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1.
用神经组化和免疫组化方法,系统地观察了32例新儿气管、支气管的神经分布,并探讨其特点。实验显示:气管、支气管受胆碱能(Cholinergic)肾上腺素能(Adrenergic)和血管活性肠肽能(VIP-ergic)神经支配。前两种神经分布气管直至终末细支气管;VIP-ergic神经见于气管、支气管平滑肌和腺体、且比Adrenergic神经纤维丰富。Cholinergic、Adrenergic、VIP-ergic神经末梢均支配到气管、支气管的血管壁外膜或外、中膜交界处,在所有材料,Cholinergic神经节得到证实,但未见Adrenergic、VIP-ergic神经节。  相似文献   

2.
应用免疫组化SP法对32 例早期胃癌及癌旁粘膜和24 例慢性萎缩性胃炎中bcl 2 的表达同时进行检测,结果癌旁和慢性萎缩性胃炎中不典型增生、单纯增生、腺体扩张和癌旁肠化均显示bcl 2 高表达,与癌无显著差异( P> 005),应视作癌前病变。bcl 2 在癌前病变和早期胃癌中的表达显著高于周围正常粘膜( P<001),提示bcl 2 高表达是胃癌发生的早期事件,在胃癌发生上起着重要作用,可作为胃癌早期诊断的可靠指标  相似文献   

3.
Mechanicalstressisamajorcauseofcardiachypertrophy .Althoughthemechanismsbywhichmechanicalloadinducecardiaccellularhypertrophyhavelongbeenasubjectofgreatinterestforcardiologists,thesignaltransductionpathwaysgoverningthehypertrophicresponseofcardiomyocy…  相似文献   

4.
IntroductionAlmosteverylinearofnonliearcontrolstrategycentersaroundaprocessmodel,withreallifeprocessesbeingusuallynonlinear.Theaccuracyofthemodelcoulddirectlyinfluencetheperfor-manceofthefinalcontroller.Linearmodelsal-waysleadtoarelativesimplicityint…  相似文献   

5.
Thecancerofgallbladderisacommonmalignanttumorofthebiliarytract ,whichishardtodiagnoseandhasapoorprognosis .Itisalwaysaccompaniedbycholecystolithiasis .The pathologicalresearchforcholecystolithiasis ,adiseasecommonlyandfrequentlywerefoundinclinics ,showedt…  相似文献   

6.
Nomenclaturecp—Specificheatatconstantpressurecε1,cε2—k-εmodelconstantsg—Gravitationalaccelerationgi—Gravitationalacceleration...  相似文献   

7.
Itiscommonthatthegeneticfactorsorgenetic environmentalinteractionsmaycontributetotheoccurrenceofhypertensioninthatethnicdifference[1,2 ] .Traditionally ,elevatedbloodpressure(BP )isthediagnosticcriterionofessentialhypertension ,whichwasdefinedarbitrarily .Stu…  相似文献   

8.
@周志杰@胡光锐@李群IntroductionSpeechproductionisaccomplishedbyvariousacousticalexcitationsofthehumanvocaltract.Voicedspeechisgeneratedb...  相似文献   

9.
Despitethemajormedicalandsocietalcostsrelatedtolowbackpain ,thecausesofsuchpaininmanycasesremainlargelyobscure .Mooney[1]reviewedmuchofthecurrentknowledgeonlowbackpain ,concludingthatthediscmaybethe primarysourceofpain ,butthemechanismsofpainproductionareu…  相似文献   

10.
IntroductionInvariousspeechprocesingapplications,itisverycommontofindthedegradationofthespeechqualitycausedbyacousticbackgrou...  相似文献   

11.
平面机构运动分析和力分析的交互式软件设计   总被引:1,自引:0,他引:1  
介绍了平面机构运动分析和力分析交互式软件的设计思想、设计功能与设计方法。该软件是以Visual Basic5.0为设计语言,将参数化设计与交互式设计相结合,具有方便用户的良好界面,从而使机构的分析更加方便、快捷、直观和形象。  相似文献   

12.
Glutamateexcitotoxicityplaysakeyroleintheinductionofneuronalcelldeathoccurringinmanyneuropathies.Bax ,apro apoptoticgeneoftheBcl 2family ,hasbeenshowntobeinvolvedindevelopmentalneuronaldeath .Neuronaldeathfollowingexcitotoxicdamagehasbeenthoughttoreflectn…  相似文献   

13.
Hepatocellularcarcinoma(HCC)isoneofthemostcommonmalignanttumorsinChina ,andgreatattentionhasbeenpaidtoitscarcinogenesisresearch .Inrecentyears ,ithasbeenfoundthatheatshockprotein(HSP) playsagreatroleintheoccurrenceanddevelopmentofcarcinoma .Thepurposeofthi…  相似文献   

14.
Endothelialcells (ECs)functionasthebarrierofthebrainandrelatetothesecretionofsomeendo crines.Theirdysfunctioniscloselyrelatedtotheoccurrenceanddevelopmentofcerebralvasculardiseases[1] .DamagetoECsisthefirstsignandaba sicfactorofcerebralischemia .Therefore ,…  相似文献   

15.
PacedelectrocardiogramisanewbranchofECG,whichisanefectivetoolinevaluatingthepacemakersbehavior.Advancementsintechnologyhavema...  相似文献   

16.
Thedetectionrateofresectablesmallpancreaticcar cinomaisincreasingasaresultofrecentadvancesinvari ousdiagnosticimagingtechniques,however ,resectionatthetimeofdiagnosisispossibleinonly 5 %- 2 2 %ofthepatients[1] ,andmostofthepatientsbelongtoadvancedpancreaticcar…  相似文献   

17.
Deregulationofcellcyclecontrolisnowconsideredakeyeventinoncogenesisandalterationsofgenesinvolvedinthiscontrolarefrequentfindingsindifferentcancermodels.CyclinD1hasdrawnattentionasa potentialoncogeneinseveralcancertypes .CyclinD1participatesinthecontrolo…  相似文献   

18.
IntroductionInprocesscontrol,morethan95%ofthecontrolloopsareofPIDtype[1].Themainreasonisitsrelativelysimplestructure,whichcanbeeasilyunderstoodandimplementedinpractice,andthatmanysophisticatedcontrolstrategies,suchasmodelpredictivecontrol,arebasedoni…  相似文献   

19.
Insulatingspacerssupportingthehighvoltageconductorincompressedgasinsulatedsystemsplayanimportantroleindeterminingtheoverallsizeofgasinsulatedswitchgear (GIS) .Duetoveryhighsurfaceresitivity ,electro staticchargesmaybeaccu mulatedandheldatdielectricinterf…  相似文献   

20.
IntroductionMCFCisanewgenerationoffuelcellthatisef-ficientandclean.Theinternaltemperaturedis-tributionoftheMCFCstackwillinfluencethecellvoltageandcurrentdensity.Therefore,asthetemperatureincreases,thecellperformanceisenhanced,atthesametime,thereisinc…  相似文献   

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