objective: application of chemical solvents especially in problematic canals is usually a part of the retreatment process.this study was performed to compare the solubility of gutta- percha and resilon in chloroform and to find the effect of sample thickness as well as the time of shaking on their solubility. materials and methods: specific weight of resilon and gutta-percha was placed in a sam...

background: trinitrotoluene (tnt) is one of the most well-known and oldest explosive agents. in the recent decade, bioenvironmental, biochemical, and biological effects of tnt exposure have been more in the spotlight. in this study, we aimed to evaluate spirometric parameters in workers of a tnt factory exposed to tnt and other related fumes and dusts compared with the unexposed controls. metho...

background: chemicals are among risk factors that can affect women's reproductive system. this study is aimed to investigate the association of occupational exposure to a mixture of organic solvents with menstruation disturbances and hormonal changes among female workers. methods : female workers of a pharmaceutical company were divided into three groups of non-exposed, low-exposed and highly-e...

Ionic liquids (ILs) are largely made of ions and short-lived ion pairs. These often possess a unique combination of physical and chemical properties which are not available with molecular solvents. ILs are dynamic, attractive and rich research area and are gaining considerable attention as promising molten materials for a variety of applications in pharmaceutical and biotechnology fields. Ionic...

In this review, the effect of organic solvents on microalgae cultures from molecular to industrial scale is presented. Traditional organic solvents and solvents of new generation-ionic liquids (ILs), are considered. Alterations in microalgal cell metabolism and synthesis of target products (pigments, proteins, lipids), as a result of exposure to organic solvents, are summarized. Applications of...

We have previously revealed, for the first time, the tendency of some profens (S-(+)-ibuprofen, S-(+)-naproxen, and S,R-(±)-2-phenylpropionic acid) to undergo oscillatory transenantiomerization when dissolved in some low-molecular-weight solvents. Such oscillatory reactions, which are relatively rare among chemical reactions, can be stimulated by several different physical and chemical conditio...