The developing crisis at the Fukushima Daiichi nuclear power plant in the wake of the March 11 earthquake and tsunami has raised concerns over the health effects of radiation exposure:What is a'dangerous'level...The developing crisis at the Fukushima Daiichi nuclear power plant in the wake of the March 11 earthquake and tsunami has raised concerns over the health effects of radiation exposure:What is a'dangerous'level of radiation? How does radiation damage health? What are the consequences of acute and long-term low-dose radiation? Though radioactive steam has been released to reduce pressure within the plant's reactors and there has been additional radiation leakage from the three explosions at the plants, the resulting spikes in radiation levels have not been sustained.展开更多
The horizontal and vertical distributions of Antarctic krill in the Prydz Bay region were investigated in 1991/1992 and 1992/1993. The result showed that the high density distribution area of Antarctic krill was withi...The horizontal and vertical distributions of Antarctic krill in the Prydz Bay region were investigated in 1991/1992 and 1992/1993. The result showed that the high density distribution area of Antarctic krill was within the area of 63°～67°S 、68°E and the waters of above 70 m deep. The standing crops of Antarctic kill was 1.699×10 6 t within the surveyed area of 150533.9 km 2 in 1991/1992 and 4.043×10 6 t within the surveyed area of 125740.7 km 2 in 1992/1993.展开更多
文摘The developing crisis at the Fukushima Daiichi nuclear power plant in the wake of the March 11 earthquake and tsunami has raised concerns over the health effects of radiation exposure:What is a'dangerous'level of radiation? How does radiation damage health? What are the consequences of acute and long-term low-dose radiation? Though radioactive steam has been released to reduce pressure within the plant's reactors and there has been additional radiation leakage from the three explosions at the plants, the resulting spikes in radiation levels have not been sustained.
文摘The horizontal and vertical distributions of Antarctic krill in the Prydz Bay region were investigated in 1991/1992 and 1992/1993. The result showed that the high density distribution area of Antarctic krill was within the area of 63°～67°S 、68°E and the waters of above 70 m deep. The standing crops of Antarctic kill was 1.699×10 6 t within the surveyed area of 150533.9 km 2 in 1991/1992 and 4.043×10 6 t within the surveyed area of 125740.7 km 2 in 1992/1993.
