检索结果-南通市图书馆

Comparative effects of plant growth regulators on leaf and stem explants of Labisia pumila var. alata

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 621-631页

作者： anna Pick Kiong LING Kinn Poay TAN Sobri HUSSEIN division of Human Biology International Medical University department of Science Faculty of Engineering and Science Universiti Tunku Abdul Rahman Agrotechnology and Bioscience division Malaysian Nuclear Agency

Objective: Labisia pumila var. alata, commonly known as 'Kacip Fatimah' or 'Selusuh Fatimah' in Southeast Asia, is traditionally used by members of the Malay community because of its post-partum medicinal properties. Its various pharmaceutical applications cause an excessive harvesting and lead to serious shortage in natural habitat. Thus, this in vitro propagation study investigated the effects of different plant growth regulators (PGRs) on in vitro leaf and stem explants of L. pumila. Methods: The capabilities of callus, shoot, and root formation were evaluated by culturing both explants on Murashige and Skoog (MS) medium supplemented with various PGRs at the concentrations of 0, 1, 3, 5, and 7 mg/L. Results: Medium supplemented with 3 mg/L indole-3-butyric acid (IBA) showed the optimal callogenesis from both leaf and stem explants with (72.34±19.55)% and (70.40±14.14)% efficacy, respectively. IBA was also found to be the most efficient PGR for root induction. A total of (50.00±7.07)% and (77.78±16.47)% of root formation were obtained from the in vitro stem and leaf explants after being cultured for (26.5±5.0) and (30.0±8.5) d in the medium supplemented with 1 and 3 mg/L of IBA, respectively. Shoot formation was only observed in stem explant, with the maximum percentage of formation ((100.00±0.00)%) that was obtained in 1 mg/L zeatin after (11.0±2.8) d of culture. Conclusions: Callus, roots, and shoots can be induced from in vitro leaf and stem explants of L. pumila through the manipulation of types and concentrations of PGRs.

关键词： Auxin Cytokinin Labisia pumila In vitro propagation Plant growth regulators

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

Social and ecological complexity is associated with gestural repertoire size of wild chimpanzees

引用

Integrative Zoology 2020年第4期15卷 276-292页

作者： Sam G.B.ROBERTS anna I.ROBERTS School of Psychology Faculty of HealthLiverpool John Moores UniversityLiverpoolUK Institute of Human Biology and EvolutionAdam Mickiewicz University PoznanPoland department of Psychology University of ChesterChesterUK

Increasing our understanding of primate gestural communication can provide new insights into language evolution.A key question in primate communication is the association between the social relationships of primates and their repertoire of *** analyses can reveal how primates use their repertoire of gestural communication to maintain their networks of family and friends,much as humans use language to maintain their social *** this study we examined the association between the repertoire of gestures(overall,manual and bodily gestures,and gestures of different modalities)and social bonds(presence of reciprocated grooming),coordinated behaviors(travel,resting,co-feeding),and the complexity of ecology(***,illumination)and sociality(party size,audience),in wild East African chimpanzees(Pan troglodytes schweinfurthii).A larger repertoire size of manual,visual gestures was associated with the presence of a relationship based on reciprocated grooming and increases in social complexity.A smaller repertoire of manual tactile gestures occurred when the relationship was based on reciprocated grooming.A smaller repertoire of bodily gestures occurred between partners who jointly traveled for *** gesture repertoire size was associated with social complexity,complex ecology also influenced repertoire *** evolution of a large repertoire of manual,visual gestures may have been a key factor that enabled larger social groups to emerge during ***,the evolution of the larger brains in hominins may have co-occurred with an increase in the cognitive complexity underpinning gestural communication and this,in turn,may have enabled hominins to live in more complex social groups.

