上集我們講述了小臭鼩應對寒冬的一道機制,今集我們將會講述熊貓應付寒冬的一道怪招。516Please respect copyright.PENANAPTfbmVaZX6516Please respect copyright.PENANAfBsf9TofqH
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(圖2)有研究發現(Ref1),當攝氏低過15度的時候,熊貓會將馬糞塗滿全身,而且選糞中亦有一定的揀擇,牠們並不會採用暴露於大自然間超過10日的馬糞。516Please respect copyright.PENANAMJVb1wFuIa516Please respect copyright.PENANAFoOoRwhgCK
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為何會塗糞上身,而且為何又如此揀擇呢?516Please respect copyright.PENANAcixu85u88T
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(圖3)最後科學家發現,新鮮馬糞含有一定份量的化合物,BCP/BCPO (beta-caryophyllene/caryophyllene oxide) ,而這些化合物具有抑壓負責感測寒冷的TRPM8蛋白質功效。516Please respect copyright.PENANAK4mVCpJyQC516Please respect copyright.PENANAVzLqdrxfmJ
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利用老鼠作實驗體,在牠們身體塗上BCP/BCPO液體以模仿熊貓塗馬糞的舉動,對比塗上鹽水的對照群組,塗上化合物液體的老鼠較傾向行走寒冷的地方,而且亦較少互相擁抱取暖。516Please respect copyright.PENANAwyBjefsTuW
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因此科學家推斷,熊腦大有可能透過馬糞中的化合物抑制身體的TRPM8蛋白質,以自欺欺人的方式盡量減低身體感知寒冷的能力,使自己感覺良好渡過寒冬。516Please respect copyright.PENANAhTlZEKvw54
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但為何熊貓會懂得馬糞中含有對應的化合物,那就還是一個無法拆解的謎。516Please respect copyright.PENANAKyOTSgijST
亦有可能的是,馬糞還有另外的功用尚未被揭曉出來。516Please respect copyright.PENANAZFh5T36XnN
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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。516Please respect copyright.PENANAreHtDwCBDR
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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/toc516Please respect copyright.PENANAUMScxMssOh
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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。516Please respect copyright.PENANAVGEAMz8HXE
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Link:516Please respect copyright.PENANA2oU99iIr8M
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https://www.instagram.com/potatopigtongue/516Please respect copyright.PENANAn5VseeGEs0
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Ref1:https://www.pnas.org/content/early/2020/12/01/2004640117516Please respect copyright.PENANAnHJsWDFbzr
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真實影片:https://www.sciencemag.org/sites/default/files/120720-pandas.mp4516Please respect copyright.PENANA7TtR6Tn9lk
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