基于文献计量学及Cite Space V分析,对Web of Science和CNKI数据库中根瘤菌固氮的文献数量、出版刊物、研究内容及热点等做深入分析,总结目前该领域研究的重点与薄弱点,以期为致力于作物根瘤菌固氮的科研工作者与决策者提供一定的参考...基于文献计量学及Cite Space V分析,对Web of Science和CNKI数据库中根瘤菌固氮的文献数量、出版刊物、研究内容及热点等做深入分析,总结目前该领域研究的重点与薄弱点,以期为致力于作物根瘤菌固氮的科研工作者与决策者提供一定的参考。分析结果表明,自1980年至今,研究根瘤菌固氮相关论文整体呈波浪式上升趋势,根瘤菌逐渐成为研究热点。目前,国际上美国、法国和英国是该研究领域发文量和被引频次最多的3个国家,而国内发文机构则主要集中在农业发展水平较高、学术力量雄厚的省份,如北京、江苏、黑龙江等,其中,发文量最多的为中国农业科学院,且根瘤菌方面的研究文献主要发表在农业类的专业学术期刊中。Cite Space V分析发现,近40年国内外根瘤菌固氮研究领域的高频关键词主要有大豆、共生固氮、紫花苜蓿等,新兴热点有分子对话、化学模拟、功能基因组等。基于以上分析,今后应加强国内外该领域高水平科研机构间的合作与交流,这将是提高科研成果产出水平的有效途径之一。此外,研究根瘤菌固氮的分子机理,选育高效根瘤菌固氮品种,加强根瘤菌剂的高效应用,优化施肥技术,创建最佳根瘤菌固氮体系,提高根瘤菌固氮效率已成为当前和今后根瘤菌固氮研究的重点和热点,这将为科研人员掌握该领域前沿问题及确定选题方向提供依据。展开更多
The stereocilia of the Organ of Corti in 4 different echolocating bats,Myotis adversus,Murina leuco-gaster,Nyctalus plancyi(Nyctalus velutinus),and Rhinolophus ferrumequinum were observed by using scanning electron mi...The stereocilia of the Organ of Corti in 4 different echolocating bats,Myotis adversus,Murina leuco-gaster,Nyctalus plancyi(Nyctalus velutinus),and Rhinolophus ferrumequinum were observed by using scanning electron microscopy(SEM).Stereocilia lengths were estimated for comparison with those of non-echolocating mammals.The specialized lengths of outer hair cells(OHC)stereocilia in echolocating bats were shorter than those of non-echolocating mammals.The specialized lengths of inner hair cells(IHC)stereocilia were longer than those of outer hair cells stereocilia in the Organ of Corti of echolocating bats.These characteristics of the auditory stereocilia length of echolocating bats represent the fine architecture of the electromotility process,helping to adapt to high frequency sound and echolocation.展开更多
文摘基于文献计量学及Cite Space V分析,对Web of Science和CNKI数据库中根瘤菌固氮的文献数量、出版刊物、研究内容及热点等做深入分析,总结目前该领域研究的重点与薄弱点,以期为致力于作物根瘤菌固氮的科研工作者与决策者提供一定的参考。分析结果表明,自1980年至今,研究根瘤菌固氮相关论文整体呈波浪式上升趋势,根瘤菌逐渐成为研究热点。目前,国际上美国、法国和英国是该研究领域发文量和被引频次最多的3个国家,而国内发文机构则主要集中在农业发展水平较高、学术力量雄厚的省份,如北京、江苏、黑龙江等,其中,发文量最多的为中国农业科学院,且根瘤菌方面的研究文献主要发表在农业类的专业学术期刊中。Cite Space V分析发现,近40年国内外根瘤菌固氮研究领域的高频关键词主要有大豆、共生固氮、紫花苜蓿等,新兴热点有分子对话、化学模拟、功能基因组等。基于以上分析,今后应加强国内外该领域高水平科研机构间的合作与交流,这将是提高科研成果产出水平的有效途径之一。此外,研究根瘤菌固氮的分子机理,选育高效根瘤菌固氮品种,加强根瘤菌剂的高效应用,优化施肥技术,创建最佳根瘤菌固氮体系,提高根瘤菌固氮效率已成为当前和今后根瘤菌固氮研究的重点和热点,这将为科研人员掌握该领域前沿问题及确定选题方向提供依据。
基金Supported by the National Natural Science Foundation of China(Grant No.30430120)and Foundation of President of the Chinese Academy of Sciences
文摘The stereocilia of the Organ of Corti in 4 different echolocating bats,Myotis adversus,Murina leuco-gaster,Nyctalus plancyi(Nyctalus velutinus),and Rhinolophus ferrumequinum were observed by using scanning electron microscopy(SEM).Stereocilia lengths were estimated for comparison with those of non-echolocating mammals.The specialized lengths of outer hair cells(OHC)stereocilia in echolocating bats were shorter than those of non-echolocating mammals.The specialized lengths of inner hair cells(IHC)stereocilia were longer than those of outer hair cells stereocilia in the Organ of Corti of echolocating bats.These characteristics of the auditory stereocilia length of echolocating bats represent the fine architecture of the electromotility process,helping to adapt to high frequency sound and echolocation.
