The activities of 7-ethoxyresorufin-O-deetylase （EROD）, 7-benzyloxyresorufin-O-debenzylase （BROD）, 7-pentoxyresorufin-O-depentilase （PROD）, and glutathione S-transferase （GST） were measured in Nile tilapias ex...The activities of 7-ethoxyresorufin-O-deetylase （EROD）, 7-benzyloxyresorufin-O-debenzylase （BROD）, 7-pentoxyresorufin-O-depentilase （PROD）, and glutathione S-transferase （GST） were measured in Nile tilapias exposed for 7 days of 5 and 15μg/L 17 β-estradiol. EROD and GST activities were unchanged. PROD activity increased in animals exposed to the higher dose of the hormone, while BROD was increased after 7 exposure days to both doses of the compound. These results indicate the usefulness of these enzymes as biomarkers for 17 β-estradiol exposure.展开更多
The Samoa Islands were struck by the September 2009 earthquake of Mw 8.1. We study the effect on the land level by means of GPS monitoring and on ocean level by tide-gauge records. This allows us to present a new pict...The Samoa Islands were struck by the September 2009 earthquake of Mw 8.1. We study the effect on the land level by means of GPS monitoring and on ocean level by tide-gauge records. This allows us to present a new picture of the interaction of crustal movements, gravitational adjustment and sea level changes. The land level exhibits a co-seismic uplift followed by a post-seismic crustal subsidence. The ocean level records a fall, significantly larger than the uplift and delayed by several months, followed by a significant rise, by far exceeding the crustal subsidence and delayed by several months. This indicates a significant contribution from changes in gravity (geoidal eustasy), besides relative sea level changes due to crustal movements. High amplitude, and high frequency changes in tidal range provide evidence of changes in gravity and geoidal eustasy.展开更多
文摘The activities of 7-ethoxyresorufin-O-deetylase （EROD）, 7-benzyloxyresorufin-O-debenzylase （BROD）, 7-pentoxyresorufin-O-depentilase （PROD）, and glutathione S-transferase （GST） were measured in Nile tilapias exposed for 7 days of 5 and 15μg/L 17 β-estradiol. EROD and GST activities were unchanged. PROD activity increased in animals exposed to the higher dose of the hormone, while BROD was increased after 7 exposure days to both doses of the compound. These results indicate the usefulness of these enzymes as biomarkers for 17 β-estradiol exposure.
文摘The Samoa Islands were struck by the September 2009 earthquake of Mw 8.1. We study the effect on the land level by means of GPS monitoring and on ocean level by tide-gauge records. This allows us to present a new picture of the interaction of crustal movements, gravitational adjustment and sea level changes. The land level exhibits a co-seismic uplift followed by a post-seismic crustal subsidence. The ocean level records a fall, significantly larger than the uplift and delayed by several months, followed by a significant rise, by far exceeding the crustal subsidence and delayed by several months. This indicates a significant contribution from changes in gravity (geoidal eustasy), besides relative sea level changes due to crustal movements. High amplitude, and high frequency changes in tidal range provide evidence of changes in gravity and geoidal eustasy.
