نتایج جستجو برای: h2o
تعداد نتایج: 16651 فیلتر نتایج به سال:
This paper investigates the effects of subcooling the condenser outlet refrigerant in a compression refrigeration by an absorption refrigeration in an integrated refrigeration system from energy view point. For this purpose the thermodynamic system is analyzed, base on the mass and energy equation and also the effects of operating parameters such as prime mover, ambient temperature and evaporat...
در این کار تحقیقاتی هفت ترکیب به فرمول های شیمیایی زیر تهیه شده و مورد مطالعه قرار گرفته است: [bah]4[(pydch)2(pydc)].pydch2 (1) 4h20 .](h2o)(oh)(pydc)(pydch2)ca][3(pydch)ca][2-meimh2] (2) [in(pydc)(h2o)3]2.pydch2 (3) [sb(pydc)(pydch)(h2o)] (4) [bah]2[zr(pydc)3]. h2o (5) [d-meamh][in(pydc)2(h2o)2] (6) [1-meimh][ca(pydch2)(pydc)(h2o)2][ca(pydch)3].4h2o(7) ترکیب (1) محصول واکنش ترکیب...
The reaction of 3-(2,4-dicarboxyphenyl)-2,6-pyridinedicarboxylic acid (H4dppd) with rare earth nitrates under hydrothermal conditions generated a series of new two-dimensional (2D) coordination polymers, namely {[La(Hdppd)(H2O)2·(H2O)2]n (1), [Ln2(Hdppd)2(H2O)4·(H2O)3]n [Ln = Sm (2), Eu (3)] and [Ln(Hdppd)(H2O)3·H2O]n [Ln = Gd (4), Tb (5), Dy (6), Ho (7), Er (8)] [Hdppd = 3-(2,4-dicarboxyphenyl...
Treatment of the 2,5-bis(2'-pyridyl)pyrrolato (PDP-) anion with {Ru(COD)Cl2}n in THF readily yielded [Ru(PDP)(COD)Cl] (1) in almost quantitative yield. Anion metathesis of 1 in organic solvent by NO3- and OTf- (OTf- = triflato) gave [Ru(PDP)(COD)(NO3)] (2) and [Ru(PDP)(COD)(OTf)] (3), and in aqueous solution by BF4- and PF6- afforded aqueous complexes [Ru(PDP)(COD)(H2O)](BF4) (4+·BF4-) and [Ru(...
Die Leitideen der Diagnose und individuellen Förderung sind in den vergangenen Jahren nicht nur in den Blickpunkt der bildungswissenschaftlichen und fachdidaktischen Forschung gerückt, sondern haben bereits Eingang in einige lehrerbildende Studiengänge genommen. Ein Beispiel hierfür stellt das Projekt dortMINT dar, das im Rahmen der Exzellenzinitiative ” MINT-Lehrerbildung“ von der Deutsche Tel...
The simplest derivative of 2-(hydroxyimino)carboxylic acids, glyoxilic acid oxime (gaoH2), was used as a model compound for investigation of the metal-ligand interactions in a series of metal complexes: Cu(gaoH)2(H2O)2, Zn(gaoH)2(H2O)2, Co(gaoH)2(H2O)2, Ni(gaoH)2(H2O)2, [Cd(gaoH)2(H2O)2]H2O, K[Pd(gao)(gaoH)] and K[Pt(gao)(gaoH)]3/4H2O. The coordination abilities of the active ligand forms, gaoH...
Multi-photon ionization experiments have been carried out on thymine-water clusters in the gas phase. Metastable H2O loss from T (H2O)n was observed at n ≥ 3 only. Ab initio quantum-chemical calculations of a large range of optimized T(H2O)n conformers have been performed up to n = 4, enabling binding energies of water to be derived. These decrease smoothly with n, consistent with the general t...
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