考研英語歷年真題來源報刊閱讀100篇text3

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1、大家網(wǎng)[www.TopSage.com]考研英語歷年真題來源報刊閱讀100篇Text3　AmeatyquestionNO.3　　IFYOUhaveeverlongedforameatsubstitutethatsmeltandtastedliketherealthing,butdidnotinvolvekillingananimal,thenyourordercouldbereadysoon.Researchersbelieveitwillsoonbepossibletogrowculturedmeatinqua

2、ntitieslargeenoughtoofferthemeatindustryanalternativesourceofsupply.　　Growingmusclecells(themaincomponentofmeat)inanutrientbrothiseasy.Thedifficultyispersuadingthosecellstoformsomethingthatresemblesrealmeat.PaulKosnik,theheadofengineeringatafirmcalledTissueGe

3、nesis,ishopingtodoitbystretchingthecellswithmechanicalanchors.Thisencouragesthemtoformsmallbundlessurroundedbyconnectivetissue,anarrangementsimilartorealmuscle.　　RobertDennis,abiomedicalengineerattheUniversityofNorthCarolina,believesthesecretofgrowinghealthym

4、uscletissueinalaboratoryistounderstandhowitinteractswithitssurroundings.Innature,tissuesexistaselementsinalargersystemandtheydependonothertissuesfortheirsurvival.Withoutappropriatestimulifromtheirneighbourstheydegenerate.DrDennisandhisteamhavebeenworkingonthe

5、seneighbourlyinteractionsforthepastthreeyearsandreportsomesuccessinengineeringtwoofthemostimportant-thosebetweenmusclesandtendons,andmusclesandnerves.　　AttheTouroCollegeSchoolofHealthSciencesinNewYork,MorrisBenjaminsonandhisteamareworkingonremovinglivingtissu

6、efromfish,andthengrowingitinculture.Thisapproachhastheadvantagethatthetissuehasafunctioningsystemofbloodvesselstodelivernutrients,soitshouldbepossibletogrowtissueculturesmorethanamillimetrethick-thecurrentlimit.　　HenkHaagsman,ameatscientistattheUniversityofUt

7、rechtintheNetherlands,istryingtomakemincedporkfromculturedstemcellswiththebackingofStegeman,asausagecompany.Itcouldbeusedinsausages,burgersandsauces.　　Butwhywouldanyonewanttoeatculturedmeat,ratherthansomethingfreshlyslaughteredandjustoffthebone?Oneanswer,tomi

8、xmetaphors,isthatitwouldallowvegetarianstohavetheirmeatloafandeatittoo.Butthesausagemeatprojectsuggestsanotherreason:hygiene.AsIngridNewkirkofPETA,ananimalrightsgroup,putsit,"noonewhoco