Buscar recursos académicos

The goal of this paper is twofold. First, we put together, for the first time, quantitative measures on the quality of the corporate governance and the ownership structure for 65 non-financial listed companies in Argenti...

The objective of reducing analysis time and maintaining good efficiency, there has been substantial focus on high-speed chromatographic separations. Recently, commercially available ultra performance liquid chromatograph...

El presente trabajo intenta analizar algunos factores causales que permitieron el llamado "Divorcio de Terciopelo". El mismo puede singularizarse como la pacífica y ordenada desintegración de la Federación Checoslovac...

The project was aimed to develop floating microcapsules (FMs) using combination of a hydrophobic (ethyl cellulose, EC) and hydrophilic polymer (hydroxy propyl methyl cellulose, HPMC), and to evaluate them. An easy and no...

HPLC-DAD was used and validated for the simultaneous determination of five flavonoids (rutin, quercitrin, quercetin, kaempferol and isorahamnetin) in rabbit plasma. Chromatographic separation was performed on an Aglient ...

El arribo de Vicente Fox a la Presidencia de México en diciembre del 2001 generó una serie de expectativas no solo en la población mexicana, sino en la comunidad internacional. El bono democrático que daba sustento a...

A High-Performance Liquid Chromatography method was developed for quantification of benzalkonium chloride (BAC) and separation of three major homologues, in nasal preparations. Chromatography separation was carried out o...

A simple and cost-effective method by capillary zone electrophoresis (CZE) was developed and validated for the simultaneous determination of the antituberculosis drugs isoniazid (INH), pyrazinamide (PYR), and rifampicin...

This paper attempts to explain how the separation of security ownership and control, typical of large corporations, can be an efficient form of economic organization. We first set aside the presumption that a corporation...

A technique has been developed for the separation of proteins by two-dimensional polyacrylamide gel electrophoresis. Due to its resolution and sensitivity, this technique is a powerful tool for the analysis and detection...

Conventional optical components rely on gradual phase shifts accumulated during light propagation to shape light beams. New degrees of freedom are attained by introducing abrupt phase changes over the scale of the wavele...

The carrier collection efficiency (η c ) and energy conversion efficiency (η e ) of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C 60 or its functionalized derivatives. Compos...

We describe a new molecular approach to analyzing the genetic diversity of complex microbial populations. This technique is based on the separation of polymerase chain reaction-amplified fragments of genes coding for 16S...

In the past few years several methods have been developed for the analysis of serum lipoproteins. Lindgren, Elliott, and Gofman (1) have utilized the relatively low density of the lipoproteins to separate them from the o...