The ciliated protozoan Paramecium has a regulated secretory system amenable to genetic analysis. The secretory storage granules, known as trichocysts, enclose a crystalline matrix with a genetically determined shape whose biogenesis involves proteolytic maturation of a family of precursor molecules into a heterogeneous set of small acidic polypeptides that crystallize within the maturing vesicl...

background: while articular chondrocytes are among those appropriate candidates for cartilage regeneration, the cell dedifferentiation during monolayer culture has limited their application. several investigations have indicated the usefulness of alginate, but the topic of proliferation and differentiation of chondrocytes in alginate culture has still remained controversial. methods: rat articu...

the present study has objectively investigated and reviewed 164 managers, employees and workers of tuka steel investment holding company (tsih co.) as one of the most successful companies in iran's steel industry. the survey approach has been adopted to serve the following purposes of this study: a) to define the prevailing organizational culture in steel industry; and b) to review alignment do...

There are different views on the relationship between language and culture. Some consider them as separate entities one being a code-system and the other a system of beliefs and attitudes. Some believe in a cause and effect relationship between the two; and yet others argue for a co-evolutionary mode of interrelation. This paper will subscribe to the Hallidayan co-evolutionary view of the relat...