黑色的秀髮,最主要是由真黑素(Eumelanin)天然染成。362Please respect copyright.PENANABUgt8mBGvx
362Please respect copyright.PENANA9AKMgmMZLs
362Please respect copyright.PENANANGZfNQFZPX
362Please respect copyright.PENANAMGEXP4SlJP
(圖2)皮膚下的黑素細胞(Melanocyte)會製造出黑色粒子Melanosomes,而這些黑色粒子Melanosomes會走到表皮(Epidermis)或者髮囊(Hair follicile),賦予皮膚及頭髮黑色外表。362Please respect copyright.PENANA61X4WtRTQD
362Please respect copyright.PENANA8BHCPFwepF
362Please respect copyright.PENANAxquhd6RzNb
362Please respect copyright.PENANAG5I8pjoGN6
(圖3)圖中為Melanosomes裡頭的生物化學反應,起始材料為氨基酸,經過一輪酶素的化學反應後,最終成品將為黑色真黑素及啡色真黑素。362Please respect copyright.PENANAQ11AriFmpk
362Please respect copyright.PENANABI8xp2i2si
362Please respect copyright.PENANAJpikiCqS69
而根據兩者比例的不同,最終的顏色效果亦會有所不同,所以Melanosomes並不一定是純黑色,亦因而解釋了為何並不是所有人的頭髮也是漆黑黑一片。362Please respect copyright.PENANAHpFfJ0R7Hd
362Please respect copyright.PENANAtT7sJLRifG
值得留意的是,這一系列發生在Melanosomes的反應均是在中性pH7的環境下進行,有別於現時常用的鹼性pH化學染髮方式。362Please respect copyright.PENANACqdPBaB7pi
362Please respect copyright.PENANAdC0TVakB5m
有科學家看準這一點,因而嘗試照辦煮碗在體外套用我們自身Melanosomes蛋白酶的機制方式進行染髮(Ref1)。362Please respect copyright.PENANAo8BED21AHX
362Please respect copyright.PENANAWdKJlNQiTQ
362Please respect copyright.PENANAw5hrgCc79h
(圖4)從圖中可見,鹼性pH化學染髮以及中性pH7模仿人類Melanosomes裡頭生物化學反應方式染髮(2小時,攝氏35度),兩者最終的外表差別不大。362Please respect copyright.PENANAsG3LO2ft0I
362Please respect copyright.PENANAbAWs1U1Kjq
362Please respect copyright.PENANA0Ez2BiUHHD
而且經過5次清水沖洗及10分鐘的洗髮水猛烈沖洗後,兩者亦沒有出現脫色的現象。362Please respect copyright.PENANAyT0jwmfYoH
362Please respect copyright.PENANAC6BbVl83zY
只不過,利用鹼性pH化學染髮的話,色素會徹底進入髮質內部。362Please respect copyright.PENANARID4c1tRIk
反觀中性pH7生物化學反應方式染髮,色素主要聚集在髮質外部,因此對頭髮的傷害相對較低。362Please respect copyright.PENANAjYQ8bQmNDn
362Please respect copyright.PENANAtiv8YBwUHX
362Please respect copyright.PENANAQ09o3yqPaB
(圖5)在圖中亦可以清楚看得到,鹼性pH化學染髮對頭髮外部會做成傷害(箭嘴所指位置),362Please respect copyright.PENANAdH53x7KyFO
362Please respect copyright.PENANAQq0eZpj26p
362Please respect copyright.PENANAJQeL6gihCC
而中性pH7模仿人類Melanosomes裡頭生物化學反應方式染髮則沒有這個問題。362Please respect copyright.PENANAlC0aMKFfPy
362Please respect copyright.PENANA7nRG89VXNi
此方法能否在日後淘汰鹼性pH化學染髮或其他的染髮手段,我們將可拭目以待。362Please respect copyright.PENANA1CkjARLGdE
362Please respect copyright.PENANAKMVjwa7nSr
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。362Please respect copyright.PENANA6H3wlwBTc7
362Please respect copyright.PENANAkGNVGiOUHa
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/toc362Please respect copyright.PENANAeW7sE0snkb
362Please respect copyright.PENANAs3dW6aClK1
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。362Please respect copyright.PENANAjVkFkjaWWr
362Please respect copyright.PENANAb6Bf4gBM7K
Link:362Please respect copyright.PENANA4vdCW5Gpoz
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio362Please respect copyright.PENANAogmE5fqdd6
362Please respect copyright.PENANAtFLxASEwYB
362Please respect copyright.PENANAT9y38zMHfU
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。362Please respect copyright.PENANALC95XIN2yq
362Please respect copyright.PENANAPWZsc8egFe
https://www.instagram.com/potatopigtongue/362Please respect copyright.PENANA3YPMn3lRJ5
362Please respect copyright.PENANA3XktkThVsX
362Please respect copyright.PENANALgLJJX9rRL
Ref1:https://pubs.acs.org/doi/pdf/10.1021/acs.chemmater.0c02790
00
ns 172.69.58.116da2