نتایج جستجو برای: p) > iron phosphate (fe

تعداد نتایج: 1528476  

Journal: :تحقیقات آب و خاک ایران 0
نسیم حیدری دانشجوی سابق کارشناسی ارشد گروه علوم خاک دانشکدة کشاورزی دانشگاه تبریز عادل ریحانی تبار استادیار گروه علوم خاک دانشکدة کشاورزی دانشگاه تبریز نصرت اله نجفی دانشیارگروه علوم خاک دانشکدة کشاورزی دانشگاه تبریز شاهین اوستان دانشیارگروه علوم خاک دانشکدة کشاورزی دانشگاه تبریز

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...

2006
D. Vantelon A. Hofmann K. Hanselmann A. M. Flank

In a high mountain lake and catchment area, a natural process of phosphorus enrichment is observed, induced by the iron-cycle. Investigations focus on the speciation of P and Fe in iron and manganese rich oxidic mineral crusts formed at the surface of rock pebbles. Iron and phosphorus are spatially associated although they are not forming iron phosphate minerals. While Fe and P K edge XAS spect...

2000
ANNELI GUNNARS SVEN BLOMQVIST PETER JOHANSSON CHRISTIAN ANDERSSON

The formation of Fe(III) oxyhydroxide colloids by oxidation of Fe(II) and their subsequent aggregation to larger particles were studied in laboratory experiments with natural water from a freshwater lake and a brackish coastal sea. Phosphate was incorporated in the solid phase during the course of hydrolysis of iron. The resulting precipitated amorphous Fe(III) oxyhydroxide phases were of varyi...

Journal: :Environmental science and pollution research international 2015
Jingna Du Jingchun Liu Haoliang Lu Dennis Hansell Qiong Zhang Wenyun Wang Chongling Yan

In this study, a pot experiment was conducted to evaluate the effect of phosphate (PO4 (3-)) addition on iron (Fe) cycling in mangrove ecosystem. Kandelia obovata (S. L.), one of the dominant mangrove species in the southeast of China, was cultivated in rhizoboxes under three different levels of P concentrations. Results showed the solid-phase Fe distribution and Fe(II)/Fe(III) values in both t...

Journal: :Journal of hazardous materials 2008
M Azizur Rahman H Hasegawa K Ueda T Maki M Mahfuzur Rahman

The uptake of arsenate (As(V)) and dimethylarsinic acid (DMAA) by aquatic macrophyte Spirodela polyrhiza L. was investigated to determine the influence of arsenic interaction with PO4(3-) and Fe ions. Plants were grown hydroponically on standard Murashige and Skoog (MS) culture solutions. Arsenic concentrations in Fe-oxide (Fe-plaque) on plant surfaces were determined by citrate-bicarbonate-eth...

Journal: :Journal of applied microbiology 2005
V Ivanov V Stabnikov W Q Zhuang J H Tay S T L Tay

AIM The application of iron-reducing bacteria (IRB) to phosphate removal from returned liquor (liquid fraction after activated sludge digestion and anaerobic sludge dewatering) of municipal wastewater treatment plant (WWTP) was studied. METHODS AND RESULTS An enrichment culture and two pure cultures of IRB, Stenotrophomonas maltophilia BK and Brachymonas denitrificans MK identified by 16S rRN...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Alexander Zaborin Kathleen Romanowski Svetlana Gerdes Christopher Holbrook Francois Lepine Jason Long Valeriy Poroyko Stephen P Diggle Andreas Wilke Karima Righetti Irina Morozova Trissa Babrowski Donald C Liu Olga Zaborina John C Alverdy

During host injury, Pseudomonas aeruginosa can be cued to express a lethal phenotype within the intestinal tract reservoir-a hostile, nutrient scarce environment depleted of inorganic phosphate. Here we determined if phosphate depletion activates a lethal phenotype in P. aeruginosa during intestinal colonization. To test this, we allowed Caenorhabditis elegans to feed on lawns of P. aeruginosa ...

2012
Ana Šantić Andrea Moguš-Milanković

Materials with disordered structures have a crucial role in the rapid development of new technologies. Improvement of these materials for particular application, as well as preparation of novel composites is based on a thorough understanding of the basic mechanisms of charge carrier transport. Among various classes of structurally disordered materials, a family of iron phosphate glasses attract...

Journal: :Metallomics : integrated biometal science 2014
Hans-Peter Gschwind Dietmar G Schmid Friedhelm von Blanckenburg Marcus Oelze Kirsten van Zuilen Alan J Slade Sylvie Stitah Daniel Kaufmann Piet Swart

SBR759 is a novel polynuclear iron(III) oxide-hydroxide starch·sucrose·carbonate complex being developed for oral use in chronic kidney disease (CKD) patients with hyperphosphatemia on hemodialysis. SBR759 binds inorganic phosphate released by food uptake and digestion in the gastro-intestinal tract increasing the fecal excretion of phosphate with concomitant reduction of serum phosphate concen...

2008
Madeli Castruita Yeala Shaked Lauren A. Elmegreen Edward I. Stiefel François M. M. Morel

We examined the bioavailability of iron-storage proteins—including representatives of maxiand miniferritins—to various species of marine phytoplankton. Both eukaryotic and prokaryotic species were able to grow rapidly with horse spleen ferritin (HoSF) or deoxyribonucleic acid (DNA)-binding proteins from starved cells (Dps) from Trichodesmium erythraeum as the sole Fe source in the medium. In th...

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