oughthe"primordialgermcellsanimalembryonicstemcellsandcloningresearch,"experimentalsubjectssuccessfullyclonedtwosmallwhiterabbit-"lu-sing"and"luon."theexperimentshowsthatchinahassuccessfullymasteredtheclonedembryos,althoughnottechnicallymeetthesomaticcellclonedsheep"dolly"level,butitisforchina'scloningtechnologylaidthefoundationforprogress. ,chinainstituteofanimalreproduction,guangxiuniversity,thesuccessofbreedingrabbitsshapethanordinarycloninglargerabbit.becauserabbitandhumanphysiologymoresimilartothesuccessfulbirthofclonedrabbitandhelphumanmedicalresearch. 3,2002yearsmay27,chinaagriculturaluniversityandbeijinggenetechnologyco.,ltd.andhebeifarms蘆台throughsomaticcellcloningtechnology,thefirstsuccessfullyclonedthefirsthigh-qualitycattle-bovineerythroidji-nan.thisisthefirstcalled"beauvoir"thesomaticcellclonedcattleidentifiedbytheauthoritativedepartments,andsomeindicatorsofcloningtechnologytomeetinternationalstandards.niuji-nanistheuniquequalityofourlocalcattlebreeds,arelocatedinchina'shebeiprovince,themaincharacteristicsofcoldmeatlessgreasy.however,thenumberfellsharply,havebeenthreatenedwithextinction.thesuccessfulcloningofendangeredspeciestheprotectionofourcountryhavefar-reachingimplications. 4,2002yearatnoononoctober16,china'sfirstuseoftechnologytoproducevitrificationofbovinesomaticcellcloninginliangshancounty,shandongprovince,wasborn. thisisthefirstclonedbovinenucleardonoranannualoutputoffreshmilkfrommorethan10tonsofhigh-qualityblackandwhitedairycattleearskinfibroblasts.aftercloningofembryosaftervitrificationluxicattletransplantedintoabody,after281daysinat11:52onoctober16,2002outputsahealthyholstein.thisisthefirstclonedcowwasbornweighing40kg,height80cm,72centimetersinlength,chestcircumference80centimeters,11.5centimeterswaitube.daycolostrum14:20,14:30tostartstandingforthenighttoask,tobed,tojump,withnormalsignsofthesamecowwasborn.thisisthefirstuseofvitrificationtechnologytoproducethefirstofthefirstsomaticcellclonedcattle.priortothis,chinahasusedthefreshembryotransfertechnology,hasbeensuccessfullyclonedusingfrozenprecedent. ancientmythology,themonkeykingintotheirowncountlesssmallhairsofthebizarrestoryofthemonkeykingtoexpresstheyearningofmankindforself-replicationoftheillusion.in1938,germanscientistsfirstproposedtheideaofcloningamammal,in1996,somaticcellclonedsheep"dolly"wasborn,thecloningoftheworldisrapidlybecomingthefocusofattention,peoplecannothelpbutdoubt:wewillnotbeinthebackofsheep?questionsforallofthisfear.however,thenoisyvoiceagainsthumancloninghavenotarrivedinpursuitofscientists,alongwithcattle,mice,pigsandevenmonkeysandhumanbiologicalcharacteristicsthataremostsimilartotheprimateshavebeenclonedsuccessfully,peoplehavebelievedthatoneday,scientistswilluseahumancellreplicationtoprovidecellswiththesamepeoplewho,humancloningisnotthedreamofsciencefiction,butall-too-apparentreality.atpresent,therearethreeforeignorganizationswillbeformallyannouncedtheirhumancloningexperiments,thedavosuniversityofkentuckyprofessorwhoisworkingwithitalianexperts名叫安提connollyco-operationplanintwoyearstocloneaperson. duetothecomplexityofhumancloningmayhaveconsequences,somedevelopedcountriesinbiotechnology,arenowprohibitedtotaketheattitude,orseverelyrestricted.clintonsaid:"theadoptionofthistechnologytocopyhumanbeingsisdangerousandshouldbeputanend!"membersofthecppccnationalcommittee,chineseacademyofsciences,thenationaldirectorofthecenterforgeneresearchhongguo-fanalsomadeitclearthatoppositiontohumancloningresearch,andinfavorofcloningandcloningdistinguishbetweenpeople. humancloning,suchaspandora'sboxisreallythedevil,asfrightening? infact,peoplecannotaccepthumancloningexperimentsthemainreasonisthattheconceptoftraditionalethicalobstacles.forthousandsofyears,humanbeingshavebeenguidedbywayofsexualreproduction,andhumancloningisaproductofthelaboratorywascreatedbythemanipulationoflife.especiallyinthewest,"abandonedtogod,detachmentoftheadamandeve"ofcloning,butalsobyanumberofreligiousorganizations.moreover,humancloningandhumancloningwasalsocontrarytotherelationshipbetweenthetraditionalkinshipbybloodtodeterminetheethicalway.allthismakeshumancloningcannotbeethicalandmoraltraditionsofhumanitytofindasuitableshelterinplace.however,asthechineseacademyofscienceshesaid:"theemergenceofhumancloningshouldfaceuptoethicalissues,butthereisnoreasontoopposetheprogressofscienceandtechnology."owndevelopmentofhumansocietytellsusthatpeople'sconceptoftechnology-drivenupdateoftheprogressofhistory,andtotheoldconceptstoscientificandtechnologicaldevelopmentconstraints,itisrigid.historyofbloodtransfusionandorgantransplantation,haveagreatethicalcontroversy,andwhenthefirsttest-tubebabywasbornin1978,theyaresetoffanuproar,butnow,peoplehavebeenabletocorrectlydealwithallthis.thisshowsthatscientificandtechnologicaldevelopmentinthefaceofup-to-dateideasanddonotbringdisastertohumanbeings,onthecontrary,itisthebenefitofmankind.onthecloningtechnology,th << 上一页 [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] ... 下一页 >>
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