检索结果-南通市图书馆

Adaptive strategies of high and low nucleic acid prokaryotes in response to declining resource availability and selective grazing by protozoa

引用

Science China Earth Sciences 2024年第6期67卷 1872-1884页

作者： Chen HU Liuqian YU Xiaowei CHEN Jihua LIU Yao ZHANG John BATT Xilin XIAO Qiang SHI Rui ZHANG tingwei luo Nianzhi JIAO Dapeng XU College of the Environment and Ecology Xiamen UniversityXiamen 361102China State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesFujian Key Laboratory of Marine Carbon SequestrationXiamen UniversityXiamen 361102China Joint Lab for Ocean Research and Education(LORE)of Dalhousie University Canadaand Shandong University and Xiamen UniversityXiamen 361102China Earth Ocean and Atmospheric Sciences ThrustThe Hong Kong University of Science and Technology(Guangzhou)Guangzhou 510000China Institute of Marine Science and Technology Shandong UniversityQingdao 266237China Department of Oceanography Dalhousie UniversityHalifaxNova Scotia B3H 4R2Canada Institute for Advanced Study Shenzhen UniversityShenzhen 518060China Carbon Neutral Innovation Research Center Xiamen UniversityXiamen 361102China

Prokaryotes play a fundamental role in global ocean biogeochemical ***,how the abundance and metabolic activity of ecologically distinct subgroups(i.e.,high nucleic acid(HNA)and low nucleic acid(LNA)cells),and their regulating factors,change in response to changing marine environmental conditions remains poorly ***,we delved into the time-evolving dynamic responses of the HNA and LNA prokaryotic subgroups to declining resource availability and selective grazing by protozoa by conducting a 73-day incubation experiment in a large-volume(117,000 L)macrocosm that facilitates community-level *** found that the metabolic activity of the HNA subgroup was higher than that of the LNA subgroup when the macrocosm was resource replete but that the HNA subgroup declined more rapidly than the LNA subgroup as the resources became increasingly scarce,leading to a steadily increasing contribution of LNA cells to prokaryotic ***,as resources in the macrocosm became limited,protozoan grazing preference shifted from the HNA to the LNA subgroup and the contributions of the LNA subgroup to the carbon flow within the macrocosm *** findings highlight the resilience of LNA cells in resource-limited environments,illuminate the critical role of selective grazing by protozoa in balancing distinct prokaryotic subgroups under changing resource conditions,and demonstrate the complex and adaptive interactions between protozoa and prokaryotes across diverse environmental contexts.

关键词： Microbial loop Macrocosm experiment Prokaryote Top-down and bottom-up controls Carbon flow

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Virus-Host Interactions Drive Contrasting Bacterial Diel Dynamics in the Ocean

引用

Research 2024年第2期6卷 389-399页

作者： Xiaowei Chen Chen Hu Wei Wei Yunlan Yang Markus G.Weinbauer Hongbo Li Shiying Ren Ruije Ma YVibin Huang tingwei luo Nianzhi Jiao Rui Zhang State Key Laboratory of Marine Environmental Science College of Ocean and Earth SciencesFujian Key Laboratory of Marine Carbon SequestrationXiamen UniversityXiamen 361102PR China College of the Environment and Ecology Xiamen UniversityXiamen 361102PR China Research Center for Environmental Ecology and Engineering School of Environmental Ecology and Biological EngineeringWuhan Institute of TechnologyWuhan 430205PR China Sorbonne Universités UPMCUniversitéParis 06CNRSLaboratoire d'Oceanographie de Villefranche(LOV)Villefranche-sur-Mer 06230France National Marine Environmental Monitoring Center Ministry of Ecological EnvironmentDalian 116023PR China Department of Ocean Sciences University of CaliforniaSanta CruzCAUSA NOAA/OAR Pacific Marine Environmental Laboratory SeattleWAUSA Institute for Advanced Study Shenzhen UniversityShenzhen 518055PR China

