نتایج جستجو برای: po4
تعداد نتایج: 2717 فیلتر نتایج به سال:
Dicaesium bis-muth(III) phosphate(V) tungstate(VI), Cs(2)Bi(PO(4))(WO(4)), has been synthesized during complex investigation in a molten pseudo-quaternary Cs(2)O-Bi(2)O(3)-P(2)O(5)-WO(3) system. It is isotypic with K(2)Bi(PO(4))(WO(4)). The three-dimensional framework is built up from [Bi(PO(4))(WO(4))] nets, which are organized by adhesion of [BiPO(4)] layers and [WO(4)] tetra-hedra above and ...
Step 2 Phosphating The metal is treated with phosphoric acid, leading to the following two reactions occuring in the zinc-rich surface of the steel: 2H3PO4 + 3Zn → 3H2 + Zn3(PO4)2 2H3PO4 + Fe + 2Zn → 3H2 + FeZn2(PO4)2 This gives a mixture of zinc phosphates. The electrocoat paint binds better to these zinc phosphates than to the steel alone, and the zinc phosphates corrode much slower than the ...
The Woodman Point Wastewater Treatment Plant (WWTP) in Western Australia has experienced two separate problems causing avoidable maintenance costs: the build-up of massive struvite (MgNH4PO4. 6H2O) scaling downstream of the anaerobic digester and the formation of hydrogen sulfide (H2S) levels in the digester gas to levels that compromised gas engine operation and caused high operating costs on ...
The thermophilic, gram-positive bacterium Thermoterrabacterium ferrireducens coupled organotrophic growth to the reduction of sparingly soluble U(VI) phosphate. X-ray powder diffraction and X-ray absorption spectroscopy analysis identified the electron acceptor in a defined medium as U(VI) phosphate [uramphite; (NH4)(UO2)(PO4) . 3H2O], while the U(IV)-containing precipitate formed during bacter...
A water-stable solid electrolyte is a key material without which aqueous lithium–air batteries could not be operated. In this study, we have examined the electrical conductivity and mechanical properties of a water-stable lithium-ion-conducting solid electrolyte, Li1+xAlxGeyTi2−x−y(PO4)3 with the NASICON-type structure, as a function of the Al and Ge content. Li1+xAlxGeyTi2−x−y(PO4)3 was synthe...
We report magnetization and specific-heat measurements on polycrystalline samples of BaCdVO PO4 2 and show that this compound is a S=1 /2 frustrated square lattice with ferromagnetic nearest-neighbor J1 and antiferromagnetic next-nearest-neighbor J2 interactions. The coupling constants J1 −3.6 K and J2 3.2 K are determined from a fitting of the susceptibility data and confirmed by an analysis o...
The chloroapatite Eu5(PO4)3Cl has been synthesized by a solid-state reaction route using a salt flux. Its structure has been solved and refined from single crystal X-ray data: apatite type, P63/m, a = 988.36(4), c = 720.32(3) pm, Z = 2, R(F) = 0.021 and wR(F2) = 0.063 for 748 unique reflections and 40 variables. The Eu5(PO4)3Cl structure contains isolated (PO4)3− tetrahedra and two crystallogra...
The title compound, tetra-potassium tetra-[nickel(II)/iron(III)] penta-kis-(orthophosphate), K3.84Ni0.78Fe3.19(PO4)5, has been obtained from a flux. The structure is isotypic with that of K4MgFe3(PO4)5. The three-dimensional framework is built up from (Ni/Fe)O5 trigonal bipyramids with a mixed Fe:Ni occupancy of 0.799 (8):0.196 (10) and isolated PO4 tetra-hedra, one of which is on a general pos...
Src homology 2 (SH2) domains are composed of weakly conserved sequences of ∼100 aa that bind phosphotyrosines in signaling proteins and thereby mediate intra- and intermolecular protein-protein interactions. In exploring the mechanism whereby tyrosine phosphorylation of the erythrocyte anion transporter, band 3, triggers membrane destabilization, vesiculation, and fragmentation, we discovered a...
: ترکیبات 2، 4، 5- تری فنیل- 1h- ایمیدازول و 3 و 4- دی هیدروپیریمیدین- 2- (1h)- اون دارای فعالیت های ضد باکتریائی، ضد قارچی و ضد ویروسی بوده، خواص درمانی و شفابخشی دارند و به-سبب فعالیت های بیولوژیکی گسترده و کاربرد در شیمی سنتزی، مورد توجه هستند. در این پایان نامه قابلیت کاتالیزوری ترکیباتی به فرمول کلی[(x=k,nh4,na,…) m,n=0,1,2] hm po4 xn در سنتز این محصولات بررسی گردید. این مواد بر روی بستره...
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