生物医学工程中英文对照外文翻译文献文档格式.docx

1、t change.I. INTRODUTIONAll life forms have magnetism. All kinds of magnetic field would have some effects on the configurationand activitiesof life forms that whicheverenvironmentalmagnetic,additional magnetic or inside magnetic of organism. The biologic effects are related to the characteristics an

2、d12附录英文文献及翻译the intension of the magnetic field, as well as the species and the tissues of the life forms.The experimentation showed that magnetism stimulation in some range would control the growth of rat tumour, whatever they are in or out the. bMoudcyh more they can induce the cancer cells dead.3

3、0mTmagneticstimulationwould increasethe contentof NO in the liver and the kidney.Magnetic also can improve the activity of some enzyme and promote the regeneration of nerve tissue.Cellwould increase, the bones would be concrescence,the scar would be rehabilitate.Theblood rheologyand blood cell numbe

4、r both of human and rat would change obviously, DI the blood mucosity would be low.Heart is the most importantapparatusof life. It pulsatesday and night. Heart once stoppulsating, the life for danger.Numerous scholar pays attention to the role of magnetic field.But they just studied the effects of m

5、agnetic stimulation of the heart pacemaker. The experiments about direct effects of stimulate heart by magnetic is very few.The toads are our experiment animalse.Wstimulated and noted by the magnetic stimulation equipment and the noted equipment of pulsatile curve made by ourselves. Analyze the resu

6、lts.II. STUFFA.Experimentequipments: magneticstimulationequipment;（magneticintension8-10T, impulse width 150ms,maximal stimulation frequency5Hsozf）t;ware of noted pulsatile curve （made by ourselves）;cardiomuscular transducer;Ringer.Sol; Batrachia instruments; clip of frog heart;cotton thread; burett

7、e.B.Experiment animals: toads.III. METHODA. Destroythe brain and the spinalcord of the toad by stylet:Penetrateinto the occipitalaperture upright with stylet,destroyed the brain upwards, take back the stylet and destroy the spinal downwards. If the limb of toad were relaxed, it showed that the brain

8、 and spinal were destroyed completel.yB. Expose the toad heart: Make the toad lying on its back on the winding center. The magnetic aspect is upright through the toad heart.Cut the ventral skin of toad, snip the breastbone,expose the rat heart. Nip the heart tip by clip care. fMulalyke the cotton th

9、read tied with the clip of frog hear the linked with the cardiomuscular transducer. Do not make the toad heart leave thorax, or it would disturb the experiment results.C. Noted the result:Connect the cardiomuscular transducer with the computer. Take notes the curve of toad heart without giving the s

10、timulate of magnetic fieldD. After three minutes, noted the weak pulsatile curve.E . Make the magnetic intension 1,0eTlectricize 10s.Stimulate the toad heart and record the pulsatile curve.IV. RESULTSThe abscissa of cardiac rhythmic pulsatile curve is time, the ordinate is constriction power.Take no

11、tes for the pulsatilecurve of toad heart that exposedjust.We can know the rhythmicpulsatile cycle of the toad heart is 1.5s from fig 1 which show the cardiac rhythmic pulsatile curve of the toad which was exposed the heart just now. There are two waves in each cycle, one is atria wave, the other is

12、ventriclewave. The atria wave is 0.5s and the ventriclewave is 1.0s. The constriction power of atria is less than that of ventricle. The amplitude of constriction power of ventricle is the 2 times of the atria.Fig. 4.1. It is rhythmic pulsatile curve of the toad without magnetic stimulation.The cons

13、triction power of toad heart would become weaker after the toad heart was exposed for a while. At the same time,atrium wave and ventricle wave can not be already distinguished. Heart contracting amplitude were reduced obvi,oduoslnyot go to the half of original atrium wave.The rhythmic pulsatile cycl

14、e of the toad heart is still 1.5s.Fig. 4.2. It is the weak pulsatile curve of toad without magnetic stimulation.But we can distinguish the atria wave and the ventricle wave again after giving the toad heart a magnetic stimulation on following picture. And the amplitude of ventricle waves is more than that of the single wave. The rhythmic pulsatile cycle of the toad heart is still 1.5s.There were six toads as