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تعداد نتایج: 1226832 فیلتر نتایج به سال:
have identified an endosomal receptor complex that pushes proteins into the lumen of endosomes destined for the vacuole. This internalization step represents another possible site of regulation for controlling receptor activity. Receptors and other plasma membrane proteins bound for destruction are tagged with one or more ubiquitin (Ub) molecules before they are internalized in vesicles that fu...
Since the identification of the hepatitis C virus (HCV) and subsequent cloning of its genome in 1989, only relatively modest progress had been made in the treatment of its chronic infection until recently. Interferon-alfa was approved in 1991 for the treatment of HCV infection, and provided a sustained virological response (SVR) of 9% for genotype 1, and 20–30% for genotypes 2 and 3. With the a...
saluk mount is selected for devonian biostratigraphy. this area located at southwest of bojnurd. in this study three sections are selected and two sections, chahar-borj and tabar sections with a thickness of 650 m, which consist mainly of calcareous sediments was studied in detailed but third section, qelli section, with a thickness of about 450m which consist mainly of sandstone and evaporates...
AIMS To identify the diversity of pigmented aerobic spore formers found in the environment and to characterize the chemical nature of this pigmentation. MATERIALS AND RESULTS Sampling of heat-resistant bacterial counts from soil, sea water and the human gastrointestinal tract. Phylogenetic profiling using analysis of 16S rRNA sequences to define species. Pigment profiling using high-performan...
Probably nothing makes human beings more different from other species—and from one another— than their intelligence. The subject is of profound general interest—what the brain is for and how it works, the distinctiveness of the human mind, what makes us individual and human—yet delivers so little. Human intelligence remains poorly defined and characterized, even among those who most study it. R...
We discuss the very different methods in each wavelength band for selecting and finding Active Galactic Nuclei (AGN). We briefly review the history of the different techniques for finding AGN and compare and contrast the advantages and difficulties of selection in different wavelength bands. We stress the strong selection effects in each wavelength band and the difficulty of defining complete s...
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