Marine organisms perform a sea of diel *** diel dynamics have been shown to be driven by light,energy resources,circadian rhythms,and the coordinated coupling of photoautotrophs and heterotrophic ***,we explore the diel fluctuation of viral production and decay and their impact on the total and active bacterial community in the coastal and open seawaters of the South China *** results showed that the night-production diel pattern of lytic viral production was concurrent with the lower viral decay at night,contributing to the accumulation of the viral population size during the night for surface *** diel variations in bacterial activity,community composition,and diversity were found highly affected by viral *** was revealed by the finding that bacterial community diversity was positively correlated to lytic viral production in the euphotic zone of the open ocean but was negatively related to lysogenic viral production in the coastal *** distinct but contrasting correlations suggest that viral life strategies can not only contribute to diversifying bacterial community but also potentially piggyback their host to dominate bacterial community,suggesting the tightly synchronized depth-dependent and habitat-specific diel patterns of virus-host *** further implies that viruses serve as an ecologically important driver of bacterial diel dynamics across the ocean,highlighting the viral roles in bacterial ecological and biogeochemical processes in the ocean.

关键词： coastal ocean Marine

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

代际流动何以推动城市创新

引用

世界经济 2024年第8期47卷 67-94页

作者：谢佳松林建浩罗挺威东北财经大学经济学院中山大学岭南学院广东省510275

代际流动是影响经济活动的重要社会环境因素,其水平高低代表了一个地区社会公平尤其是机会公平程度。本文基于全国1%人口抽样调查数据构造城市层级的代际流动性指标,探究其对城市-行业创新的影响及其作用机制。研究发现,代际流动性显著... 详细信息

代际流动是影响经济活动的重要社会环境因素,其水平高低代表了一个地区社会公平尤其是机会公平程度。本文基于全国1%人口抽样调查数据构造城市层级的代际流动性指标,探究其对城市-行业创新的影响及其作用机制。研究发现,代际流动性显著促进了创新产出,这一结论在一系列稳健性检验和内生性讨论后仍然存在。基于地区历史上距离印刷品原材料的河流距离这一外生地理特征,本文验证了代际流动对创新的因果影响。在机制检验中,一方面,高代际流动性能够吸引高技能劳动力迁入,继而优化劳动力结构;另一方面,高代际流动性意味着更加开放的机会结构,鼓励个体竞争和冒险,从而释放企业家精神以推动创新。本文结论表明,代际流动性不仅事关阶层固化和社会稳定,更是影响创新的重要因素。围绕创新推动改革,需要将提升代际流动性纳入促进创新的政策体系之中。

关键词：代际流动创新劳动力结构企业家精神

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microbial community structure in major habitats above 6000 m on Mount Everest

引用

Chinese Science Bulletin 2007年第17期52卷 2350-2357页

作者： LIU YongQin YAO TanDong KANG ShiChang JIAO NianZhi ZENG YongHui HUANG SiJun luo tingwei Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China State Key Laboratory of Cryospheric Science Chinese Academy of Sciences Lanzhou 730000 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Bacterial abundance in surface snow between 6600 and 8000 m a.s.l. on the northern slope of Mt. Ev- erest was investigated by flow cytometry. Bacterial diversity in serac ice at 6000 m a.s.l., glacier melt- water at 6350 m, and surface snow at 6600 m a.s.l. was examined by constructing a 16S rRNA gene clone library. Bacterial abundance in snow was higher than that in the Antarctic but similar to other mountain regions in the world. Bacterial abundance in surface snow increased with altitude but showed no correlation with chemical parameters. Bacteria in the cryosphere on Mt. Everest were closely related to those isolated from soil, aquatic environments, plants, animals, humans and other frozen environ- ments. Bacterial community structures in major habitats above 6000 m were variable. The Cyto- phaga-Flavobacterium-Bacteroides (CFB) group absolutely dominated in glacial meltwater, while β-Proteobacteria and the CFB group dominated in serac ice, and β-Proteobacteria and Actinobacteria dominated in surface snow. The remarkable differences among the habitats were most likely due to the bacterial post-deposition changes during acclimation processes.

