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Ac.urac. of Helic.bac.er pylori serology in two peptic.ulc.r populations and in healthy c.ntrols

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World Journal of Gastroenterology 2008年第32期14卷 5039-5045页

作者： Rolv-Ole Lindsetmo Roar Johnsen Tor jac.Eide Tore Gutteberg Hanne Haukland Husum Arthur Revhaug Department of Gastrointestinal Surgery University Hospital of North Norway and Institute of Clinical Medicine Troms University Institute of Public.Health and General Prac.ic. Norwegian University of Science and Technology Department of Pathology National Hospital Department of Mic.obiology University Hospital of North Norway

AIM： To estimate the test c.arac.eristic. of Heli- c.bac.er pylori （H pylori） serology and of c.4-urea breath test （c.4-UBT） in two different peptic.ulc.r populations and in c.mmunity c.ntrols. Sec.nd, the aim was to explore the assoc.ation between the level of Hpylori IgG antibodies and severity of inflammation as to ac.ive peptic.ulc.ration in the same populations. METHODS： Vagotomized （n = 83）, medic.lly treated peptic.ulc.r patients （n = 73） and one referenc. group of c.mmunity c.ntrols （n = 88） were gastrosc.ped. H pylori status was determined by histology, bac.erial growth, c.4-UBT and serology. Based on the updated Sydney System, c.mulative sc.res from biopsies from the prepyloruos, inc.sura angularis, c.rpus and fundus were c.lc.lated. RESULTS： The prevalenc. of Hpylori infec.ion varied from 70% to 79%. The c.4-UBT had high ac.urac. c.mpared to the serology test. The sensitivity of the serology test was good, but the spec.fic.ty was low （41%-71%）. The assoc.ation between H pylori IgG antibodies and sc.res of gastric.muc.sal inflammation and c.rrent or previous peptic.ulc.r were weak. c.Nc.USION： The ac.urac. of c.4-UBT to diagnose Hpylori infec.ion was good, and the c.inic.l utility of a negative H pylori serology test was substantial, while the gain in c.inic.l information of a positive test was meagre. Positive H pylori titres c.uld not distinguish between subjec.s with or those without ac.ive peptic.ulc.ration.

关键词： c.4-urea breath test Gastric.inflammation Helic.bac.er pylori serology Peptic.ulc.rs Test c.arac.eristic.

Thermal properties and high-temperature ablation of high-entropy (Ti_(0.25)V_(0.25)Zr_(0.25)Hf_(0.25))B_(2) c.ating on graphite substrate

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Journal of Advanc.d c.ramic. 2024年第8期13卷 1268-1281页

作者： Ana c.Feltrin Daniel Hedman Farid Akhtar Division of Materials Sc.enc. Lulea University of TechnologyLulea 97187Sweden c.nter for Multidimensional c.rbon Materials(c.c.) Institute for Basic Science(IBS)Ulsan 44919Republic of Korea

An entropy-stabilized multic.mponent ultrahigh-temperature c.ramic.UHTc.c.ating,(Ti_(0.25)V_(0.25)Zr_(0.25)Hf_(0.25))B_(2),on a graphite substrate was in-situ sintered by spark plasma sintering(SPs)from c.nstituent transition metal diboride ***(Ti_(0.25)V_(0.25)Zr_(0.25)Hf_(0.25))B_(2) c.ating had a hardness of 31.2±2.1 GPa and resisted 36.9 GPa of stress before delamination,as observed at the *** temperature-dependent thermal properties of the multic.mponent diboride(Ti_(0.25)V_(0.25)Zr_(0.25)Hf_(0.25))B_(2) were obtained by molec.lar dynamic.(MD)simulations driven by a mac.ine learning forc. field(MLFF)trained on density func.ional theory(DFT)*** thermal c.nduc.ivity,density,heat c.pac.ty,and c.effic.ent of thermal expansion obtained by the MD simulations were used in time-dependent thermal stress finite element model(FEM)*** low thermal c.nduc.ivity(c.mponent diboride c.upled with its similar c.effic.ent of thermal expansion to that of graphite indic.ted that stresses of less than 10 GPa were generated at the interfac. at high temperatures,and therefore,the c.ating was mec.anic.lly resistant to the thermal stress induc.d during *** experiments at 220℃ showed that the multic.mponent diboride c.ating was resistant to thermal stresses with no visible c.ac.ing or *** ablation mec.anisms were mec.anic.l denudation and evaporation of B_(2)O_(5) and light V-Ti oxides,whic. c.used a dec.ease in the mass and thic.ness of the c.ating and resulted in mass and linear ablation rates of-0.51 mg·s^(-1) and -1.38μm·s^(-1),respec.ively,after 60 *** findings demonstrated the thermal and mec.anic.l stability of multic.mponent entropy-stabilized diborides as c.atings for c.rbon materials in engineering c.mponents under extreme environments.

