检索结果-南通市图书馆

Influence of environmental enrichment on hippocampal synapses in adolescent offspring of mothers exposed to prenatal stress

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2011年第5期6卷 378-382页

作者： Yaojin Peng Xiaohong Jian lihua liu Jianbin Tong Deliang Lei Department of Human Anatomy Medical College of Hunan Normal University Changsha 410006 Hunan Province China Department of Basic Nursing Medical College of Hunan Normal University Changsha 410006 Hunan Province China Department of Human Anatomy and Neurobiology Xiangya School of Medicine Central South University Changsha 410013 Hunan Province China

Environmental enrichment attenuates hippocampal synaptic injury induced by prenatal stress in offspring. However, the influence of hippocampal synaptic changes and regional differences in prenatal stress remains poorly understood. The present study induced stress in Sprague Dawley rats, which were at gestational age 13-19 days. Following weaning, the offspring were raised in an enriched environment to establish models of stress ＋ enriched environment. Dendritic spine density and synaptophysin expression were detected in hippocampal neurons using Golgi staining and western blot analysis, respectively. Results showed that enriched environment increased dendritic spine density of apical dendrites in CA1 pyramidal cells and basal dendrites of granular cells in the outer layer of the dentate gyrus. In addition, hippocampal synaptophysin expression increased and the effects of prenatal stress on neuronal dendritic spines were reversed in adolescence.

关键词： dendritic spine enriched environment hippocampus offspring prenatal stress synaptophysin neural regeneration

在线全文

学校读者我要写书评

暂无评论

基于语料库的中国扶贫国外报道话语研究

山东外语教学 2024年第2期45卷 22-34页

作者：张丹田路晗刘立华北京大学新闻与传播学院北京100091 北京航空航天大学外国语学院北京100191

中国脱贫攻坚事业一直受到国外媒体的广泛关注。本研究选取NOW(News on the Web)网络新闻语料库中2011年12月至2022年1月共91篇国外有关中国扶贫报道话语的语料,以Fairclough三维分析模型为理论框架,从文本、话语实践和社会实践三个层... 详细信息

中国脱贫攻坚事业一直受到国外媒体的广泛关注。本研究选取NOW(News on the Web)网络新闻语料库中2011年12月至2022年1月共91篇国外有关中国扶贫报道话语的语料,以Fairclough三维分析模型为理论框架,从文本、话语实践和社会实践三个层面详细论述欧美西方国家、非洲国家以及南亚、东南亚国家相关新闻报道的不同焦点和背后的意识形态呈现模式。研究发现,在有关脱贫攻坚的报道中,西方媒体偏重于中国政治主题,非洲媒体更多赞扬中国扶贫成就、国际合作和经验分享,而东南亚媒体侧重扶贫在农业及经济方面的进展。通过考察不同国家和地区对中国减贫治理的认知态度,以期为中国扶贫话语体系建构提供借鉴,实现对外话语的精准化和差异化传播。

关键词：中国扶贫实践批评话语分析 Fairclough三维分析模型 NOW语料库

Effects of initial soil moisture content on soil water and nitrogen transport under muddy water film hole infiltration

在线全文

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2021年第4期14卷 182-189页

作者： lihua liu Liangjun Fei Lin Chen Kun Hao Quanju Zhang State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi’an University of TechnologyXi’an 710048China Institute of Water Resources and Hydro-electric Engineering Xi’an University of TechnologyXi’an 710048China

Film hole irrigation has been widely adopted as an effective water-saving irrigation technology in the arid and semiarid areas of China.To investigate the effects of initial soil moisture content(θ0)on soil water and nitrogen transport characteristics under muddy water film hole infiltration,the laboratory experiments were conducted with muddy water film hole infiltration,using five initial soil moisture content treatments.The models for describing the relationships between the cumulative infiltration(I(t))and infiltration duration(t);the relationship among the horizontal and vertical migration distances of the wetting front(Fx,Fz),θ0 and t,were established.The results showed that the initial soil moisture content had a significant effect on I(t),Fx,Fz and moisture content distribution in the wetted body.The change of I(t)over t conformed to Kostiakov model.With the increase ofθ0,the infiltration coefficient(K)gradually decreased.NO-3-N was mainly distributed in the range of the wetting radius of 15 cm,while NH+4-N was mainly distributed in the range of the wetting radius of 8 cm.This study can provide a theoretical basis and technical support for film hole irrigation.

