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。1641Please respect copyright.PENANAFLUb56PLTa
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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。1641Please respect copyright.PENANAKk53MSQAm8
1641Please respect copyright.PENANALrIZFkpeTw
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。1641Please respect copyright.PENANArqNnnekcLK
1641Please respect copyright.PENANAVYuZNjxXWd
1641Please respect copyright.PENANASHH8rwrSaS
(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1641Please respect copyright.PENANALLerZsaMsX
(Apocrine Sweat Glands)1641Please respect copyright.PENANAq15VfiOwqL
1641Please respect copyright.PENANANcpkwiDfcz
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。1641Please respect copyright.PENANASc011m9vCM
1641Please respect copyright.PENANAVwa2K7j02q
外分泌汗腺的主要功能就是散發汗水幫助散熱,調節體溫。1641Please respect copyright.PENANA4GKbzcwtQl
1641Please respect copyright.PENANArE1PhZJENE
而大汗腺的主要功能,到目前為止仍未能搞得清楚。1641Please respect copyright.PENANAnbmDJg9tX8
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(圖2)下列三點為文中所找出的異味散發機制。1641Please respect copyright.PENANAoNKwImaB62
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1.大汗腺釋出無味物質Cys-Gly-3M3SH。1641Please respect copyright.PENANAO0uGAdpfBs
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2.腋下某品種的葡萄球菌消化Cys-Gly-3M3SH。1641Please respect copyright.PENANAqsnWVVuKge
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3. 葡萄球菌消化過後,吐出帶有異味的3M3SH。1641Please respect copyright.PENANAHOgTt7fPoo
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換句話說,腋下的異味就是由這些細菌引致而成的。1641Please respect copyright.PENANALaJXWtedRJ
1641Please respect copyright.PENANAEn63PFVZej
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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。1641Please respect copyright.PENANAigKEYwrEVq
1641Please respect copyright.PENANAjwfJnYty7h
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。1641Please respect copyright.PENANAkmJI65tx1t
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。1641Please respect copyright.PENANADqTl0gbyJ5
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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;1641Please respect copyright.PENANAccmijLl1op
1641Please respect copyright.PENANAH0zsibazNa
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。1641Please respect copyright.PENANA5Hyarl8sRG
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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。1641Please respect copyright.PENANA4aH6UrXERN
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1641Please respect copyright.PENANAwncw4j9zAZ
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。1641Please respect copyright.PENANAkhznsVzb8x
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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/toc1641Please respect copyright.PENANAYfcOFRXIkf
1641Please respect copyright.PENANADhNm2X3yUC
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。1641Please respect copyright.PENANAmbyoytIJRq
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Link:1641Please respect copyright.PENANAbUIlsxGzuv
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1641Please respect copyright.PENANAoMjlR4Lvnw
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有興趣接收科普資訊的話,歡迎follow IG: potatopigtongue。1641Please respect copyright.PENANAyVRLHpJuBb
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Ref1:https://www.nature.com/articles/s41598-020-68860-z1641Please respect copyright.PENANAM1w8yzyWma