关键词：微生物群体结构珠穆朗玛峰 16S rRNA 生物量

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Seasonal variation of snow microbial community structure in the East Rongbuk glacier, Mt. Everest

引用

Chinese Science Bulletin 2006年第12期51卷 1476-1486页

作者： LIU Yongqin YAO Tandong KANG Shichang JIAO Nianzhi ZENG Yonghui SHI Yang luo tingwei JING Zhefang HUANG Shijun Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Key Laboratory of Cryosphere and Environment Chinese Academy of Sciences Lanzhou 730000 China National Key Laboratory for Marine Environmental Sciences Xiamen University Xiamen 361005 China

The bacterial diversity and abundance in the snow of East Rongbuk glacier, Mt. Everest were examined through 16S rRNA gene clone library and flow cytometry approaches. In total, 35 16S rRNA gene sequences were obtained, which belong to α, β, γ-Proteobacteria, Actinobacteria, Firmicutes, CFB, Cyanobacteria, Eukaryotic chloroplast, and TM7 candidate phylum respectively. γ-Proteobacteria was the dominant bacterial group in this region, while the genera Acinetobacter and Leclercia were domi- nant on the genus level. The community structure varied seasonally. The bacterial abundance in sum- mer snow was higher than that in winter. Moreover, the snow bacterial community structures in both seasons were diverse, with not only common species but season-specific species. The common species most likely originated from the Tibet Plateau. Bacteria in summer snow are affiliated with marine environ- ment, whereas bacteria in winter snow are closely related to more diverse environments and show the feature of resistance to cold. Seasonal variations of abundance and bacterial diversity were most proba- bly due to the seasonal characteristics of climate and atmospheric circulation in Mt. Everest.

关键词：珠穆朗玛峰冰川细菌多样性季节变异微生物

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

手-臂双侧强化训练联合中医手法推拿对偏瘫型脑性瘫痪儿童上肢功能的影响

引用

中国中西医结合儿科学 2024年第4期16卷 281-286页

作者：梁鲁波何强勇李佩琼朱星明罗廷威蒙智扬佛山市第一人民医院中西医结合科广东佛山528000 佛山市第一人民医院功能神经科广东佛山528000 佛山市南海区妇幼保健院儿童康复科广东佛山528200

目的研究中医手法推拿结合手-臂双侧强化训练对偏瘫型脑性瘫痪(简称脑瘫)儿童的疗效。方法选取2021年1月至2023年6月佛山市第一人民医院收治的偏瘫型脑瘫患儿62例为研究对象,随机分为对照组30例和观察组32例。对照组进行手-臂双侧强化训... 详细信息

目的研究中医手法推拿结合手-臂双侧强化训练对偏瘫型脑性瘫痪(简称脑瘫)儿童的疗效。方法选取2021年1月至2023年6月佛山市第一人民医院收治的偏瘫型脑瘫患儿62例为研究对象,随机分为对照组30例和观察组32例。对照组进行手-臂双侧强化训练,观察组在对照组治疗基础上结合中医手法推拿,两组均治疗8周。训练前后对两组儿童分别进行上肢功能技巧测试质量(QUEST)量表和能力低下儿童评定量表(PEDI)进行测评,并对测评结果进行数据分析,比较两组数据的差异性。结果(1)QUEST量表评分显示,治疗后观察组分离运动区、负重区和总分均优于对照组,差异有统计学意义(P<0.05)。(2)PEDI评分显示,治疗后功能性技能区和照顾者协助区的自理能力、移动能力和社会技能组内前后比较,差异均有统计学意义(P<0.05)。治疗后观察组功能性技能区的自理能力和移动能力,照顾者协助区的自理能力均优于对照组,差异有统计学意义(P<0.05)。结论手-臂双侧强化训练联合中医手法推拿对偏瘫型脑瘫儿童上肢功能的改善优于单独使用手-臂双侧强化训练。

