CornflakeCoin玉米片硬幣（典范6-12）1Thefind‘Look!’criedKerry.Shewasscrabblinginthelonggrass.‘Whatisit?’askedOmar.Itwaslunchtime,andKerryandOmarwereoutintheschoolfield.Kerryheldupsomethingroundandshiny.Itgleamedinthesun.‘It’sacoin!’shesaid.‘Itlooksreallyold.’‘Let’stakeittoMrHart,’saidOmar.‘Thenhe’llputitinforthecompetition.Youneverknow,youmightwin.’Thelocalnewspaperwasrunningacompetitionforschoolsinthearea.ThechildwhofoundtheoldestandmostexcitingtreasurewouldwinatripfortwotoSpaceFunPark.‘Youcanfindburiedtreasureanywhere,’thenewspaperhadsaid.‘Let’shavealookatthatcoin,’saidOmar.Omarspunitinhisfingers.‘Wow!’hesaid,‘itdoeslookold!’OmarpasseditbacktoKerrywhowasjumpingaboutwithexcitement.‘It’sarealtreasurecoin,’shegrinned.‘Comeon!’sheshouted.‘We’regoingtoshowthistoMrHartrightnow.’2Therealthing?MrHartwassittingathisdeskwhenKerryandOmarburstintotheclassroom.‘What’sgoingon?’askedMrHart,lookingup.‘Ijustfoundthisonthefield!’pantedKerry.‘Willyouenteritfortheburiedtreasurecompetition?’ShedroppedtheshinycoinontoMrHart’sdesk.MrHartrubbedthecoin.Thenhelookedatthewritingonit.KerryandOmarstaredathim.‘Ifyoulookattheedgeofthecoin,’hesaid,‘youcanseethewordsFunStart.’KerryandOmarlookedateachother.‘YoumeanlikeFunStart,thecereal?’askedKerry.MrHartnodded.‘Yes,Kerry.Thiscoinlooksreal,butit’sacopy.It’safreegiftfromacerealpacket.I’mreallysorry.’Kerryfeltherheartsink.MrHartsawherface.‘Cheerup,Kerry,’hesaid.‘There’splentyoftimetofindsomerealtreasurebeforethecompetitioncloses.’KerryandOmarwalkedbackacrosstheclassroom.Theywereabouttogooutwhentheyheardsomeonebehindthem.ItwasMattThorn.Hewasalwayssayingmeanthings.NowhewaslaughingatKerry.3CereallaughterThenextdayalltheclassknewaboutKerry’scerealpacketcoin.MattThornhadtoldeveryone.‘Kerrywantedtoenteracornflakecoininthetreasurecompetition!’Mattsmirked.Everyonelaughed,butMattlaughedtheloudest.‘That’senough,Matt,’saidMrHart.‘Don’tletMattbotheryou,’whisperedOmar,butKerryhadgoneredintheface.ShewasangrywithMattandcrosswithherself.Howcouldshehavebeensostupidtothinkthatthecoinwasrealtreasure?Overthenextfewdayseveryonetalkednon-stopaboutthetreasurecompetition.Lotsofchildrenbroughtinthingsthey’dfoundathomeorintheirgardens.Karabroughtinsomeyellowyoldphotos,BendugupanoldglassbottleandJasbroughtinanoldchildren’sbookwithagreencover.ThenMattThornshowedeveryoneawhiteandbluechinateacup.He’dtakenitoutofhisgran’scupboard.MrHartlookedattheteacupverycarefully.‘Thisisveryold,Matt,’hesaid.‘Ithinkit’sgotagoodchanceofwinningthecompetition.’Mattchuckledproudly.Kerryglaredathim.Therewasnowayshewasgoingtolethimwin.Attheendofthedayshehurriedoutofschool.‘Whatareyoudoing?’askedOmar,tryingtokeepupwithher.‘WehavetofindsomethingolderthanMatt’steacup,’Kerrysaid.Backhome,Kerryaskedhermumtotakethemtothepark.KerryandOmarlookedunderbenches,inbushesandnexttothefence.Theyfoundhalfapencilandanoldfootball.ThenKerryaskedhermumiftheycouldgodownbythecanal.‘Whatareyoutwoupto?’askedKerry’smum.‘Nothing,’saidKerry.Bythecanal,theylookedunderthebridgeandalongthepath.Theyfoundabrokendollandsixemptysweetpackets.Halfanhourlater,theywerebothtiredandfedup.‘Let’sgohome,’saidOmar.Kerrynoddedglumly.‘Let’sforgetaboutthestupidcompetition,’shesaid.4BarkerdigsforgoldAttheweekend,KerryandOmarwereintheparkhavingapicnicwithKerry’smumanddad.Kerrywasstillinabadmood.‘What’supwithyou?’askedhermum.Kerryshruggedhershoulders.‘I’mtakingBarkerforawalkbeforehedigsanymoreholes,’herdadsaid.