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。1514Please respect copyright.PENANAktJ9dnMd5B
1514Please respect copyright.PENANAvTu3fxO3JT
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。1514Please respect copyright.PENANAWkqpeUgdCQ
1514Please respect copyright.PENANANSiejI4iuV
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。1514Please respect copyright.PENANAMe54FoaP41
1514Please respect copyright.PENANAWVZ2cLI7PS
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(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1514Please respect copyright.PENANAW9OoSoJaCc
(Apocrine Sweat Glands)1514Please respect copyright.PENANAEF9xFcpzMM
1514Please respect copyright.PENANAYDXlruqQLk
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。1514Please respect copyright.PENANABbRyjEImoL
1514Please respect copyright.PENANA7HB9jfBHEp
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1514Please respect copyright.PENANAqyp73Kj3cU
1514Please respect copyright.PENANAWThJSJoYvH
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1514Please respect copyright.PENANA8PkOLqARcy
1514Please respect copyright.PENANA4WJC9NBRAk
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(圖2)下列三點為文中所找出的異味散發機制。1514Please respect copyright.PENANAuVtjiNWBfy
1514Please respect copyright.PENANAo7pr62b4KL
1.大汗腺釋出無味物質Cys-Gly-3M3SH。1514Please respect copyright.PENANA4E0oF1bC82
1514Please respect copyright.PENANAPM0bherTMH
2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1514Please respect copyright.PENANArNEYCRaFUT
1514Please respect copyright.PENANAt3IgMZhGpH
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1514Please respect copyright.PENANAjyaa7leA2M
1514Please respect copyright.PENANA3iNiqtxySp
換句話說,腋下的異味就是由這些細菌引致而成的。1514Please respect copyright.PENANAviTeLssC3L
1514Please respect copyright.PENANAOmAJjnhqQ8
1514Please respect copyright.PENANApNPshFgOga
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(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。1514Please respect copyright.PENANAovRk744W87
1514Please respect copyright.PENANAlDFUjjgvNA
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。1514Please respect copyright.PENANACXLVmyn0kq
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。1514Please respect copyright.PENANAP2lL6qj7oY
1514Please respect copyright.PENANAq1jYkSbcNb
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;1514Please respect copyright.PENANAmjDwtYGxNt
1514Please respect copyright.PENANA4qcZ0A7amD
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。1514Please respect copyright.PENANAscyKSQhTWR
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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。1514Please respect copyright.PENANAVOSzmxG72N
1514Please respect copyright.PENANAN14Akh1iZe
1514Please respect copyright.PENANAf3JP4V4RqB
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。1514Please respect copyright.PENANA956L7MHMnh
1514Please respect copyright.PENANACBs4o5dlST
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/toc1514Please respect copyright.PENANAVgyFBAcd00
1514Please respect copyright.PENANAqgSeKLu4QH
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。1514Please respect copyright.PENANA2vFBXQhPy0
1514Please respect copyright.PENANAouLNtzxrEX
Link:1514Please respect copyright.PENANAhN42N9U2cD
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1514Please respect copyright.PENANAHg2LQnPnuN
1514Please respect copyright.PENANAhvN0WFdqw7
1514Please respect copyright.PENANAkUDOwO1qxQ
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1514Please respect copyright.PENANAa9UvvYsezz
1514Please respect copyright.PENANAUQv4P2SNOg
Ref1:https://www.nature.com/articles/s41598-020-68860-z1514Please respect copyright.PENANA3lqGipQDxY
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科普專欄–薯不揀單
Author:
薯仔聞茱莉
ISSUE #24
深入淺出–腋下異味的來源
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