生物医学工程外文翻译高能磁场刺激对蟾蜍心脏搏动影响的生物学研究.docx

生物医学工程外文翻译高能磁场刺激对蟾蜍心脏搏动影响的生物学研究.docx

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生物医学工程外文翻译高能磁场刺激对蟾蜍心脏搏动影响的生物学研究

中文3890字

附录Ⅳ英文文献及翻译

BiologicaleffectsoftheMagneticStimulationontheToadHeart

HongweiLei,YuyuanDu,YinaLi,ChunlingLiu,XuWan

2007IEEE/ICMEInternationalConferenceonComplexMedicalEngineering-CME2007

InstituteofBiomedicalEngineering,NortheasternUniversity,Shenyang,Liaoning110004,P.R.CHINA

Abstract-Westimulatedtheexposedtoadheartbyalowfrequencyandhighenergymagnetic.Byanalyzethedataofthisexperiment,itshowsthatthepulsatingoftheweaktoadheartwouldmakechangeafterstimulatedbymagnetic.Weakheartbeatstrengthened,thesinglepeakcurvewouldbecomethetwopeakscurvewithatriawaveandventriclewaveafterthemagneticstimulation.Butthecyclingofrhythmicpulsatilecurveoftoaddoesn'tchange.

I.INTRODUTION

Alllifeformshavemagnetism.Allkindsofmagneticfieldwouldhavesomeeffectsontheconfigurationandactivitiesoflifeformsthatwhicheverenvironmentalmagnetic,additionalmagneticorinsidemagneticoforganism.Thebiologiceffectsarerelatedtothecharacteristicsandtheintensionofthemagneticfield,aswellasthespeciesandthetissuesofthelifeforms.

Theexperimentationshowedthatmagnetismstimulationinsomerangewouldcontrolthegrowthofrattumour,whatevertheyareinoroutthebody.Muchmoretheycaninducethecancercellsdead.30mTmagneticstimulationwouldincreasethecontentofNOintheliverandthekidney.Magneticalsocanimprovetheactivityofsomeenzymeandpromotetheregenerationofnervetissue.Cellwouldincrease,theboneswouldbeconcrescence,thescarwouldberehabilitate.Thebloodrheologyandbloodcellnumberbothofhumanandratwouldchangeobviously,DIthebloodmucositywouldbelow.

Heartisthemostimportantapparatusoflife.Itpulsatesdayandnight.Heartoncestoppulsating,thelifefordanger.Numerousscholarpaysattentiontotheroleofmagneticfield.Buttheyjuststudiedtheeffectsofmagneticstimulationoftheheartpacemaker.Theexperimentsaboutdirecteffectsofstimulateheartbymagneticisveryfew.

Thetoadsareourexperimentanimals.Westimulatedandnotedbythemagneticstimulationequipmentandthenotedequipmentofpulsatilecurvemadebyourselves.Analyzetheresults.

II.STUFF

A.Experimentequipments:

①magneticstimulationequipment;（magneticintension8-10T,impulsewidth150ms,maximalstimulationfrequency5Hz）;②softwareofnotedpulsatilecurve

（madebyourselves）;③cardiomusculartransducer;④Ringer.Sol;⑤Batrachiainstruments;⑥clipoffrogheart;⑦cottonthread;®burette.

B.Experimentanimals:

toads.

III.METHOD

A.Destroythebrainandthespinalcordofthetoadbystylet:

Penetrateintotheoccipitalapertureuprightwithstylet,destroyedthebrainupwards,takebackthestyletanddestroythespinaldownwards.Ifthelimboftoadwererelaxed,itshowedthatthebrainandspinalweredestroyedcompletely.

B.Exposethetoadheart:

Makethetoadlyingonitsbackonthewindingcenter.Themagneticaspectisuprightthroughthetoadheart.Cuttheventralskinoftoad,snipthebreastbone,exposetheratheart.Nipthehearttipbyclipcarefully.Makethecottonthreadtiedwiththeclipoffroghearthelinkedwiththecardiomusculartransducer.Donotmakethetoadheartleavethorax,oritwoulddisturbtheexperimentresults.

C.Notedtheresult:

Connectthecardiomusculartransducerwiththecomputer.Takenotesthecurveoftoadheartwithoutgivingthestimulateofmagneticfield

D.Afterthreeminutes,notedtheweakpulsatilecurve.

E.Makethemagneticintension10T,electricize10s.Stimulatethetoadheartandrecordthepulsatilecurve.

IV.RESULTS

Theabscissaofcardiacrhythmicpulsatilecurveistime,theordinateisconstrictionpower.Takenotesforthepulsatilecurveoftoadheartthatexposedjust.Wecanknowtherhythmicpulsatilecycleofthetoadheartis1.5sfromfig1whichshowthecardiacrhythmicpulsatilecurveofthetoadwhichwasexposedtheheartjustnow.Therearetwowavesineachcycle,oneisatriawave,theotherisventriclewave.Theatriawaveis0.5sandtheventriclewaveis1.0s.Theconstrictionpowerofatriaislessthanthatofventricle.Theamplitudeofconstrictionpowerofventricleisthe2timesoftheatria.

Fig.4.1.Itisrhythmicpulsatilecurveofthetoadwithoutmagneticstimulation.

Theconstrictionpoweroftoadheartwouldbecomeweakerafterthetoadheartwasexposedforawhile.Atthesametime,atriumwaveandventriclewavecannotbealreadydistinguished.Heartcontractingamplitudewerereducedobviously,donotgotothehalfoforiginalatriumwave.Therhythmicpulsatilecycleofthetoadheartisstill1.5s.

