检索结果-南通市图书馆

Structural and Histochemical Features of the Slow-Growing Perennial Coptis chinensis Franch.(Ranunculaceae)

在线全文

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2021年第6期90卷 1685-1696页

作者： Jingyuan yang Jie Zhou Jiaojiao Jin Yi Li Xia Zhang Teng Li Mengdi Zhang Xiaodong Cai chaodong yang Cunyu Zhou Hubei Province Key Laboratory of Conservation Biology for Shennongjia Golden Monkey Shennongjia National Park AdministrationMuyu Town42400China Ningxia Jiesi Environmental Protection Technology Co. Ltd.Yinchuan750000China Engineering Research Center of Ecology and Agriculture Use of Wetland Ministry of EducationHubei Key Laboratory of Waterlogging Disaster and Agricultural Use of WetlandYangtze UniversityJingzhou434025China

Huanglian(Coptis chinensis Franch.)is a slow-growing perennial medicinal herb with considerable economic *** study aimed to determine the structural characteristics and the levels of berberine deposits in the organs and tissues of Huanglian using light and epifluorescence *** adventitious roots are composed of primary and secondary structures with endodermis,exodermis,and *** rhizome structures are composed of primary and secondary structures with cuticle and *** leaves are composed of sclerenchymatous rings,isolateral mesophyll,and thin *** detected berberine in the xylem walls of the roots and rhizomes as well as in the sclerenchymatous rings of the *** postulate that as the exodermis is developed,the deposition of berberine in the xylem closest to the root tips may affect water and nutrient absorption and *** blades had a thin cuticle and isolateral mesophyll,suggesting shade *** structural and histochemical features suggest that Huanglian is adapted to the slow growing nature of a shady environment.

关键词： Berberine deposition Coptis chinensis histochemistry structure

Massively parallel algorithms for fully dynamic all-pairs shortest paths

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

Frontiers of Computer Science 2024年第4期18卷 201-203页

作者： Chilei WANG Qiang-Sheng HUA Hai JIN chaodong ZHENG National Engineering Research Center for Big Data Technology and System Services Computing Technology and System LabCluster and Grid Computing LabSchool of Computer Science and TechnologyHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Novel Software Technology Nanjing UniversityNanjing 210023China

1 Introduction In recent years,the Massively Parallel Computation(MPC)model has gained significant ***,most of distributed and parallel graph algorithms in the MPC model are designed for static graphs[1].In fact,the graphs in the real world are constantly *** size of the real-time changes in these graphs is smaller and more *** graph algorithms[2,3]can deal with graph changes more efficiently[4]than the corresponding static graph ***,most studies on dynamic graph algorithms are limited to the single machine ***,a few parallel dynamic graph algorithms(such as the graph connectivity)in the MPC model[5]have been proposed and shown superiority over their parallel static counterparts.

关键词： dynamic shortest gained

Dry deposition of ammonia around paddy fields in the subtropical hilly area in southern China

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

Atmospheric and Oceanic Science Letters 2020年第3期13卷 216-223页

作者： YI Yuchen SHEN Jianlin yang chaodong WANG Juan LI Yong WU Jinshui College of Horticulture and Gardening Yangtze UniversityJingzhouChina Key Laboratory of Agro-ecological Processes in Subtropical Regions Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina Changsha Research Station for Agricultural&Environment Monitoring Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina

This study measured the ammonia(NH3)concentration and dry deposition within 100 m around paddy fields(0.6 ha)with double rice cropping in the subtropical hilly area in southern China,with the aims to quantify the dry deposition of NH3 around the emission source and to clarify its temporal and spatial *** results showed that high NH3 concentrations were found during the 15 d after nitrogen(N)fertilizer application at downwind sites within 100maround the paddy fields,and the NH3 concentrations were 12–62,2.8–7.3,13–38,and 4.9–36μg N m−3 during the 15 d after basal fertilizer application and topdressing in the early rice season and after basal fertilizer application and topdressing in the late rice season,*** NH3 concentrations were relatively low(1.5–-3.8μg N m−3)during other periods of the rice season at the downwind sites,which indicated that N fertilizer application in paddy fields highly affected the NH3 concentration at downwind *** NH3 concentrations at the downwind sites decreased significantly with the increase in distance from the paddy *** total NH3 dry deposition around 100 m of the paddy fields accounted for approximately 79%and 81%of the emitted NH3 from the paddy fields in the early and late rice seasons,*** results indicate that dry deposition of NH3 around emission sources may be an important way to remove the NH3 volatilized from croplands in this subtropical hilly area.

关键词： Ammonia dry deposition nitrogen deposition ammonia volatilization paddy field

Eleven new species of the genus Ourapteryx Leach,1814(Lepidoptera:Geometridae)from China

在线全文

学校读者我要写书评

暂无评论

Zoological Systematics 2024年第2期49卷 158-174页

作者： Rui Cheng Nan Jiang chaodong Zhu Yongqiang Xu Hongxiang Han Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China Institute of Plateau Biology of Xizang Autonomous Region Lhasa 850000China

Eleven new species of Ourapteryx Leach,1814 were described:*** Jiang&Han,***.,*** Cheng&Han,***.,*** Cheng&Jiang,***.,*** Jiang&Cheng,***.,*** Jiang&Cheng,***.,*** Jiang&Cheng,***.,*** Cheng&Zhu,***.,*** Cheng&Jiang,***.,*** Cheng&Han,***.,*** Cheng&Han,***.,*** Cheng&Zhu,*** for these new species are provided,with illustrations of external features and genitalia.