‘Whydon’tyoutwocomewithme?’‘Don’tfeellikeit,’saidKerry.‘Comeon!’saidDad.‘Wecangoupthebighillwherethey’rebuildingthatnewcafé.’Kerrygroaned.ShestoodupandtookBarker’slead.Tenminuteslater,theywereatthetopofthehill.Therewasahuge,muddyholeinthegroundwherethecaféwasgoingtobebuilt.Dadwenttolookattheyellowdiggerparkedundersometrees.BarkersuddenlystartedhowlingandpullingawayfromKerry.Shedroppedhislead.Inasecondhehadraceddownintotheholeandstarteddigging.‘Maybehe’sfoundsomerealtreasure!’Kerryshouted.‘Ibetit’sjustanoldbone,’saidOmar.‘He’salwaysdiggingupsomething.’Barkerscrabbledaboutanddugupsomebitsofwood.ThenhetrottedovertoKerry.Therewassomethinginhismouth.ThelookofexcitementvanishedfromKerry’sface.‘Justourluck,’shegrumbled,‘it’sanotherofthosestupidcornflakecoins.’‘Let’skeepit,anyway,’saidOmar.‘Youcanifyouwantto,’shruggedKerry,handinghimthecoin,‘butI’vehadenoughofcornflakecoins.’Justthen,Kerry’sdadcalledthemover.Itwastimetogo.Omarslippedthecoinintohispocket.KerrygrabbedBarker’sleadandtheyallwentbackdownthehill.5Andthewinneris…OnFriday,MrHartpackedupallofthetreasurethattheclasshadfound.Heputitintoabigcardboardbox.‘Thecompetitionclosestoday,’hesaid.‘I’lldropthisoffatthenewspaperafterschool.Doesanyonehaveanythingelse?’Everyoneshooktheirheads.ThenOmarfeltacoininhisbackpocket.ItwastheoneBarkerhadfound.‘Kerry’sdogfoundthis,’hesaid,passingthecointoMrHart.‘It’sanothercornflakecoin!’calledMattThorn.Everyonelaughed.‘Whydidyouhavetobringthatout?’hissedKerrycrossly.Afewdayslater,thewholeschoolwaspackedintothehall.Atallwomanstoodup.‘MynameisClareFenton,’shesaid.‘I’mtheeditorofthelocalnewspaper.I’mverygladtotellyouthatsomeonefromthisschoolhaswonourburiedtreasurecompetition.’Therewasarippleofexcitementinthehall.EveryonelookedatMattThorn.They’dallheardabouthisteacup.Mattwasgrinningfromeartoear.Hewasgettingreadytocollecthisprize.‘Thewinneris…’saidtheeditor,‘KerryRobinson!KerryhasfoundarealRomancoin.’Thereweregaspsofsurpriseandtheneveryonebeganclapping.Kerrystoodupinshock.ShegrabbedOmar’selbow.‘You’recomingwithme,’shesaid.TheonlypersonnotclappingwasMattThorn.‘Welldone!’beamedtheeditor.‘Youwillbeonthefrontpageofournewspaperthisweek!’TheeditorhandedKerrytheticketsforSpaceFunParkandsmiled,‘MrHartsaidyourdogBarkerfoundthecoin.’‘Barkerfoundit,’repliedKerry,‘butOmarhelpedtoo.Hestoppedmethrowingitaway.Ithoughtitwasacornflakecoin.’‘Well,it’sagoodthingthatBarkerknewwhatitwas,’laughedtheeditor.‘IthinkheandOmarshouldbeonthefrontpage,too,don’tyou?’Onthewaybacktoclass,everyonewantedtotalktoKerryandOmar.MattThornwalkedbehind,hisfacelookinglikeathundercloud.MrHartsmiledatKerry.‘Barkerduguptherealthing,didn’the?’‘Yes,’Kerrynodded.‘It’sagoodthingheknowsthedifferencebetweenatreasurecoinandacornflakecoin.’ShelookedatOmarandtheybothgrinned.產(chǎn)品簡介：1.MTT細(xì)胞增殖及細(xì)胞毒性檢測試劑盒(MTTCellProliferationandCytotoxicityAssayKit)被廣泛應(yīng)用于細(xì)胞增殖和細(xì)胞毒性的實(shí)驗(yàn)方法。由于細(xì)胞活力與細(xì)胞數(shù)呈正相關(guān)，因此常常用來檢測細(xì)胞的增殖情況。MTT可以被線粒體內(nèi)的一些脫氫酶還原生成結(jié)晶狀的深紫色產(chǎn)物formazan。在特定溶劑存在的情況下，可以被完全溶解。然后通過酶標(biāo)儀可以測定570nm波長附近的吸光度。細(xì)胞增殖越多越快，則吸光度越高；細(xì)胞毒性越大，則吸光度越低。2.本試劑盒采用了獨(dú)特的Formazan溶解液配方，無需去除原有的培養(yǎng)液，可以直接加入Formazan溶解液溶解formazan。從而避免了由于去除培養(yǎng)液時formazan被部分去除而引起的誤差。3.本試劑盒背景低，靈敏度高，線性范圍寬，使用方便提高了可靠性。4.本產(chǎn)品為500次（5個96孔細(xì)胞培養(yǎng)板）操作。產(chǎn)品內(nèi)容：MTT染色液5mlFormazan溶解液55ml說明書1份保存條件：MTT染色液需-20℃避光保存；Formazan溶解液可以室溫保存