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。1463Please respect copyright.PENANAsWWk9xllIS
1463Please respect copyright.PENANAK44tFTMjfH
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。1463Please respect copyright.PENANAAqEGiM6WSD
1463Please respect copyright.PENANAMswRbbP03N
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。1463Please respect copyright.PENANAWSHoRbMzuD
1463Please respect copyright.PENANAWes6WCObAo
1463Please respect copyright.PENANAD3vaEiG0Hm
(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1463Please respect copyright.PENANATZrT3XBATV
(Apocrine Sweat Glands)1463Please respect copyright.PENANAOChijfCXBV
1463Please respect copyright.PENANAmbCT6IN9q1
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。1463Please respect copyright.PENANAkMDDfepw9N
1463Please respect copyright.PENANAQgtoiRi6SL
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1463Please respect copyright.PENANAYBpI0ScHzP
1463Please respect copyright.PENANA1VN81pPLtx
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1463Please respect copyright.PENANAa83fmKl698
1463Please respect copyright.PENANAeW699LkgZ8
1463Please respect copyright.PENANAAoQyG0B7sm
1463Please respect copyright.PENANADhsOUnsCgH
(圖2)下列三點為文中所找出的異味散發機制。1463Please respect copyright.PENANA3llhSYLSyp
1463Please respect copyright.PENANAwYDlv8fIEP
1.大汗腺釋出無味物質Cys-Gly-3M3SH。1463Please respect copyright.PENANA1sTrO8xOj1
1463Please respect copyright.PENANAQiO5Aw8Y3p
2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1463Please respect copyright.PENANAMkhFBvqllm
1463Please respect copyright.PENANANhgVJ643oo
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1463Please respect copyright.PENANAGMiCLseknF
1463Please respect copyright.PENANA2SMyLyVwvZ
換句話說,腋下的異味就是由這些細菌引致而成的。1463Please respect copyright.PENANAybeDnFF6yC
1463Please respect copyright.PENANAFxLkWZ5srh
1463Please respect copyright.PENANAcCZo6DM9gi
1463Please respect copyright.PENANAt3Qa5Ygrig
(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。1463Please respect copyright.PENANAVSAjZ5WuE5
1463Please respect copyright.PENANAX99iKAbc90
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。1463Please respect copyright.PENANAllWOzi7kqb
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。1463Please respect copyright.PENANAWdo6gUKGBm
1463Please respect copyright.PENANAE5Nzd9iWK8
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;1463Please respect copyright.PENANASX5latMWFy
1463Please respect copyright.PENANAzQwAhvwScM
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。1463Please respect copyright.PENANAvX3n5Dc1zJ
1463Please respect copyright.PENANA1FNexFgsqY
而臭狐是否由這細菌引起或有份參與,文中並沒有提及。1463Please respect copyright.PENANAaVgg2Kl619
1463Please respect copyright.PENANAiuycrvlfuQ
1463Please respect copyright.PENANAOInsqH42V8
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。1463Please respect copyright.PENANA7Ac675VIqI
1463Please respect copyright.PENANAoLb0zqUyOl
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/toc1463Please respect copyright.PENANA9RS0EEDzzp
1463Please respect copyright.PENANARmKlcTHv8X
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。1463Please respect copyright.PENANAgmMawfSkMM
1463Please respect copyright.PENANAAFS3WXH41z
Link:1463Please respect copyright.PENANAToHWOEkxyX
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1463Please respect copyright.PENANAfIAJhdNjC9
1463Please respect copyright.PENANAbMRpijpmPL
1463Please respect copyright.PENANAuTlVEiJYaH
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1463Please respect copyright.PENANARbk8ukWCsV
1463Please respect copyright.PENANAhnnHZ7ohsp
Ref1:https://www.nature.com/articles/s41598-020-68860-z1463Please respect copyright.PENANAwXrJGdtpYZ
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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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