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1、科学家分析出血玛丽鸡尾酒的配方更新日期：2011-03-3109:52 浏览:435次 所属分类：2011年03月科学美国人[提示:]双击单词，即可查看词义！坐在家里上美国大学-订购课程DVD·MP3下载·文本下载·返回列表·听力原文BloodyMaryGivesUpItsFlavorSecrets2011istheInternationalYearofChemistry.SoscientistsatthenationalmeetingoftheAmericanChemicalSocietyinAnaheimraisedaglas
2、s.(Orabeaker.)Andtheycelebratedasonlychemistscan—bycarefullyanalyzingitscontents.[NeilDaCosta,Flavorchemistryofthe"BloodyMary"cocktail]ThedrinktheydissectedwastheBloodyMary,perhapstheworld’smostchemicallycomplexcocktail.Amixoftomatojuiceandvodka,alongwithlemonorlime,horsera
3、dish,TabascoandWorcestershiresauces,blackpepperandcelerysalt,theBloodyMarypacksapunch.Anditlightsupnearlyourentirerangeoftastereceptors,givingussweet,salty,sourandsavory.TofindouttheBloodyMary’ssecret,researcherssharedonewithachromatograph,whichidentifiedthevariouscompounds
4、thatcontributetothedrink’sflavorandbouquet.Thescientiststurnedupplentyofantioxidants,aswellasafewbartendingtips.First,makeitfresh.Theacidsintomatojuicecandegradethedrink’sotheringredients.Also,makeitcold—iceslowsthedegradation.Usethebesttomatojuice—themajorsourceofflavor.Bu
5、tfeelfreetocheapoutonthevodka.Itstastegetslostinthecomplexmix.Inotherwords,chemistssaytosavetheGreyGooseforotherexperiments.—KarenHopkin废旧机油转化成汽油更新日期：2011-03-3010:27 浏览:458次 所属分类：2011年03月科学美国人[提示:]双击单词，即可查看词义！坐在家里上美国大学-订购课程DVD·MP3下载·文本下载·返回列表·听力原文 ChemistsTurnUsedMoto
6、rOilIntoGas Tokeepyourcarpurring,youhavetochangetheoil.Suchmaintenanceproduceseightbilliongallonsofusedmotoroilannually.Somewasteoildoesgetre-refinedtoproduceoilforlubricationorheating.Andsomejustgetsdumped.Soitwouldbemoreenvironmentallyfriendlyandprovidefreshfuelifwecouldc
7、onverttheoldmotoroiltosomethingreallyvaluable:newgasoline.Andthat’swhataresearchteamthinksthey’vedone.TheypresentedtheirworkattheannualmeetingoftheAmericanChemicalSociety.[SuShiungLam,AlanRussellandHowardChase,"Fromwastetovaluablefuel:Howmicrowave-heatedpyrolysiscanrecyclew
8、asteautomotiveengineoil"] Theirapproachinvolvespyrolysis,decomposingorganicmateria
