Mercuric Hg(II) species form complexes with natural dissolved organic matter (DOM) such as humic acid (HA), and this binding is known to affect the chemical and biological transformation and cycling of mercury in aquatic environments. Dissolved elemental mercury, Hg(0), is also widely observed in sediments and water. However, reactions between Hg(0) and DOM have rarely been studied in anoxic en...

[no abstract available]

ID: 2066 Title: Performance Evaluation of HgI2 Photoconductors for Radiation

The reduction of NAD catalyzed by pig heart mitochondrial malate dehydrogenase can be stimulated by low concentrations, approximately 0.05 mM, of Hg-‘+. This activation is dependent on the presence of the substrate malate at the time the enzyme is exposed to Hg-‘-+. The stimulation is both pHand temperature-dependent, with maximum stimulation occurring near pH 8.8 and 30”. The activation is not...

In the mol-ecule of the title compound, [HgCl(2)(C(10)H(9)N(3))], the Hg(II) atom is four-coordinated in a distorted tetra-hedral configuration by two N atoms from the chelating di-2-pyridylamine ligand and by two Cl atoms. In the crystal structure, inter-molecular N-H⋯Cl hydrogen bonds link the mol-ecules into centrosymmetric dimers. There is a π-π contact between the pyridine rings [centroid-...

In the title complex, [Hg(CN)(2)(C(3)H(8)N(2)S)(2)], the Hg(II) atom is located on a twofold rotation axis. It is four-coordinate having an irregular tetra-hedral geometry composed of two cyanide C atoms [Hg-C = 2.090 (6) Å] and two thione S atoms of N,N'-dimethyl-thio-urea (dmtu) [Hg-S = 2.7114 (9) Å]. The NC-Hg-CN bond angle of 148.83 (13)° has the greatest deviation from the ideal tetra-hedr...

A method based on cold vapor generation inductively coupled plasma mass spectrometry (CVG-ICP-MS) has been developed for determination of inorganic mercury, Hg(II), and total mercury in fish otoliths. Sodium borohydride (NaBH(4)) was used as the only reducing agent and its concentration was optimized across an acidity gradient to selectively reduce Hg(II) without affecting methylmercury, CH(3)H...