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href="http://www.cdcfah.com/cp/third-huagong_qtfltz/">其他未分類</a>?石家莊維生素C乙基醚廠家供應服務至上上海北倉化工科技供應</p><div id="nvw8cxt" class="leftbox clearfix"><h1>石家莊維生素C乙基醚廠家供應服務至上上海北倉化工科技供應</h1><div id="jmiex3y" class="proBig"><div id="w72neuv" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788700253906/6677097.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ndug8dp" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788700253906/6677097.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="e8m7o3r" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>石家莊維生素C乙基醚廠家供應,維生素C乙基醚</p><p><span>***更新：</span>2021-01-02 00:23:52</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wrsdlr2" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海北倉化工科技有限公司</a></p><p><span>聯(lián)系人：</span>王金良</p><p><span>郵箱: </span>shbeicang@vip.126.com</p><p><span>電話: </span>18516286991</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.shbeicang.cn</p><p><span>手機: </span>021-60459206</p><p><span>地址: </span>金山大道4168號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="kieukfb" class="page-proshow02"><p class="title">詳細說明</p><div id="cpubrsn" class="box"><p><p style="text-indent:25px">每天會我們的皮膚都會流失部分水分，再加上紫外線的侵襲、冷氣房及壓力等因素，將會導致肌膚生理失調，膚質暗沉無光且容易老化。然白皙無暇的肌膚即是美麗的象征，石家莊維生素C乙基醚廠家供應，因此美白是廣大愛美女士每天必須要做的事情，石家莊維生素C乙基醚廠家供應，石家莊維生素C乙基醚廠家供應。維生素C乙基醚在化妝品的應用非常廣范，不僅可以美白、氧化還原、還可促進膠原蛋白增生?，F(xiàn)在我們就看看維生素C乙基醚的這些功效。表皮細胞中，自然存在著酪氨酸，這是麥拉寧的前身，當我們的肌膚受到紫外線照射后，就會自動引發(fā)一連串的反應，將酪氨酸變成麥拉寧，即所謂的黑色素。在這個反應中有一個很關鍵的物質--酪氨酸酶。酪胺酸經(jīng)酪胺酸脢的催化作用后形成多巴；然后再次由酪氨酸酶?將多巴轉變成多巴醌，接著會自氧化產(chǎn)物為黑色素。維生素C乙基醚在PH值3.0-6.0的環(huán)境中更穩(wěn)定。石家莊維生素C乙基醚廠家供應</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊維生素C乙基醚廠家供應,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788700253906/6677097.png"></div><p style="text-indent:25px">維生素C乙基醚進入皮膚后會轉化為VC，對皮膚有比較好的效果。1.促進膠原蛋白的合成。在膠原蛋白合成的過程中，維生素C乙基醚的還原性可以刺激合成膠原蛋白過程中需要的酶。2.可以阻斷黑色素生成。維生素C乙基醚具有還原性，可以阻斷酪氨酸酶的產(chǎn)生，可以在多巴形成黑色素過程中影響黑色素生成，可以在黑色素凝聚使皮膚著色過程產(chǎn)生影響。就是說，即使第一階段有漏網(wǎng)之魚，維生素C乙基醚還會在后面階段守株待兔。3.還原已生成的黑色素。原理同樣是利用其還原性。4.中和自由基自由基會影響蛋白質活性，會破壞細胞膜，使皮膚老化惡化，嚴重時候也會影響皮膚細胞內(nèi)的DNA。而維生素C乙基醚中和自由基的能力十分強悍。