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。1748Please respect copyright.PENANAmYSKKh7o0y
1748Please respect copyright.PENANAVMz0YDsDqs
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。1748Please respect copyright.PENANAyyvxyBZQua
1748Please respect copyright.PENANALLQqSf8V8r
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。1748Please respect copyright.PENANAYEUo5rgzpe
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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1748Please respect copyright.PENANACC6lSFD8Ij
(Apocrine Sweat Glands)1748Please respect copyright.PENANADXTKKjjQEB
1748Please respect copyright.PENANAmuX9jLhlgQ
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。1748Please respect copyright.PENANAOsesEbSOT5
1748Please respect copyright.PENANA61LktN4aAA
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1748Please respect copyright.PENANA0ww05DgQxD
1748Please respect copyright.PENANAAeOgD1AezZ
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1748Please respect copyright.PENANA5GbxK4rHih
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(圖2)下列三點為文中所找出的異味散發機制。1748Please respect copyright.PENANA5xYA6gZzWn
1748Please respect copyright.PENANA8Esi67wFx6
1.大汗腺釋出無味物質Cys-Gly-3M3SH。1748Please respect copyright.PENANAVmlNBYjdId
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2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1748Please respect copyright.PENANAVYzCpOXMVm
1748Please respect copyright.PENANAfGXWrN7bhh
3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1748Please respect copyright.PENANAy4LeCn8KQT
1748Please respect copyright.PENANAWp71Bo5Rro
換句話說,腋下的異味就是由這些細菌引致而成的。1748Please respect copyright.PENANAt28aIKdiJ5
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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。1748Please respect copyright.PENANAyzUGUvIs8b
1748Please respect copyright.PENANAxSlQaQsDpb
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。1748Please respect copyright.PENANAd7ZHjNkguW
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。1748Please respect copyright.PENANAmevheBBlUP
1748Please respect copyright.PENANAA0ZnPWwwPy
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;1748Please respect copyright.PENANAyomBmJwN92
1748Please respect copyright.PENANABoCcvu1eOR
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。1748Please respect copyright.PENANA8xNG7PXQEb
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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。1748Please respect copyright.PENANABksyLJ1BcG
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1748Please respect copyright.PENANA83M7Zle27U
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。1748Please respect copyright.PENANArUC8wtpYy9
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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/toc1748Please respect copyright.PENANALTnpqWuCxV
1748Please respect copyright.PENANASaY8icueKv
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。1748Please respect copyright.PENANA0JcgUuJit3
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Link:1748Please respect copyright.PENANA06C70ZUdhb
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1748Please respect copyright.PENANAOOxuDImAe0
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有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1748Please respect copyright.PENANAEmBDYWlQVw
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Ref1:https://www.nature.com/articles/s41598-020-68860-z1748Please respect copyright.PENANAdRJodoCzwf