Chelating is the chemical process by which a mineral (iron, cobalt, copper, zinc, and manganese) is combined with a mixture of amino acids and peptides. The resulting substances are known as chelates. Another descriptive term, proteinates, refers to the amino acid bond. These chelated minerals are thought to be more digestible than nonchelated forms. In other words, chelation makes the minerals...

chelating is the chemical process by which a mineral (iron, cobalt, copper, zinc, and manganese) is combined with a mixture of amino acids and peptides. the resulting substances are known as chelates. another descriptive term, proteinates, refers to the amino acid bond. these chelated minerals are thought to be more digestible than nonchelated forms. in other words, chelation makes the minerals...

Chelating is the chemical process by which a mineral (iron, cobalt, copper, zinc, and manganese) is combined with a mixture of amino acids and peptides. The resulting substances are known as chelates. Another descriptive term, proteinates, refers to the amino acid bond. These chelated minerals are thought to be more digestible than nonchelated forms. In other words, chelation makes the minerals...

Aspects of the kinetics and thermodynamics of the iron-catalysed Haber-Weiss reaction are discussed with special emphasis on the potential in vivo sources of iron. In addition, the properties of the iron chelates that inhibit the Haber-Weiss reaction are considered.

Iron in man is held within the cells incorporated in organic complex molecules, either as functional iron, i.e., hemoglobin and tissue enzymes, or as storage iron, i.e., ferritin and hemosiderin. Owing to the requirements of the erythroid marrow in particular, large amounts of iron must constantly pass from one cell to another through the plasma. This plasma transport is brought about by a #3gl...

Alveolar macrophages (AM) from smokers contain a much higher quantity of intracellular iron than AM from nonsmokers. Since some forms of iron will catalyze the formation of hydroxyl radical (.OH) from superoxide and hydrogen peroxide, the ability of AM derived from smokers and nonsmokers to generate .OH was assessed. No detectable .OH was produced by AM from either source, suggesting that iron ...

Different root parts with or without increased iron-reducing activities have been studied in iron-deficient and iron-sufficient control sugar beet (Beta vulgaris L. Monohil hybrid). The distal root parts of iron-deficient plants, 0 to 5 mm from the root apex, were capable to reduce Fe(III)-chelates and contained concentrations of flavins near 700 microM, two characteristics absent in the 5 to 1...

Microbial iron chelates, called siderophores, are synthesized by bacteria and fungi in response to low iron availability in the environment. The present review summarizes structural details of siderophore ligands with respect to their transport properties. This presentation is largely centred on the occurrence and function of siderophores in the various bacterial and fungal genera.

The industry standard iron source for algae culture is in most cases Ethylenediaminetetraacetic acid ferric sodium salt (Fe-EDTA). During algae production pH and light intensity are not favorable for maintaining the integrity of the Fe-EDTA complex. As a consequence, iron availability becomes the limiting factor for growth. A series of growth studies and biomass determinations with a selection ...

The effects of four widely employed “antioxidants” on iron-mediated hydroxyl radical formation and lipid peroxidation were studied in aqueous model systems. Iron and copper served as catalysts for the reactions which oxidized ascorbic acid and alpha-tocopherol and reduced oxygen. Ferrous ion spontaneously reduced oxygen to 0; (superoxide anion radical) which led to .OH (hydroxyl radical) and Hz...