shiftwork that affects diverse aspects of human life is arranged in various schedules. the main purpose of this study was to compare psycho-social problems among employees working in different 12-hour shift schedules of iranian petrochemical industries. this cross-sectional study was carried out at eight petrochemical companies in asalooyeh area. the study population consisted of 549 shift work...

This study investigates the effect of gluconate, a carboxylate anion, and three uncharged hexitols, D-sorbitol, d-mannitol D-galactitol on solubility C-S-H. Thermodynamic modeling is used to determine kind amount Ca-organic-silicate-OH complexes that potentially form in conditions studied. All organics with calcium hydroxide. In addition, heteropolynuclear calcium, hydroxide silicate are observ...