The molecular structure of the mineral sarmientite Fe2(AsO4,SO4)2(OH)6·5H2O – Implications for arsenic accumulation and removal - ScienceDirectSarmientite is an environmental mineral; its formation in soils enables the entrapment and immobilisation of arsenic. The mineral sarmientite is often ...
From a fundamental point of view, hydrogen has a unique chemistry, in view of its small mass, the presence of a single 1 s valence orbital, the absence of core and non-bonding electrons, and an anomalously high electronegativity [4]. These factors contribute to the versatility of the M...
The individual components were unambiguously identified by direct comparison of GC- retention times and EI-mass spectra with those of authentic 3, 4, 5, and 1 that were generated from FPP in a separate incubation with recombinant S. coelicolor A3(2) germacradienol/geosmin synthase [15]. A ...
McPhee Received: 21 October 2016; Accepted: 28 November 2016; Published: 2 December 2016 Abstract: Some novel hydrazone derivatives 6a–o were synthesized from the key intermediate 4-Chloro-N-(2-hydrazinocarbonyl-phenyl)-benzamide 5 and characterized using IR, 1H-NMR, 13C-NMR, mass spectroscopy...
The filtered culture supernatant was fractionated by ultrafiltration followed by three chromatographic steps, which resulted in the isolation of a homogeneous low-molecular-weight xylanase (Xyl-O1) with a mass of 21.5 kDa as determined by sodium dodecyl sulfate-polyacrilamide gel electrophoresis (SDS-...
The mass spectra were executed on a Micromass Q-Tof system (Waters, UK). Elemental analyses were done with a FLASHEA 112 analyzer (Shimadzu, Mumbai, Maharashtra, India) and all analyses were consistent (within 0.4%) with theoretical values. A Vibra Cell VCX-500 ultrasound synthesizer (Sonics...
The element iron (Latin ferrum), atomic number 26, relative atomic mass 55.85, has an electronic configuration [Ar] 3d6 4s2. Iron normally occurs in one of three oxidation states iron(0) (metallic iron), iron(II) and iron(III). Iron(II) and iron(III) compounds were formerly called ‘...