THE METABOLISM OF ⁶⁰Co AND ¹³⁷Cs BY ARCA GRANOSA LINNUS     

蔡福龙  陈英  许丕安 《海洋学报(英文版)》1984,3(3):433-436

The pathway by which "Co and 137C3 got into Area, and the type of uptake in animal were studied. The results showed that 60Co was taken up by gill and was transferred quickly to other organs through blood. There are more uptake pathways for 137Cs. The uptake of 60Co by Arca was mainly active transfer and the energy comes mainly from the process of biotic oxidation. On the contrary, the uptake of 137C3 by Arca was mainly a passive transfer, and for most organs the exchange through body-wall was a significant factor.  相似文献   

石羊河流域雷暴气候特征及防护等级区划          下载免费PDF全文

马中华  杨晓玲  张春松  陈英 《沙漠与绿洲气象(新疆气象)》2023,17(2):58-64

利用1961—2013年石羊河流域5个气象站的雷暴资料，运用统计学方法分析了石羊河流域雷暴的时空变化特征，并对雷暴防护等级进行划分。结果表明：石羊河流域年、年代雷暴日总体呈减少趋势，天祝的减少趋势尤为显著，递减率达-5.843 d/10 a，雷暴日的时间序列存在7～8 a的准周期变化。石羊河流域雷暴初日最早出现在3月下旬（永昌），其他均出现在4月上旬，终日最晚出现在10月下旬末（永昌出现在10月上旬初），平均雷暴期为100.4～171.3 d。6—8月是雷暴的高发期，雷暴日占年雷暴总日的70.7%～78.4%。雷暴的日变化明显，雷暴多发时段为12—22时，集中发生时段为13—17时，雷暴的平均持续时间为10～40 min。石羊河流域雷暴具有明显的地域特征，南部山区天祝雷暴日远大于其他各地，占总雷暴日的40.8%。随着雷暴站数的增多，区域性雷暴日迅速减少。石羊河流域雷暴防护等级划分为3级：天祝属1级防护，为高雷区；永昌和古浪属2级防护，为多雷区；民勤和凉州属3级防护，为少雷区。  相似文献