又称半数致死剂量，LD50 。指能导致中毒人员或动物半数死亡的剂量。通过呼吸道吸入的半致死剂量单位是毫克。分/升（mg.min/l）；通过口服和皮肤吸收的半致死剂量单位均是毫克/千克（mg/kg）。
...龙果；60Co γ射线；半致死剂量；EMS处理；半致死浓度 [gap=1161]Key words: Pitaya; 60Co γ irradiation; Median lethal dose (LD50); EMS treatment; Median lethal concentration (LC50) ..
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... 半涨潮 half flood 半致死剂量 half lethal dose 半自动封罐机 semi-automatic seamer ...
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Through the pre-experiment in our lab, we identify that 50Gy is the semi-lethal dose.
通过实验室内的预备实验我们确定了50Gy为榆树的半致死剂量。
参考来源 - 榆树辐射诱变育种的研究The results are as followings:1. The results of the acute toxicity experiment showed that:LD_(50) of Amanita fuliginea in mice is 112.25 mg /kg,95% confidence limit of 88.09 to 143.05mg/kg.
具体研究结果如下:1急性毒性实验研究结果表明:灰花纹鹅膏菌对小鼠的半致死剂量为112.25mg/kg,95%可信限为88.09～143.05mg/kg:致命鹅膏菌对小鼠的半致死剂量为255.51mg/kg,95%可信限196.88～331.59mg/kg。
参考来源 - 鹅膏肽类毒素的毒理及灵芝对其所致肝损伤的保护作用研究The results are as followings:1. The results of the acute toxicity experiment showed that:LD_(50) of Amanita fuliginea in mice is 112.25 mg /kg,95% confidence limit of 88.09 to 143.05mg/kg.
具体研究结果如下:1急性毒性实验研究结果表明:灰花纹鹅膏菌对小鼠的半致死剂量为112.25mg/kg,95%可信限为88.09～143.05mg/kg:致命鹅膏菌对小鼠的半致死剂量为255.51mg/kg,95%可信限196.88～331.59mg/kg。
参考来源 - 鹅膏肽类毒素的毒理及灵芝对其所致肝损伤的保护作用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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