Molecular interaction between nucleic acid bases and amino acids is a fundamental process in biology. The adsorption of the molecules on surfaces provides the opportunity to study such interactions in great detail by exploiting the high-resolution imaging capabilities of scanning tunnelling microscopy (STM). The chemisorption of prochiral molecules, such as adenine, on a metal surface causes th...

Two microfluidic systems have been developed for specific analysis of L-glutamate in food based on substrate recycling fluorescence detection. L-glutamate dehydrogenase and a novel enzyme, D-phenylglycine aminotransferase, were covalently immobilized on (i) the surface of silicon microchips containing 32 porous flow channels of 235 mum depth and 25 mum width and (ii) polystyrene Poros beads wit...

Elevated levels of extracellular glutamate ([Glu]o) cause uncontrolled Ca2+ increases in most neurons and are believed to mediate excitotoxic brain injury following stroke and other nervous system insults. In the normal brain, [Glu]o is tightly controlled by uptake into astrocytes. Because the vast majority of primary brain tumors (gliomas) are derived from astrocytes, we investigated glutamate...

The conversion of rac -phenylglycinonitrile by different variants the nitrilase from Pseudomonas fluorescens EBC191 (EC 3.5.5.1) was studied and amounts chiral composition formed phenylglycine amide compared. Muteins that converted to extraordinarily high or were tested for chemoenzymatic enantioselective one-pot synthesis ( R )- S )-phenylglycine amide. combined initial step in traditional che...

previous studies indicated that endurance exercise decreases levels of liver enzymes. the aim of this study was to determine the effect of endurance exercise on liver enzymes in eight weeks in iranian women who are stopping the drug with methadone. sixty iranian women prisoners including 30 cases as experimental group and 30 volunteers served as control. the mean age, height, weight, percent of...

Background: Polycyclic aromatic hydrocarbons (PAHs) such as phenanthrene (Phe) represent one of the most abundant forms of organic pollutants. The aim of this study was to assess changes in plasma levels of aminotransferase enzymes, total protein and liver tissue as biomarkers of yellowfin seabream (Acanthopagrus latus) exposed to Phe for 14 d. Methods: The research was carried out in Januar...

INTRODUCTION Type 3 dengue virus caused an extensive epidemic in the state of Rio de Janeiro in summer 2002. In some of the patients, it was found in an atypical form with increased aminotransferase levels and acute hepatitis. MATERIAL AND METHODS An analysis was made of 1,585 serologically confirmed dengue cases at the Dengue Reference Center in Campos dos Goytacazes, Rio de Janeiro state. T...