9a273594-13e3-4c52-91de-373cd761f67f English UTF-8 Dataset Mr. Sakthivel Samy V National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Point of contact 2020-12-11 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Melatonin Rhythm and Sleep Pattern in Antarctica. 2020-10-06 Creation Document digital Melatonin rhythm and sleep pattern of 6 wintering members of the XXIV Indian Scientific Expedition to the Antarctica were investigated during the entire period of journey and stay at Antarctica. The study was carried out at three different geographic locations. Baseline data collection was carried out in November 2004 at Delhi, India, before departing for Antarctica. On board ship, in December 2004 soon after entering the Antarctic Circle and at Maitri from January 2005 to January 2006. Melatonin was estimated from saliva by ELISA method and sleep was assessed polysomnographically. A consistent delay in the melatonin acrophase was observed during the dark winter months. The mesor of this hormone showed a maximal increase in the midwinter month of June. The present study was undertaken to find out whether there is any change in the circadian rhythm of melatonin secretion and sleep pattern of tropical Indian expeditioners, who are mostly unknown to the alien Antarctic environment of altered photo period and prolonged isolation and extreme cold. Completed Dr. Moushum Bhattacharyya National Centre for Polar and Ocean Research (NCPOR) 8322525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND ictd@ncpor.res.in Principal investigator Earth Science-Human Dimensions Theme Maitri Antarctic Place Melatonin Rhythm and Sleep Pattern in Antarctica Project English health 20.0 140.0 -90.0 30.0 2004-01-01 2005-12-31 TableDigital unknown unknown Mr. Sakthivel Samy V National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Distributor http://npdc.ncpor.res.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF-2109770840&userType=user&freeTextValue=Melatonin+Rhythm+and+Sleep+Pattern+in+Antarctica.