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Dem.nstration of safety characteristics and effects on gut m.crobiota of Lactobacillus gasseri Hm.18

Food Science and Hum.n w.llness 2024年第2期13卷 611-620页

作者： Xianxian Jia m.aom.ao Jia Xiang Gao Xiang Li m.ngyuan w.ng Shengqiang Du rui Huang Xiaotong Li Jun Zhang Shujin Li Chunling m. Yan Zhang Bin Cong Departm.nt of Pathogen Biology Institute of basic MedicineHebei Medical UniversityShijiazhuang 050017China Research Unit of Digestive Tract m.croecosystem.Pharm.cology and Toxicology Chinese Academy of Medical SciencesShijiazhuang 050017China Institute of Basic m.dicine Hebei Medical UniversityShijiazhuang 050017China College of Forensic m.dicine Hebei Key Laboratory of Forensic MedicineCollaborative Innovation Center of Forensic Medical Molecular IdentificationHebei Medical UniversityShijiazhuang 050017China Hebei Food Safety Key Laboratory Hebei Food Inspection and Research InstituteShijiazhuang 050227China

Hum.n norm.l flora is a source of *** safety characteristics of a specific isolate determ.ne its application in foods or *** food-borne-pathogen antagonist strain Lactobacillus gasseri Hm.18 is one of the isolates from.norm.l hum.n *** this w.rk,w. assessed the in vitro pH tolerance,bile tolerance,biogenic am.ne production,m.cin utilization,and safety of in vivo adm.nistration to m.ce to evaluate general health,organ-body w.ight index,organ histopathological change,w.ether *** Hm.18 can colonize in the gut or m.dulate the gut m.crobiota after oral *** results suggest that *** Hm.18 can tolerate pH 3 for 2 h,3%bile for 3 h,biogenic am.ne negative,m.cin usage negative,does not encode verified toxins,and cause no visible change in m.ce's *** Hm.18 m.ght not colonize in m.ce's gut,but can significantly affect the structure of gut m.crobiota.A bibliographical survey suggested that there w.re as few.as 8 opportunistic infection cases from.1984 to 2022 and that the possibility for *** to cause infection is relatively ***,this w.rk provides a basis for the foods or drugs application of *** Hm.18 and gives a m.p of experim.nts for the safety assessm.nt of probiotics.

关键词： Probiotics Lactobacillus gasseri Safety assessm.nt Gut m.crobiota

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Chiral helically grooved gold nanoarrow. for concurrently enhancing oxygen and hydrogen evolution from.electrochem.cal w.ter splitting

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Science China Chem.stry 2024年

作者： Lufei Huang Tao w.ng Ying Li Ping w.ng rui Tian Baow.n Zhou Lin Yao China-UK Low.Carbon College Shanghai Jiao Tong University Electron m.croscopy Laboratory School of Physics Peking University State Key Laboratory for m.soscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Key Laboratory for Pow.r m.chinery and Engineering of m.nistry of Education Research Center for Renewable Synthetic FuelSchool of Mechanical Engineering Shanghai Jiao Tong University

Electrocatalytic w.ter splitting show. a trem.ndous prom.se for storing green and interm.ttent electricity into storable fuels,paving a sustainable w.y tow.rd carbon neutrality. The exploration of a bifunctional electrocatalyst for sim.ltaneously enhancing oxygen evolution reaction and hydrogen evolution reaction is at the core yet rem.ins a grand challenge, especially operated in the sam. electrolyte. In this w.rk, m.soscale gold nanoarrow. w.th special chiral m.rphology are synthesized for electrocatalytic w.ter splitting. In the sam. electrolyte of 1 m.KOH aqueous solution, the as-designed chiral R-/L-helically grooved gold nanoarrow.（R-/L-heliGNAs） dem.nstrated significantly enhanced perform.nce in both hydrogen evolution reaction and oxygen evolution reaction w.th overpotentials of 186 and 355 m. at 10 m. cm.2, respectively, com.ared to the achiral counterpart. For oxygen evolution reaction, the perform.nce is even com.arable to com.ercial notable m.tal catalysts,i.e., RuO2, of w.ich the overpotential is 310 m. under the sam. m.asured conditions. The spin-polarized conductive atom.c force m.croscope（c-AFm., finite-difference tim.-dom.in sim.lation, in com.ination w.th electrochem.cal investigations, show.that the chirality of R-/L-heliGNAs m.kes a substantial contribution tow.rd the rem.rkable perform.nce by enhanced electric field distribution for hydrogen evolution reaction and by tuning the spin states of the electrons for oxygen evolution *** study presents an encouraging strategy for sim.ltaneously prom.ting hydrogen evolution reaction and oxygen evolution reaction that operated in the sam. electrolyte by im.arting chirality tow.rd a m.soscale inorganic electrocatalyst, show.ng a grand prom.se for opening up a new.w.y for electrocatalytic w.ter splitting tow.rd green hydrogen.

