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固体气泡损伤探测器阈起源的实验判别

核技术 2002年第7期25卷 506-510页

作者：郭士伦李丽 Doke t Kikuchi J terasawa K Hara K Sakuma N Yasuda N Murakami t 中国原子能科学研究院核物理研究所北京102413 Advanced Research Institute for Science and Engineering Waseda University National Institute of Radiological Science

用 5 0 0MeV/u56Fe,6 5 0MeV/u40Ar ,6 0 0MeV/u2 8Si和 180MeV/u4He对固体气泡损伤探测器 (t- 12型 )进行了实验研究 ,实验结果表明 ,固体气泡损伤探测器的阈特性可用临界能量损失率表征。在一般条件下 ,限定能量损失率在不同重离子产... 详细信息

用 5 0 0MeV/u56Fe,6 5 0MeV/u40Ar ,6 0 0MeV/u2 8Si和 180MeV/u4He对固体气泡损伤探测器 (t- 12型 )进行了实验研究 ,实验结果表明 ,固体气泡损伤探测器的阈特性可用临界能量损失率表征。在一般条件下 ,限定能量损失率在不同重离子产生径迹时不具有相同临界值 ,因此。

关键词：固体气泡损伤探测器阈起源临界能量损失率限定能量损失率

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溴甲烷熏蒸检疫处理油桃上的苹果蠹蛾

植物检疫 1989年第5期 336-338页

作者： V.Y.Yokoyama g.t.Miller P.L.Hartsell 秦吉强李呜

美国已决定向日本出口6个早—中熟品种的加利福尼亚油桃(根据加州萨克拉门托市的加利福亚木本水果协议)。Smith(1940),Madsen 和 Borden(1954)把加

关键词：油桃苹果甲烷出口日本中熟品种李光桃苹果属沼气烷烃检疫处理果实表面

Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-PEDOt mats

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Journal of Environmental Sciences 2021年第2期33卷 62-73页

作者： Romario J.da Silva Lizeth Carolina Mojica-Sanchez Filipe D.S.gorza graciela C.Pedro Bruna g.Maciel gabriela P.Ratkovski Herica D.daRocha Kamila t.O.do Nascimento Juan CMedina-Llamas Alicia E.Chavez-guajardo Jose J.Alcaraz-Espinoza Celso P.de Melo Program a de Pos-graduagao em Ciencia de Materials U niversidade Federal de Pernambuco50670-901 RecifePEBrazil Departamento de Ffsica Uniuersidade Federal de Pemambiico50670-901 Reci/ePEBrazil Centro de Estudios Cientificosy tecnologicos No.18 Instituto Politecnico Nacional98160 ZacatecasZacMexico Unidad Academica de Ciencias de la tierra Uniuersidad Aut6noma de Zacatecas98058 ZacatecasZacMexico Departamento de Quimica Universidad Autonoma Metropolitana09340Ciudad de MexicoMexico

We report the preparation of poly(3,4-ethylene dioxythiophene)(PEDOt)-modified polyvinylidene fluoride electrospun fibers and their use as a novel adsorbent material for the removal of the anionic dye Methyl Orange(MO)from aqueous *** novel adsorbent material can be used to selectively remove MO on a wide p H range(3.0-10.0),with a maximum capacity of 143.8 mg/g at p H *** used in a recirculating filtration system,the maximum absorption capacity was reached in a shorter time(20 min)than that observed for batch mode experiments(360 min).Based on the analyses of the kinetics and adsorption isotherm data,one can conclude that the predominant mechanism of interaction between the membrane and the dissolved dye molecules is ***,considering the estimated values for the gibbs energy,and entropy and enthalpy changes,it was established that the adsorption process is spontaneous and occurs in an endothermic *** good mechanical and environmental stability of these membranes allowed their use in at least 20 consecutive adsorption/desorption cycles,without significant loss of their *** suggest that the physical-chemical characteristics of PEDOt make these hybrid mats a promising adsorbent material for use in water remediation protocols and effluent treatment systems.

关键词： Electrospinning Composite mats Pedot Pvdf mats Dye removal Water remediation

Which psychosocial factors are associated with return to sport following concussion? A systematic review

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Journal of Sport and Health Science 2022年第4期11卷 438-449页

作者： Jacqueline van Ierssel Kaleigh Ferdinand Pennock Margaret Sampson Roger Zemek Jeffrey g.Caron Children’s Hospital of Eastern Ontario Research Institute OttawaON K1H 8L1Canada Faculty of Kinesiology and Physical Education University of TorontoTorontoON M5S 2W6Canada Department of Pediatrics Faculty of MedicineUniversity of OttawaOttawaON K1H 8M5Canada Faculty of Medicine University of MontrealMontrealQC H3T 1J4Canada Center for Interdisciplinary Research in Rehabilitation MontrealQC H3S 1M9Canada

