Endoscopic sedation practices of Greek gastroenterologists: a nationwide survey.

Background: Sedation in gastrointestinal endoscopy is rapidly evolving worldwide. However, this has led to significant disagreements, especially regarding the use of propofol by non-anesthesiologists. The aim of this study was to document the practices of Greek gastroenterologists regarding sedation and compare them to previous surveys.

Environmentally available hexavalent chromium in soils and sediments impacted by dispersed fly ash in Sarigkiol basin (Northern Greece).

Hexavalent chromium is one of the most toxic and carcinogenic species known and can be released into the environment from several sources. In Sarigkiol basin (N Greece) the presence of Cr(VI) in soil, sediments and groundwater may originate from both natural (ophiolitic rocks and their weathering products) and anthropogenic (dispersed fly ash produced from lignite power plants) sources. In this study, the distribution of contents and origin of environmentally available Cr(VI) in soils, sediments, regoliths and fly ash of Sarigkiol basin is presented.