石家莊維生素C乙基醚廠家供應含有維生素C乙基醚的產(chǎn)品不建議敏感肌膚每天使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊維生素C乙基醚廠家供應,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788920253906/3690018.png"></div><p style="text-indent:25px">VC之所以重要，是因為其強大的抗氧化和美白能力。不過原型VC缺點也很明顯：穩(wěn)定性差，打開后要盡快使用完；吸收也差，要pH值低的條件下足量添加，因而刺激性也比較大，并不是每一個人都有福氣享用。各類VC衍生物的不斷出現(xiàn)，就比如維生素C乙基醚的出現(xiàn)則解決了原型VC的缺點和問題。說到VC衍生物和VC類美白產(chǎn)品，離不開研發(fā)人員的功勞。早在上世紀60年代，伴隨生活水平的提升，女性對美白的需求開始迅速增加，再加上科技實力的提升，當時研究美白化妝品簡直是黃金時期——既有技術又有市場。</p><p style="text-indent:25px">含有維生素C乙基醚的產(chǎn)品不建議敏感肌膚每天使用：如果肌膚非常敏感，那在使用含有高濃度維生素C乙基醚的產(chǎn)品前，建議先在局部使用以確定耐受性，如果肌膚沒有出現(xiàn)刺痛，持續(xù)泛紅的情況，就可以全臉使用，但要避開眼周。為了更好的讓肌膚適應這個有效的成分，剛開始建議隔天使用，一周后每天夜間使用一次即可，直到肌膚沒有任何不適感就可以早上也用了。含有高濃度維生素C乙基醚的產(chǎn)品不僅美白還能抗老：維生素C乙基醚是一種強抗氧化劑，能夠有效阻礙酪氨酸酶，防止肌膚變黑，淡化斑點，改善暗沉，這也是大家對于維生素C乙基醚都知道的護膚作用，不過，除了美白之外，含有高濃度維生素C乙基醚的產(chǎn)品還有對抗自由基，刺激膠原蛋白生成的效果，能改善紋路和肌膚彈性，讓肌膚看起來更加年輕。維生素C乙基醚是親油親水兩性物質，這有效的擴展了他的適用范圍。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊維生素C乙基醚廠家供應,維生素C乙基醚" src="https://tyunfile.71360.com/UploadFile/shbeicanghuagong/637326788904160156/3342028.png"></div><p style="text-indent:25px">目前應用較多的維生素衍生物是:維生素C葡糖苷、維生素C磷酸酯鎂、維生素C乙基醚、維生素C磷酸酯鈉。維生素C乙基醚中維生素C的含量比較高，而分子量比較小，且既水溶又油溶, .更有利于進入皮膚，吸收好。相同維生素C衍生物含量，其中當含量< 0.01%時，黑色素的含量%，比較:維生素C磷酸鈉>維生素C磷酸酯鎂>維生素C糖苷>維生素C乙基醚:當含量>0.01%時，黑色素的含量%，比較:維生素C磷酸鈉>維生素C糖苷>維生素C磷酸酯鎂>維生素C乙基醚?？梢姡嗤S生素C衍生物的含量中，維生素C乙基醚中黑色素含量比較低，說明維生素C乙基醚能夠有效阻礙酪氨酸酶活性，能夠更好的阻礙黑色素，具有更好的美白功效。傳統(tǒng)的維生素C乙基醚生產(chǎn)方法整體工藝復雜,成本高,產(chǎn)品的收率低,急需要在生產(chǎn)工藝上進一步進行改良。石家莊維生素C乙基醚廠家供應</p><p style="text-indent:25px">維生素C乙基醚在PH值 3.0-6.0的環(huán)境中更穩(wěn)定。石家莊維生素C乙基醚廠家供應</p><p style="text-indent:25px">維生素C乙基醚是維生素C一種衍生類，為白色結晶或結晶性粉末，無臭，味酸，久置色漸變微黃。本品在水中易溶，呈酸性，在乙醇中略溶，在三氯甲烷或**中不溶。維生素C分子結構中具有烯二醇結構，C2-OH由于受共軛效應影響，酸性極弱(pK2=11.57)，C3-OH酸性則較強(pK1=4.17)，故維生素一般表現(xiàn)為一元酸，可與碳酸氫鈉作用呈鈉鹽。維生素C分子結構中含有2個手性碳原子，因而具有旋光性。依法測定(ChP2015通則0621)，含本品0.10g/ml的水溶液的比旋度為+20.50°~+21.50°。分子結構中的烯二醇基具有極強的還原性，易被氧化成二酮基而成為去氫抗壞血酸，去氫抗壞血酸在堿性溶液或強酸性溶液中可進一步水解生成二酮古洛糖酸而失去活性。石家莊維生素C乙基醚廠家供應</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2661240.html</p></div></div></div></div></div><div id="l3tryuv" class="page-right twoColRt"><div id="rk38u53" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="fjfqcye" 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