Zinc (Zn) serves as a cofactor in several extracellular phosphatases, which allow microorganisms to acquire phosphorus from organic P compounds. In oligotrophic ocean water, where both phosphate and Zn concentrations are low, orthophosphate regeneration through enzymatic hydrolysis of organic compounds may be restricted by Zn availability. We examined the possibility of co-limitation by P and Z...

background: cadmium (cd) is a heavy metal that has widespread use. it enters the food chain in different ways, including soil and water. cadmium can cause dysfunction of different body organs. zinc (zn) and magnesium (mg) supplementation can have protective effects against cadmium toxicity due to their antagonistic and antioxidants properties. this study examines the influence of supplemental z...

The vacuolar Zn(2+)/H(+) antiporter of Arabidopsis thaliana, AtMTP1, has a cytosolic histidine-rich loop (His-loop). We characterized the structures and Zn(2+)-binding properties of the His-loop and other domains. Circular dichroism analyses revealed that the His-loop partly consists of a polyproline type II structure and that its conformational change is induced by Zn(2+) as well as the C-term...

Supplemental zinc as ZnO is routinely added to nursery pig diets at 15 to 20 times the nutritional requirement to alleviate physiological stress and enhance performance. The mechanism by which Zn accomplishes this function is unknown, however, high concentrations of Zn are excreted in the environment at undesirable levels. To study Zn uptake, we developed a multi-stage digestion model followed ...

OBJECTIVE This study aimed to analyze the agricultural soils from different regions in Saudi Arabia for cobalt and related metals as Cu(2+), Ni(2+), Cr(3+), Zn(2+) and Pb(2+). MATERIALS AND METHODS Liver and muscle tissues of livestock grazing on the selected areas were analyzed for the content of Co and vitamin B12. RESULTS Our results indicated that the levels of Co in surface soil (0-15 ...

Electrodeposition and characterization of novel ceria-doped Zn-Co composite coatings was the main goal this research. Electrodeposited were compared to pure obtained under same conditions. The effect two ceria sources, powder home-made sol, on morphology corrosion resistance determined. During electrodeposition process plating solution successfully agitated in an ultrasound bath. source particl...

The adsorption capacity and selectivity of carbon dioxide and nitrogen at 298 K have been evaluated for two series of MMOFs built on metal paddle-wheel building units, including non-interpenetrated Zn(BDC)(TED)(0.5) (1), Zn(BDC-OH)(TED)(0.5) (2), Zn(BDC-NH(2))(TED)(0.5) (3), and interpenetrated Zn(BDC)(BPY)(0.5) (4), Zn(BDC)(DMBPY)(0.5) (5), Zn(NDC)(BPY)(0.5) (6) and Zn(NDC)(DMBPY)(0.5) (7) fra...

The syntheses, structures, and magnetic properties of a series of tetranuclear cyanide-bridged compounds are reported. This family of molecular squares, [{M(II)Cl2}2{Co(II)(triphos)(CN)2}2] (M = Mn ([CoMn]), Fe ([CoFe]), Co ([CoCo]), Ni ([CoNi]), and Zn ([CoZn]), triphos = 1,1,1-tris(diphenylphosphinomethyl)ethane), has been synthesized by the reaction of Co(II)(triphos)(CN)2 and MCl2 (M = Mn, ...

the concentrations of some heavy metals in sediment from the sinop coasts of the black sea were measured to monitor metal pollution in 2013. the distribution of the heavy metals in sediments of the black sea shows a variable pattern. the objectives of the present study were to elucidate the distribution heavy metals such as cu, pb, zn, ni, mn, fe, as, cd, cr, hg and co in sediment from sinop co...

The formation of the icosahedral phase (I-phase) as a secondary solidification phase in Mg-Zn-Y and Mg-Zn-Al base systems provides useful advantages in designing high performance wrought magnesium alloys. The strengthening in two-phase composites (I-phase + α-Mg) can be explained by dispersion hardening due to the presence of I-phase particles and by the strong bonding property at the I-phase/m...