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。1474Please respect copyright.PENANASTns1aeRee
1474Please respect copyright.PENANArDDmGXhgQV
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。1474Please respect copyright.PENANATIvjUsMyS1
1474Please respect copyright.PENANAXeA3nlRtIH
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。1474Please respect copyright.PENANAQHa7fsKBnh
1474Please respect copyright.PENANAln857iAcjR
1474Please respect copyright.PENANAcWUpEM9jxf
(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1474Please respect copyright.PENANABh7MIw0L1k
(Apocrine Sweat Glands)1474Please respect copyright.PENANAxKRWcb5UOZ
1474Please respect copyright.PENANAKb7FxS58SD
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。1474Please respect copyright.PENANANdpIhuni4b
1474Please respect copyright.PENANABwM2hdGwlp
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1474Please respect copyright.PENANAVXSTviZipE
1474Please respect copyright.PENANAxSj58RndhV
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1474Please respect copyright.PENANA6YuLFO9s1Z
1474Please respect copyright.PENANAQgy2mVBltN
1474Please respect copyright.PENANAkWm62Fu6iP
1474Please respect copyright.PENANAOzryLpzOGb
(圖2)下列三點為文中所找出的異味散發機制。1474Please respect copyright.PENANASHBhNt3qbm
1474Please respect copyright.PENANAUIhqUzVDFK
1.大汗腺釋出無味物質Cys-Gly-3M3SH。1474Please respect copyright.PENANAmQR8Vx6mYe
1474Please respect copyright.PENANAfoVO92R0bu
2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1474Please respect copyright.PENANAgl9pa8I3G2
1474Please respect copyright.PENANA1Z4sugsjVy
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1474Please respect copyright.PENANAq4MV6jA7ZE
1474Please respect copyright.PENANA4cJwfo7aSe
換句話說,腋下的異味就是由這些細菌引致而成的。1474Please respect copyright.PENANAUpNrHTqv0U
1474Please respect copyright.PENANATK9FvcA2Mn
1474Please respect copyright.PENANApVbTtVYfrh
1474Please respect copyright.PENANA7yqoAr8UHK
(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。1474Please respect copyright.PENANA0kyUH8a20V
1474Please respect copyright.PENANA29jMDMTYU5
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。1474Please respect copyright.PENANAih9mFE8Q4j
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。1474Please respect copyright.PENANA6mpVAixUW5
1474Please respect copyright.PENANAkOPwpJLJHx
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;1474Please respect copyright.PENANA1t3Z8uqXAr
1474Please respect copyright.PENANAf49myPBzeo
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。1474Please respect copyright.PENANARQmt685SB9
1474Please respect copyright.PENANAoxd4WrOHLu
而臭狐是否由這細菌引起或有份參與,文中並沒有提及。1474Please respect copyright.PENANAD2fDsnvjHd
1474Please respect copyright.PENANAcaYqEp8y3F
1474Please respect copyright.PENANAboxMbLHUWi
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。1474Please respect copyright.PENANAg4vZ9A6dRy
1474Please respect copyright.PENANAWO3G8p2qOd
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/toc1474Please respect copyright.PENANAUzqF72qgSv
1474Please respect copyright.PENANA9CA9dLGQRT
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。1474Please respect copyright.PENANAMOB1CbHuvd
1474Please respect copyright.PENANAjumcCE1G7c
Link:1474Please respect copyright.PENANAHdTF7AUDoy
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1474Please respect copyright.PENANAEsmqANIYY7
1474Please respect copyright.PENANAbPIFm8cSKc
1474Please respect copyright.PENANAlccvKdAH2V
有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1474Please respect copyright.PENANAIA9EOxkclO
1474Please respect copyright.PENANAPdIbhBBzQg
Ref1:https://www.nature.com/articles/s41598-020-68860-z1474Please respect copyright.PENANAnuiM6j6W3P
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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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