Drosophila melanogaster transformed with the esterase 5 (Est-5) gene from Drosophila pseudoobscura were used to assess the evolutionary basis for differences in the sex- and tissue-specific expression of the esterase 5 (EST 5) enzyme in D. pseudoobscura relative to its homologue in D. melanogaster, EST 6. EST 5 is expressed in the eyes and hemolymph of transformed D. melanogaster just as it is ...

Estrogen sulfotransferase (EST) catalyzes the specific sulfonation of estrogen at the 3'-hydroxyl position using 3'-phosphoadenosine-5'-phosphosulfate as an activated sulfate donor. Sulfonation renders the hormone biologically inactive as well as changing its half-life within the human body. Studies in the rat and mouse have suggested that expression of EST in the liver is age- and sex-dependen...

5 En utilisant la propriété de Markov forte, (Στk+n, n ∈ N) est une chaîne de Markov issue de k de matrice de transition P et est indépendante de (Σ0, . . . ,Στk). Elle est donc en particulier indépendante de τk. Ainsi, (Στk+n − k, n ∈ N) est une chaîne de Markov de même loi que (Σn, n ∈ N) et qui est indépendante de τk. Enfin, en utilisant la question 2, (−Στk+n + k, n ∈ N) est une chaîne de M...

OBJECTIVE The present study was carried out to evaluate the effect of L-arginine on the learning and memory of estradiol-treated ovariectomized (OVX) rats. METHODS Forty-eight rats were divided into six groups: (1) sham, (2) OVX, (3) sham-Est, (4) OVX-Est, (5) sham-Est-LA, and (6) OVX-Est-LA. The animals of the sham-Est and OVX-Est groups were treated by weekly injection of estradiol valerate...

a- structure eleetronique des semicondueteurs . les oxydes semiconducteurs forment des reseaux ioniques. le diagramme de bandes correspondant aun cristal ideeal d'un oxyde tel que zno est forme uniquement de bandes completement remplies appartenant achacum des ions car, par definition, les ions zn et o= ont toutes leurs orbitals occupees par des doublets ou vides : zn 3d 4s zn 3d 4s o 2s 2...

The aim of the current study was to determine the effects of different eggshell temperatures (EST) during 10 to 18 d of incubation on embryonic development, hatchability, chick quality, first-week broiler performance. The EST were maintained within the temperature ranges of 33.3 to 36.7, 37.8 to 38.2, and 38.9 to 40.0°C for the low, control, and high EST treatments, respectively. From d 15 to 1...

Esterase (Est) and esterase-D (Est-D) electrophoretic patterns identified by starch gel electrophoresis of skeletal muscle protein extracts of 184 specimens of three species of peacock bass, locally known as tucunares (Cichla monoculus, C. temensis and Cichla sp), plus four specimens of a supposed hybrid (C. monoculus vs C. temensis), collected from the Central Amazon, were examined to determin...

Aims. To evaluate the need for endoscopic sphincterotomy (EST) before covered self-expandable metal stent (CSEMS) deployment for malignant lower biliary stricture with pancreatic duct obstruction. Methods. This study included 79 patients who underwent CSEMS deployment for unresectable malignant lower biliary stricture with pancreatic duct obstruction. Treatment outcomes and complications were c...

In addition to antioxidative effects, estrogens also exert pro-oxidative actions. The effect of chronic administration of a high dose of estradiol valerate on Morris water maze tasks and brain tissues oxidative damage was investigated. The Sham-Est and OVX-Est groups were treated with estradiol valerate (4 mg/kg) for 12 weeks. Escape latency and traveled path in the Sham-Est and OVX-Est groups ...