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Titolo:
KINETIC-STUDIES OF THE PHOTOCHEMICAL DECOMPOSITION OF ALKANNIN SHIKONIN ENANTIOMERS
Autore:
CHEN FA; CHENG HW; WU AB; HSU HC; CHEN CY;
Indirizzi:
TAIPEI MED COLL,GRAD INST PHARMACEUT SCI TAIPEI TAIWAN TAIPEI MED COLL,GRAD INST PHARMACEUT SCI TAIPEI TAIWAN CHIA NAN JR COLL PHARM,DEPT PHARMACEUT TAINAN TAIWAN
Titolo Testata:
Chemical and Pharmaceutical Bulletin
fascicolo: 1, volume: 44, anno: 1996,
pagine: 249 - 251
SICI:
0009-2363(1996)44:1<249:KOTPDO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANTI-TUMOR ACTIVITY; DERIVATIVES;
Keywords:
ALKANNIN/SHIKONIN ENANTIOMER; SHIKON; PHOTOCHEMICAL DECOMPOSITION; PHOTODEGRADATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
F.A. Chen et al., "KINETIC-STUDIES OF THE PHOTOCHEMICAL DECOMPOSITION OF ALKANNIN SHIKONIN ENANTIOMERS", Chemical and Pharmaceutical Bulletin, 44(1), 1996, pp. 249-251

Abstract

The photodegradation of alkannin/shikonin (A/S) was studied as a function of solvent polarity, pH and ionic strength, This process follows an apparent first-order kinetic reaction, The photodegradation rate isinversely proportional to the solvent polarity in the order of chloroform > dichloromethane > 2-propanol > ethanol > methanol. The rate-pH profile reveals that A/S is more stable in an acidic condition: marginally subject to specific acid or base catalysis and is affected by twoionizable groups on the molecule, Ionic strength does not affect the photochemical decomposition rate at pH 5, 9 or 12.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 07:42:55