Fig.4.2.Itistheweakpulsatilecurveoftoadwithoutmagneticstimulation.

Butwecandistinguishtheatriawaveandtheventriclewaveagainaftergivingthetoadheartamagneticstimulationonfollowingpicture.Andtheamplitudeofventriclewavesismorethanthatofthesinglewave.Therhythmicpulsatilecycleofthetoadheartisstill1.5s.

Thereweresixtoadsasexperimentanimalinourexperiment.Afterexposingheartatime,therhythmicpulsatilecurveallbecamesinglepeakcurve.Stimulatethemwhenthesingleamplitudewas0.95.Notedthedataandanalyzethem.

Followingisthepulsatilecurveofthesixtoadsrecordedwhichwerestimulatedbymagneticfield.

Fig.4.3.Itisthepulsatilecurveofthefisttoadwhichheartwasstimulatedbymagneticfield.

Fig.4.4.Itisthepulsatilecurveofthesecondtoadwhichheartwasstimulatedbymagneticfield.

Fig.4.5.Itisthepulsatilecurveofthethirdtoadwhichheartwasstimulatedbymagneticfield.

Fig.4.6.Itisthepulsatilecurveofthefourthtoadwhichheartwasstimulatedbymagneticfield.

Fig.4.7.Itisthepulsatilecurveofthefifthtoadwhichheartwasstimulatedbymagneticfield.

Fig.4.8.Itisthepulsatilecurveofthesixtoadswhichheartwasstimulatedbymagneticfield.

V.COMPARISIION

Recordventriclewaveamplitudeandatriumwaveamplitudeofthesixtoadsaftermagneticstimulation.

Table.5.1.From"Toad1"to"Toad6"expressedthesixtoadswhichwasstimulatedbymagneticfield.The"Toad0"expressedthetoadwhichwasnotstimulatedbymagneticfield."Toad7"expressedthetoadwhichpulsatedweakly.

amplitudesofatriawave

amplitudesofventriclewave

Toad0

2.275

2.34

Toad1

1.140

1.170

Toad2

1.120

1.129

Toad3

1.165

1.18

Toad4

1.120

1.128

Toad5

1.214

1.230

Toad6

1.151

1.169

Toad7

0.95

Expressthetoadwhichwasnotstimulatedbymagneticwith"Toad0",andexpressthetoadwhichpulsateweaklywith"Toad7".Makehistogramtocontrastbythesedata.Thefirsthistogramwasmadebythedataofthepulsatileamplitudesofwhentoadwasnotgetsstimulateandpulsateweakly,aswellasthepulsatileamplitudeofthefiststimulatedtoad.Aftermagneticstimulation,amplitudesofatriawaveandventriclewavewerehigherthansinglewaveofweakheart.Butitismorelowthantheamplitudesofheartwhenjustexposesobviously.

Fig.5.1.Thehistogramwasmakebytheamplitudesofthetoadexposedheartjustlyandthetoadwhichstimulatedbymagneticfield,thetoadwhichpulsateweakly.The"Toad0"expressedthetoadwhichwasnotstimulatedbymagneticfield.The"Toad1"expressedthefisttoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Makehistogramrespectivelywiththedataofamplitudeofeachtoadstimulatedbymagneticfieldandtheamplitudeofsinglewave.Makehistogramwiththedataofamplitudesofsixtoadsstimulatedbymagneticfield,andcomparethem.

Fig.5.2.Thehistogramwasmadebytheamplitudesofthefirsttoadwhichwasstimulatedbymagneticfieldandthetoadwhichpulsateweakly.The"Toad1"expressedthefisttoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.3.ThehistogramwasmadebytheamplitudesofthesecondtoadwhichwasstimulatedbymagneticfieldandthetoadwhichpulsateweaklyThe"Toad2"expressedthesecondtoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.4.Thehistogramwasmadebytheamplitudesofthethirdtoadwhichwasstimulatedbymagneticfieldandthetoadwhichpulsateweakly.The"Toad3"expressedthethirdtoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.5.Thehistogramwasmadebytheamplitudesofthefourthtoadwhichwasstimulatedbymagneticfieldandthetoadwhichpulsateweakly.The"Toad4"expressedthefourthtoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.6.Thehistogramwasmadebytheamplitudesofthefifthtoadwhichwasstimulatedbymagneticfieldandthetoadwhichpulsateweakly.The"Toad5"expressedthefifthtoadwhichwasstimulatedbymagneticfield.The"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.7.Thehistogramwasmadebytheamplitudesofthewasstimulatedbymagneticfieldandthetoadwhichpuls,"Toad6"expressedthesixthtoadwhichwasstimulatedbyma"Toad7"expressedthetoadwhichpulsatedweakly.

Fig.5.8.Thehistogramwasmadebytheamplitudesofthewasstimulatedbymagneticfield.

Fig.5.9.Thehistogramwasmadebytheamplitudesofthewasstimulatedbymagneticfieldandthetoadwhichpulsateweakly.

Thereisdiscrepancybetweenthepulsatileaeachtoadwhichstimulatedbymagneticfield.Thisisdividualdiscrepancy,itisrelatedwiththestrongoftheexperimentanimals.Butifcomparedthesepulsatileamplitudesoftoadswhichstimulatedbymagneticfieldwithamplitudeofthetoadwhichpulsatedweak