octolig® and metal derivatives of octolig®
Alkoxo and Aryloxo Derivatives of Metals Elsevier ppt
... x D valency of metal, L D neutral donor ligand, X D halide, and n, y and z are integers) The discussion will generally exclude organometallic alkoxides and a considerable range of metal- organic ... production96 of alkoxides of Y, Ti, Zr, Nb, Ta, Mo, W, Cu, Ge, Sn, and other metals Homometallic Alkoxides 2.3 19 Reactions of Metal Atom Vapours with Alcohols (Method C) Although the development of metal ... synthesis of a wide range of organometallic compounds (many of which were inaccessible by conventional techniques),97 the use of this technique for the synthesis of metal alkoxides and related derivatives...
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Synthesis and reactivity studies of cyclopentadienyl derivatives of ruthenium iridium and osmium iridium mixed metal clusters 5
... completion of reaction of 3c; reducing the ratio of TMNO or Ph3PSe resulted in recovery of large amount of unreacted 3c This evidently points to the subsequent reactions of 23 or the formation of 3c ... IrOs3 metal core with the iridium at one of the wingtips, and a telluride bridging each of the two Os-Os of the Os3 wing Besides the Cp*, the iridium also carries a carbonyl group Clusters 27 and ... plates The 1H NMR spectra of 27, 28 and 29 showed two resonances each at high field, indicative of bridging metal hydrides Two methyl signals were observed for 27 and 29 and one for 28, consistent...
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Synthesis and reactivity studies of cyclopentadienyl derivatives of ruthenium iridium and osmium iridium mixed metal clusters 1
... introduction to ligands and substrates As the focus of the research is on the synthesis and reactivity of mixed metal carbonyl clusters, a short review of some of the ligands like CO, hydrides, and cyclopentadienyls ... chemistries of the trinuclear and tetranuclear clusters of the heavier groups and metals will be useful to gain a better understanding of their heteronuclear clusters 1.3.1 Trinuclear clusters of osmium ... pre-formed cluster anions and mono- or di-nuclear metal cations Clegg and coworkers have reported the synthesis of penta and hexanuclear mixed -metal clusters Os4Rh(μ-H2)(CO)13 and Os4Rh2(μ-H)2(CO)11(η5-Cp*)2...
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Synthesis and reactivity studies of cyclopentadienyl derivatives of ruthenium iridium and osmium iridium mixed metal clusters 2
... Chung, and S.G Shore, Journal of Organometallic Chemistry, 1992, 426, 121 D.Y Jan, L.Y Hsu, W.L Hsu, and S.G Shore, Organometallics, 1987, 6, 274 10 S.Y.-W Hung, and W.-T Wong, Journal of Organometallic ... Ahlgren, T.A Pakkanen, and J Pursiainen, Journal of Organometallic Chemistry, 1997, 530, 191 J.R Galsworthy, C.E Housecroft, D.M Matthews, R Ostrander, and A.L Rheingold, Journal of the Chemical Society, ... gave one major band and two minor bands Band gave orange crystals of Cp*IrOs2(CO)9, 8, (trace amount) identified by comparison with the X-ray, IR, 1H NMR and MS data reported [25] Band gave unreacted...
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Synthesis and reactivity studies of cyclopentadienyl derivatives of ruthenium iridium and osmium iridium mixed metal clusters 3
... disposed parallel to the “hinge” metal metal bond of the butterfly, and the alkyne interacts with all four metal atoms Wing tip metal atoms C π π M π C σ σ M' M π M Hinge metal atoms Figure 3.1 M3M’C2 ... of clusters 10a and 10b were carried out and the reaction afforded 11a and 11b, thus confirming that the former were the precursors to the latter Furthermore, photolysis of solutions of 10a and ... Thermolysis or photolysis of 10a and 10b did not yield the triruthenium clusters 12a and 12b, which suggested that 10a and 10b were not their precursors and that the formation of 12a and 12b probably...
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Synthesis and reactivity studies of cyclopentadienyl derivatives of ruthenium iridium and osmium iridium mixed metal clusters 4
... Bruce and coworkers who determined the structures of 12 different monoand disubstituted phosphine derivatives of Ru3(CO)12 and Os3(CO)12 to investigate the steric and electronic influences of phosphine ... number of tBuNC ligands Isocyanides are stronger σ-donors and weaker π-acceptors compared to a carbonyl 155 4.3.2 Reaction of 3c with pyridine The activation of C-H and N-H bonds of aromatic and ... TLC plates yielded a red band of Cp*IrOs3(μ-H)2(CO)9(PPh3), 17a, (50 mg, 69%) and another red band of Cp*IrOs3(μH)2(CO)8(PPh3)2, 18a, (12 mg, 14%) A series of derivatives of 3c were prepared by...