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Deep structure of the Kum.ol basin in the northern Tibetan Plateau and its resource environm.ntal im.lications

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Science China Earth Sciences 2024年

作者： w.nhui LI Zhanw. LU rui GAO Xiaofan DENG Jingyuan LI Guangw.n w.NG Zhanxuan SUN Sinoprobe Laboratory of m.nistry of Natural Resources Institute of Geology Chinese Academy of Geological Sciences School of Earth Sciences and Engineering Sun Yat-sen University South Branch of Sinopec Petroleum.Engineering Geophysics Co. Ltd

The Kum.ol basin is located in the northern Tibetan Plateau and is a closed plateau basin w.th an average altitude of>4000 m.and an area of nearly 20000 km.. Its boundaries are lim.ted by the Altyn Tagh fault, East Kunlun orogen and Qim.ntag orogen. Studying the deep structure of the Kum.ol basin reveals 2 significant im.lications:（1） the basin has developed a large thickness of>7000 m.Cenozoic continental sedim.nts, recording the uplift history of the northern Tibetan Plateau, and （2）prelim.nary w.rk indicates that the basin is likely to have oil and gas prospects. How.ver, ow.ng to the adverse natural conditions of the area and the strong tectonic activity in the Cenozoic, the latter of w.ich w.s not conducive to hydrocarbon preservation,only regional geological m.pping and petroleum.exploration route surveys have been carried out, and there is no consensus on strata, structure and tectonic evolution. From.2021 to 2022, a deep seism.c reflection profile im.lem.nted by the Second Tibetan Plateau Scientific Expedition and Research （STEP） project w.s the first high-resolution geophysical survey across the Kum.ol basin. This study uses seism.c reflection m.gration profiles, first-arrival w.ve tom.graphic im.ging and previous research results to analyze the deep structure of the basin. The final m.rged m.del contains m.ny features of tectonic and resource significance:（1） The Kum.ol basin is～90 km.w.de from.north to south, w.th a basem.nt depth of>9000 m. The m.in com.onent is the Cenozoic continental deposits, w.ich are divided into tw. m.jor parts:the southern com.osite basin and the northern faulted basin. Ow.ng to the later com.ression, the southern com.osite basin experienced significant deform.tion, but m.st parts still preserved their original sedim.ntary form.tions.（2） The structural deform.tion characteristics of the basin reveal a tw.-stage tectonic evolution process of the northern Tibetan Plateau in the Cenozoic:from.the Oligocene to the Pliocene, the m.in

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Enhancing the Perform.nce of Perovskite Light-Em.tting Diodes via Synergistic Effect of Defect Passivation and Dielectric Screening

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Nano-m.cro Letters 2024年第10期16卷 244-256页

作者： Xuanchi Yu Jia Guo Yulin m.o Chengw.i Shan Fengshou Tian Bingheng m.ng Zhaojin w.ng Tianqi Zhang Aung Ko Ko Kyaw.Shum.ng Chen Xiaow.i Sun Kai w.ng rui Chen Guichuan Xing Institute of Applied Physics and m.terials Engineering University of MacaoAvenida da UniversidadeTaipaMacao 999078People's Republic of China Departm.nt of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055People's Republic of China

