Agricultural soils can contain high arsenic (As) concentrations due to specific geological contexts or pollution. Fertilizer amendments could influence As speciation and mobility thus increasing its transfer crops toxicity. In the present study, field-relevant amounts of fertilizers were applied from a cultivated field that was former ammunition-burning site. Potassium phosphate (KP), ammonium ...

A simple and sensitive kinetic-catalytic method was used for the determination of iodine concentration in human milk, cows' milk and infant formula. The method, based on the catalytic effect of iodine on the redox reaction between CeIV and AsIII, was first described by Sandell and Kolthoff. The calibration curve was constructed by plotting absorbance of CeIV after a known time versus iodine con...

The oxidation of arsenite (As(III)) via Mn-oxides is an important process for natural arsenic (As) cycling and for developing in situ strategies for remediation of As-contaminated waters. In this study, the influence of goethite (alpha-FeOOH), phosphate, and bacteria/biopolymer coatings on the initial As(III) oxidation kinetics by a hydrous Mn-oxide (delta-MnO(2)) is examined via both batch exp...

Globally, an estimated 9 million deaths per year are caused by human exposure to environmental pollutants, including toxic metal(loid) species. Since pollution is underestimated in calculations of the global burden disease, actual number pollution-related likely be substantially greater. Conversely, anticancer metallodrugs deliberately administered cancer patients, but their often dose-limiting...

We have used yeast Saccharomyces cerevisiae as a tool to identify the importance of mitochondrial processes involved in arsenic-induced carcinogenicity in humans. We screened 466 single-gene knockout strains of yeast S. cerevisiae known to be involved in biogenesis of mitochondria for sodium arsenite (AsIII) and sodium arsenate (AsV) sensitivity. We identified 72 arsenite-sensitive and 81 arsen...

This study examined the roles of arsenic translocation and reduction, and P distribution in arsenic detoxification of Pteris vittata L. (Chinese Brake fern), an arsenic hyperaccumulator and Pteris ensiformis L. (Slender Brake fern), a non-arsenic hyperaccumulator. After growing in 20% Hoagland solution containing 0, 133 or 267 microM of sodium arsenate for 1, 5 or 10 d, the plants were separate...

Arsenic (As) contamination of water is a global concern and rice consumption is the biggest dietary exposure to human posing carcinogenic risks, predominantly in Asia. Sulfur (S) is involved in di-sulfide linkage in many proteins and plays crucial role in As detoxification. Present study explores role of variable S supply on rice leaf proteome, its inclination towards amino acids (AA) profile a...