检索结果-南通市图书馆

Traits of an invasive grass conferring an early growth advantage over native grasses

Journal of Plant Ecology 2016年第6期9卷 672-681页

作者： Lara G.reichmann Susanne Schwinning H.Wayne Polley Philip A.fay Department of Integrative Biology University of Texas at AustinAustinTX 78712USA USDA-ArS Grassland Soil and Water Research Laboratory808 E Blackland RoadTempleTX 76502USA Department of Biology Texas State UniversitySan MarcosTX 78666USA

Aims Invasive species often have higher relative growth rates(rGr)than their native *** use efficiency,total leaf area and specific leaf area(SLA)are traits that may confer rGr differences between natives and invasives,but trait differences are less prominent when the invasive species belongs to the same plant functional type as the dominant native ***,we test if traits displayed soon after germination confer an early size ***,we predicted that invasive species seedlings grow faster than the natives because they lack trade-offs that more strongly constrain the growth of native *** We quantified plant morphological and physiological traits and rGr during early seedling growth at high and low nutrient levels in three dominant perennial native C_(4) grasses:Panicum virgatum L.(switchgrass),Schizachyrium scoparium(Michx.)Nash(little bluestem)and Andropogon gerardii Vitman(big bluestem);and a perennial C_(4) exotic invasive grass,Sorghum halepense(L.)Pers.(Johnsongrass).Important Findings After 2 weeks of growth,Johnsongrass seedlings had greater biomass,SLA and photosynthetic nitrogen use efficiency,but lower leaf N concentrations(%leaf N)and root:shoot ratio than *** growth continued,Johnsongrass more quickly produced larger and thicker leaves than the natives,which dampened the growth advantage past the first 2 to 3 weeks of *** in carbon gain appears to be the best explanation for the early growth advantage of *** natives,growth was constrained by an apparent trade-off between allocation to root biomass,which reduced SLA,and production of leaves with high N content,which increased carbon *** Johnsongrass,root:shoot ratio did not interact with other traits,and%leaf N was decoupled from rGr as a result of a trade-off between the positive indirect association of%leaf N with rGr and the negative direct association of%leaf N with rGr.

关键词： biomass allocation invasive plants rGr Sorghum halepense trade-offs trait development

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

role of Green Governance in Achieving Sustainable Urbanization in China

引用

China & World Economy 2014年第5期22卷 19-36页

作者： Marianne fay Jin-zhao Wang Gailius Draugelis Uwe Deichmann World Bank Industrial Economics research Department Development Research Center of the State Council of People 's Republic of China China Office World Bank Development research Group World Bank

Since economic reforms began in 1978, China＇s urban population has increased by half a billion. Over the next 20years, cities will likely add another 300 million people through local population growth, migration and the integration of nearby rural areas, Cities account for the majority of resource use and pollution so achieving greener growth will depend on developing and implementing a more sustainable urbanization model. China＇s leaders have responded to these challenges with ambitious goals and comprehensive environmental laws and regulations. These have so far not significantly reduced the harm from air, water and soil pollution.＂ in large measure because China ＂s green governance does not match its green ambitions. Drawing on the World Bank ＇s work on green growth and a recent joint urbanization study by the Development research Center of China＇s State Council and the Worm Bank, this paper reviews recent academic research on green governance in urban China and discusses its main implications in the context of emerging global green growth concepts.

关键词： environmental institutions green growth urbanization

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

应激状态下血红素氧合酶抑制血栓形成研究

引用

中华血液学杂志 2005年第11期26卷 665-668页

作者：彭林 fay William 天津第一中心医院检验学部 300192 Uni-versity of Michigan Medical School Internal Medicine/Cardiology

目的探索血红素氧合酶(HO-1)对体内血栓形成的调节功能,并探求其可能机制。方法基因敲除技术培育出C57BL/6J HO-1杂合小鼠(HO-1+/-),在杂合小鼠子代中用PCr方法筛选出同代野生型小鼠(Wt)以及基因缺失型小鼠(HO-1-/-);用FeCl3刺激鼠颈动... 详细信息

