科普專欄–薯不揀單 - 三十秒科學–1950年代地面核試對2020年的影響

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，398Please respect copyright.ＰＥＮＡＮＡSb15SWk6yU
398Please respect copyright.ＰＥＮＡＮＡsh7VkqxbZ4
398Please respect copyright.ＰＥＮＡＮＡd2bCxEIsBC
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。398Please respect copyright.ＰＥＮＡＮＡzRZNc6BHiV
398Please respect copyright.ＰＥＮＡＮＡsDdzWRiuKo
地面核試，無疑會為大自然界帶來影響。398Please respect copyright.ＰＥＮＡＮＡBp9gtrbFyG
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;398Please respect copyright.ＰＥＮＡＮＡVCFax5wjNK
亦即是說渡過30.2年之後，其濃度才會自然地減半。398Please respect copyright.ＰＥＮＡＮＡZsQiG0zoxi
398Please respect copyright.ＰＥＮＡＮＡGrwIbi397p
398Please respect copyright.ＰＥＮＡＮＡJHPyNo4oN9
(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。398Please respect copyright.ＰＥＮＡＮＡ7KCHapn2lm
398Please respect copyright.ＰＥＮＡＮＡqmFkOza6yT
398Please respect copyright.ＰＥＮＡＮＡXjQurp9WVS
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。398Please respect copyright.ＰＥＮＡＮＡb7ZKcu1WUw
398Please respect copyright.ＰＥＮＡＮＡ57zDuAC3Ea
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。398Please respect copyright.ＰＥＮＡＮＡQLNqlAMSCa
398Please respect copyright.ＰＥＮＡＮＡm3EJytCLGb
398Please respect copyright.ＰＥＮＡＮＡmwQfh2qayZ
(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。398Please respect copyright.ＰＥＮＡＮＡ2OVCHTBEEq
398Please respect copyright.ＰＥＮＡＮＡe70j7Gtk5t
398Please respect copyright.ＰＥＮＡＮＡ7l7ZS5RWnP
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。398Please respect copyright.ＰＥＮＡＮＡz17AIrPFsR
398Please respect copyright.ＰＥＮＡＮＡDPCrqdXjus
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。398Please respect copyright.ＰＥＮＡＮＡX3EiClj1cF
398Please respect copyright.ＰＥＮＡＮＡkkMuWQzQsU
398Please respect copyright.ＰＥＮＡＮＡEbuWHR5aiG
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。398Please respect copyright.ＰＥＮＡＮＡz9W1yeshE2
398Please respect copyright.ＰＥＮＡＮＡNRlecfRFa7
398Please respect copyright.ＰＥＮＡＮＡEQ1smW3phh
398Please respect copyright.ＰＥＮＡＮＡPlf65WsUSR
398Please respect copyright.ＰＥＮＡＮＡ3YOxaVLdFo
398Please respect copyright.ＰＥＮＡＮＡJRtqB6xXn5
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。398Please respect copyright.ＰＥＮＡＮＡLK8TSlON3m
398Please respect copyright.ＰＥＮＡＮＡWJTY4OTtHx
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/toc398Please respect copyright.ＰＥＮＡＮＡWFPV5AK5IA
398Please respect copyright.ＰＥＮＡＮＡKnsHcuuupn
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。398Please respect copyright.ＰＥＮＡＮＡdyl17jhukC
398Please respect copyright.ＰＥＮＡＮＡL2Yy3SuwPC
Link:398Please respect copyright.ＰＥＮＡＮＡ7iNzX8uuAA
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio398Please respect copyright.ＰＥＮＡＮＡhfgEJvxGvP
398Please respect copyright.ＰＥＮＡＮＡvhXEWK242J
398Please respect copyright.ＰＥＮＡＮＡmce9CrHiQd
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。398Please respect copyright.ＰＥＮＡＮＡOrBPRoqWQS
398Please respect copyright.ＰＥＮＡＮＡj6PdWHGEL6
Ref1:https://www.nature.com/articles/s41467-021-22081-8#MOESM3398Please respect copyright.ＰＥＮＡＮＡLf315uOWyz

ns3.137.163.99da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章