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。2131Please respect copyright.PENANALcMRkQ22jC
2131Please respect copyright.PENANAYpfdfTbFaF
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。2131Please respect copyright.PENANAySi2Xk8xS0
2131Please respect copyright.PENANALojaPcvi1M
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。2131Please respect copyright.PENANAEsbFvwPvbL2131Please respect copyright.PENANA10qfsx6LnT
2131Please respect copyright.PENANAeOWqoYWKCN
(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2131Please respect copyright.PENANAPMVFX2MJ4H
(Apocrine Sweat Glands)2131Please respect copyright.PENANAZwrE0gXD5a
2131Please respect copyright.PENANAqm29qE6lbo
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。2131Please respect copyright.PENANAbruTcmb8FF
2131Please respect copyright.PENANA9KKPlnTffP
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。2131Please respect copyright.PENANAo0lOQk3A4X
2131Please respect copyright.PENANAnIgv1CUsdX
而大汗腺的主要功能,到目前為止仍未能搞得清楚。2131Please respect copyright.PENANAJTjrjubUDk
2131Please respect copyright.PENANAn1uYjDICCH2131Please respect copyright.PENANAR5BUYdkcT4
2131Please respect copyright.PENANA3Yg8ljUejs
(圖2)下列三點為文中所找出的異味散發機制。2131Please respect copyright.PENANAsXQugq0AWo
2131Please respect copyright.PENANAveTgcmPVtS
1.大汗腺釋出無味物質Cys-Gly-3M3SH。2131Please respect copyright.PENANAS1TIZVGWM8
2131Please respect copyright.PENANAmgVIGTaHRI
2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。2131Please respect copyright.PENANAnAQd9G6VyZ
2131Please respect copyright.PENANA49zjzRDK5O
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。2131Please respect copyright.PENANA1AKvuiTMOd
2131Please respect copyright.PENANAAeZpDB5vy5
換句話說,腋下的異味就是由這些細菌引致而成的。2131Please respect copyright.PENANAgIse4MpEQB
2131Please respect copyright.PENANAmLV3YljOlX2131Please respect copyright.PENANAw8PNfhhT52
2131Please respect copyright.PENANAn1zCCU0vMo
(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。2131Please respect copyright.PENANANQqGaisEOp
2131Please respect copyright.PENANAHg10yQ4Tjn
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。2131Please respect copyright.PENANAKSk0wfbCXT
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。2131Please respect copyright.PENANA65Xu8CXT8d
2131Please respect copyright.PENANAxUrzWuMycZ
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;2131Please respect copyright.PENANANNzfNboEdx
2131Please respect copyright.PENANADWzWcxS4ZK
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。2131Please respect copyright.PENANAszpEijdzWa
2131Please respect copyright.PENANAARgkA9vPcw
而臭狐是否由這細菌引起或有份參與,文中並沒有提及。2131Please respect copyright.PENANAKWDjhfJVQR
2131Please respect copyright.PENANAoNxgIRWDBT
2131Please respect copyright.PENANASphp9myLTc
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。2131Please respect copyright.PENANAJkHn4Ajhn7
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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/toc2131Please respect copyright.PENANAoDeXWVJIs7
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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。2131Please respect copyright.PENANANI4JN8E1vr
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Link:2131Please respect copyright.PENANAyGRS0Zvl9Y
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio2131Please respect copyright.PENANAH7eHvdwKeW
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有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。2131Please respect copyright.PENANAoO8WfqGJkq
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Ref1:https://www.nature.com/articles/s41598-020-68860-z2131Please respect copyright.PENANAOEcdux4MHg