目的探索血红素氧合酶(HO-1)对体内血栓形成的调节功能,并探求其可能机制。方法基因敲除技术培育出C57BL/6J HO-1杂合小鼠(HO-1+/-),在杂合小鼠子代中用PCr方法筛选出同代野生型小鼠(Wt)以及基因缺失型小鼠(HO-1-/-);用FeCl3刺激鼠颈动脉并记录栓塞时间;Western blot及化学法确定实验动物血小板HO-1、环状一磷酸鸟苷(cGMP)表达水平,并用常规方法检测血小板聚集率。结果Wt小鼠的平均栓塞时间为(15.56±1.25)min,HO-1-/-小鼠为(12.85±0.55)min,差异无统计学意义(n=14,P>0.05)。经氧化血红素预刺激后,Wt小鼠的栓塞时间[(16.25±1.20)min]与HO-1-/-小鼠[(11.96±0.98)min]相比显著延长(P<0.05)。同时,连续3d的氧化血红素注射,可使Wt小鼠血小板中HO-1的蛋白表达提高约4倍;腺苷二磷酸(ADP)诱导的血小板聚集在Wt小鼠中出现显著降低;Wt小鼠与HO-1-/-小鼠血小板相比cGMP水平可被氧化血红素显著上调。结论在HO-1表达升高的应激条件下,血小板性血栓的形成受到抑制,此作用依赖于体内HO-1的存在,并与cGMP有关。

关键词：应激状态血红素氧合酶血栓形成腺苷二磷酸血小板

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

Spatial cloud computing: how can the geospatial sciences use and help shape cloud computing?

引用

International Journal of Digital Earth 2011年第4期4卷 305-329页

作者： Chaowei Yang Michael Goodchild Qunying Huang Doug Nebert robert raskin Yan Xu Myra Bambacus Daniel fay Department of Geography and GeoInformation Science and Center for Intelligent Spatial Computing George Mason UniversityFairfax VA 22030-4444USA Department of Geography University of California5707 Ellison HallSanta Barbara CA 93106-4060USA Federal Geographic Data Committee 590 National CenterReston VA 20192USA NASA Jet Propulsion Laboratory 4800 Oak Grove Drive PasadenaCA 91109USA Microsoft research Connections MicrosoftRedmondWAUSA NASA Goddard Space Flight Center Code 700GreenbeltMD 20771USA

The geospatial sciences face grand information technology(IT)challenges in the twenty-first century:data intensity,computing intensity,concurrent access intensity and spatiotemporal *** challenges require the readiness of a computing infrastructure that can:(1)better support discovery,access and utilization of data and data processing so as to relieve scientists and engineers of IT tasks and focus on scientific discoveries;(2)provide real-time IT resources to enable real-time applications,such as emergency response;(3)deal with access spikes;and(4)provide more reliable and scalable service for massive numbers of concurrent users to advance public *** emergence of cloud computing provides a potential solution with an elastic,on-demand computing platform to integrateobservation systems,parameter extracting algorithms,phenomena simulations,analytical visualization and decision support,and to provide social impact and user feedbackthe essential elements of the geospatial *** discuss the utilization of cloud computing to support the intensities of geospatial sciences by reporting from our investigations on how cloud computing could enable the geospatial sciences and how spatiotemporal principles,the kernel of the geospatial sciences,could be utilized to ensure the benefits of cloud *** research examples are presented to analyze how to:(1)search,access and utilize geospatial data;(2)configure computing infrastructure to enable the computability of intensive simulation models;(3)disseminate and utilize research results for massive numbers of concurrent users;and(4)adopt spatiotemporal principles to support spatiotemporal intensive *** paper concludes with a discussion of opportunities and challenges for spatial cloud computing(SCC).

关键词： digital earth Cyber GIS geodynamics space-time high-performance computing geospatial cyberinfrastructure

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

Productivity of well-watered Panicum virgatum does not increase with CO_(2) enrichment

引用

Journal of Plant Ecology 2012年第4期5卷 366-375页

作者： Philip A.fay H.Wayne Polley Virginia L.Jin Michael J.Aspinwall USDA-ArS Grassland Soil and Water research Laboratory 808 E Blackland RdTempleTX 76502USA USDA-ArS Agroecosystem Management research 137 Keim HallUniversity of Nebraska-LincolnLincolnNE 68583USA Section of Integrative Biology 1 University StationC0930University of Texas at AustinAustinTX 78712USA

