Bloch and Rittenberg (1, 2) have reported that deuterio-nn-alanine and acetylamino acids labeled with deuterium in the acetyl group give rise to a large isotope concentration in the acetyl groups of amines containing an a-hydrogen atom, in contrast to amines not having an a-hydrogen atom. With deuterioacetic acid itself, no such difference in the acetylation of the two types of foreign amines w...

The current study describes the taxonomic and functional composition of metagenomic sequences obtained from a filamentous microbial mat isolated from the Comau fjord, located in the northernmost part of the Chilean Patagonia. The taxonomic composition of the microbial community showed a high proportion of members of the Gammaproteobacteria, including a high number of sequences that were recruit...

A dodecazinc silicotungstate K(20)Na(2)[Zn(6)(OH)(7)(H(2)O)(Si(2)W(18)O(66))](2)·34H(2)O (1) has been synthesized and characterized by X-ray crystallography, elemental analysis, infrared, UV-vis spectroscopy, cyclic voltammetry, acid-base titration, and DFT calculations. The twelve zinc atoms between the two [Si(2)W(18)O(66)](16-) frameworks make this complex more stable hydrolytically than the...

In this paper, we present the association of audio and video signatures for short video clip detection. First, we present an audio signature based on the spectral flatness measure. Then we describe a spatio−temporal video signature, based on the evolution of gray level centroids over time. The major contribution of this work is the association of these two signatures in a so−called audio−visual...

The compatibility between gold(I) catalysts and amine transaminases has been explored to transform racemic propargylic alcohols into enantioenriched allylic amines in a straightforward selective manner. synthetic approach consists of gold(I)-catalysed Meyer-Schuster rearrangement series 2-arylpent-3-yn-2-ols subsequent stereoselective enzyme-catalysed transamination the resulting α,β-unsaturate...