نتایج جستجو برای: p iron phosphate fe

تعداد نتایج: 1528476  

2012
Hidenari Inoue Takeshi Kuroiwa Tsuneo Shirai Ekkehard Fluck

The 57Fe M ößbauer spectra of mixed ligand com plexes o f the type frfl«5-Fe(CO)3L'L: (L 1 = triphenylphosphine or triphenylphosphite and L2 = phosphine or phosphite) show a quadrupolesplitting doublet typical of the disubstituted iron carbonyls in trigonal bipyramidal symmetry. The inverse linear dependence of the isomer shifts on the CO stretching frequencies is interpreted on the basis of th...

2008
Shyue Ping Ong Lei Wang Byoungwoo Kang Gerbrand Ceder

We present an efficient way to calculate the phase diagram of the quaternary Li-Fe-P-O2 system using ab initio methods. The ground-state energies of all known compounds in the Li-Fe-P-O2 system were calculated using the generalized gradient approximation (GGA) approximation to density functional theory (DFT) and the DFT+U extension to it. Considering only the entropy of gaseous phases, the phas...

2011
E. W. Gikonyo A. R. Zaharah M. M. Hanafi A. R. Anuar

Soil phosphorus (P) release capability could be assessed through the degree of P saturation (DPS). Our main objective was to determine DPS and, hence, P threshold DPS values of an Ultisol treated with triple superphosphate (TSP), Gafsa phosphate rocks (GPR), or Christmas Island phosphate rocks (CIPR), plus or minus manure. P release was determined by the iron oxide-impregnated paper strip (stri...

2007
Philip G. Reeves Lana C.S. DeMars

This experiment was designed to determine whether dietary hemoglobin (Hgb) iron (Fe) could 0271-5317/$ – see fro doi:10.1016/j.nutres.2 4 Corresponding a E-mail address: p sustain normal Fe status in growing rats adequate or deficient in copper (Cu). Forty-eight weanling rats were divided into 3 groups, each consisting of 16 animals. One group was fed a diet containing 40 mg Fe/kg as ferrous su...

Journal: :Geoderma 2022

• Effects of carbonate and phosphate on ferrihydrite transformation were investigated. Carbonate can override the retarding impact P transformation. promoted formation more crystalline rhombic hematite particles. Phosphate serve a different role in cycling nutrients & metals. In soils rhizospheres, iron (oxyhydr)oxides oxyanions like occur ubiquitously their interaction have important implicati...

Journal: :پژوهش های خاک 0
فرنک مشبکی اصفهانی دانشجوی کارشناسی ارشد ، دانشگاه آزاد اسلامی واحد علوم وتحقیقات فارس حسین بشارتی دانشیار، مؤسسه تحقیقات خاک و آب کشور

phosphorus is an essential element for plants. much of the agricultural lands of iran has calcareous soils, in which, due to high ph, phosphorous availability is less, therefore, it appears as a limiting factor for plant growth. application of biofertilizers instead of chemical ones has gained attention in order to produce healthy crops, reduce pollution of soil and water resources by reducing ...

2009
Mondher Dhifet Mohamed Salah Belkhiria Jean-Claude Daran Habib Nasri

As part of a systematic investigation for a number of Fe(II) porphyrin complexes used as biomimetic models for cytochrome P450, crystals of the title compound, [K(C(18)H(36)N(2)O(6))][Fe(II)(C(64)H(64)N(8)O(4))(HS)], were prepared. The compound exhibits a non-planar conformation with major ruffling and saddling distortions. The average equatorial iron-pyrrole N atom [Fe-N(p) = 2.102 (2) Å] bond...

Journal: :Clean-soil Air Water 2021

This study evaluates the arsenic adsorption behavior of Fe-exchanged smectite and phosphate-bound kaolinite, in soil, tap water double distilled presence competing anions such as silicate, phosphate, sulfate, at variable pH values. The maximum amounts As adsorbed soil are 620.6 607.6 µg g–1 5 by respectively. pH-modified Freundlich equation fits well (R2 > 0.96) to data, distinguishing effect o...

Journal: :Plant physiology 1992
E Lesuisse P Labbe

The ferri-reductase activity of whole cells of Saccharomyces cerevisiae (washed free from the growth medium) was markedly increased 3 to 6 h after transferring the cells from a complete growth medium (preculture) to an iron-deficient growth medium (culture). This increase was prevented by the presence of iron, copper, excess oxygen, or other oxidative agents in the culture medium. The cells wit...

The availability of iron for roots has been demonstrated as a critical factor in plant production. The addition of synthetic iron chelates to soil is a common practice in agriculture, which is not economically beneficial. Besides, chemical iron fertilizers cause many problems such as food contamination and environmental pollution. Development of natural Ferrioxamine B as an efficient and safe i...

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