关键词： chimpanzee ecology gesture repertoire size sociality social network analysis

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

Planar Blatter radicals through Bu_(3)SnH-and TMS_(3)SiH-assisted cyclization of aryl iodides: azaphilic radical addition

引用

Organic Chemistry Frontiers 2022年第4期9卷 929-938页

作者： Paulina Bartos Małgorzata Celeda anna Pietrzak Piotr Kaszynski Faculty of Chemistry University ofŁodz91-403ŁodzPoland Faculty of Chemistry Łodz University of Technology90-924ŁodzPoland Centre of Molecular and Macromolecular Studies Polish Academy of Sciences90-363ŁodzPoland department of Chemistry Middle Tennessee State UniversityMurfreesboroTennessee 37132USA

Bu_(3)SnH-and TMS_(3)SiH-assisted cyclizations of iodoarene derivatives of benzo[e][1,2,4]triazine lead to the formation of planar Blatter radicals(2-phenyl-3H-[1,2,4]triazino[5,6,1-kl]phenoxazin-3-yls and 2-phenyl-3H... 详细信息

关键词： cyclization radicals

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

Cu/TiO_(2) Photocatalysts for CO_(2) Reduction: Structure and Evolution of the Cocatalyst Active Form

引用

Transactions of Tianjin University 2024年第2期30卷 140-151页

作者： Andrey A.Saraev anna Yu.Kurenkova denis d.Mishchenko Alexandr L.Trigub Evgeniy Yu.Gerasimov Ekaterina A.Kozlova Boreskov Institute of Catalysis Lavrentieva Ave 5Novosibirsk 630090Russia Synchrotron Radiation Facility SKIF Boreskov Institute of CatalysisNikol’skiy Ave 1Kol’tsovo 630559Russia National Research Center “Kurchatov Institute”Kurchatova Sq 1Moscow 123182Russia

Extensive work on a Cu-modified TiO_(2) photocatalyst for CO_(2) reduction under visible light irradiation was conducted. The structure of the copper cocatalyst was established using UV-vis diff use refl ectance spectroscopy, high-resolution transmis- sion electron microscopy, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy. It was found that copper exists in different states (Cu 0 , Cu^(+) , and Cu^(2+) ), the content of which depends on the TiO_(2) calcination temperature and copper loading. The optimum composition of the cocatalyst has a photocatalyst based on TiO_(2) calcined at 700℃ and modified with 5 wt% copper, the activity of which is 22 μmol/(h·g cat ) (409 nm). Analysis of the photocatalysts after the photocatalytic reaction disclosed that the copper metal on the surface of the calcined TiO_(2) was gradually converted into Cu_(2) O during the photocatalytic reaction. Meanwhile, the metallic copper on the surface of the noncalcined TiO_(2) did not undergo any trans- formation during the reaction.

关键词： Photocatalysis Photocatalytic CO_(2)conversion Visible light Titanium dioxide Copper Copper oxides Methane formation Photocatalyst transformation

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

does Foreign direct Investment Affect S0_(2) Emissions in the Yangtze River delta?A Spatial Econometric Analysis

引用

Chinese Geographical Science 2021年第3期31卷 400-412页

作者： GUO Zheng Sophia Shuang CHEN YAO Shimou anna Charles MKUMBO Key Laboratory of Watershed Geographic Sciences Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China School of Geography Nanjing University of Information Science&TechnologyNanjing 210000China Faculty of Science&Technology Teofilo Kisanji UniversityMbeya 999132Tanzania

As the major source of air pollution,sulfur dioxide(S0_(2))emissions have become the focus of global ***,existing studies rarely consider spatial effects when discussing the relationship between foreign direct investment(FdI)and S0_(2) *** study took the Yangtze River delta as the research area and used the spatial panel data of 26 cities in this region for *** study investigated the spatial agglomeration effects and dynamics at work in FdI and S0_(2) emissions by using global and local measures of spatial ***,based on regression analysis using a results of traditional ordinary least squares(OLS)model and a spatial econometric model,the spatial durbin model(SdM)with spatial-time effects was adopted to quantify the impact of FdI on S0_(2) emissions,so as to avoid the regression results bias caused by ignoring the spatial *** results revealed a significant spatial autocorrelation between FdI and S0_(2) emissions,both of which displayed obvious path dependence characteristics in their geographical distribution.A series of agglomeration regions were observed on the spatial *** estimation results of the SdM showed that FdI inflow promoted S0_(2) emissions,which supports the pollution haven *** findings of this study are significant in the prevention and control of air pollution in the Yangtze River delta.

关键词： foreign direct investment(FdI) sulfur dioxide(S0_(2))emissions spatial durbin model(SdM) spatial correlation Yangtze River delta

来源：

维普期刊数据库

同方期刊数据库评论

维普期刊数据库

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：