Binuclear System
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Two novel Mg(II)-based and Zn(II)-based complexes: inhibiting growth of human liver cancer cells
Two new Mg(II)-based and Zn(II)-based coordination polymers, {[Mg3(BTB)(DMA)4](DMA)2}n (1, H3BTB=1,3,5-benzenetrisbenzoic acid, DMA=N,N-dimethylacetamide) and {(H2NMe2)2[Zn3(BTB)2(OH)(Im)](DMF)9(MeOH)7}n (2, Im=imidazole, DMF=N,N-dimethylformamide), have been successfully synthesized and structurally characterized under solvothermal conditions. 1 contains a
Braz J Med Biol Res. Publicado em: 18/12/2017
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2. Evaluation of genotoxic and mutagenic effects of aqueous extract from aerial parts of Linaria genistifolia subsp. genistifolia
Genotoxic and mutagenic effects of aqueous extract from aerial parts Linaria genistifolia (L.) Mill. subsp. genistifolia, Plantaginaceae (Lg-ext) were investigated by using both Allium cepa root meristematic cells and bacterial reverse mutation assay in Salmonella typhimurium TA98 and TA100 with or without metabolic activation system (S9), respectively. In A
Revista Brasileira de Farmacognosia. Publicado em: 2012
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3. Ãteres coroa com Ãons lantanÃdeos: de compostos de coordenaÃÃo a novos materiais nanoestruturados de sÃlica
Com o objetivo de desenvolver novos materiais e ligantes, baseados em Ãteres coroa, capazes de coordenarem um ou mais Ãons lantanÃdeos, o presente trabalho mostra a sÃntese de compostos de coordenaÃÃo mono e binucleares, livres ou ligados Ãs matrizes de sÃlica. As caracterizaÃÃes foram realizadas via anÃlise elementar, anÃlise termogravimÃtrica,
Publicado em: 2008
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4. AVALIAÇÃO DE ARRANJOS SUPRAMOLECULARES DE COMPLEXOS TRIAZENIDOS DE MERCÚRIO(II) E COBRE(II) / EVALUATION OF SUPRAMOLECULAR ARRANGEMENTS OF TRIAZENIDE COMPLEXES OF MERCURY(II) AND COPPER(II).
The reaction between deprotonated 1,3-Bis(3-acetylphenyl)triazene and Hg(CH3COO)2 in methanol, yields [Hg(RNNNR)(Py)] (R=3-CH3C(O)C6H4) (1), a triazenide dimeric mononuclear complex of mercury(II). The crystal structure analysis of (1) reveals a bi−dimensional supramolecular arrangement as result of molecular self-assembly provided by Hg−η,
Publicado em: 2007
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5. INVESTIGAÇÃO DE COMPLEXOS BINUCLEARES DE K+ E CU(II) COM LIGANTES 1,3-DIARILTRIAZENIDOS SIMÉTRICOS / COMPLEXES INVESTIGATION BINUCLEARES OF K+ And Copper(II) WITH 1,3-DIARYLTRIAZENES AS LIGANDS SYMMETRICAL
At work present it synthesized and determined itself the molecular structure of a copper complex (II) and another of potassium in which both involve triazenides ligands monocatenados previously deprotonated. The reaction between hydroxide of solid potassium and it pre-ligand 1,3-bis(4-nitrophenyl)triazene, in methanol, originated the triazenide complex [K(O2
Publicado em: 2006
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6. Enhanced rate of intramolecular electron transfer in an engineered purple CuA azurin
The recent expression of an azurin mutant where the blue type 1 copper site is replaced by the purple CuA site of Paracoccus denitrificans cytochrome c oxidase has yielded an optimal system for examining the unique electron mediation properties of the binuclear CuA center, because both type 1 and CuA centers are placed in the same location in the protein whi
The National Academy of Sciences.
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7. Asymmetric autocatalysis: Novel structures, novel mechanism?
The amplifying asymmetric autocatalysis discovered by Soai and coworkers in 1995 does not fit easily into the extensively investigated framework of organozinc alkylation of aldehydes. In that case the catalyst is a monomeric Zn chelate that functions as both Lewis acid and Lewis base, permitting the simultaneous coordination of both dialkylzinc reagent and a
National Academy of Sciences.
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8. Rubrivivax gelatinosus acsF (Previously orf358) Codes for a Conserved, Putative Binuclear-Iron-Cluster-Containing Protein Involved in Aerobic Oxidative Cyclization of Mg-Protoporphyrin IX Monomethylester
This study describes the characterization of orf358, an open reading frame of previously unidentified function, in the purple bacterium Rubrivivax gelatinosus. A strain in which orf358 was disrupted exhibited a phenotype similar to the wild type under photosynthesis or low-aeration respiratory growth conditions. In contrast, under highly aerated respiratory
American Society for Microbiology.
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9. Improved System for Protein Engineering of the Hydroxylase Component of Soluble Methane Monooxygenase
Soluble methane monooxygenase (sMMO) of Methylosinus trichosporium OB3b is a three-component oxygenase that catalyses the O2- and NAD(P)H-dependent oxygenation of methane and numerous other substrates. Despite substantial interest in the use of genetic techniques to study the mechanism of sMMO and manipulate its substrate specificity, directed mutagenesis of
American Society for Microbiology.
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10. Binding of disparate transcriptional activators to nucleosomal DNA is inherently cooperative.
To investigate mechanisms by which multiple transcription factors access complex promoters and enhancers within cellular chromatin, we have analyzed the binding of disparate factors to nucleosome cores. We used a purified in vitro system to analyze binding of four activator proteins, two GAL4 derivatives, USF, and NF-kappa B (KBF1), to reconstituted nucleoso