i kemijskih inženjera / Gojo, M ; Trajkov, N ; Smolec, S. - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 1997, 148-148

Skup
XV. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Opatija, Hrvatska, 24.03.1997. - 26.03.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Sažetak
Chain oxidation of unsaturated fatty acids (LH): oleic (OH), linoleic (LiH) and linolenic (LinH) was initiated by 60-Co gamma razs at various dose rates. The measured radiation chemical yields of respective fatty acid pydroperoxides, G(LOOH), were inversely proportional to the square root of the dose rate, P, indicating a chain mechanism with bimoleculart termination of propagating radicals,...(Equation)... where kp and kt are propagation and termination rate constants respectively, and G(L') is the radiation chemical yield of initiating alkyl radicals (L'). G(L') was determined by the inhibitor method using alpha-tocopherol (alpha-toc) and measuring inhibition dose, Dinh: (Equation). From these measurements respective oxidizibilities and kinetic chain lengths v could be calculated. However, individual values of kp and kt could not be determined from a steady-state radiolysis data. Absolute value of the termination rate constant was measured independently, by the method of intermittent irradiation, for which a special apparatus was constructed. Thus absolute value of kp could be calculated.

Izvorni jezik
Hrvatski

Znanstvena područja
Kemija

POVEZANOST RADA