Dynamic Kinetic Resolution
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Study of kinetic resolution of secondary alcohols by enantioselective oxidation mediated by bacteria / Estudo de resolução cinética de álcoois secundários utilizando reação de oxidação enantiosseletiva mediada por bactérias
Nesta dissertação de mestrado foram estudadas duas bactérias, Sphingobacterium sp e Arthrobacter atrocyaneus, produtoras de enzimas álcool desidrogenases que se mostraram capazes de catalisar reações de oxidação enantiosseletiva de alcoóis secundários racêmicos. Inicialmente foram avaliados alguns parâmetros para a realização da resolução cin
Publicado em: 2010
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2. Scaling laws in PZT thin films grown on Si(001) and Nb-Doped SrTiO3(001) substrates
A dynamic scaling and kinetic roughening study was done on digitized atomic force microscope (AFM) images of Pb(Zr0.52,Ti0.48)O3 (PZT) thin films. The films were grown on Si(001) and Nb - SrTiO3(001) (STNO) substrates via rf-sputtering technique at high oxygen pressures at substrate temperatures of 600 ºC by varying the deposition time and keeping other gro
Brazilian Journal of Physics. Publicado em: 2006-09
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3. New theoretical and observational results on transverse magnetic fluctuations near the magnetopause
Electromagnetic ion cyclotron waves in the plasma depletion layer measured by Wind on three inbound passes of the magnetosheath near the stagnation streamline are modeled using theoretical results from Gnavi et al., J. Geophys. Res., 105, 20973, 2000. The kinetic dispersion relation in a plasma composed of electrons, protons, and alpha particles, is solved w
Brazilian Journal of Physics. Publicado em: 2004-12
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4. Exocytotic mechanism studied by truncated and zero layer mutants of the C-terminus of SNAP-25
The highly conserved SNARE proteins, SNAP-25, syntaxin and synaptobrevin, form a tight ternary complex, which is essential for exocytosis. Crystallization of this complex revealed a four-helix bundle with an unusual hydrophilic layer (zero layer) in its center. In order to evaluate the role of this layer in different kinetic components of secretion, we used
Oxford University Press.
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5. High intranuclear mobility and dynamic clustering of the splicing factor U1 snRNP observed by single particle tracking
Uridine-rich small nuclear ribonucleoproteins (U snRNPs) are components of the splicing machinery that removes introns from precursor mRNA. Like other splicing factors, U snRNPs are diffusely distributed throughout the nucleus and, in addition, are concentrated in distinct nuclear substructures referred to as speckles. We have examined the intranuclear distr
The National Academy of Sciences.
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6. The first step in vision occurs in femtoseconds: complete blue and red spectral studies.
Femtosecond transient absorption measurements of the cis-trans isomerization of the visual pigment rhodopsin clarify the interpretation of the dynamics of the first step in vision. We present femtosecond time-resolved spectra as well as kinetic measurements at specific wavelengths between 490 and 670 nm using 10-fs probe pulses centered at 500 and 620 nm fol