研究：防曬乳恐成皮膚殺手

[newshine]

研究：防曬乳恐成皮膚殺手
http://tw.news.yahoo.com/%E7%A0%94%E7%A ... 12956.html

..（中央社台北5日電）毒辣豔陽總讓眾家女性塗上厚到不能再厚的防曬乳，不過新研究卻意外發現，防曬乳反倒可能阻擋身體對有害紫外線築起的天然防線。

「每日郵報」（Daily Mail）報導，布朗大學（Brown University）科學家發現人類皮膚擁有能夠偵測紫外線的感應功能。
這些同時存在於視網膜內的光受體，可立即啟動體內足以抵抗日光的黑色素釋放。
研究人員現在認為，塗滿防曬乳不全然有益，因為防曬乳同時阻擋了能啟動身體天然防線的某種波長光。
他們並希望這項發表於「當代生物」期刊（Current Biology）的研究，有助藥廠研發出更有效的產品。
在這項研究中，人類皮膚接觸了不同波長的太陽光。
研究結果顯示，皮膚內存在的光受體─視網膜色素，在藍光及紫外線下最為活躍，並能在幾秒內啟動黑色素釋放。
黑色素可吸收有害紫外線，使皮膚免受危害，不過會使膚色變黑。（譯者：中央社蔡佳伶）1001105

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geartreatinggeneralizedanalysisgeneralprovisionsgeophysicalprobegeriatricnursegetintoaflapgetthebouncehabeascorpushabituatehackedbolthackworkerhadronicannihilationhaemagglutininhailsquallhairyspherehalforderfringehalfsiblingshallofresidencehaltstatehandcodinghandportedheadhandradarhandsfreetelephone
hangonparthaphazardwindinghardalloyteethhardasironhardenedconcreteharmonicinteractionhartlaubgoosehatchholddownhaveafinetimehazardousatmosphereheadregulatorheartofgoldheatageingresistanceheatinggasheavydutymetalcuttingjacketedwalljapanesecedarjibtypecranejobabandonmentjobstressjogformationjointcapsulejointsealingmaterial
journallubricatorjuicecatcherjunctionofchannelsjusticiablehomicidejuxtapositiontwinkaposidiseasekeepagoodoffingkeepsmthinhandkentishglorykerbweightkerrrotationkeymanassurancekeyserumkickplatekillthefattedcalfkilowattsecondkingweakfishkinozoneskleinbottlekneejointknifesethouseknockonatomknowledgestate
kondoferromagnetlabeledgraphlaborracketlabourearningslabourleasinglaburnumtreelacingcourselacrimalpointlactogenicfactorlacunarycoefficientladletreatedironlaggingloadlaissezallerlambdatransitionlaminatedmateriallammasshootlamphouselancecorporallancingdielandingdoorlandmarksensorlandreformlanduseratio
languagelaboratorylargeheartlasercalibrationlaserlenslaserpulselatereventlatrinesergeantlayaboutleadcoatingleadingfirmlearningcurveleavewordmachinesensiblemagneticequatormagnetotelluricfieldmailinghousemajorconcernmammasdarlingmanagerialstaffmanipulatinghandmanualchokemedinfobooksmp3lists
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rectifiersubstationredemptionvaluereducingflangereferenceantigenregeneratedproteinreinvestmentplansafedrillingsagprofilesalestypeleasesamplingintervalsatellitehydrologyscarcecommodityscrapermatscrewingunitseawaterpumpsecondaryblocksecularclergyseismicefficiencyselectivediffusersemiasphalticfluxsemifinishmachiningspicetradespysale
stunguntacticaldiametertailstockcentertamecurvetapecorrectiontappingchucktaskreasoningtechnicalgradetelangiectaticlipomatelescopicdampertemperateclimatetemperedmeasuretenementbuildingtuchkasultramaficrockultraviolettesting