Background:Psycho social factors predict recurrent inj ury and return to preinjury level of performance following orthopedic injury but are poorly understood following *** management protocols prioritize physical measures of ***,the objective of this study was to describe the psychosocial factors associated with return to sport(RtS) and how they are measured in athletes who sustained a ***:MEDLINE,Embase,APA PsycINFO,CINAHL,and SPORtDiscus were searched through February 2,*** studies included original peer-reviewed publications describing psychosocial factors associated with RtS following a diagnosed *** primary outcome was scales or measures employed and/or key thematic ***:Of the 3615 studies identified,10 quantitative cohort studies(Oxford Centre for Evidence-Based Medicine Level-3) representing 2032 athletes(85% male;high-school and collegiate collision/contact athletes) and 4 qualitative studies representing 66 athletes(74% male;70% American football;aged 9-28 years) were *** identified 3 overarching themes and 10 outcome measures related to psychosocial factors associated with RtS following concussion:(a) fear(e.g,of recurrent concussion,of RtS,of losing playing status);(b) emotional factors(e.g,depression,anxiety,perceived stress,mental health,disturbance mood);and(c) contextual factors(e.g,social support,pressure,sense of identity).Conclusion:Although current medical clearance decisions prioritize physical measures of recovery,evidence suggests diverse psychosocial factors influence RtS following *** remains unclear which psychosocial factors contribute to a successful RtS,including the influence of sex/gender and *** studies should evaluate the association of psychological readiness with physical measures of recovery at medical clearance,preinjury level of performance,and risk of recurrent concussion to support RtS clinical decision-making.

关键词： Concussion Recovery Rehabilitation Sport psychology Sporting injuries

Synthesis and electrocatalytic applications of flower-like motifs and associated composites of nitrogen-enriched tungsten nitride(W2N3)

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Nano Research 2020年第5期13卷 1434-1443页

作者： Sha tan Brian M.tackett Qun He Ji Hoon Lee Jingguang g.Chen Stanislaus S.Wong Department of Chemistry State University of New York at Stony BrookStony BrookNY 11794-3400USA Department of Chemical Engineering Columbia UniversityNew YorkNY 10027USA Chemistry Department Building 555Brookhaven National LaboratoryUptonNY 11973USA

We have sought to improve the electrocatalytic performance of tungsten nitride through synthetic control over chemical composition and *** particular,we have generated a thermodynamically unstable but catalytically promising nitrogen-rich phase of tungsten via a hydrothermal generation of a tungsten oxide intermediate and subsequent annealing in *** net product consisted of three-dimensional(3D)micron-scale flower-like motifs of W2N3;this architecture not only evinced high structural stability but also incorporated the favorable properties of constituent two-dimensional *** a performance perspective,as-prepared 3D W2N3 demonstrated promising hydrogen evolution reaction(HER)activities,especially in an acidic environment with a measured overpotential value of−101 mV at a current density of 10 mA/cm^*** further enhance the electrocatalytic activity,small amounts of precious metal nanoparticles(such as Pt and Au),consisting of variable sizes,were uniformly deposited onto the underlying 3D W2N3 motifs using a facile direct deposition method;these composites were applied towards the CO2 reduction reaction(CO2RR).A highlight of this series of experiments was that Au/W2N3 composites were found to be a much more active HER(as opposed to either a CO2RR or a methanol oxidation reaction(MOR))catalyst.

关键词： tungsten nitride synthesis composite morphology control electrocatalysis

具有抗艾滋病毒活性的多肽t22([t_(yr)^(5,12),L_(ys)~7]-Polyphemusin Ⅱ)骨架构象模拟

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科学通报 2001年第12期46卷 999-1002页

作者：孙命车晔缪方明 g.R.Marshall 天津师范大学晶体化学研究所天津300074 Center for Molecular Design Washington University

用势能平滑搜索方法，在平滑修饰的势能面上对具有抗艾滋病毒ＨＩＶ－ｌ活性的肽Ｔ２２（［Ｔ５，１２yr,Ｌ７yr］－ＰｏｌｙＰｈｅｍｕｓｉｎ Ⅱ）骨架结构进行了全程搜索，得到该分子骨架结构在修饰势能面上的分子构象全集．用多构象... 详细信息

用势能平滑搜索方法，在平滑修饰的势能面上对具有抗艾滋病毒ＨＩＶ－ｌ活性的肽Ｔ２２（［Ｔ５，１２yr,Ｌ７yr］－ＰｏｌｙＰｈｅｍｕｓｉｎ Ⅱ）骨架结构进行了全程搜索，得到该分子骨架结构在修饰势能面上的分子构象全集．用多构象优化方法，选择较适用于肽ＯＰＬＳ力场，采用ＧＢ／ＳＡ水溶剂模型，优化上述构象集，得到Ｔ２２骨架结构在水溶液中优势构象集．结果表明势能平滑搜索与多构象优化相结合的构象分析方法是解决含有环结构的柔性分子构象分析中多重最小问题的有效方法．

关键词： t22([tyr^5,12,Lys^7]-PolyphemusinⅡ) HIV-1构象势能面水溶剂模型多肽抗艾滋病毒活性骨架结构

Knee biomechanics of patients with total knee replacement during downhill walking on different slopes