关键词：脑性瘫痪偏瘫型手-臂双侧强化训练上肢功能儿童

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

自尊在晚期肺癌化疗病人领悟社会支持和经验性回避间的中介效应

引用

全科护理 2024年第11期22卷 1987-1991页

作者：张智强张娜罗听薇向玉琼蒋思珊朱丽辉湖南中医药大学护理学院 410208 湖南省肿瘤医院 410013

目的:探讨自尊在晚期肺癌化疗病人领悟社会支持和经验性回避间的中介效应。方法:采用便利抽样法,选取2023年6月—8月湖南省某肿瘤医院的392例晚期肺癌化疗病人,采用一般资料调查表、领悟社会支持量表、自尊量表和接纳与行动问卷第二版... 详细信息

目的:探讨自尊在晚期肺癌化疗病人领悟社会支持和经验性回避间的中介效应。方法:采用便利抽样法,选取2023年6月—8月湖南省某肿瘤医院的392例晚期肺癌化疗病人,采用一般资料调查表、领悟社会支持量表、自尊量表和接纳与行动问卷第二版对病人进行调查。结果:晚期肺癌化疗病人经验性回避得分为(26.28±8.53)分,与领悟社会支持(r=-0.524,P<0.001)、自尊(r=-0.505,P<0.001)呈负相关;自尊在领悟社会支持与经验性回避间起部分中介作用[间接效应系数为-0.136,95%CI(-0.362,-0.182)],中介效应占比22.44%。结论:领悟社会支持可负向预测肺癌化疗病人经验性回避,自尊在其中起部分中介作用。建议医务工作者可以通过增强病人的领悟社会支持状况,提高病人的自尊水平,以减少晚期肺癌病人的经验性回避程度。

关键词：自尊晚期肺癌化疗病人领悟社会支持经验性回避中介效应

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

临终癌症患者安宁疗护中营养管理的循证证据总结

引用

医学临床研究 2024年第4期41卷 484-488页

作者：向玉琼罗听薇宋青青张娜蒋思珊张智强朱丽辉湖南中医药大学护理学院湖南长沙410208 湖南省儿童医院心血管内科湖南长沙410007 湖南省肿瘤医院护理部湖南长沙410031

【目的】检索并评价国内外关于临终癌症患者安宁疗护中营养管理的相关证据,为临床工作者提供循证依据。【方法】根据证据资源“6S”模型进行文献检索,检索时间为建库至2022年12月,由2名研究员对纳入文献进行质量评价及证据提取。【结果... 详细信息

【目的】检索并评价国内外关于临终癌症患者安宁疗护中营养管理的相关证据,为临床工作者提供循证依据。【方法】根据证据资源“6S”模型进行文献检索,检索时间为建库至2022年12月,由2名研究员对纳入文献进行质量评价及证据提取。【结果】共纳入13篇文献,提取28条循证证据,其中A级推荐24条,B级推荐4条。构建营养支持团队是临终癌症患者营养管理的坚实基础,提供药物干预与非药物干预是临终癌症患者营养管理的关键环节,采取肠内、肠外营养是临终癌症患者营养管理的补充手段。【结论】临床工作人员可参考临终癌症患者安宁疗护中营养管理的循证证据,并充分考虑患者及家属的个人意愿,为患者制定个性化的营养支持方案。

关键词：肿瘤/外科学临终关怀医疗循证医学

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于Web of Science数据库的新生儿安宁疗护的可视化分析

引用

中华现代护理杂志 2024年第4期30卷 487-494页

作者：蒋思珊罗听薇张娜向玉琼夏青青张智强朱丽辉湖南中医药大学护理学院长沙410208 湖南省肿瘤医院院办长沙410013

目的基于Web of Science数据库, 对新生儿安宁疗护进行可视化分析, 探讨研究热点与前沿, 为我国新生儿安宁疗护的发展提供参考。方法检索并筛选1991—2023年Web of Science核心合集收录的与新生儿安宁疗护相关的文献, 采用CiteSpace 6.1... 详细信息

