简介:摘要:本文介绍了GJB 5000B与GJB 5000A对比的主要差异点,为企业完成GJB 5000B成熟度模型的体系建立和本地化工作提供思路。
简介:TheGJB2gene(connexin26)hasbeenshowntoberesponsibleforDFNB1andDFNA3.WescreenedtheGJB2genein488patientswithprelingualdeafness(Group1),124withpostlingualdeafness(Group2),and117normalhearingsubjects(Group3).Wefoundthat,inGroup1,65patients(13.32%)werehomozygotesorcompoundheterozygotesand51patients(10.45%)carriedasinglepathogenicmutation.The235delCmutationwasthemostfrequentmutation,accountingfor73.22%oftheknownpathogenicallelesinGroup1.NohomozygotesorcompoundheterozygotesweredetectedinGroup2orGroup3.Somepostlingualdeafpatients(2.42%)andnormalhearingsubjects(4.27%)were235delCcarriers.Ourpreliminarydataindicatethat235delC,themostfrequentmutationidentifiedinthisstudy,isamajorcauseforprelingualdeafness.
简介:摘要:本文介绍了GJB5000A项目利益相关方的管理,主要内容包括:利益相关方的定义、管理,并简单介绍成功的识别和管理好利益相关方对项目实施的益处。
简介:GJB151A/152A-97标准是军用电子、电气产品开展电磁兼容性测试的指导性文件,是开展相关电磁兼容性检测的基础。重点对依据GJB151A/152A-97标准进行电磁兼容性测试的共性问题和单项测试中的特殊问题进行了探讨,并结合实际的检测工作介绍了一些经验,也提出了一些问题,希望通过交流进一步提高测试能力。
简介:目的构建人野生型Cx30与红色荧光蛋白DsRed的融合蛋白表达载体,为揭示Cx30突变患者发病机制提供实验依据。方法用PCR法扩增GJB6基因,将PCR产物与T载体连接,用双切酶酶切pEASY-GJB6与载体DsRed-N1,连接回收后的片断,构建野生型Cx30编码序列与PDsRed2表达载体,测序鉴定序列正确性。将GJB6-DsRed用脂质体转染HEK293细胞,荧光显微镜观察表达的融合蛋白。结果GJB6-DsRed在HEK293细胞中高效表达,表达主要位于细胞膜中。结论成功构建了人野生型Cx30与红色荧光蛋白DsRed的融合蛋白表达载体,为进一步研究非综合征性聋的致聋机制奠定了基础。
简介:MutationsinGJB2genearethemostfrequentlyfoundmutationsinpatientswithnonsyndromichearingimpairment.However,thespectrumandprevalenceofmutationsinthisgenevaryamongdifferentethnicgroups.InChina,30,000infantsarebornwithcongenitalhearingimpairmentannually.Inordertoprovideappropriategenetictestingandcounselingtothefamilies,weinvestigatedthemolecularetiologyofnonsyndromicdeafnessin103unrelatedschoolchildrenattendingNantongSchoolfortheDeafandMuteinJiangsuProvince,China.ThecodingexonoftheGJB2genewasPCRamplifiedandsequenced.SixtytwoGJB2mutantalleleswereidentifiedin35.9%(37/103)ofthepatients.Twentyfivepatientscarriedtwopathogenicmutationsand12patientscarriedonemutantallele.The235delCwasthemostcommonmutationaccountingfor69.4%(43/62)ofGJB2mutantalleles.TheGJB2mutantallelesaccountedfor30.1%(62/206)ofallchromosomesresponsiblefornonsyndromichearingimpairment.Testingofthe3mostprevalentdeleteriousframeshiftmutationsinthiscohortdetected100%ofallGJB2mutantalleles.TheseresultsdemonstratethataneffectivegenetictestingofGJB2geneforpatientsandfamilieswithnonsyndromichearingimpairmentispossible.
简介:ObjectiveToinvestigateGJB2mutationprevalencesintheUigurandHanethnicgroupsinXinjiang,China,anddeterminetherelationshipbetweenethnicityandGJB2genemutations.MethodsInformationregardingethnicityofpatients'familieswasobtainedthroughmedicalrecordsreviewand/orpatientinterview.Bloodsampleswerecollectedfrom61Uigursand66Hansfordirectsequencingofthecodingregionandintron/exonboundariesoftheGBJ2gene.ResultsCarrierfrequencyofGJB2mutationswassimilarbetweentheUigurandHansubjects.TheGJB235delGmutationwasseenonlyinUigurpatientswithhearingloss,whereasthe235delCmutationwasidentifiedinbothUigurandHanpatients.TheallelicFrequencyof35delGmutationwas7.4%(9/122)inUigurdeafstudents,butnoneinHandeafstudents(0/128)andUigurcontrols(0/196).TheallelicfrequencyofGJB2235delCmutationinUigurandHandeafstudentswas5.7%and9.8%,andthatof299-300delATmutationwas0.8%and5.5%,respectively.V27IandE114Gwerethemostfrequenttypesofpolymorphism.ConclusionWefoundanAsian-specificGJB2diversityamongUigurs,andcomparableGJB2contributiontodeafnessinUigurandHanpatients.Thehighcarrierfrequencyof35delGinUigurs(11.5%)isprobablydefinedbygenedrift/foundereffectinaparticulargroup.EventhoughGJB2mutationshavebeenwidelyreportedintheliterature,thisdiscussionrepresentsthefirstreportofGJB2mutationsinChinesemulti-ethnicpopulations.
