Presence of iron ions

In this paper, oxidation of red methyl (MR) - an azo in dye by UV / H2O2 was studied. The effect of solution volume and initial concentration was studied. Under optimal conditions, project a UV light through the bottom of the solution containing MR. The rate of color change is proportional to the increase of H2O2 concentration. After 50 minutes, the decolorization effect with 16 ppm H2O2 is 38%, slightly higher than the content of 14 ppm H2O2.

5p khidoichuoi 04-03-2020 27 3   Download

There is an increasing interest in the use of lanthanides in medicine. However, themechanismof their accumulation in cells isnotwell understood.Lanthanidecations are similar to ferric ions with regard to transferrin binding, suggesting transferrin-receptormediated transport is possible; however, this has not yet been confirmed. In order to clarify this mechanism, we investigated the binding of Yb 3+ to apo-transferrin by UV-Vis spectroscopy and stopped-flow spec-trophotometry, and found that Yb 3+ binds to apotransferrin at the specific iron sites in the presence of bicarbonate. ...

9p tumor12 22-04-2013 35 2   Download