搜索到138263篇“ LIVED“的相关文章
Differences in Variations of Long-Lived and Short-Lived Summer Heat Waves during 1981-2020 over Eastern China and Their Corresponding Large-Scale Circulation Anomalies
2024年
Using daily maximum temperature(Tmax)data from 516 observation stations in eastern China from 1981 to 2020,this study employed a relative threshold method to define short-and long-lived heat waves(HWs)by considering regional climate differences to investigate the spatial characteristics and evolution of large-scale circulation during summer HWs.The results demonstrated spatial disparities in the frequency distribution of HWs of different durations and differences in the magnitude of duration and intensity between short-and long-lived HWs.Empirical orthogonal function analysis revealed three dominant spatial modes for both short-and long-lived HWs.The first mode showed that short-lived HWs occur prominently in both northern and southern regions,whereas long-lived HWs mainly occur in the northern region.The second mode was characterized by a meridional dipole pattern in both cases.The third mode exhibited a quadrupole pattern for short-lived HWs and a tripole pattern for long-lived HWs.Differences in the center locations of anomalies in the 500-hPa geopotential height and 850-hPa wind fields significantly influenced the temperature and precipitation anomaly distribution of typical HWs by affecting the warm column in the lower troposphere,cloud distribution,and moisture transport.Moreover,the atmospheric circulation evolution processes of typical HWs associated with the different modes of long-and short-lived HWs were linked to distinct teleconnection patterns.During the three modes of long-lived(short-lived)HWs,there was stronger(weaker)wave flux activity with multiple(single)propagation paths.Stronger westward Atlantic wave train activity at 300 hPa triggered the synergistic action of meridional and zonal wave fluxes,favoring the strengthening and maintenance of positive anomalies in geopotential height of 500 hPa.This may have contributed to the formation of long-lived HWs.These findings provide valuable insights to enhance our understanding and prediction of summer HWs.
Liqun JIHaishan CHEN
Higher levels of the lipophilic antioxidants coenzyme Q_(10) and vitamin E in long-lived termite queens than in short-lived workers
2024年
Termite queens and kings live longer than nonreproductive workers.Several molecular mechanisms contributing to their long lifespan have been investigated;however,the underlying biochemical explanation remains unclear.Coenzyme Q(CoQ),a component of the mitochondrial electron transport chain,plays an essential role in the lipophilic antioxidant defense system.Its beneficial effects on health and longevity have been well studied in several organisms.Herein,we demonstrated that long-lived termite queens have significantly higher levels of the lipophilic antioxidant CoQ_(10) than workers.Liquid chromatography analysis revealed that the levels of the reduced form of CoQ_(10) were 4 fold higher in the queen's body than in the worker's body.In addition,queens showed 7 fold higher levels of vitamin E,which plays a role in antilipid peroxidation along with CoQ,than workers.Furthermore,the oral administration of CoQ_(10) to termites increased the CoQ_(10) redox state in the body and their survival rate under oxidative stress.These findings suggest that CoQ_(10) acts as an efficient lipophilic antioxidant along with vitamin E in long-lived termite queens.This study provides essential biochemical and evolutionary insights into the relationship between CoQ_(10) concentrations and termite lifespan extension.
Eisuke TasakiYorihiro YamamotoYoshihito Iuchi
Long-lived yet bare bubbles in ultrasound
2024年
Bubbles,often seen as metaphors for transience due to their ephemeral nature,have fascinated artists,engineers,and scientists for centuries.Despite centuries of research,new and often surprising bubble physics and applications continue to emerge.In particular,bubble-oriented fluid dynamics has been shown to play an important role in various disciplines such as chemistry,colloidal science,catalysis,electrolysis,medicine,biology,geophysics,and many others.1,2 There has been a strong motivation for researchers to investigate and manipulate the lifetime of bubbles,which could help address important questions related to chemical engineering,food/cosmetics industry,and even geophysics.For instance,the lifetime of bubbles is linked to the stabilization of foams and the size of bubblebursting aerosols.To this end,as the recent discovery of Xiaoliang Ji and coworkers reveals,bubbles suspended in ultrasound could show extraordinary stability without any chemical stabilizers.3 With the bubble lifetime effectively prolonged by approximately two orders of magnitude,their work proposes a new method to produce a longlived bubble.