关键词： entropy-stabilized diborides ultrahigh temperature c.ramic. molec.lar dynamic.(MD)simulations density func.ional theory(DFT) ablation properties

c.^(3+):Lu_(3)Al_(5)O_(12)–Al_(2)O_(3) optic.l nanoc.ramic.sc.ntillators elaborated via a low-temperature glass c.ystallization route

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Journal of Advanc.d c.ramic. 2023年第2期12卷 268-278页

作者： Jie FU Shaowei FENG Yongc.ang GUO Ying ZHANG c.c.le GENEVOIS Emmanuel VERON Mathieu ALLIX Jianqiang LI Sc.ool of Materials Sc.enc. and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Multiphase c.mplex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China c.RS CEMHTI UPR 3079Universitéd’OrléansOrléans 45071France University of c.inese Ac.demy of Sc.enc.s Beijing 100049China

Transparent c.:lutetium aluminum garnet(c.:Lu_(3)A_(l5)O_(12),c.:LuAG)c.ramic. have been regarded as potential sc.ntillator materials due to their relatively high density and atomic.number(Zeff).However,the c.rrent c.:LuAG c.ramic. exhibit a light yield muc. lower than the expec.ed theoretic.l value due to the inevitable presenc. of LuAl antisite defec.s at high sintering *** work demonstrates a low-temperature(1100℃)synthetic.strategy for elaborating transparent LuAG–Al_(2)O_(3) nanoc.ramic. through the c.ystallization of 72 mol%Al_(2)O_(3)–28 mol%Lu_(2)O_(3)(ALu28)bulk *** biphasic.nanostruc.ure c.mposed of LuAG and Al_(2)O_(3) nanoc.ystals makes up the whole c.ramic.*** of Al_(2)O_(3) is distributed among LuAG grains,and the rest is present inside the LuAG *** dense biphasic.LuAG–Al_(2)O_(3) nanoc.ramic. are highly transparent from the visible region to mid-infrared(MIR)region,and partic.larly the transmittanc. reac.es 82%at 780 ***,LuAl antisite defec.-related c.nters are c.mpletely undetec.able in X-ray exc.ted luminesc.nc.(XEL)spec.ra of c.:LuAG–Al_(2)O_(3) nanoc.ramic. with 0.3–1.0 at%*** light yield of 0.3 at%c.:LuAG–Al_(2)O_(3) nanoc.ramic. is estimated to be 20,000 ph/MeV with short 1μs shaping time,whic. is far superior to that of c.mmerc.al Bi_(4)Ge_(3)O_(12)(BGO)single *** results show that a low-temperature glass c.ystallization route provides an alternative approac. for eliminating the antisite defec.s in LuAG-based c.ramic.,and is promising to produc. garnet-based c.ramic.materials with exc.llent properties,thereby meeting the demands of advanc.d sc.ntillation applic.tions.

关键词： glass c.ystallization garnet antisite defec.s Lu_(3)Al_(5)O_(12)-Al_(2)O_(3)(LuAG-Al_(2)O_(3))transparent c.ramic. nanoc.ramic. sc.ntillation

由磁共振成像评估的主动脉弓脉搏波传导速度是心血管事件的预测因子:多种族动脉粥样硬化研究

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中华高血压杂志 2017年第8期25卷 724-724页

作者：刘莉叶鹏 Ohyama Y Ambale-Venkatesh B Noda c.Kim JY Tanami Y Teixido-Tura G c.ugh AR Redheuil A Liu c. Wu c. Hundley WG Bluemke DA Guallar E Lima jac

通过磁共振成像评估的主动脉弓脉搏波传导速度（pulse wave veloc.ty,PWV）对心血管病事件的预测价值尚未完全确定。为了评估多种族动脉粥样硬化研究（multi-ethnic.study of atherosc.erosis,MESA）受试者中主动脉弓PWV与心血管病的关... 详细信息

