ArsD is a metallochaperone that delivers As(III) to the ArsA ATPase, the catalytic subunit of the ArsAB pump encoded by the arsRDABC operon of Escherichia coli plasmid R773. Conserved ArsD cysteine residues (Cys(12), Cys(13) and Cys(18)) construct the As(III) binding site of the protein, however a global structural understanding of this arsenic binding remains unclear. We have obtained NMR assi...

The use of the term “heavy metal” is regularly questioned by scientific community. Here, we followed evolution (1970–2020) in number published papers including this their title. Thus, can evidence a continuous, albeit sometimes stabilizing, increase especially environmental journals. After several other warning opinions, propose that it should be replaced literature terms like “metal”, “metallo...

Antimony (Sb) is a toxic and potentially carcinogenic metalloid element. The toxicity of Sb in the environment strongly relies on its speciation. It necessary to investigate speciation content antimony soil order understand better real risk associated with environment. This study developed water bath heating soaking-AFS methods determine available carbonate soil. Through analysis mutual verific...

Deposition of arsenic in mice through groundwater is well documented but little is known about the histological changes of organs by the metalloid. Present study was designed to evaluate arsenic-induced histological alterations in kidney, liver, thoracic artery and brain of mice which are not well documented yet. Swiss albino male mice were divided into 2 groups and treated as follows: Group 1:...

The data presented in this article are related to the research article entitled "Child and adult exposure and health risk evaluation following the use of metal- and metalloid-containing costume cosmetics sold in the United States" [1]. This article describes the concentration of metals and metalloids contained in various cosmetic products such as body paint, lipstick and eye shadow, the relativ...

Arsenic is the chemical element that has the symbol As, atomic number 33 and atomic mass 74.92. Arsenic was first documented by Albertus Magnus in 1250.[4] Arsenic is a notoriously poisonous metalloid with many allotropic forms, including a yellow (molecular non-metallic) and several black and grey forms (metalloids). Three metalloidal forms of arsenic, each with a different crystal structure, ...

Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, ...

23 The concentrations of 9 elements (Ag, As, Cd, Co, Cr, Cu, Mn, Ni and Zn) were measured 24 in the oyster Isognomon isognomon and the edible clam Gafrarium tumidum from different 25 sites along the SW New Caledonian coast which is subjected to important chemical inputs due 26 to intense land-based mining activities (New Caledonia is the third world producer of nickel). 27 Results indicate that...

Elemental silicon (Si), after oxygen, is the second most abundant element in the earth's crust, which is mainly composed of silicates. Si is not considered essential for plant growth and development, however, increasing evidence in the literature shows that this metalloid is beneficial to plants, especially under stress conditions. Indeed Si alleviates the toxic effects caused by abiotic stress...

This is the first comprehensive examination of Turyanchay River in Azerbaijan, focusing on water quality (WQ), contamination, and biodiversity at four different locations: Gabala, Agdash, Udjar Zardab. The study analysed nutrient (nitrate, ammonium, phosphate) metal/metalloid (Pb, Cu, Ni, Zn, Mn, Cr, Cd, Fe Al) contamination levels, as well diversity macrozoobenthos river, birds vegetation. che...