Catalyzes Heterogeneous
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Tratamento de residuos organoclorados toxicos : avaliação das condições experimentais para a hidrodescloração do pentaclorofenol com catalisadores de paladio
Concerns with environmental pollution have changed most intensively since Industrial Revolution. At the beginning, environmental pollution was faced as a simple effect of the progress of humanity, but lately, it has been considered a terrible global problem. Nowadays, severe legislation for environmental pollution control has given rise to a great variety of
Publicado em: 2004
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2. Heterogeneous platinum-catalyzed hydrogenation of dialkyl(diolefin)platinum(II) complexes: A new route to platinum surface alkyls
Platinum metal catalyzes the reduction of dialkyl(diolefin)platinum(II) complexes by dihydrogen to alkanes and platinum(0). The reaction involves adsorption of the platinum(II) complex on the platinum(0) catalyst surface with conversion of the alkyl moieties to platinum surface alkyls; these appear as alkane products. The platinum atom originally present in
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3. RecA protein promotes rapid RNA-DNA hybridization in heterogeneous RNA mixtures.
The nucleoprotein filament formed by the RecA protein of Escherichia coli on single-stranded DNA catalyzes the hybridization of RNA transcripts with single-stranded DNA sequences at 37 degrees C, in vitro. RecA protein rapidly promotes hybridization, even when noncomplementary RNA is in a millionfold nucleotide excess over hybridizing RNA, and in a thousandf
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4. Heterogeneous nuclear ribonucleoprotein A1 catalyzes RNA.RNA annealing.
Within the nucleus, pre-mRNA molecules are complexed with a set of proteins to form heterogeneous nuclear ribonucleoprotein complexes. A1, an abundant RNA binding protein present in these complexes, has been shown to bind selectively to single-stranded RNAs and destabilize base-pairing interactions. In this study.A1 is shown to promote the rate of annealing
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5. Binding of E. coli DNA photolyase to a defined substrate containing a single T mean value of T dimer.
The E. coli DNA photolyase is a flavoprotein that catalyzes the photoreversal of pyrimidine dimers. The enzyme binds to DNA containing pyrimidine dimers in a light-independent step and repairs the dimer upon absorbing a photon in the 300-600 nm range. The rate and equilibrium constants for the light-independent reaction were determined before, using randomly
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6. Rapid formation of large molecular weight alpha-polymers in cross-linked fibrin induced by high factor XIII concentrations. Role of platelet factor XIII.
After fibrin polymerization, activated Factor XIII catalyzes the formation of intermolecular cross-links between gamma-chain pairs and also among two or more alpha-chains to form polymers. In this report we characterize the size and heterogeneity of alpha-chain polymers, establish the role of high concentrations of Factor XIII in determining the extent and r
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7. RecA-like proteins are components of early meiotic nodules in lily
Early meiotic nodules (also called recombination nodules) are proteinaceous structures about 100 nm in diameter that are associated with forming synaptonemal complexes (SCs) during early prophase I of meiosis. Although their function is unknown, early nodules may be involved in searching for DNA homology before synaptic initiation. Two potential components o
The National Academy of Sciences of the USA.
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8. Recombinant human hepatitis B virus reverse transcriptase is active in the absence of the nucleocapsid or the viral replication origin, DR1.
The double-stranded DNA genome of hepatitis B virus (HBV) is reverse transcribed from the viral pregenome RNA template by a virally encoded reverse transcriptase enzyme (RT) that possesses both priming and elongation activities. Prior efforts have failed to express an active form of HBV RT outside the nucleocapsid in animal cells or to release it from viral