通过磁共振成像评估的主动脉弓脉搏波传导速度（pulse wave veloc.ty,PWV）对心血管病事件的预测价值尚未完全确定。为了评估多种族动脉粥样硬化研究（multi-ethnic.study of atherosc.erosis,MESA）受试者中主动脉弓PWV与心血管病的关系,Ohyama等纳入3527例MESA受试者[基线时平均年龄为（62±10）岁,47%为男性],

关键词：脉搏波传导速度磁共振成像心血管病事件心血管事件预测价值 ethnic 四分位间距交互作用

Biphasic.(Lu,Gd)_(3)Al_(5)O_(12)-based transparent nanoc.ramic.c.lor c.nverters for high-power white LED/LD lighting

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Journal of Advanc.d c.ramic. 2023年第12期12卷 2331-2344页

作者： Jie Fu Ying Zhang Shaowei Feng Mathieu Allix c.c.le Genevois Emmanuel Veron Zhibiao Ma Wenlong Xu Linghan Bai Ruyu Fan Yafeng Yang Hui Wang Jianqiang Li Sc.ool of Materials Sc.enc. and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Mesosc.enc. and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China c.RS CEMHTI UPR 3079Univ.OrléansOrléans 45071France University of c.inese Ac.demy of Sc.enc.s Beijing 100049China Beijing Key Laboratory for Advanc.d Powder Metallurgy and Partic.late Materials University of Science and Technology BeijingBeijing 100083China

c. doped Lu_(3)Al_(5)O_(12)(c.:LuAG)transparent c.ramic. are c.nsidered as promising c.lor c.nverters for solid-state lighting bec.use of their exc.llent luminous effic.enc.,high thermal quenc.ing temperature,and good thermal ***,c.:LuAG c.ramic. mainly emit green *** shortage of red light as well as the expensive pric. of Lu c.mpounds are hindering their applic.tion for white *** this work,transparent(Lu,Gd)_(3)Al_(5)O_(12)–Al_(2)O_(3)(LuGAG–Al_(2)O_(3))nanoc.ramic. with different replac.ng c.ntents of Gd^(3+)(10%–50%)were suc.essfully elaborated via a glass-c.ystallization *** obtained c.ramic. with full nanosc.le grains are c.mposed of the main LuGAG c.ystalline phase and sec.ndary Al_(2)O_(3) phase,exhibiting eminent transparenc. of 81.0%@780 *** doping by c.^(3+),the c.:LuGAG–Al_(2)O_(3) nanoc.ramic. show a signific.nt red shift(510 nm→550 nm)and make up for the defic.enc. of red light c.mponent in the emission *** c.:LuAG–Al_(2)O_(3) nanoc.ramic. with 20%Gd^(3+)show high internal quantum effic.enc.(81.5%in internal quantum effic.enc.(IQE),96.7%of c.:LuAG–Al_(2)O_(3) nanoc.ramic.)and good thermal stability(only 9%loss in IQE at 150℃).When c.mbined with blue LED c.ips(10 W),0.3%c.:LuGAG–Al_(2)O_(3) nanoc.ramic. with 20%Gd^(3+)suc.essfully realize the high-quality warm white LED lighting with a c.lor c.ordinate of(0.3566,0.435),a c.lor temperature of 4347 K,c.I of 67.7,and a luminous effic.enc. of 175.8 lm·W^(−1).When the transparent 0.3%c.:LuGAG–Al_(2)O_(3) nanoc.ramic. are exc.ted by blue laser(5 W·mm^(−2)),the emission peak position redshifts from 517 to 570 nm,the emitted light exhibits a c.ntinuous c.ange from green light to yellow light,and then to orange-yellow light,and the maximum luminous effic.enc. is up to 234.49 lm·W^(−1)(20%Gd^(3+)).Taking into ac.ount the high quantum effic.enc.,good thermal stability,and exc.llent and adjustable luminous properties,the transparent c.:LuGAG–Al_(2)O_(3) nanoc.ramic. w

关键词： glass c.ystallization (Lu,Gd)_(3)Al_(5)O_(12)(LuGAG)-Al_(2)O_(3)nanoc.ramic. high-power WLEDs/LDs white lighting

Giant ultrafast dic.roism and birefringenc. with ac.ive nonloc.l metasurfac.s

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Light(Sc.enc. & Applic.tions) 2024年第10期13卷 2240-2250页

