简介:ThisisthespecialissuedevotedtobioinformaticsresearchinSingapore.BioinformaticsresearchinSingaporestartedlargelyin1996whentheBioinformaticsCenter,NationalUniversityofSingapore,wasformed.Withthegovernment'seffortstoturnSingaporeintoapowerhouseofbiomedicalresearch,theGenomeInstituteofSingaporeandtheBioinformaticsInstituteofSingaporehavebeenestablishedsince2000.Recently,abioinformaticsresearchcenterwasalsoformedintheNanyangTechnologicalUniversity.Currently,therearealargenumberofbioinformaticsresearchteamsineachoftheseinstitutions.
简介:Themodulationandcontrolofgecko'sfootmovementswerestudiedelectrophysiologicallyinordertodesignthemotorcontrolsystemofagecko-mimicrobot.Inthisstudy(1)theanatomyoftheperipheralnervescontrollingthegecko'sfootmovementswasdetermined;(2)therelationshipbetweenthelimbnervesofthegeckoanditsfootmotorpatternswasstudied;(3)theafferentimpulsesofthenervesevokedbyrubbingthegecko'stoesandpalmwererecorded;(4)copyingthenaturalpatternsofmovementofthegecko'sfoot(abduction,adduction,flexion,andrevolution)anditslimbnervemodulationandcontrolmechanism,thenerveswerestimulatedundercomputercontrol,andtheresultsrecordedbyCCD.Resultssuggestthatgecko'sfootmovementscanbesuccessfullycontrolledbyartificialelectricalsignals.
简介:China'sFreeARTProgramwasinitiatedin2002asanemergencyresponsetosaveandimprovethelivesofAIDSpatientslivingmainlyinimpoverishedruralregionsofcentralChina.WithlittleexperienceinHIV/AIDStreatmentandcareandresourcelimitations,China'seffortstoprovidewidespreadaccesstofreeantiretroviraltherapyhasbeenaprocessfraughtwithdifficulty.However,theFreeARTProgramisprogressingfromanemergencyresponsetoastandardizedtreatmentandcaresystem.Thedevelopmentofnationalguidelines,trainingprograms,alaboratorysupportnetwork,anationalpatientdatabase,programsforspecialpopulationssuchaschildrenandpatientslivingwithcoinfections,andoperationalresearchhasimprovedthescopeandqualityofthefreetreatmentprogram.AsofJune30,2005,atotalof19,456patientsin28provinces,autonomousregions,andspecialmunicipalitieshadreceivedfreeART.ChallengesstemmingfromthenatureofChina'shealthsystemandpatientpopulationpersist,butwithstronggovernmentsupportandadiversesetofresources,Chinahasthecapacitytoovercomethesechallengesandtoprovidenationwideaccesstohighqualitytreatmentandcare.
简介:Thecorona-likespikesorpeplomersonthesurfaceofthevirionunderelectronicmicroscopearethemoststrikingfeaturesofcoronaviruses.TheS(spike)proteinisthelargeststructuralprotein,with1,255aminoacids,intheviralgenome.Itsstructurecanbedividedintothreeregions:alongN-terminalregionintheexte-rior,acharacteristictransmembrane(TM)region,andashortC-terminusintheinteriorofavirion.WedetectedfifteensubstitutionsofnucleotidesbycomparisonswiththeseventeenpublishedSARS-CoVgenomesequences,eight(53.3%)ofwhicharenon-synonymousmutationsleadingtoaminoacidalternationswithpredictedphysiochemicalchanges.ThepossibleantigenicdeterminantsoftheSproteinarepredicted,andtheresultisconfirmedbyELISA(enzyme-linkedimmunosorbentassay)withsynthesizedpeptides.AnotherprofoundfindingisthatthreedisulfidebondsaredefinedattheC-terminuswiththeN-terminusoftheE(envelope)pro-tein,basedonthetypicalsequenceandpositions,thusestablishingthestructuralconnectionwiththesetwoimportantstructuralproteins,ifconfirmed.Phyloge-neticanalysisrevealsseveralconservedregionsthatmightbepotentdrugtargets.
