نتایج جستجو برای: fe zn
تعداد نتایج: 109658 فیلتر نتایج به سال:
We examined metal-to-calcium ratios (Fe/Ca, Mn/Ca and Zn/Ca) in the growth bands of two Porites corals from Daya Bay, South China Sea, in order to trace long-term trends in local ambient pollution levels. Although Fe and Mn did not show any obvious increasing trends over 32 years in the period 1976-2007, peak values of Fe/Ca and Mn/Ca occurred in the mid-late 1980s, temporally-coeval with the l...
The title compound, [Fe(C(14)H(14)N(3)O(2))Cl(2)]·[ZnCl(2)(C(14)H(15)N(3)O(2))], is formulated as [Fe(III)(bpg)Cl(2)][Zn(II)Cl(2)(bpgH)], where bpg is the tetra-dentate ligand N,N-bis-(2-pyridylmeth-yl)glycine. The structure contains one crystallographically distinct complex with Fe(III) and Zn(II) atoms present in a 50:50 ratio in a single-atom site. The non-coordinated O atoms of the carboxyl...
More than two billion people are micronutrient deficient. Polished grains of popular rice varieties have concentration of approximately 2 μg g(-1) iron (Fe) and 16 μg g(-1) zinc (Zn). The HarvestPlus breeding programs for biofortified rice target 13 μg g(-1) Fe and 28 μg g(-1) Zn to reach approximately 30% of the estimated average requirement (EAR). Reports on engineering Fe content in rice hav...
To investigate the correlations among seminal plasma Magnesium (Mg), Phosphorus (P), Potassium (K), Calcium (Ca), Chromium (Cr), Manganese (Mn), Iron (Fe), Copper (Cu), Zinc (Zn), Selenium (Se), Molybdenum (Mo) and Iodine (I) concentrations and semen parameters [1– 15]. 500 fertile and 1000 infertile males provided a standardized semen specimen. Total Magnesium (Mg), Phosphorus (P), Potassium (...
background the altered levels of some essential trace elements and antioxidant minerals have been observed in diabetic patients. objectives the aim of the present study was to compare the concentrations of essential trace elements, copper (cu), zinc (zn), and iron (fe) in the serum of patients who have type 2 diabetes mellitus (t2dm) with those of their non-diabetic first-degree relatives (fdr)...
We analyse a sample of 24 damped Lyman-α (DLA)/moderate DLA systems at intermediate redshifts, 0.3 < zabs < 2.2, all with measurement of the weak Mn ii absorption lines, to investigate which elemental ratios could possibly be used as tracers of either dust depletion or nucleosynthesis effects. We applied a component-bycomponent analysis to the five systems of the sample with new observations an...
Efforts to develop metallic zinc for biodegradable implants have significantly advanced following an earlier focus on magnesium (Mg) and iron (Fe). Mg and Fe base alloys experience an accelerated corrosion rate and harmful corrosion products, respectively. The corrosion rate of pure Zn, however, may need to be modified from its reported ~20 μm/year penetration rate, depending upon the intended ...
Pot and field experiments were done to establish the effect of Rhizobium inoculation, Molybdenum and lime supply on the availability of micronutrients (Cu, Zn, Mn, Fe, B and Mo) in Phaseolus vulgaris L. In both field and pot experiments, Rhizobium inoculation significantly improved uptake of Mn, Fe, Cu, Zn, B and Mo in all organs (roots, shoots, pods and whole plants) except the Mo uptake in ro...
The aim of our study was to evaluate the mineral composition (Zn, Cu, Ca, Fe, Mg, P) of breast tumor tissue and hair, and to investigate the role of Zn and Cu contents in diet on tumor development, with DMBAinduced rat breast cancer being the experimental model. Female Sprague-Dawley rats were divided into study groups which, apart from the standard diet, were treated with Zinc ions (Zn) or Cop...
We present new, comprehensive sets of elemental abundances for seven damped Lyα systems (DLAs) in the redshift range z abs = 1.8 − 2.5. These were derived from UVES/VLT spectra combined with existing HIRES/Keck spectra. We detected 54 metal-line transitions, and obtained the column density measurements of 30 ions from 22 elements, Together with the four DLAs analyzed in Dessauges-Zavadsky et al...
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