While iron-catalyzed Kumada cross-coupling reactions with simple iron salts have been known since the early 1970s, the nature of the in situ-formed iron species remains elusive. Herein, we report the synthesis of the homoleptic tetralkyliron(III) ferrate complex [MgCl(THF)5][FeMe4] from the reaction of FeCl3 with MeMgBr in THF. Upon warming, this distorted square-planar S = (3)/2 species conver...

The tolerance of volunteer patients to various ferrous salt preparations, administered orally in equivalent doses of elemental iron, has been compared. The palatability of ferrous sulphate tablets, BP, given before meals was not improved by administration after meals, by sustained release formulation, or by substituting other ferrous salts. Intolerance was related to the number of tablets rathe...

The peroxidation of membrane phospholipids induced in vitro by ascorbic acid or by dialuric acid (hydroxybarbituric acid) does not occur in the absence of traces of metal ions. Peroxidation induced by adding iron salts to phospholipids can either be promoted or inhibited by the chelators EDTA, diethylenetriaminepenta-acetic acid and bathophenanthrolinesulphonate, depending on the ratio [chelato...

Poly(acrylic acid) coated superparamagnetic iron oxide nanoparticles were prepared in aqueous solutions of iron salts with in situ coating of poly(acrylic acid). Influence of reaction variables, namely, iron concentration, reactive(COOH)/iron mole ratio, base (NH4OH) amount and polymer molecular weight, primarily on hydrodynamic size and stability of the particles was investigated. Also, size a...

1. Superoxide and hydrogen peroxide are formed by activated phagocytes and react together in the presence of iron salts to form the hydroxyl radical, which attacks hyaluronic acid. Ascorbic acid also interacts with hydrogen peroxide and iron salts to form hydroxyl radical in a reaction independent of superoxide. Since iron salts, ascorbate and activated phagocytes are present in the rheumatoid ...

Six Gardnerella vaginalis strains were examined for the ability to utilize various iron-containing compounds as iron sources. In a plate bioassay, all six strains acquired iron from ferrous chloride, ferric chloride, ferrous sulfate, ferric ammonium citrate, ferrous ammonium sulfate, bovine and equine hemin, bovine catalase, and equine, bovine, rabbit, and human hemoglobin. All six strains also...

A rigid linear bis-bidentate quaterpyridine undergoes metal directed self-assembly with iron(ii) salts yielding M(4)L(6) host-guest complexes; selective anion binding for PF(6)(-) over BF(4)(-) is observed.

natural organic wastes contain considerable amounts of nutritional elements. the availability and uptake of nutrient elements in soil) especially in alkali and calcareous soils) increase due to high content of organic matter, and reduce the micro-elements deficiencies. organic wastes have pathogenic contaminations that come from waste type and transmitted by microorganisms such as bacteria, fun...

Abstract Due to the increase in horticultural production intensive techniques are needed. These generate soil degradation, since natural recovery time between crops is insufficient. The usual way solve this problem use of fertilizers, as they effective short available. Conventional fertilizers highly soluble salts, allowing their absorption by plant roots. However, dumped on soils more quantity...

Of the essential inorganic minerals, the micronutrients (manganese, iron, copper, and zinc) have held special interest in plant physiology because of their chemistry, duality as both nutrient and toxin, availability, and biogeochemical history. The green tissues of plants readily exhibit visual symptoms of metal deficiency, and even before the role of metals in photosynthesis was understood, th...