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Numerical simulation and performance test of metal hydride hydrogen storage system
... filtration and D=0.00237 is for LaNi5 The term ε and d are the porosity of metal hydride and average diameter of metal hydride particle, respectively In & the meanwhile, Jf is hydrogen flux and determined ... where K and E are effective thermal conductivity in metal hydride and heat of formation of hydride, respectively The two equations (16) and (19) are the simplified mathematical model of metal hydride ... requirements of metal hydride materials in storage capacity and kinetic behavior, the strict demands also put on the reactor design There are four major concerns of the design of metal hydride...
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Photodegradation and removal of phenol and phenolic derivatives from petroleum refinery wastewater using nanoparticles of TiO2
... expanded since the discovery of the photocatalytic properties of TiO2 and the demonstration of its effectiveness to generate hydroxyl radicals in the presence of UV light [8] The more activity of ... treatment using nanoparticles of TiO2 and UV light The main feature of this work is the use of inexpensive and recoverable catalyst This sort of processes for degradation of organic compounds may ... black run) and with UV light (both with 100 mg L−1 of TiO2, and temperature of 303 K) Figure shows, very low reduction of COD which was found in the absence of light The increase of temperature...
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Tài liệu Báo cáo Y học: Short peptides are not reliable models of thermodynamic and kinetic properties of the N-terminal metal binding site in serum albumin doc
... values) of Ni(II) and Cu(II) complexes of peptides at I = 0.1 M (KNO3) and 25 C Standard deviations on the last digits are given in parentheses EPR The X-band EPR spectra of Cu(II) complexes of VIHN ... kinetics of metal binding to peptides and their exchange was studied in 100 mM Tris/HCl and in 100 mM phosphate buffers, both at pH 7.4 RESULTS Complexation of Cu(II) and Ni(II) by model peptides and ... complexes of VIHN [11] and the DAHam complexes of Cu(II) and Ni(II) [31] were studied previously Tables and thus present only the novel data: protonation constants for DAHKam and VIHN, and stability...
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Báo cáo khoa học: Caenorhabditis elegans metallothionein isoform specificity – metal binding abilities and the role of histidine in CeMT1 and CeMT2 potx
... range of 0.5–2 · 10)4 m for Zn– and Cd–CeMT, and 0.5–1 · 10)4 m for Cu–CeMT, indicating an average of mg of pure metal MT complex in L of E coli culture Zn(II)-binding abilities of CeMT1 and CeMT2 ... the number of CeMT1 and CeMT2 histidines contributing to divalent metal ion coordination, the Zn and Cd preparations of both C elegans CeMT1 and CeMT2, and the Cd complexes of CtCeMT1 and CtCeMT2, ... Call2 and CalliCu, Callinectes sapidus, 1, and Cu isoforms (Uniprot accession numbers Q548Y3, Q548Y2 and Q9U620, respectively); Scy1 and Scy2, Scylla serrata isoforms and (Uniprot P02805 and P02806);...
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Báo cáo khoa học: Isoquinoline-1,3,4-trione and its derivatives attenuate b-amyloid-induced apoptosis of neuronal cells pdf
... isoquinoline-1,3,4-trione and its derivatives protected the growth of axons and dendrites of neurons treated with Ab(25–35) and attenuated neuronal apoptosis Moreover, the protection afforded by the derivatives of ... Isoquinoline-1,3,4-trione and derivatives inhibit caspase-3 irreversibly The reversibility of inhibition is easily determined by measuring the recovery of enzymatic activity after a rapid and large dilution of the ... indicative of an apoptosis ratio of 4.73% As the duration of treatment increased to 48 and 72 h, the ratio increased to 19.91% and 31.71% In contrast, apoptosis ratios were 4.01% and 4.09% when...
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A meta analysis and risk assessment of heavy metal uptake in common garden vegestable
... hyperkeratosis and the formation of hyperkeratotic warts and corns on the palms and the soles of the feet are caused by chronic arsenic ingestion Discoloration of the skin of the face, neck, and back ... immobilization of heavy metals, and there is very little leaching through the soil profile (Khan and Frankland 1983) Immobilization can increase the Cd concentration of the soil and ultimately ... in heavy metal uptake (Khan and Frankland 1983) Soil pH significantly influences heavy metal concentrations in both soil and plant tissues The effect of soil pH on mobility of heavy metals is...
