information about forms of phosphorus (p) is important for the evaluation of p status in soil and also understanding of the soil fertility and plant nutrition. to obtain such information and to determine the relationship between the p forms from soil characteristics, amount of different organic and inorganic p forms of 20 soil composite samples of eastern azerbaijan province, iran were determin...

The field of “Metals in Medicine” presents an unusual marriage disciplines, merging the hard science inorganic chemistry with intricacy and variability biochemistry physiology. Researchers dedicate themselves to understanding, perturbing, activities metals that are found biology influence human health, or introducing unnatural systems materials for detection, monitoring, treatment disease.

Iron is unique among inorganic nutriments because primary control of body homeostasis resides with absorption, not with excretion (1). However, the pathway by which iron is transported in the gut is not necessarily unique; it may be shared with cations whose absorption waxes and wanes in parallel with that of iron, but whose total body balance is maintained by ready excretion. The question of w...

During the course of an investigation of the components involved in the electron transport pathway in Pseudomonas $uorescens (1)) the problem arose as to the nature of the carriers mediating the transfer of electrons between the diaphorase and bacterial cytochrome c. Mahler and Elowe (2) have reported the involvement of iron as a component of the DPNH’ cytochrome c reductase from pig heart. Rem...

1. Oxygen radicals in biological systems and the importance of iron Oxygen radicals can be either organic or inorganic. The organic radicals such as the peroxy (ROO') and alkoxy (RO') are those derived from complex molecules like the polyunsaturated fatty acids. The inorganic oxygen radicals are the superoxide radical (O,-*) and the hydroxyl radical (OH'). Formation of the highly reactive hydro...

O G Inorganic Nanoparticles for MRI Contrast Agents R E S By Hyon Bin Na, In Chan Song, and Taeghwan Hyeon* S R E P O R T Various inorganic nanoparticles have been used as magnetic resonance imaging (MRI) contrast agents due to their unique properties, such as large surface area and efficient contrasting effect. Since the first use of superparamagnetic iron oxide (SPIO) as a liver contrast agen...

Anammox coupling with nitrate reduction under various electron donors was studied using sludge acclimatized to have anammox and denitrification activities. Due to a deficiency in electron donors for NO(3)(-) reduction, anammox activity in an inorganic medium containing NO(3)(-) and NH(4)(+) was lower than that in NO(2)(-) and NH(4)(+). Anammox could use NO(2)(-) competitively against denitrifie...

Corrosion scales and deposits formed within drinking water distribution systems (DWDSs) have the potential to retain inorganic contaminants. The objective of this study was to characterize the elemental and structural composition of extracted pipe solids and hydraulically-mobile deposits originating from representative DWDSs. Goethite (alpha-FeOOH), magnetite (Fe(3)O(4)) and siderite (FeCO(3)) ...

The paper describes the use of an extrinsic tag of inorganic radioiron to determine the total absorption of nonheme iron from a complete meal. The method was developed by measuring the iron absorbed from vegetable foods containing biosynthetically incorporated (55)Fe (intrinsic tag) and from (59)Fe added as a small dose of inorganic iron to the same meal (extrinsic tag). In studies with maize, ...

1. Absorption of inorganic iron was studied in thirty-four patients with chronic renal failure by a double isotope technique. 2. Eight patients with normal iron balance had a mean absorption of 3-5%, ten patients with iron overload had a mean absorption of 3.6%, and sixteen patients with iron depletion had a mean absorption of 58%. Thus, alterations in absorption appeared to be related to distu...