thermal behavior of various solid feldspars are different, namely those of bivalent cations show no change in the distribution of al and si atoms, whereas feldspars of univalent cations become more disordered with raising temperature. in the latter case al atoms migrate from the sites they occupe at low temperatures and interchange positions with the si atoms. at high temperatures (but still be...

The Kırka borate deposit (Miocene), in western Turkey, the most important B2O3 producer at present in the world, exhibits a symmetrical zonation in a lateral sense; it is comprised of: a central body of Na borate (borax), an intermediate zone of Na–Ca borate (ulexite), and a marginal zone of Ca borate (colemanite). This mineral zonation is also developed in a vertical sense, although it is some...

Comparing the questions -proposed for this discourse panel with those identified for the TINLAP-2 panel eight years ago, it becomes clear that some progress has been made in discourse studies. While TINLAP-2's questions seem concerned with identifying an ideal model of discourse (e.g., what constitutes an appropriate model of discourse, how domain-dependent must such models be, what makes disco...

objectives: this study intends to evaluate marital adjustment of the addicts in isfahan na groups and their couples. methods: in this cross-sectional analytic-descriptive study, two centers were randomly selected among all of the na groups in isfahan in 2012. in the next stage, 40 addicts (both male and female) who were randomly selected from each center as well as their couples were asked to p...

this study was carried out to determine the appropriate size of caspian trout ( salmo caspius kessler, 1877) juveniles for releasing into the rivers that enter south of the caspian sea for stock enhancement, or possibility of cage culture in the caspian sea. a total of 1611 specimens in 4 weight groups of 5, 10, 15 and 20g were exposed to 3 salinity trials which include caspian sea water (11- 1...

in the present study we focused on the electronic and structural properties of na and mg adsorption on the surface of the (6, 6) armchair sicnts. the adsorption energy (eads), band gap energy (eg), partial density of state (pdos), chemical potential (μ), global hardness (η), electrophilicity index (ω), global softness (s), work function values (φ) and work function change (δφ) are calculated by...