关键词： film hole irrigation muddy water initial soil moisture content water and nitrogen transport water redistribution

Sedimentary geochemical proxies for methane seepage at Site C14 in the Qiongdongnan Basin in the northern South China Sea

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

Acta Oceanologica Sinica 2019年第7期38卷 84-95页

作者： Tiantian Sun Daidai Wu Fei Yang lihua liu Xuegang Chen Ying Ye Ocean College of Zhejiang University Zhoushan 316021China Key Laboratory of Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China Evaluation and Detection Technology Laboratory of Marine Mineral Resources Pilot National Laboratory for Marine Sciences and Technology(Qingdao)Qingdao 266071China

Recent studies have shown that specific geochemical characteristics of sediments can be used to reconstruct past methane seepage events.In this work,the correlation between the Sr/Ca and Mg/Ca ratios of sediment samples is analyzed and the sulfate concentration profile in Site C14 from cold-seep sediments in the Qiongdongnan Basin in northern South China Sea is obtained.The results confirmed that,sulfate at 0–247 cm below sea floor(Unit I)is mainly consumed by organic matter sulfate reduction(OSR),while sulfate at 247–655 cm(UnitⅡ)is consumed by both the OSR and the anaerobic oxidation of methane(AOM).In addition,the bottom sediment layer is affected by weak methane seepage.The Mo and U enrichment factors also exhibit similar trends in their respective depth profiles.The responses of trace elements,including Co/Al,Ni/Al,Cr/Al and Zn/Al ratios to methane seepage allowed the study of depositional conditions and methane seepage events.Based on the results,it is speculated that the depositional conditions of UnitⅡchanged with depth from moderate conditions of sulfidic and oxic conditions to locally anoxic conditions,and finally to suboxic conditions due to methane fluid leakage.The stable isotope values of chromium-reducible sulfide produced by AOM and those of sulfide formed by OSR in the early diagenetic environment suffered serious depletion of 34S.This was probably due to weak methane leakage,which caused the slower upward diffusion and the effect of early diagenesis on the samples.It is necessary to consider the effects of depositional environments and diagenesis on these geochemical parameters.

关键词： Qiongdongnan Basin trace elements stable isotope values anaerobic oxidation of methane methane activity

大数据背景下医院数据资源分类框架与数据标准化分析

在线全文

学校读者我要写书评

暂无评论

中华医院管理杂志 2024年第3期40卷 165-171页

作者：吴琼刘月辉刘建超王文青刘丽华解放军医学院北京100853 解放军总医院创新研究部医院管理研究所北京100853 中国医学科学院医学信息研究所 100020

医院数据资源是医院的重要资产之一,将分散在不同信息系统的数据进行整合归类和标准化处理,能满足大数据背景下急剧增加的多样化数据应用需求。医院数据资源发展历程经历了从纸质记录到信息化数据收集阶段,再到操作型数据仓储和数据应... 详细信息

医院数据资源是医院的重要资产之一,将分散在不同信息系统的数据进行整合归类和标准化处理,能满足大数据背景下急剧增加的多样化数据应用需求。医院数据资源发展历程经历了从纸质记录到信息化数据收集阶段,再到操作型数据仓储和数据应用阶段,对医学发展起到十分重要的作用。近年来,一些发达国家通过明确数据应用目标,建立了数据资源分类框架体系,对医院数据资源实施统一分类管理和数据标准化处理,在辅助临床决策、推动科学研究和实施精细化医院管理等方面取得良好应用成效,如英国医院病例统计、澳大利亚国家卫生信息模型、美国医疗服务效果数据及信息收集系统及医疗保健成本和利用项目。目前,我国发布了一系列卫生信息相关政策文件和规范标准,加大对医院信息化建设的支持力度,推动了数据分类管理和标准化建设。但是,我国尚未建立健全统一的医院数据资源分类管理体系,且存在数据异构化问题,影响了医院数据资源的充分应用。本研究建议,可借鉴国际经验,立足数据应用需求,建立统一的医院数据资源分类框架体系;基于数据集标准,推动医院数据标准化建设,提高数据应用效率,促进数据价值释放。

关键词：数据资源管理医院大数据数据分类框架数据集标准化

在线全文

学校读者我要写书评

暂无评论

含氰化氢炭化废气处理工艺研究

石油化工技术与经济 2024年第2期40卷 30-32页

作者：刘礼华中国石化上海石油化工股份有限公司上海200540

使用三区直燃式焚烧炉处理碳纤维生产过程中的炭化废气,并探讨了还原区温度、氧化区温度、炉膛压力等工艺参数对HCN处理效率的影响。研究结果表明:提高还原区、氧化区温度,控制炉膛压力有助于提高HCN的处理效率,控制较低的氧体积分数可... 详细信息