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Báo cáo khóa học: Mutational and structural analysis of cobalt-containing nitrile hydratase on substrate and metal binding pdf
... mutant, and Fe-type NHase are shown in yellow, red and cyan, respectively The Cc2 atom of aThr109 and the Cc1 atom of aVal136 of the Co-type NHase are connected by a yellow line (B) Vicinity of aTyr114 ... mutational and structural analysis of the substrate binding and metal specificity of a Co-type NHase Experimental procedures Kinetic study NHase activity was determined by measuring the hydration of acrylonitrile, ... mutated residue in the aT109S and aY114T structures, and a cobalt atom and three oxygen atoms in the apoenzyme and aY114T structures Several rounds of refinement and model Ó FEBS 2003 432 A Miyanaga...
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the role of morphology and crystallographic structure of metal oxides
... effects of metal oxide doping include formation of p–n junctions, the appearance of transitional areas and layers acting as catalytic filters, the changes in the valency of metal state, and others ... basis of such materials, it is necessary to expand our understanding of gas sensor mechanism in nanoand polycrystalline oxides For example, it is necessary to establish the role of morphology and ... There are the works of Yamazoe and coworkers in the field of ceramic type sensors [26,44,56–62], in which a direct correlation between grain size of metal oxides and gas sensitivity of conductometric...
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Báo cáo khoa học: Characterization of recombinant prolidase from Lactococcus lactis – changes in substrate specificity by metal cations, and allosteric behavior of the peptidase pdf
... relationships of prolidase, hence providing a greater understanding of the characteristics of this peptidase, which would be of industrial use in the debittering of fermented foods Results and Discussion ... site (His292, Tyr329 and Arg337; green), and substrate size-limiting residues (Pro306, Ser307 and Ile308; orange) and metal- chelating residues (Asp221, Asp232, His296, Glu325 and Glu339; cyan) are ... that of Lb casei prolidase [11] and higher than that of Lb delbrueckii prolidase [4] This loss of activity in the recombinant Lc lactic prolidase was most likely due to denaturation between 60 and...
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Báo cáo khoa học: Comparative metal binding and genomic analysis of the avian (chicken) and mammalian metallothionein potx
... characterization of the ckMT, ackMT and bckMT metal complexes Spectroscopic (UV-Vis) and spectropolarimetric (CD) analysis of the metal ckMT clusters and of the species formed in vitro during the Zn ⁄ Cd and ... Fernando LP & Andrews GK (1989) Cloning and expression of an avian metallothionein-encoding gene Gene 81, 177–183 Fernando LP, Wei D & Andrews GK (1989) Structure and expression of chicken metallothionein ... al Chicken metallothionein Results and discussion Zn(II) and Cd(II) binding abilities of ckMT and its separate domains Metal binding analysis rationale The metal binding abilities of ckMT were...
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Báo cáo khoa học: Autophosphorylation of Archaeoglobus fulgidus Rio2 and crystal structures of its nucleotide–metal ion complexes pptx
... ATP and its analogs bind between the two lobes and, in most cases, the presence of a ligand results in a movement of one lobe relative to the other This is seen in structures of Rio2 as well, and ... A) and is within 2.32 A of both metal ions Rio2 binds ATP in a different conformation from typical serine ⁄ threonine or tyrosine kinases such as Fig Active site of Rio2 with ATP and ADP and metal ... Nucleotide metal ion complexes of Rio2 N LaRonde-LeBlanc et al Fig ATP conformation is unique in Rio2 Alignment of the catalytic loop and the metal- binding loop of Rio2 (green) with that of PKA (pink;...
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Báo cáo hóa học: " Investigation of cracks in GaN films grown by combined hydride and metal organic vaporphase epitaxial method" ppt
... manuscript XL, SY, QZ and ZW directed the experiments and the drafting of the paper CL and YG participated the growth of material ZL and XX carried out the measurement of Raman TY and HW carried out ... hs (5) where hf and hs are the thicknesses of the film and the substrate and their values are 22 and 430 μm, respectively z is the distance from the bottom of the substrate Ms and Mf are the elastic ... principle, k and ε0 can be obtained by ∂V/∂ε0 = and ∂V/∂k = 0, We defined r as the weighted ratio of elastic constant of the film and the substrate r= (4) Mf h f Ms h s and Troom where af(T) and as(T)...
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báo cáo hóa học:" Research Article Derivatives of Orthonormal Polynomials and ´ Coefficients of Hermite-Fejer Interpolation " docx
... estimations of higher-order derivatives of pn,ρ x at the zeros of pn,ρ x in a certain finite interval for two cases of an odd order and of an even order In addition, we estimate the higher-order derivatives ... induction with respect to m Proof of Theorem 4.3 It is proved by the same reason as the proof of Corollary 3.4 Journal of Inequalities and Applications 25 Proof of Theorem 4.4 To prove the result, ... polynomials based at the zeros of pn,ρ x More precisely, we will estimate the higher-order derivatives of pn,ρ x at the zeros of pn,ρ x for two cases of an odd order and of an even order These estimations...
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