In this chapter the results of kinetic studies of the rhodium-catalyzed asymmetric hydrogenation using monodentate phosphoramidite ligands are described. Together with the data obtained by a number of other techniques a mechanism for the Rhcatalyzed asymmetric hydrogenation with MonoPhosTM is proposed. The formation of the catalyst precursor results in a mixture of diastereomeric Rh-complexes w...

An experiment was carried out to evaluate and compare the effects of organic and inorganic selenium (Se) sources on broiler male birds (Ross 308). Uniform broiler male chicks divided in to five groups with six replicates were fed with either normal feed (without supplemental Se, negative control), 0.25 ppm of inorganic Se, 0.5 ppm of inorganic Se, 0.25 ppm of inorganic Se + 0.25 ppm of organic ...

In this article, we present Approximation Schemes for Capacitated Vehicle Routing Problem (CVRP) on several classes of graphs. CVRP, introduced by Dantzig and Ramser in 1959 [ 14 ], are given a graph G=(V,E) with metric edges costs, depot r ∈ V , vehicle bounded capacity Q . The goal is to find minimum cost collection tours the that returns depot, each visiting at most nodes, such they cover al...

Unlike DNA, in addition to the 2'-OH group, uracil nucleobase and its modifications play essential roles in structure and function diversities of non-coding RNAs. Non-canonical U•U base pair is ubiquitous in non-coding RNAs, which are highly diversified. However, it is not completely clear how uracil plays the diversifing roles. To investigate and compare the uracil in U-A and U•U base pairs, w...

In modern warehouses, robots are employed along with humans to perform those jobs that are less productive and unsafe for humans. This paper focuses on the tasks where robots fetch outgoing objects from their respective storage racks and bring them to the packaging dock. This requires a careful task allocation along with route planning such that the total path traveled (cost) by all the robots ...

Received: 06/25/2007 Approved: 12/18/2007 Portugu se / English: www.scielo.br/reeusp RESUMO Este é um estudo exploratório de natureza quantitativa e qualitativa, que avalia o desempenho dos serviços de saúde na execução do DOT no domicílio em um município de grande porte. Para a análise quantitativa foram construídos indicadores que avaliaram a otimização dos recursos materiais/ humanos e a efe...

The synthesis, base-pairing properties and in vitro and in vivo characteristics of 5-methyl-isocytosine (isoC(Me) ) and isoguanine (isoG) nucleosides, incorporated in an HNA(h) (hexitol nucleic acid)-DNA(d) mosaic backbone, are described. The required h-isoG phosphoramidite was prepared by a selective deamination as a key step. As demonstrated by Tm measurements the hexitol sugar showed slightl...

Gold-thiol chemistry is widely used in nanotechnology but has not been exploited in optical-trapping experiments due to laser-induced ablation of gold. We circumvented this problem by using an array of gold nanoposts (r = 50-250 nm, h approximately 20 nm) that allowed for quantitative optical-trapping assays without direct irradiation of the gold. DNA was covalently attached to the gold via dit...