目的通过对MIRU-VNTR分型技术在新疆乌鲁木齐市耐药结核病基因分型的研究,明确乌鲁木齐市12个标准VNTR分型位点的稳定性,为结核病耐药菌株演变、病源追踪、暴发调查及快速诊断等方面提供理论依据。方法采用间隔重复单元的可变数目串联...目的通过对MIRU-VNTR分型技术在新疆乌鲁木齐市耐药结核病基因分型的研究,明确乌鲁木齐市12个标准VNTR分型位点的稳定性,为结核病耐药菌株演变、病源追踪、暴发调查及快速诊断等方面提供理论依据。方法采用间隔重复单元的可变数目串联重复序列(Mycobacteral interspersed repetive units-Variable number tandem repeat,MIRU-VNTR)分型方法,选择标准12位点VNTR,对65例耐药结核分枝杆菌进行DNA检测,使用MIRU-VNTR数据分析网站进行聚类分析,并进行分辨率指数(HGI)及VNTR等位基因多态性分析。结果 12个VNTR位点等位基因多态性存在差异;除MIRU26位点分辨率较低(h=0.3381)外,其余各位点分辨率均较高(h>0.6);65株菌株可分4大群、3种基因型,成5簇,成簇率为29.231%;结论乌鲁木齐市耐药结核分枝杆菌12个标准VNTR位点等位基因多态性保持较为稳定;采用标准12位点MIRU-VNTR技术对耐药结核病进行基因分型、成簇性分析等分子流行病研究,所得结果可靠。展开更多
Lithium metal stands out as an exceptionally promising anode material,boasting an extraordinarily high theoretical capacity and impressive energy density.Despite these advantageous characters,the issues of dendrite fo...Lithium metal stands out as an exceptionally promising anode material,boasting an extraordinarily high theoretical capacity and impressive energy density.Despite these advantageous characters,the issues of dendrite formation and volume expansion of lithium metal anodes lead to performance decay and safety concerns,significantly impeding their advancement towards widespread commercial viability.Herein,a lithium-rich Li-B-In composite anode with abundant lithophilic sites and outstanding structural stability is reported to address the mentioned challenges.The evenly distributed Li-In alloy in the bulk phase of anodes act as mixed ion/electron conductors and nucleation sites,facilitating accelerated Li ions transport dynamics and suppressing lithium dendrite formation.Additionally,these micron-sized Li-In particles in LiB fibers framework can enhance overall structural integrity and provide sufficient interior space to accommodate the volume changes during cycling.The electrochemical performance of Li-B-In composite anode exhibits long-term cyclability,superior rate performance and high-capacity retention.This work confirms that the synergy between a 3 D skeleton and hetero-metallic lithiophilic sites can achieve stable and durable lithium metal anodes,offering innovative insights for the practical deployment of lithium metal batteries.展开更多
文摘目的通过对MIRU-VNTR分型技术在新疆乌鲁木齐市耐药结核病基因分型的研究,明确乌鲁木齐市12个标准VNTR分型位点的稳定性,为结核病耐药菌株演变、病源追踪、暴发调查及快速诊断等方面提供理论依据。方法采用间隔重复单元的可变数目串联重复序列(Mycobacteral interspersed repetive units-Variable number tandem repeat,MIRU-VNTR)分型方法,选择标准12位点VNTR,对65例耐药结核分枝杆菌进行DNA检测,使用MIRU-VNTR数据分析网站进行聚类分析,并进行分辨率指数(HGI)及VNTR等位基因多态性分析。结果 12个VNTR位点等位基因多态性存在差异;除MIRU26位点分辨率较低(h=0.3381)外,其余各位点分辨率均较高(h>0.6);65株菌株可分4大群、3种基因型,成5簇,成簇率为29.231%;结论乌鲁木齐市耐药结核分枝杆菌12个标准VNTR位点等位基因多态性保持较为稳定;采用标准12位点MIRU-VNTR技术对耐药结核病进行基因分型、成簇性分析等分子流行病研究,所得结果可靠。
基金Project(2023YFC3905904)supported by the National Key Research and Development Program,ChinaProject(2220197000221)supported by the Team of Foshan National Hi-Tech Industrial Development Zone Industrialization Entrepreneurial Teams Program,ChinaProject(2024ZZTS0373)supported by the Central South University Graduate Student Autonomous Exploration Innovative Programme,China。
文摘Lithium metal stands out as an exceptionally promising anode material,boasting an extraordinarily high theoretical capacity and impressive energy density.Despite these advantageous characters,the issues of dendrite formation and volume expansion of lithium metal anodes lead to performance decay and safety concerns,significantly impeding their advancement towards widespread commercial viability.Herein,a lithium-rich Li-B-In composite anode with abundant lithophilic sites and outstanding structural stability is reported to address the mentioned challenges.The evenly distributed Li-In alloy in the bulk phase of anodes act as mixed ion/electron conductors and nucleation sites,facilitating accelerated Li ions transport dynamics and suppressing lithium dendrite formation.Additionally,these micron-sized Li-In particles in LiB fibers framework can enhance overall structural integrity and provide sufficient interior space to accommodate the volume changes during cycling.The electrochemical performance of Li-B-In composite anode exhibits long-term cyclability,superior rate performance and high-capacity retention.This work confirms that the synergy between a 3 D skeleton and hetero-metallic lithiophilic sites can achieve stable and durable lithium metal anodes,offering innovative insights for the practical deployment of lithium metal batteries.
