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Titolo:
COMPARISON OF ELECTROCHEMICAL AND ENZYMATIC OXIDATION OF 1,3-DIMETHYLURIC ACID
Autore:
GOYAL RN; SINGHAL NK;
Indirizzi:
UNIV ROORKEE,DEPT CHEM ROORKEE 247667 UTTAR PRADESH INDIA
Titolo Testata:
Bioelectrochemistry and bioenergetics
fascicolo: 2, volume: 44, anno: 1998,
pagine: 201 - 208
SICI:
0302-4598(1998)44:2<201:COEAEO>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRODES; DERIVATIVES; CHEMISTRY;
Keywords:
ELECTROOXIDATION; ENZYMATIC OXIDATION; 1,3-DIMETHYLURIC ACID;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
R.N. Goyal e N.K. Singhal, "COMPARISON OF ELECTROCHEMICAL AND ENZYMATIC OXIDATION OF 1,3-DIMETHYLURIC ACID", Bioelectrochemistry and bioenergetics, 44(2), 1998, pp. 201-208

Abstract

Electrochemical oxidation of 1,3-dimethyluric acid has been studied in phosphate buffers of pH 2.3-10.3 at pyrolytic graphite electrode. The conjugate base has been found as the electroactive species and a single well-defined oxidation peak was observed. The presence of methyl groups have been found to shift E-p of uric acid towards less positive potential by 30-40 mV. The products of electrooxidation were separatedby HPLC at pH 3.0 and were characterized as 1,3-dimethylalloxan and urea. At pH 7.0, the major product was 5-hydroxyhydantoin-5-(N-methyl) carboxamide. The spectral studies during enzymic oxidation of 1,3-dimethyluric acid generated UV-absorbing intermediate similar to electrooxidation and the rate of decay was found to be same in both the cases. The electrochemical and enzymic oxidations appear to proceed by an identical mechanism. (C) 1998 Elsevier Science S.A.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:31:46