Jie FengZhengyu Yang
关键词:BUBBLELIFETIME
瓦尔登湖 二、寄居何地,为何目的
2024年
[1]时过境迁,我居住在更接近天下那些我最向往的地方,生活在更接近那些我最向往的历史时代。我的住地就像天文学家在夜间观测到的许多天体一样遥远。我们惯于想象在星系中某个遥远的天国的一角,在仙后星座的背后,有一些罕见的怡人之处,远离喧哗与骚动。我发现,我的房子实际上就位于宇宙间这样一个静的、但却永远新鲜、不染尘垢的地方。
亨利·戴维·梭罗孙致礼(译)
重要的种子储存物质长寿命mRNA
2024年
高等植物通常从种子萌发开始,经过营养生长和生殖发育后重新形成种子,由此完成世代更迭。种子中积累的碳水化合物、脂质、蛋白质及mRNA等大分子物质对于维持其发芽潜力至关重要,其中部分mRNA可长期保存而不被降解,被称为长寿命mRNA (即long-lived mRNA)。在水稻(Oryza sativa)中,与萌发相关的long-lived mRNA在花后10–20天开始转录积累,花后20天至种子完全成熟期间,一些与休眠和胁迫响应相关的long-livedmRNA转录并保存在细胞中。Long-lived mRNA种类繁多,主要包括蛋白质合成类mRNA、能量代谢类mRNA、细胞骨架类mRNA及逆境响应相关的mRNA,如小热激蛋白和LEA家族蛋白。Long-livedmRNA的转录组分析表明,很多基因的启动子区域都包含脱落酸(ABA)或赤霉素(GA)相关的顺式作用元件,拟南芥(Arabidopsisthaliana)atabi5突变体种子中约有500个不同于野生型的差异表达long-lived mRNA,暗示ABA和GA是影响long-livedmRNA种类的关键激素。Long-livedmRNA通常与单核糖体和RBP蛋白交联在一起,以PBs (P-bodies)形式存在于细胞中,保护mRNA不被降解。与种子休眠相关的long-lived mRNA在种子后熟过程中逐渐被降解,而且一些特定long-lived mRNA的氧化修饰是种子打破休眠的一种生物现象。在种子长期贮藏过程中, long-lived mRNA的随机降解直接关系到种子的寿命和活力,保留下来的mRNA在种子吸胀初期被翻译成蛋白质,促进种子在吸胀早期快速萌发。该文综述了种子重要储存物质long-livedmRNA的特征和功能,并提出了本领域需要进一步研究的科学问题,以期为深入理解种子休眠、萌发与寿命的分子机制提供参考。
朱晓博董张祝梦瑾胡晋林程陈敏关亚静
关键词:种子休眠种子萌发种子贮藏
神经胶质瘤患者患病体验及需求的质性研究
2024年
目的深入探究神经胶质瘤患者的患病体验,了解患者患病经历及照护需求,为帮助患者接受疾病并提供针对性护理干预提供依据。方法采用描述性质性研究,按照目的抽样法,于2022年6月至2023年4月选取河南省人民医院的12例神经胶质瘤患者(男7例,女5例,年龄31~69岁)进行半结构式访谈,并以Colaizzi 7步分析法归纳和提炼主题。结果将患病体验及需求提炼为5个主题:获得相关健康教育需求迫切,健康教育内容(治疗措施、复发知识、术后康复内容、益于健康的行为和日常生活方式、术后回归工作时间及强度),偏向“互联网+”的随访模式,渴望专业、延续的治疗及随访服务,重视家庭或照护者的支持。结论神经胶质瘤患者由于疾病认知水平不同、医疗条件差异、社会支持不足等原因,患病经历及需求呈多样化趋势。医护人员应加强该人群的健康教育,提升疾病认知水平,强化家庭支持,构建“互联网+”医疗平台,促进专业、个性化、精准的治疗及随访体系构建。
张桐高敏李翔孟晓静周立民范晶丽梅洁
关键词:神经胶质瘤
古尔班通古特沙漠短命植物对鼠类扰动的响应
2024年