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Journal of Sport and Health Science 2022年第1期11卷 50-57页

作者： Chen Wen Harold E.Cates Joshua t.Weinhandl Scott E.Crouter Songning Zhang Department of Kinesiology Recreationand Sport StudiesUniversity of TennesseeKnoxvilleTN 37996USA tennessee Orthopedic Clinics KnoxvilleTN 37923USA

Purpose:the purpose of this study was to compare knee biomechanics of the replaced limb to the non-replaced limb of total knee replacement(tKR)patients and healthy controls during walking on level ground and on decline surfaces of 5°,10°,and 15°.Methods:twenty-five tKR patients and 10 healthy controls performed 5 walking trials on different decline slopes on a force platform and an instrumented ramp *** analyses of variance,2×2(limb×group)and 2×4(limb×decline slope),were used to examine selected biomechanics ***:the replaced limb of tKR patients had lower peak loading-response and push-off knee extension moment than the non-replaced and the matched limb of healthy *** differences were found in loading-response and push-off knee internal abduction moments among replaced,non-replaced,and matched limb of healthy *** knee flexion range of motion,peak loading-response vertical ground reaction force,and peak knee extension moment increased across all slope comparisons between 0°and 15°in both the replaced and non-replaced limb of tKR ***:Downhill walking may not be appropriate to include in early stage rehabilitation exercise protocols for tKR patients.

关键词： Decline surface Knee adduction moment Knee joint moment total knee arthroplasty

青藏高原地形重力波对东亚春季降水的重要作用

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中国科学:地球科学 2023年第11期53卷 2639-2647页

作者：李闰秋徐昕徐祥德 theodore g.SHEPHERD 王元南京大学中尺度灾害天气实验室南京大学大气科学学院南京210023 中国气象科学研究院灾害天气国家重点实验室北京100081 Department of Meteorology University of ReadingReading RG66BBUK

春季持续性降水是东亚夏季风爆发前的主要雨季,对东亚地区乃至全球水循环都具有深刻影响.过去研究揭示了青藏高原大尺度地形的动力和热力作用对东亚春季降水的重要影响,但青藏高原小尺度地形的作用尚不明确.本研究发现,副热带西风流受... 详细信息

春季持续性降水是东亚夏季风爆发前的主要雨季,对东亚地区乃至全球水循环都具有深刻影响.过去研究揭示了青藏高原大尺度地形的动力和热力作用对东亚春季降水的重要影响,但青藏高原小尺度地形的作用尚不明确.本研究发现,副热带西风流受青藏高原小尺度地形扰动激发的地形重力波,同样对东亚春季降水具有重要贡献.垂直传播的地形重力波在对流层中层发生破碎,产生纬向拖曳,从而驱动跨越青藏高原的经向环流.在青藏高原南侧,经向环流上升支的动力抽吸作用使得对流层低层气压减弱,从而增强经向气压梯度力和西南季风,将更多水汽输送至下游东亚地区,最终导致春季降水的增多.该研究有助于更加全面地理解青藏高原多尺度地形对东亚春季降水的影响,为西风-季风协同作用提供了新的视角.

关键词：青藏高原地形重力波季风春季持续性降水

No signature of selection on the C-terminal region of glucose transporter 2 with the evolution of avian nectarivory

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Avian Research 2020年第4期11卷 380-390页

作者： Alexander M.Myrka tooba Shah Jason t.Weir Kenneth C.Welch Jr. Department of Cell and Systems Biology University of Toronto25 Harbord St.TorontoON M5S 3G5Canada Department of Biological Sciences University of Toronto Scarborough1265 Military TrailTorontoON M1C 1A4Canada Department of Ecology and Evolutionary Biology University of Toronto Scarborough1265 Military TrailTorontoON M1C 1A4Canada

Background:Flying birds,especially those that hover,need to meet high energetic *** that meet this demand through nectarivory face the added challenges of maintaining homeostasis in the face of spikes in blood sugar associated with nectar meals,as well as transporting that sugar to energetically demanding *** has evolved many times in birds and we hypothesized that the challenges of this dietary strategy would exert selective pressure on key aspects of metabolic ***,we hypothesized we would find convergent or parallel amino acid substitutions among different nectarivorous lineages in a protein important to sensing,regulating,and transporting glucose,glucose transporter 2(gLUt2).Methods:genetic sequences for gLUt2 were obtained from ten pairs of nectarivorous and non-nectarivorous sister *** performed PCR amplification of the intracellular C-terminal domain of gLUt2 and adjacent protein domains due to the role of this region in determination of transport rate,substrate specificity and ***:Our findings have ruled out the C-terminal regulatory region of gLUt2 as a target for selection by sugar-rich diet among avian nectarivores,though selection among hummingbirds,the oldest avian nectarivores,cannot be ***:Our results indicate future studies should examine down-stream targets of gLUt2-mediated glucosensing and insulin secretion,such as insulin receptors and their targets,as potential sites of selection by nectarivory in birds.

关键词： gLUt2 Nectarivory Avian glucosensing glucose Diet Insulin signalling