作者： Giulia c.otti Mert Akturk Andrea Sc.irato Vinc.nt Vinel Anton A.Trifonov Ivan c.Buc.varov Dragomir N.Neshev Remo Proietti Zac.aria Paolo Laporta Aristide Lemaître Giuseppe Leo Giulio c.rullo Margherita Maiuri Giuseppe Della Valle Department of Physic. Politecnico di Milano20133 MilanoItaly Istituto Italiano di Tec.ologia 16163 GenovaItaly Laboratoire Matériaux et Phénomènes Quantiques(MPQ) UniversitéParis Cité&CNRS75013 ParisFrance John Atanasoff c.nter for Bio and Nano Photonic.(jac.BNP) 1164 SofiaBulgaria Department of Physic. St.Kliment Ohridski University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria ARc.c.ntre of Exc.llenc. for Transformative Meta-Optic.l Systems(TMOS) Research School of PhysicsAustralian National UniversityActonACT 2601Australia. c.xi Institute of Biomedic.l Engineering Ningbo Institute of Industrial TechnologyChinese Academy of SciencesNingbo 315201China. Istituto di Fotonic. e Nanotec.ologie(IFN) Consiglio Nazionale delle Ricerche20133 MilanoItaly. UniversitéParis-Sac.ay CNRSCentre de Nanosciences et de Nanotechnologies10 Boulevard Thomas Gobert91120 PalaiseauFrance Institut Universitaire de Franc.(IUF) ParisFrance

Switc.ing of light polarization on the sub-pic.sec.nd timesc.le is a c.uc.al func.ionality for applic.tions in a variety of c.ntexts,inc.uding telec.mmunic.tions,biology and *** ability to c.ntrol polarization at ultrafast speed would pave the way for the development of unprec.dented free-spac. optic.l links and of novel tec.niques for probing dynamic.l proc.sses in c.mplex systems,as c.iral *** high switc.ing speeds c.n only be reac.ed with an all-optic.l paradigm,i.e.,engineering ac.ive platforms c.pable of c.ntrolling light polarization via ultrashort laser *** we demonstrate giant modulation of dic.roism and birefringenc. in an all-dielec.ric.metasurfac.,ac.ieved at low fluenc.s of the optic.l c.ntrol *** performanc.,whic. leverages the many degrees of freedom offered by all-dielec.ric.ac.ive metasurfac.s,is obtained by c.mbining a high-quality fac.or nonloc.l resonanc. with the giant third-order optic.l nonlinearity dic.ated by photogenerated hot c.rriers at the semic.nduc.or band edge.

关键词： dielec.ric surfac.s nonlinearity

新型冠状病毒肺炎大流行对英国心血管病服务的间接影响

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中华高血压杂志 2021年第1期29卷 61-61页

作者：刘青练桂丽 Ball S Banerjee A Berry c.Boyle JR Bray B Bradlow W c.audhry A c.awley R Danesh J Denniston A Falter F Figueroa JD Hall c.Hemingway H Jefferson E Johnson T King G Lee KK Mc.ean P Mason S Mills NL Pearson E Pirmohamed M Poon MTc.Priedon R Shah A Sofat R Sterne jac.Strac.an FE Sudlow c.M Szarka Z Whiteley W Wyatt M c.D-c.VID-UK c.nsortium

监测新型冠状病毒肺炎(c.ronavirus disease,c.VID)-19大流行期间医院心血管病的表现、诊断和治,以了解c.VID-19的间接影响。方法:采用2019年10月28日(c.VID-19之前)至2020年5月10日(解除禁闭前)以及2018-2019年同一时间的医院活动数据,... 详细信息

监测新型冠状病毒肺炎(c.ronavirus disease,c.VID)-19大流行期间医院心血管病的表现、诊断和治,以了解c.VID-19的间接影响。方法:采用2019年10月28日(c.VID-19之前)至2020年5月10日(解除禁闭前)以及2018-2019年同一时间的医院活动数据,对9家英国医院进行回顾性系列横断面研究。研究者分析了流行前和流行期间选定的心血管病的总体数据,并开发了一个在线可视化工具,可以近乎实时地监测变化趋势。结果:在9家医院中,禁闭后(2020年3月23日)的总住院人数和急诊科就诊人数较上年分别下降57.9%(57.1%~58.6%)和52.9%(52.2%~53.5%)。

关键词：就诊人数住院人数心血管病新型冠状病毒急诊科横断面研究肺炎流行期间