第二次世界大戰後,美國、前蘇聯及其他國家在1951-1963年之間分別在地面上進行數以百計的核試,246Please respect copyright.PENANAJ3HZSEvlgS
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直至1963年大家互相簽署了停止核試條約,地面引爆核試才得以終止進行;雖然1960-1970年間中國及非洲仍有進行少量微型地面核試。246Please respect copyright.PENANA6F1wOGBKwe
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地面核試,無疑會為大自然界帶來影響。246Please respect copyright.PENANAFxzLA00HYZ
其中一隻名為137Cs的幅射性原子,不但能對生物帶來傷害,且具有水溶性特質,其半衰期亦達30.2年之多;246Please respect copyright.PENANAcOfFxCI4ef
亦即是說渡過30.2年之後,其濃度才會自然地減半。246Please respect copyright.PENANAafdHThjxdI
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(圖2)植物普遍需要鉀元素(K)輔助生長,因此天生擁有相應的蛋白質負責吸取泥土的鉀元素。246Please respect copyright.PENANArO8bkRL7Ho
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然而基於137Cs與K的特質非常相似,植物不其然間亦會因而吸取了帶有幅射性的137Cs原子。246Please respect copyright.PENANAjkKLr6EoPC
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如果往植物施上含鉀元素(K)或銨 (NH4)的肥料,均可大幅度減低植物吸取泥土間137Cs的效率。246Please respect copyright.PENANAXcK53xhGFX
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(圖3)科學家審視2017-2019年美國各地的蜜糖商品,發現122個樣本中並有68個樣本測量出137Cs的存在。246Please respect copyright.PENANACk9NSrpNQW
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不過其含量非常之低,平均僅約0.03Bq 137Cs kg−1,最高濃度的樣本為19Bq 137Cs kg−1,依然遠低於美國FDA制定的1200Bq 137Cs kg−1安全界線。246Please respect copyright.PENANAWp5SA9woPe
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研究還發現,當地蜜糖樣本是否含有137Cs原子,與當地泥土的137Cs含量並無任何關連。246Please respect copyright.PENANAUBS2Wu64bJ
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無論如何,核廢理的處理與人類生活健康的議題,均需密切關注,不容忽視。246Please respect copyright.PENANAsh71IoQlcW
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。246Please respect copyright.PENANAAjOGd6ED80
246Please respect copyright.PENANAb4qyo5YR10
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc246Please respect copyright.PENANAHv0clZ9ay4
246Please respect copyright.PENANApgcjEPKDXR
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。246Please respect copyright.PENANAD5DeCEobIp
246Please respect copyright.PENANAg17uSXyofW
Link:246Please respect copyright.PENANANdaSBtXZyt
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio246Please respect copyright.PENANAx17eUfQi6O
246Please respect copyright.PENANAR8kwzHhrtL
246Please respect copyright.PENANA2Fz3A4t4xM
除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。246Please respect copyright.PENANAivxCQi160X
246Please respect copyright.PENANAHT1V9c53CR
Ref1:https://www.nature.com/articles/s41467-021-22081-8#MOESM3246Please respect copyright.PENANAV5MI0VZsnY
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #208
三十秒科學–1950年代地面核試對2020年的影響
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