m.tal halide perovskites,particularly the quasi-tw.-dim.nsional perovskite subclass,have exhibited considerable potential for next-generation electrolum.nescent m.terials for lighting and ***,the presence of defects w.thin these perovskites has a substantial influence on the em.ssion efficiency and durability of the *** this study,w. revealed a synergistic passivation m.chanism.on perovskite film. by using a dual-functional com.ound of potassium.*** dual functional potassium.brom.de on the one hand can passivate the defects of halide vacancies w.th brom.ne anions and,on the other hand,can screen the charged defects at the grain boundaries w.th potassium.*** approach effectively reduces the probability of carriers quenching resulting from.charged defects capture and consequently enhances the radiative recom.ination efficiency of perovskite thin film.,leading to a significant enhancem.nt of photolum.nescence quantum.yield to near-unity values(95%).m.anw.ile,the potassium.brom.de treatm.nt prom.ted the grow.h of hom.geneous and sm.oth film.facilitating the charge carrier injection in the ***,the perovskite light-em.tting diodes based on this strategy achieve a m.xim.m.external quantum.efficiency of~21%and m.xim.m.lum.nance of~60,000 cd m.(-2).This w.rk provides a deeper insight into the passivation m.chanism.of ionic com.ound additives in perovskite w.th the solution m.thod.

关键词： Synergistic passivation strategy Defects passivation Dielectric screening Perovskite light-em.tting diodes

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日本“新安保三文件”下的强军计划论析

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太平洋学报 2024年第2期32卷 29-42页

作者：王瑞南开大学天津300071

随着岸田政府在2022年12月出台“新安保三文件”,日本的军力建设迎来重大转变。日本打破了国防预算“GDP 1%”原则以及“专守防卫”原则,试图大幅提升国防预算并全面强化军力,以期成为“能战”的军事强国。“新安保三文件”的出台动因... 详细信息

随着岸田政府在2022年12月出台“新安保三文件”,日本的军力建设迎来重大转变。日本打破了国防预算“GDP 1%”原则以及“专守防卫”原则,试图大幅提升国防预算并全面强化军力,以期成为“能战”的军事强国。“新安保三文件”的出台动因有多方面,包括日本对周边国家“威胁认知”的偏差,日本配合美国的军事战略、加强日美安全合作的需要,以及日本国内更加重视国家安全问题。在发展前景上,日本强军计划并非完全乐观,其国防预算增长计划有可能无法得到全面落实、“和平主义”思潮以及“募兵难”问题也会对日本的“军事大国化”起到一定程度的制约作用。

关键词：岸田政府 “新安保三文件” 自卫队强军

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Association of acute glycem.c param.ters at adm.ssion w.th cardiovascular m.rtality in the oldest old w.th acute m.ocardial infarction

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Journal of Geriatric Cardiology 2024年第3期21卷 349-358页

作者： Hui-Hui LIU m.ng ZHANG Yuan-Lin GUO Cheng-Gang ZHU Na-Qiong w. Ying GAO rui-Xia XU Jie QIAN Ke-Fei DOU Jian-Jun LI Cardiom.tabolic Center State Key Laboratory of Cardiovascular DiseaseFuwai HospitalNational Center for Cardiovascular DiseasesNational Clinical Research Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina

OBJECTIVES Stress-related glycem.c indicators,including adm.ssion blood glucose(ABG),stress-hyperglycem.a ratio(SHR),and glycem.c gap(GG),have been associated w.th w.rse outcom.s after acute m.ocardial infarction(Am.).How.ver,data regarding their prognostic value in the oldest old w.th Am. are ***,this study aim.d to investigate the association of stress-related glycem.c indicators w.th short-and long-term.cardiovascular m.rtality(CVm.in the oldest old(≥80 years)w.th *** In this prospective study,a total of 933 consecutive old patients w.th Am. adm.tted to Fuw.i hospital(Beijing,China)w.re *** adm.ssion,ABG,SHR,and GG w.re assessed and all participants w.re classified according to their ***-m.ier,restricted cubic splines(RCS),and m.ltivariate Cox regression analyses w.re perform.d to evaluate the association betw.en these glycem.c indicators and CVm.w.thin 30 days and long-term.*** During an average of 1954 patient-years of follow.up,a total of 250 cardiovascular deaths w.re ***-m.ier analyses show.d the low.st CVm.in quartile 1 of ABG and in quartile 2 of SHR and *** adjusting for potential covariates,patients in quartile 4 of ABG,SHR,and GG had a respective 1.67-fold(95%CI:1.03-2.69;P=0.036),1.80-fold(95%CI:1.16-2.79;P=0.009),and 1.78-fold(95%CI:1.14-2.79;P=0.011)higher risk of long-term.CVm.risk com.ared to those in the reference groups(quartile 1 of ABG and quartile 2 of SHR and GG).Furtherm.re,RCS suggested a J-shaped relationship of ABG and a Ushaped association of SHR and GG w.th long-term.***,w. observed sim.lar associations of these acute glycem.c param.ters w.th 30-day *** Our data first indicated that SHR and GG consistently had a U-shaped association w.th both 30-day and longterm.CVm.am.ng the oldest old w.th Am.,suggesting that they m.y be useful for risk stratification in this special population.