使用三区直燃式焚烧炉处理碳纤维生产过程中的炭化废气,并探讨了还原区温度、氧化区温度、炉膛压力等工艺参数对HCN处理效率的影响。研究结果表明:提高还原区、氧化区温度,控制炉膛压力有助于提高HCN的处理效率,控制较低的氧体积分数可以抑制NO x生成,炭化废气经三区直燃式焚烧炉处理后,HCN的质量浓度小于1.9 mg/m 3,达到《大气污染物综合排放标准》(DB 31/993—2015)的要求。

关键词：碳纤维炭化尾气氰化氢

维普期刊数据库博看期刊

农产品质量安全检测机构内部审核不符合项分析与讨论

在线全文

学校读者我要写书评

暂无评论

农产品质量与安全 2024年第4期 51-54页

作者：刘丽华福建省农产品质量安全检验检测中心福州350003

农产品质量安全检测机构内部审核是确保检测机构质量管理体系有效运行的重要手段,对响应国家政策要求,确保检测活动合法合规;提升检测质量与效率,保障公众饮食安全;增强检测机构公信力,促进检测行业健康发展具有重要意义。本文以某农产... 详细信息

农产品质量安全检测机构内部审核是确保检测机构质量管理体系有效运行的重要手段,对响应国家政策要求,确保检测活动合法合规;提升检测质量与效率,保障公众饮食安全;增强检测机构公信力,促进检测行业健康发展具有重要意义。本文以某农产品质量安全检测机构近5年内部审核发现的不符合项为例进行分析和讨论,针对农产品质量安全检测机构内部审核发现的常见问题,提出改进和加强农产品质量安全检测机构内部审核工作的对策建议,为农产品质量安全检测机构的持续改进和规范化管理提供参考。

关键词：农产品质量安全检测机构内部审核

在线全文

学校读者我要写书评

暂无评论

桂林山水文化在插画设计中的应用策略

鞋类工艺与设计 2024年第3期4卷 185-187页

作者：刘丽华南宁理工学院艺术与传媒学院广西南宁530100

桂林山水是中国十大风景名胜之一,本文以桂林山水文化为研究对象,分析桂林山水文化在插画设计中的应用可行性以及山水观光、民俗风情、历史文化等文化元素,提出将桂林山水文化应用到现代插画设计中的思路,并通过案例讲解如何将桂林山水... 详细信息

桂林山水是中国十大风景名胜之一,本文以桂林山水文化为研究对象,分析桂林山水文化在插画设计中的应用可行性以及山水观光、民俗风情、历史文化等文化元素,提出将桂林山水文化应用到现代插画设计中的思路,并通过案例讲解如何将桂林山水文化融入现代插画设计中,充分展现桂林山水的自然景观和丰富的文化内涵,使之成为具有独具特色和时代精神的插画作品。

关键词：桂林山水文化插画设计艺术设计

A novel cold-inducible promoter,PThCAP from Tamarix hispida,confers cold tolerance in transgenic Arabidopsis thaliana

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2018年第2期29卷 330-336页

作者： Xiaohong Guo Yandong Lv Hongyu Li Nan Fu Guiping Zheng lihua liu Yuhua Li State Key Laboratory of Tree Genetics and Breeding Northeast Forestry University Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement of Heilongjiang Province Agronomy College Heilongjiang Bayi Agricultural University College of Life Science and Technology Heilongjiang Bayi Agricultural University College of Life Sciences Daqing Bio-tech Research InstituteNortheast Forestry University

Our previous studies have revealed that the Th CAP gene plays a vital role in transgenic Populus(P.davidiana 9 P.bolleana) in response to cold stress.However,the regulatory mechanism of Th CAP gene expression has been unclear.In this study,the 50 flanking region of the Th CAP promoter(PTh CAP) was cloned using a genomewalking method.By analyzing cis-acting regulatory elements of PTh CAP,a DRE motif and MYC and MYB elements were found to be located in the promoter.To identify the regulatory elements that control the expression of the Th CAP gene promoter,a series of deletion derivatives ofPTh CAP,P1–P5,from the translation start code(-1538,-1190,-900,-718 and-375 bp),were fused to the GUS reporter gene,and then each deletion was stably introduced into Arabidopsis thaliana plants.Deletion analysis of the promoter suggested that only the P2 fragment had strong GUS expression in leaves and roots of A.thaliana exposed to low temperature stress.These results suggest that this290-bp region(-1190 to-900 bp),as an important part in PTh CAP,was associated with cold tolerance of A.thaliana.Our results provide evidence for the regulatory mechanism of Th CAP gene involved in the response to cold stress,and that the gene is promising candidate gene for genetic improvement of crops.

关键词： Arabidopsis thaliana Cis-acting elements GUS expression PThCAP ThCAP gene