Crosslinked Polydiallyldimethylammonium Chloride Adsorbent for the Selective Separation of Rhenium Ions from Pregnant Leach Solutions.

The depletion of valuable mineral reserves has rendered effluents generated from mining and industrial processing activities a promising resource for the production of precious elements. The synthesis and improvement of new adsorbents to extract valuable compounds from industrial wastes and pregnant leach solutions, besides increasing wealth, can play a significant role in reducing environmental concerns. In this work, a new and low-cost adsorbent for the selective extraction of rhenium (perrhenate ions, ReO) was synthesized by the free-radical polymerization (FRP) of a diallyl dimethylammonium chloride monomer (quaternary amine) in the presence of a crosslinker.

Impact of career choice motivation on academic burnout in senior dental students: A cross-sectional study.

Background: Motivation triggers all human activities including learning and lack of career motivation can lead to decreased efficiency. This study assessed the association between academic burnout and career choice motivation in senior dental students.

Methods: This cross-sectional study was performed on senior dental students of all four dental schools in Tehran in 2017.