如果測量一個人的細胞數量,事實上只有25%是屬於人體細胞,其餘的75%均由細菌及真菌所據。1539Please respect copyright.PENANAIsvqZeSlga
1539Please respect copyright.PENANA0l57FfT0hj
細菌及真菌可以說是「無處不在」,它們不但寄宿於我們的皮膚外層,亦同時駐紮在我們身體內的腸道及各器官部位,與我們成呈共生關係。1539Please respect copyright.PENANAXiIf6AYiMl
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最近有科學家發表學術文章(Ref1),講述位於汗腺附近的細菌就是腋下異味的其中一個元兇。1539Please respect copyright.PENANA1UGgG09lNY1539Please respect copyright.PENANANq9pxJ004x
1539Please respect copyright.PENANAGwYqDSsBS5
(圖1)我們身體的肝腺大致分為兩種,外分泌汗腺(Eccrine Sweat Glands)及大汗腺1539Please respect copyright.PENANAlwwRTNAWRe
(Apocrine Sweat Glands)1539Please respect copyright.PENANADVGikMByzP
1539Please respect copyright.PENANAO9njoBXKz9
前者接近遍佈全身,不與毛髮連接。後者主要位於腋下、乳頭及私處部位,與毛髮連接。1539Please respect copyright.PENANApzRgxt3qEq
1539Please respect copyright.PENANAvZy1W2EVAe
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1539Please respect copyright.PENANATGnqpZIg9X
1539Please respect copyright.PENANA3BemHTeduT
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1539Please respect copyright.PENANAsbqtMbtZNT
1539Please respect copyright.PENANAtLcZfWJpuU1539Please respect copyright.PENANASmWdzRRlLr
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(圖2)下列三點為文中所找出的異味散發機制。1539Please respect copyright.PENANArTM02znmu1
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1.大汗腺釋出無味物質Cys-Gly-3M3SH。1539Please respect copyright.PENANAe9IdZqtvrp
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2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1539Please respect copyright.PENANAx5ik6A40sb
1539Please respect copyright.PENANAVGmFJHx404
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1539Please respect copyright.PENANAgibqyHtWkh
1539Please respect copyright.PENANABJQgXtIf1B
換句話說,腋下的異味就是由這些細菌引致而成的。1539Please respect copyright.PENANAufNvSSTHo1
1539Please respect copyright.PENANA5PzeIRTDxD1539Please respect copyright.PENANARaO1poCEI4
1539Please respect copyright.PENANAiQ5vzVrS5v
(圖3)為作進一步的證實,科學家利用黃金葡萄球菌作對照實驗。1539Please respect copyright.PENANA9FPVdsvXb3
1539Please respect copyright.PENANAfn9Z3z7bcL
他們發現人葡萄球菌的近親黃金葡萄球菌並沒能夠將無味的Cys-Gly-3M3SH消化成為帶有異味的3M3SH。1539Please respect copyright.PENANAj6rxtbRdi0
但是,當把人葡萄球菌其中一隻酵素轉移到黃金葡萄球菌後,無味的Cys-Gly-3M3SH便能夠被消化成為帶有異味的3M3SH,證實異味是由那隻酵素所致。1539Please respect copyright.PENANAJRkR8azgDR
1539Please respect copyright.PENANAq8BUUSB3Ge
這隻酵素一直以來並沒有被前人發現,亦即是說,只要能夠研發出抑制那隻酵素的止汗劑的話,腋下的大部份異味亦能得以除去;1539Please respect copyright.PENANARpGEYlMVKQ
1539Please respect copyright.PENANAJ6wPi3Kvh4
異味的產生,基本上是由硫醇(Thioalcohol)及脂肪酸(Fatty acid)而成。此文章所談及的機制純屬與硫醇的產生有關,沒有觸及脂肪酸那一方面。1539Please respect copyright.PENANAc0AGftQUdG
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而臭狐是否由這細菌引起或有份參與,文中並沒有提及。1539Please respect copyright.PENANArjAd3u33Um
1539Please respect copyright.PENANATZyznDOXXj
1539Please respect copyright.PENANAVYhlCydc4F
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。1539Please respect copyright.PENANAxbIQA5wse4
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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/toc1539Please respect copyright.PENANAr5tJgMGzDr
1539Please respect copyright.PENANAcy7REHwzZC
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。1539Please respect copyright.PENANALrMb2sHrh1
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Link:1539Please respect copyright.PENANArWgpyaNREh
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1539Please respect copyright.PENANAaVM0prsefL
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有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1539Please respect copyright.PENANAVSFiv4deae
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Ref1:https://www.nature.com/articles/s41598-020-68860-z1539Please respect copyright.PENANAYBX51hBGLx