简介: 摘要:通过对企业组织过程进行深入研究,制定了以下具有可操作性的改进方案。首先,明确改进目标在提高软件研制生产率和软件研制质量方面的作用,并对目标进行细化。其次,建立和完善了组织过程改进库,包括研发流程、项目管理流程、质量管理流程等,确保改进工作有据可依。接着,将改进方案部署到实际应用中,通过ASIDE平台等技术手段实现快速集成和高效协作,并采取了有效措施保证部署工作的顺利推进。同时,通过建立和完善过程监控和评估机制,及时发现问题并作出调整,确保组织过程改进活动取得实效。这些改进方案的成功实施,不仅提高了企业软件研制生产率,还显著提升了软件研制质量。
简介:摘要目的研究并探讨儿童遗传性耳聋基因GJB2、SLC26A4,GJB3、12srRNA基因直接测序异常结果。方法分析48例GJB2、SLC26A4,GJB3、12srRNA直接测序法的异常结果。结果GJB2基因发现4个突变位点,包括79G>A、341A>G、109G>A和235delC,12sRNA发现三个突变位点,即1382A>C、1438A>G、1555A>G,SLC26A4和GJB3基因均未见突变;突变频率最高的突变位点是GJB279G>A和12sRNA1438A>G,其次是GJB2341A>G。结论GJB2和12sRNA基因可能是黑龙江省最常见的致聋基因,两个基因的热点突变与国内其它地方报道的有差异。
简介:摘要本文对GJB9001C-2017与GJB9001B-2009之间变化进行了深入分析,希望可以对GJB9001C-2017《质量管理体系要求》的学习起到一定的参考和帮助,准确把握GJB9001C-2017与GJB9001B-2009之间的区别,提高GJB9001C-2017《质量管理体系要求》实际应用有效性。
简介:MutationsintheGJB2genearethemostfrequentlyfoundmutationsinpatientswithnonsyndromichearingimpairment.However,themutationspectrumandprevalenceofmutationsvaryamongdifferentethnicgroups.Everyyear,30,000babiesarebornwithcongenitalhearingimpairmentinChina.Inordertoprovideappropriategenetictestingandcounselingtothefamily,weinvestigatedthemolecularetiologyofnonsyndromicdeafnessin135unrelatedschoolchildrenattendingChifengMunicipalSpecialEducationSchoolinInnerMongolia,China.ThecodingexonoftheGJB2genewasPCRamplifiedandsequenced.Inaddition,the12SrRNAgeneandtRNAser(UCN)ofmitochondrialgenomewerescreenedformutationsresponsibleforhearingimpairment.SixtyfourGJB2mutantalleles,including60confirmedpathogenicallelesand4unclassifiedvariants,wereidentifiedin31.1%(42/135)ofthesubjects.Twentytwosubjectscarriedtwopathogenicmutationsand20subjectscarriedonemutantallele,includingonesubjectwithoneautosomaldominantmutation.The235delCwasthemostcommonmutationaccountingfor65.6%(42/64)GJB2mutantalleles.WhencomparedtootherAsianpopulations,oursubjectcohorthadhigherfrequencyof235delCmutationthantheJapanesepopulation.TheGJB2mutantallelesaccountfor23.7%(64/270)ofallchromosomesresponsiblefornonsyndromichearingimpairment.Testingofthe4mostprevalentdeleteriousframeshiftmutations(235delC,299_300delAT,176_191del16,and560_605ins46)inthiscohortdetected90%ofallGJB2mutantalleles.TheseresultsdemonstratethateffectivegenetictestingoftheGJB2geneforpatientsandfamilieswithnonsyndromichearingimpairmentispossibleintheChinesepopulation.Sincethemostcommon309kbGJB6deletionisnotdetectedandonlyone1555A>GmutationinmitochondrialDNAisdetectedinourpatients,investigationofmutationsinothernucleargenesand/orenvironmentalfactorsresponsiblefornonsyndromichearingimpairmentintheChinesepopulationis
简介:目的构建6种分别携带GJB2基因错义突变A40G、V37I、L90P、L90V、V84L和W44C的真核表达载体,转染HEK293细胞,建立6种错义突变的稳定表达细胞系。方法以野生型Cx26-EGFP融合蛋白质粒为模板,用Stratagene公司定点突变试剂盒构建错义突变表达载体,直接测序鉴定序列正确性,选取含有突变的载体转染HEK293细胞,G418选择性培养2周,流式细胞仪筛选表达阳性细胞,扩增培养形成稳定表达人Cx26突变的HEK293细胞系。培养细胞用4%多聚甲醛固定,鬼笔环肽和4',6-二脒基-2-苯基吲哚衬染细胞核,荧光显微镜下检测结果。结果6种突变表达载体经过测序,均含有相应突变,无多余突变出现,转染后均可在细胞间形成缝隙连接,呈现绿色荧光。结论成功构建6种携带GJB2基因错义突变的真核表达载体,为进一步研究错义突变致聋原因奠定了实验基础。
简介:摘要:随着软件在各行各业的广泛应用,软件质量管理变得至关重要。本文以GJB5000B软件质量管理评估与改进为主题,介绍了评估和改进的重要性,并提供了相应的方法和策略。同时,还探讨了实施评估与改进所面临的挑战,并给出了解决方案和建议。通过持续的改进和提升,组织和个人可以不断提高软件质量,为用户提供更好的体验和价值。软件质量管理评估与改进的实践是一个持久的过程,需要团队的合作和积极的参与。