简介:Polyamines在在植物,而是他们的准确角色调整各种各样的发展过程被含有并且他们怎么管理这些过程尚待逃犯。我们这里报导浓密的Arabidopsis和矮子异种,bud2,哪个从编码S-adenosylmethioninedecarboxylases(SAMDC)的小基因家庭的一个成员的完全的删除的结果为在polyamine简历的不可缺少的中介的形成必要合成小径。bud2植物在开花期,根,和叶柄扩大了脉管的系统,并且polyamines的改变的动态平衡。bud2和samdc1的双异种,另一个SAMDC成员的击倒的异种,是胚胎致命,证明SAMDC为植物胚胎开始是必要的。我们的结果建议polyamines为更高的植物的正常生长和发展被要求。
简介:土壤宏无脊椎动物在在澳大利亚的热带无树平原支撑生产和生物多样性起一个重要作用。例如,通过他们的foraging和嵌套的活动,白蚁再循环营养素和碳并且生产便于水渗入的土壤毛孔。挑战向前到份量上理解驾驶这的关系和进程。不同种类和宏无脊椎动物的功能的组在各种各样的风景过程起什么作用?是不同陆地管理的效果的,练习(例如,国内牛放牧,火)在为风景健康的这些关系,和后果上?这篇论文在北澳大利亚从研究论述初步的结果,检验在土壤宏无脊椎动物上放牧的陆地状况和国内牛的效果,并且为要用作一个工具恢复的白蚁的潜力在降级的区域玷污功能。在北澳大利亚,增加了降级似乎在差异和活动ofmacroinvertebrates与衰落被联系。白蚁看起来是最有弹性的组之一,与能够维持在降级的风景的活动的某种类。
简介:目的对北京市肿瘤研究所及本实验动物学部保存的$180进行了克隆培养,根据克隆细胞的腹水生长特性,从中选出8株克隆,对不同克隆$180细胞的特性进行研究。方法免疫组化法测不同克隆细胞的蛋白质分布,流式细胞仪测定不同克隆细胞的DNA含量,扫描电镜观察克隆细胞表面结构,SDS-聚丙烯酰胺凝胶电泳测克隆细胞的电泳图谱。结果其中3株克隆从uJ见腹水之日起,腹水即为血性;1株微显血性;4株在接种腹腔7日内腹水无血性。扫描电镜观察6株克隆细胞表面结构,各具特点,有所不同。流式细胞仪测定6株不同S180克隆细胞DNA含量,分别为8.5,9.3,7.9,8.5,8.6,8.3pg。免疫组化染色显示不同克隆与11种抗体反应有所不同,一旦与某抗体反应阳性,则阳性细胞比率均在97%以上。SDS-聚丙烯酰胺凝胶电泳测定克隆细胞s1H10及S2D9的电泳图谱,S1HIO克隆细胞有33条带,S2D9克隆细胞有30条带。结论8株克隆细胞各具特点。
简介:对四个单位保种的S180细胞经KM小鼠腹腔传代,体外培养加秋水仙碱,涂片、染色后,显微镜下计数染色体数目:腹水传代的S180细胞.用70%乙醇固定,流式细胞仪测DNA含量。结果如下:本学部(本部),中国医学科学院药物所(药物所),武汉大学保种中心(武汉大学)和北京市肿瘤所(肿瘤所)保种的S180细胞株,其染色体均数分别为628±22.8,69.1±21.2,39.9±8.26,58.7±9.75条。四单位S180细胞株染色体数做方差分析表明,除肿瘤所与本部外,其它两单位比较均有显著统计学差异(P<0.01)。直方图分析显示主流染色体范围分别为56~60,61~65,41~45,61~65条。流式细胞术DNA含量分析表明肿瘤所S180DNA含量最多,武汉大学保种的S180细胞的DNA含量最少。这些结果均证明四个单位的S180细胞株在一些方面已出现显著差异。