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E Volanschi

Publications and source records attributed to E Volanschi.

5 recordsLinked to original sources
PubMed1996

Spectral and interferometrical study of the interaction of haemin with glutathione.

The interaction of haemin with reduced glutathione (GSH) was investigated in vitro and the association constant was determined by both spectrophotometric and interferometric methods. In order to elucidate the nature of this interaction, the reaction of haemin with a typical reductive agent (sodium dithionite) and a typical chelating agent for hem-iron (histidine) was also studied. Haemin-induced haemolysis in the presence and absence of GSH was monitored spectrophotometrically. The results outline the role of GSH at physiological concentration in preventing erythrocyte damage by haemin.

Erythrocyte Membrane↗
PubMedDate not supplied

Spectrophotometric assay of the interaction of Plasmodium berghei infected erythrocyte lysates and neutral red.

In order to reveal by absorption spectrophotometry the redox differences between the Plasmodium berghei infected erythrocyte lysates (MEL) and the healthy ones (HEL) we studied their interaction with the neutral red (NR) redox dye. The variation of the dye absorption intensity at 540 nm as a function of the hemoglobin content of the samples was attributed to the redox potential variation of the different hemoglobin aggregates formed in the samples containing different hemoglobin quantities. By short term treatment of the lysates with ascorbic acid in the presence of NR, great redox reactivity difference was proved between MEL and HEL as revealed by absorption and explained by the initial higher oxidation state of the Hb iron in MEL than in HEL.

Animals↗