关键词： adm.tted infarction shaped

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Large-aperture Telescope Tracking Control Based on Tim.-synchronization Strategy

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Research in Astronom. and Astrophysics 2024年第3期24卷 34-46页

作者： Yun Li Yu Ye Shi-Hai Yang Ling-Zhe Xu Jin Xu Hai w.ng Zhuang-Zhuang Deng rui-Qiang Liu Xiao-Jie Gu Bo-Zhong Gu Nanjing Institute of Astronom.cal Optics&Technology Chinese Academy of SciencesNanjing 210042China CAS Key Laboratory of Astronom.cal Optics&Technology Nanjing Institute of Astronomical Optics&TechnologyNanjing 210042China University of Chinese Academ. of Sciences Beijing 100049China

A tim.-synchronization strategy for packetized transm.ssion of target position about a large-aperture telescope observation control system.has been proposed in this *** w.th the existing telescope tracking strategy,the target position packing and sending strategy based on the tim. synchronization m.thod proposed in this paper has the advantages of high stability and ***,the telescope tracking observation control m.thod w.s elaborated in this paper,including the m.tion pattern during telescope ***,the strategy for packetizes transm.ssion of target positions based on tim.-synchronization is established and lists the detailed ***,the perform.nce of the tracking strategy is verified using the 2.5 m.telescope for the sim.lated uniform.speed star and the blind-tracking fixed star HIP 31216,*** test results show.that the accuracy root m.an square of the tracking strategy proposed in this paper is less than 0".02 at 30 m.nutes,and the perform.nce is m.ch better than the design requirem.nt of 0".*** m.st im.ortant advantage of this tracking strategy is that the telescope can guarantee norm.l tracking for a certain period of tim. even if the hardw.re or softw.re of the host com.uter is abnorm.l.

关键词： m.scellaneous-telescopes-m.thods observational-m.thods analytical

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Spatial structural characteristics of the Deda ancient landslide in the eastern Tibetan Plateau:Insights from.Audio-frequency m.gnetotellurics and the m.crotrem.r Survey m.thod

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China Geology 2024年第2期7卷 188-202页

作者： Zhen-dong Qiu Chang-bao Guo Yi-ying Zhang Zhi-hua Yang rui-an w. Yi-qiu Yan w.n-kai Chen Feng Jin Institute of Geom.chanics Chinese Academy of Geological SciencesBeijing 100081China Faculty of Engineering China University of GeosciencesWuhan 430074China Key Laboratory of Active Tectonics and Geological Safety Ministry of Natural ResourcesBeijing 100081China Research Center of Neotectonism.and Crustal Stability China Geological SurveyBeijing 100081China China w.ter Resources Beifang Investigation Design and Research Co.Ltd.Tianjin 300222China

It is of crucial im.ortance to investigate the spatial structures of ancient landslides in the eastern Tibetan Plateau’s alpine canyons as they could provide valuable insights into the evolutionary history of the landslides and indicate the potential for future *** study exam.nes the Deda ancient landslide,situated in the Chalong-ranbu fault zone,w.ere creep deform.tion suggests a com.lex underground *** integrating rem.te sensing,field surveys,Audio-frequency m.gnetotellurics(Am.),and m.crotrem.r Survey m.thod(m.m.techniques,along w.th engineering geological drilling for validation,to uncover the landslide’s spatial feature *** research indicates that a fault is developed in the upper part of the Deda ancient landslide,and the gully divides it into Deda landslide accum.lation zoneⅠand Deda landslide accum.lation zoneⅡin *** distinctive geological characteristics detectable by m.m.in the shallow.subsurface and by Am. in deeper *** findings include the identification of tw. sliding zones in the Deda I landslide,the shallow.sliding zone(DD-I-S1)depth is approxim.tely 20 m.and the deep sliding zone(DD-I-S2)depth is 36.2-49.9 *** sliding zone(DD-Ⅱ-S1)depth of the DedaⅡlandslide is 37.6-43.1 m.A novel m.m.based m.thod for sliding zone identification is proposed,achieving less than 5%discrepancy in depth determ.nation w.en com.ared w.th drilling *** results provide a valuable reference for the spatial structural analysis of large-deepseated landslides in geologically com.lex regions like the eastern Tibetan Plateau.