关键词： Ennominae morphology taxonomy

Fantastic Chinese Architecture

在线全文

学校读者我要写书评

暂无评论

China Book International 2024年第3期 114-115页

作者： Li chaodong Department of History of East China Normal University

This book not only describes the origin and development of architecture in Chinese history in terms of time,but also shows unique traditional dwellings indifferent places in thevast land of China from the perspective of *** book is also accompanied by interesting animations related to architecture to enhance children's interest in reading and helpthem underst and rich and interesting architectural *** English version of the series has been exported to the United States,Canada,the United Kingdom,Sweden,and other countries.

关键词： Canada has architectural

维普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

Dujiangyan

China Book International 2024年第2期 7-9页

作者： Li chaodong 不详

This series is an original picture book which applies a very oriental Chinese painting style with vivid pictures and content,which can make more teenagers better understand Chinese civilization and Chinese science and... 详细信息

关键词： technology. peace weather

维普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

用DHS螺钉治疗股骨粗隆间骨折

航空航天医药 2006年第1期17卷 20-21页

作者：杨朝栋贵州贵航集团303医院骨科 561100

目的:探讨应用动力髓螺钉(DHS)治疗股骨粗隆部骨折的效果。方法:采用DHS治疗股骨粗隆部骨折45例。结果:经过平均18个月的随访,45例均达临床愈合,按董纪元疗效评价标准,优27例,良12例,可6例,优良率达87%。结论:DHS治疗股骨粗隆部骨折固... 详细信息

目的:探讨应用动力髓螺钉(DHS)治疗股骨粗隆部骨折的效果。方法:采用DHS治疗股骨粗隆部骨折45例。结果:经过平均18个月的随访,45例均达临床愈合,按董纪元疗效评价标准,优27例,良12例,可6例,优良率达87%。结论:DHS治疗股骨粗隆部骨折固定可靠,操作易掌握,髋内翻发生率低,是目前治疗股骨粗隆部骨折较理想的方法之一。

关键词：动力髋螺钉股骨粗隆部骨折

可吸收螺钉治疗后交叉韧带胫骨附着部撕脱骨折

在线全文

学校读者我要写书评

暂无评论

航空航天医药 2005年第4期16卷 13-14页

作者：杨朝栋贵州贵航集团303医院骨科 561100

目的:利用可吸收螺钉治疗后交叉韧带胫骨附着部撕脱骨折的固定,避免二次手术创伤。方法:早期行切开复位可吸收螺钉内固定,术前,手术当天及术后定期摄X片。结果:平均随诊14个月,己随诊患者伤肢局部功能情况和影像学检查结果综合评价标准[... 详细信息

目的:利用可吸收螺钉治疗后交叉韧带胫骨附着部撕脱骨折的固定,避免二次手术创伤。方法:早期行切开复位可吸收螺钉内固定,术前,手术当天及术后定期摄X片。结果:平均随诊14个月,己随诊患者伤肢局部功能情况和影像学检查结果综合评价标准[1],早期手术疗效优34例,可2例。结论:可吸收螺钉治疗后交叉韧带胫骨附着部撕脱骨折可达到早期固定可靠,避免二次手术创伤,是一种较好的选择。

关键词：可吸收螺钉后交叉韧带撕脱骨折

在线全文

学校读者我要写书评

暂无评论

湘西黑色岩系地球化学特征和成因意义

岩石矿物学杂志 1999年第1期18卷 26-39页

作者：吴朝东杨承运陈其英北京大学地质学系中国科学院地质研究所

本文采用ＧＣ＿ＭＳ、ＩＣＰ＿ＭＳ、形态硫分析、硫同位素、物相分析等方法综合研究了湘西晚震旦世－早寒武世黑色岩系的地球化学特征和形成条件。湘西黑色岩系以富有机质为特征，其来源为藻、菌类生物，形成于缺氧环境。缺氧标志包括... 详细信息

本文采用ＧＣ＿ＭＳ、ＩＣＰ＿ＭＳ、形态硫分析、硫同位素、物相分析等方法综合研究了湘西晚震旦世－早寒武世黑色岩系的地球化学特征和形成条件。湘西黑色岩系以富有机质为特征，其来源为藻、菌类生物，形成于缺氧环境。缺氧标志包括有机碳、黄铁矿含量、硫同位素、稀土元素的分布、δＵ、ＤＯＰ和生物标志物等参数。在黑色页岩中富集Ｖ、Ｎｉ、Ｍｏ等微量元素，并在局部地区形成具有工业价值的矿床。研究认为，生物、有机质对一些元素的吸收、络合作用是黑色岩系中富集多种元素的主要原因。稀土元素的分布和硫同位素的组成表明湘西黑色岩系形成于缺氧的陆架边缘浅海环境，海底热液活动为其提供了丰富的物质来源。

关键词：黑色岩系地球化学缺氧环境有机质湘西页岩