ВЛИЯНИЕ ХИМИЧЕСКОГО СОСТАВА ПОВЕРХНОСТНЫХ ВОД НА ИНТЕНСИВНОСТЬ ФОТОЛИЗА ГЛУТАТИОНА
Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
CEP USM
Abstract
A fost studiată influența ionilor metalelor de tranziție (Cu(II) și Fe(III)) și mineralizării apelor asupra intensității trans-
formărilor fotochimice ale glutationului pe sisteme model. S-a stabilit că prezența ionilor de Cu(II) contribuie la creșterea
vitezei de fotoliză a tiolului de 3,8 ori (kf=(3,90±0,10)·10-4s-1), iar prezența ionilor de Fe(III) de 8,5 ori (kf=(3,32±0,09)·10-4s-1)
comparativ cu sistemele catalitice neiradiate, unde în sistemul cu ionii de Cu(II) intensitatea fotolizei constituie
kr=(1,02±0,07)·10-4s-1 și, respectiv, kr=(0,39±0,06)·10-4s-1, pentru sistemul cu ionii de Fe(III). A fost stabilit că mineralizarea
apelor, condiționată de ionii HCO3-, contribuie la creșterea substanțială a vitezei fotolizei glutationului (kf=(1,14±0,02)·10-3s-1).
A fost stabilit că macrocomponenții apelor, exprimați prin ionii HCO3-, la valorile pH-ului bazic, contribuie la inhibiția
formării radicalilor liberi, cu generarea altor forme cu o activitate mai scăzută, dintre care radicalul CO3.
The influence of transition metal ions (Cu(II) and Fe(III)) and water mineralization on the intensity of glutathione photochemical transformations on model systems was studied. It was established that the presence of Cu(II) ions contributes to the increase of the thiol photolysis rate by 3.8 times (kf=(3,90±0,10)·10-4s-1), and the presence of Fe(III ) 8.5 times (kf=(3,32±0,09)·10-4s-1) compared to non-irradiated catalytic systems, where in the system with Cu(II) ions the photolysis intensity is kr=(1,02±0,07)·10-4s-1 and, respectively, kr=(0,39±0,06)·10-4s-1, for the system with Fe(III) ions. It was established that the mineralization of waters, conditioned by HCO3- ions, contributes to the substantial increase in the photolysis rate of glutathione (kf=(1,14±0,02)·10-3s-1). It was established that the macrocomponents of water, expressed by HCO3- ions, at basic pH values, contribute to the inhibition of the formation of free radicals, with the generation of other forms with a lower activity, among which the radical CO3.-.
The influence of transition metal ions (Cu(II) and Fe(III)) and water mineralization on the intensity of glutathione photochemical transformations on model systems was studied. It was established that the presence of Cu(II) ions contributes to the increase of the thiol photolysis rate by 3.8 times (kf=(3,90±0,10)·10-4s-1), and the presence of Fe(III ) 8.5 times (kf=(3,32±0,09)·10-4s-1) compared to non-irradiated catalytic systems, where in the system with Cu(II) ions the photolysis intensity is kr=(1,02±0,07)·10-4s-1 and, respectively, kr=(0,39±0,06)·10-4s-1, for the system with Fe(III) ions. It was established that the mineralization of waters, conditioned by HCO3- ions, contributes to the substantial increase in the photolysis rate of glutathione (kf=(1,14±0,02)·10-3s-1). It was established that the macrocomponents of water, expressed by HCO3- ions, at basic pH values, contribute to the inhibition of the formation of free radicals, with the generation of other forms with a lower activity, among which the radical CO3.-.
Description
Keywords
fotoliză, tioli, glutation, mercaptidă, mineralizare, autopurificare, ape naturale, photolysis, thiol, glutathione, mercaptide, mineralization, self-purification, natural waters
Citation
БЛОНСКИ, Владислав; ГЛАДКИ, Виорика; ЧИСТЯКОВ, Максим. Влияние химического состава поверхностных вод на интенсивность фотолиза глутатиона. În: Studia Universitatis Moldaviae.Științe reale și ale naturii. 2022, nr.6(156), Chișinău. CEP USM, 2022,pp.182-189.ISSN 1814-3237