目的基于Web of Science数据库, 对新生儿安宁疗护进行可视化分析, 探讨研究热点与前沿, 为我国新生儿安宁疗护的发展提供参考。方法检索并筛选1991—2023年Web of Science核心合集收录的与新生儿安宁疗护相关的文献, 采用CiteSpace 6.1.R6软件从作者、国家/地区、机构、期刊共被引频次、关键词知识图谱等方面进行可视化分析。结果共纳入文献1 452篇, 发文量整体呈上升趋势, 美国、英国、加拿大占据新生儿安宁疗护相关研究的核心地位。研究热点包括不同阶段和不同疾病种类的安宁疗护、新生儿重症监护病房安宁疗护的关键环节、新生儿安宁疗护服务模式的创新、家属和医护人员的需求及心理支持策略。研究前沿集中在医护人员在安宁疗护中的作用和挑战、疾病诊断、与决策制定相关的道德困扰。结论我国可借鉴国际研究热点及前沿探索不同安宁疗护服务模式的可适性, 丰富研究类型, 加强法律政策层面的引领, 完善教育培训系统, 构建符合我国国情和文化的新生儿安宁疗护服务体系。

关键词：新生儿安宁疗护可视化分析文献计量学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Carbon pools and fluxes in the China Seas and adjacent oceans

引用

Science China Earth Sciences 2018年第11期61卷 1535-1563页

作者： Nianzhi JIAO Yantao LIANG Yongyu ZHANG Jihua LIU Yao ZHANG Rui ZHANG Meixun ZHAO Minhan DAI Weidong ZHAI Kunshan GAO Jinming SONG Dongliang YUAN Chao LI Guanghui LIN Xiaoping HUANG Hongqiang YAN Limin HU Zenghu ZHANG Long WANG Chunjie CAO Yawei luo tingwei luo Nannan WANG Hongyue DANG Dongxiao WANG Si ZHANG State Key Laboratory of Marine Environmental Science Xiamen University Key Laboratory of Biofuels Shandong Provincial Key Laboratory of Energy Genetics Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Institute of Marine Science and Technology Shandong University Key Laboratory of Marine Chemistry Theory and Technology (Ocean University of China) Ministry of Education/Qingdao Collaborative Innovation Center of Marine Science and Technology Institute of Oceanology Chinese Academy of Sciences State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System ScienceTsinghua University South China Sea Institute of Oceanology Chinese Academy of Sciences Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyState Oceanic Administration

The China Seas include the South China Sea, East China Sea, Yellow Sea, and Bohai Sea. Located off the Northwestern Pacific margin, covering 4700000 km^2 from tropical to northern temperate zones, and including a variety of continental margins/basins and depths, the China Seas provide typical cases for carbon budget studies. The South China Sea being a deep basin and part of the Western Pacific Warm Pool is characterized by oceanic features; the East China Sea with a wide continental shelf, enormous terrestrial discharges and open margins to the West Pacific, is featured by strong cross-shelf materials transport; the Yellow Sea is featured by the confluence of cold and warm waters; and the Bohai Sea is a shallow semiclosed gulf with strong impacts of human activities. Three large rivers, the Yangtze River, Yellow River, and Pearl River, flow into the East China Sea, the Bohai Sea, and the South China Sea, respectively. The Kuroshio Current at the outer margin of the Chinese continental shelf is one of the two major western boundary currents of the world oceans and its strength and position directly affect the regional climate of China. These characteristics make the China Seas a typical case of marginal seas to study carbon storage and fluxes. This paper systematically analyzes the literature data on the carbon pools and fluxes of the Bohai Sea,Yellow Sea, East China Sea, and South China Sea, including different interfaces(land-sea, sea-air, sediment-water, and marginal sea-open ocean) and different ecosystems(mangroves, wetland, seagrass beds, macroalgae mariculture, coral reefs, euphotic zones, and water column). Among the four seas, the Bohai Sea and South China Sea are acting as CO_2 sources, releasing about0.22 and 13.86–33.60 Tg C yr^(-1) into the atmosphere, respectively, whereas the Yellow Sea and East China Sea are acting as carbon sinks, absorbing about 1.15 and 6.92–23.30 Tg C yr^(-1) of atmospheric CO_2, respectively. Overall, if only the CO_2 exchange a

关键词： China Seas "Source" or "sink" of C02 Carbon pool Carbon flux Biological pump Microbial carbon pump

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：