短命植物是维持古尔班通古特沙漠-绿洲交错带稳定性的重要植被,鼠类扰动在多方面影响短命植物的生长。以古尔班通古特沙漠南缘短命植物为研究对象,在该区域有、无鼠类扰动的情况下,对短命植物生长状况、多样性以及土壤理化性质进行了分析。结果表明:(1)鼠类扰动改变了短命植物的性状,扰动区的短命植物密度显著高于对照区,株高显著低于对照区。(2)鼠类扰动增加了短命植物的Shannon-Wiener多样性指数和Margalef丰富度指数。(3)鼠类扰动使土壤全磷、全氮、全钾、速效氮、速效磷和总盐含量存在极显著差异。(4)对照区短命植物多样性与土壤理化因子有显著的相关性,扰动区两者之间的相关性不显著。土壤理化因子可以很好地解释短命植物多样性的变化,在对照区和扰动区对短命植物多样性的累计解释率分别为97.99%和86.84%。古尔班通古特沙漠适度的鼠类扰动在局域生境中会显著改变土壤理化特性,从而显著提高短命植物的多样性,对提高荒漠干旱性区域的生态稳定性具有重要意义。
石盼洋陈宏伟董建瑞赵文勤李榕
关键词:短命植物
人类健康增龄的发生机制——来自长寿人群的研究证据
2024年
全球人口老龄化对改善老年人健康和预防老年疾病提出了新挑战和新要求。长寿人群,由于其寿命长且一定程度上延缓了罹患疾病过程,甚至规避了一些重大老年疾病风险,成为研究人类健康增龄的绝佳自然模型。通过系统研究长寿人群,揭示其潜在的健康增龄保护机制和相关调控因子,对于研发延缓衰老和预防增龄相关疾病的手段具有重要的指导意义。本综述介绍了长寿人群的研究价值,并概述了近年来基于长寿人群的研究在揭示健康增龄生物学基础方面取得的进展,特别是多组学技术在识别长寿相关基因和分子途径中的应用。此外,讨论了该领域未来研究的方向,包括纵向追踪研究、多组学数据整合等方面,旨在为延长人类寿命和提高老年人生活质量提供新的科学依据。
肖富辉孔庆鹏
关键词:长寿人群老年疾病
摹仿:再现西方和非西方之世界的文学中活的现实
2024年
埃里希·奥尔巴赫的《摹仿:西方文学中的现实再现》无疑是研究现实主义领域中长期以来最有影响力的出版物之一。在他逃离纳粹德国期间所著的这部书中,奥尔巴赫以跨历史的方式展开群岛式的写作,从希腊罗马古典时代到中世纪再到二十世纪,对“摹仿”概念进行了一系列的研究。他区分了西方文学中两种不同的现实再现形式,我们可以称之为大陆式和群岛式。本文旨在研究西方及非西方文学中两种书写现实的模式,聚焦于从18世纪到当今,特别是在无固定栖所的文学作品中所呈现的活的现实。当我们讨论现实主义时,关于生活和活的现实,认识论上发生了哪些变化与转化呢?
奥特马尔·埃特
关键词:摹仿《红楼梦》残雪
老龄社会和长寿社会下我国老龄产业发展思考
2024年
随着我国进入老龄社会和长寿社会,需求结构也在快速发生变化。为了适应新需求结构,老龄产业逐渐发展起来。大力发展老龄产业可以为经济发展带来巨大的潜在红利,如提供大量的就业岗位,广阔的投资空间,大量的财政税收,以及减轻经济周期带来的振荡。发展老龄产业,我国具有不可多得的有利条件,如庞大的老年人口提供了坚实的需求基础,丰富的劳动力资源提供了良好的生产条件,悠久的传统文化提供了强大的助力,等等。同时也存在不利因素,如对老龄产业的本质和重大红利认识不到位,老龄产业政策体系尚不健全,老龄产业有效需求亟待提高,等等。对此,需要加快出台老龄产业中长期发展规划,释放中老年人消费潜力,完善老龄产业政策,实施老龄产业重大计划。
杨晓奇党俊武和明杰
关键词:老龄社会红利

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高素菊
作品数:72被引量:5H指数:1
供职机构:内蒙古师范大学
研究主题:AGAIN 职教中心 英语 幽默 英文
刘新会
作品数:85被引量:2H指数:1
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李也白
作品数:103被引量:10H指数:2
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龚平
作品数:4被引量:0H指数:0
供职机构:宁波大学
研究主题:译文 LIVED HAVE WHAT 翻译实践
雷国红
作品数:7被引量:1H指数:1
供职机构:湖南文理学院
研究主题:课堂 视听说 LIVED HAVE THREE