A review of iron species for visible-light photocatalytic water purification.

Iron species are one of the least toxic and least expensive substances that are photocatalytic in the visible region of the spectrum. Therefore, this article focuses on iron-based photocatalysts sensitive to visible light. Photo-Fenton reactions are considered with respect to those assisted by and involve the in situ production of H₂O₂.

Synthetic reevesite-like material as a visible light photocatalyst for the decontamination of water.

A synthetic reevesite-like material has been shown to decolorize selected dyes and degrade phenolic contaminants photocatalytically in water when irradiated with visible light. This material can photoactively decolorize dyes such as bromophenol blue, bromocresol green, bromothymol blue, thymol blue and methyl orange in less than 15 min under visible light radiation in the absence of additional oxidizing agents. Conversely, phenolic compounds such as phenol, p-chlorophenol and p-nitrophenol are photocatalytically degraded in approximately 3h with additional H2O2 when irradiated with visible light.

Membrane topology of the DrrB protein of the doxorubicin transporter of Streptomyces peucetius.

Daunorubicin and doxorubicin, two commonly used anticancer agents, are produced by the soil bacterium Streptomyces peucetius. Self-resistance to these antibiotics in S. peucetius is conferred by the drrAB locus that codes for two proteins, DrrA and DrrB.