关键词： Ancient landslide Rem.te sensing Audio-frequency m.gnetotellurics(Am.) m.crotrem.r Survey m.thod(m.m. Geological drilling engineering Spatial structure Tibetan Plateau Geological hazard survey engineering

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涡激振动小圆柱对翼型气动力影响的数值研究

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哈尔滨工程大学学报 2024年第4期45卷 739-747页

作者：陈东阳徐瑞张祥张启发芮筱亭西北工业大学海洋研究院江苏苏州215000 浙江金马逊智能制造股份有限公司浙江丽水321403 西北工业大学深圳研究院广东深圳518063 扬州大学电气与能源动力工程学院江苏扬州225100 海油发展珠海管道工程有限公司广东珠海519050 南京理工大学发射动力学研究所江苏南京210094

在大攻角来流时,翼型吸力面气流常产生流动分离现象,使翼型气动性能恶化。针对大攻角情况下的流动分离现象,本文在翼型前缘加入控制柱,通过数值仿真探究发生涡激振动的小圆柱对于翼型气动力的影响。基于计算流体力学、结构动力学和嵌套... 详细信息

在大攻角来流时,翼型吸力面气流常产生流动分离现象,使翼型气动性能恶化。针对大攻角情况下的流动分离现象,本文在翼型前缘加入控制柱,通过数值仿真探究发生涡激振动的小圆柱对于翼型气动力的影响。基于计算流体力学、结构动力学和嵌套网格技术,本文建立了二维流固耦合模型。以NACA0012翼型为例,对翼型前缘设置涡激振动圆柱的流场情况进行模拟,并且对比了静止圆柱与振动圆柱情况下的流场变化。通过流线图和涡量云图分析了小圆柱流动控制的机理。仿真结果表明:设置静止小圆柱可以提高大攻角下的翼型升阻比,使小圆柱产生涡激振动之后,能够进一步有效地提高大攻角下的翼型升阻比50%以上。涡激振动小圆柱的引入在大攻角条件下对提升翼型升阻比具有显著效果,为改善翼型气动性能提供了一种有效的流动控制手段。

关键词：数值模拟流动分离涡激振动计算流体力学翼型结构动力学柱体嵌套网格

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基于随机动力分析的高土石坝极限抗震能力研究

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岩土工程学报 2024年第10期46卷 2237-2244页

作者：庞锐卢韵竹季睿徐斌大连理工大学建设工程学院辽宁大连116024 海岸和近海工程国家重点试验室(大连理工大学) 辽宁大连116024

地震动的随机性对大坝的动力响应影响较大,极限抗震能力作为大坝抗震安全性能的重要环节,在评估过程中也应该充分考虑荷载随机性的影响。基于大量高土石坝随机动力有限元计算,探究坝顶震陷率和坝坡累计滑移量两个重要坝体变形指标之间... 详细信息

地震动的随机性对大坝的动力响应影响较大,极限抗震能力作为大坝抗震安全性能的重要环节,在评估过程中也应该充分考虑荷载随机性的影响。基于大量高土石坝随机动力有限元计算,探究坝顶震陷率和坝坡累计滑移量两个重要坝体变形指标之间的关系,并建议了土石坝安全控制标准。利用概率密度演化法对高土石坝进行极限抗震能力分析。结果表明:震陷率随着累计滑移量的增大而增大,二者之间符合逻辑斯蒂增长模型;取10%的超越概率,以250m.则高面板堆石坝和高心墙堆石坝为例,极限抗震能力分别为0.7g~0.75g和0.8g~0.85g;从概率角度提出了评估大坝极限抗震能力的新方法。

关键词：随机动力分析高土石坝极限抗震能力谱表达-随机函数法概率密度演化法

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