Aims rising atmospheric CO_(2) has been shown to increase aboveground net primary productivity(ANPP)in water-limited perennial grasslands,in part by reducing stomatal conductance and transpiration,thereby reducing depletion of soil ***,the benefits of CO_(2) enrichment for ANPP will vary with soil type and may be reduced if water limitation is *** is known about CO_(2) effects on ANPP of Panicum virgatum,a perennial C4 tallgrass and potential bioenergy *** hypothesized that if water limitation is minimized,(i)CO_(2) enrichment would not increase *** ANPP because photosynthetic rates of this C4 grass would not increase and because decreased transpiration at elevated CO_(2) would provide little additional benefit in increased soil moisture and(ii)soil type will have little effect on *** CO_(2) responses because of high overall soil *** Growth and leaf physiology of *** cv.‘Alamo’were studied as plants established for 4 years on silty clay and clay soils along a 250 to 500 ll l-1 gradient in atmospheric CO_(2) located in central Texas,*** were watered to replace evapotranspiration,fertilized with NO_(3)NH_(4) and P_(2)O_(5) and clipped to standard height during *** Findings ANPP increased through the third year of *** moisture(0–20 cm),ANPP,tiller numbers and leaf area index were 8–18%higher on the clay than on the silty clay *** did not increase with CO_(2) except in the planting ***,biomass removed with clipping strongly increased with CO_(2) in years 2 and 3,suggesting that CO_(2) enrichment increased the early-to mid-season growth of establishing *** but not later regrowth or that of fully established ***,CO_(2) enrichment differentially affected two components of ANPP in years 2 and 3,increasing tiller mass and reducing tiller *** reallocation of resources in clipped *** suggested increased meristem limitation of productivi

关键词： switchgrass bioenergy resource allocation tillering meristem limitation

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

Gender and rural transformation:A systematic literature review

引用

Journal of Integrative Agriculture 2023年第12期22卷 3624-3637页

作者： Maria fay rOLA-rUBZEN Hue T.VUONG Claire DOLL Curtis rOLLINS Jon Marx SArMIENTO Mohammad Jahangir ALAM Ismat Ara BEGUM UWA School of Agriculture and Environment The University of Western AustraliaPerthWA 6009Australia Centre of Science and Technology research and Development Thuongmai UniversityHanoi 100000Vietnam Department of Agribusiness and Marketing Bangladesh Agricultural UniversityMymensingh-2202Bangladesh

rural transformation can improve poverty reduction,living standards,and health outcomes in developing ***,impacts associated with rural transformation vary by region,household,and individual trait(including gender).While research on rural transformation has been increasing over the last decade,there has been no comprehensive review conducted on the relationships between gender and rural ***,we conduct a systematic literature review to investigate the impacts of rural transformation on gender and the influence of gender inclusiveness on rural *** reviewed 82 studies from 1960-2021 that explore the relationships between rural transformation and *** then developed a framework that captures incidences and flow directions between *** show that most studies examined the impacts of rural transformation on women and between gender *** investigated the role of women and the influence of gender inclusiveness on rural ***,studies showed that rural transformation typically leads to positive outcomes for women regarding employment,income,and ***,negative impacts on women’s control over income,stability of new income sources,and access to healthy food are also *** future development policies and programs to explicitly account for gender inclusiveness can lead to more successful rural transformation.

关键词： gender rural transformation structural transformation women’s empowerment

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

Linking inflammation and thrombosis:role of C-reactive protein

引用

World Journal of Cardiology 2010年第11期2卷 365-369页

作者： William P fay Department of Internal Medicine and Medical Pharmacology and Physiology University of MissouriSchool of Medicineand the Research ServiceHarry S.Truman Memorial Veterans Affairs HospitalColumbiaMO 65212United States

C-reactive protein(CrP) is a biomarker of *** plasma levels of CrP are associated with an increased risk of myocardial ***,the correlation between plasma CrP concentration and atherosclerotic plaque burden is *** on these observations,it has been hypothesized that CrP increases the risk of myocardial infarction by promoting *** article reviews available data that link enhanced CrP expression to increased risk of thrombosis,with a focus on the effects of CrP on hemostasis,platelet function,and ***,the available data support the hypothesis that CrP is an important mechanistic link between inflammation and throm bosis.

关键词： C-reactive protein Thrombosis Inflammation Tissue factor Fibrinolysis Plasminogen activator inhibitor-1

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

Screening of biological activities of Polygonum maritimum *** A lgerian coast

引用

Asian Pacific Journal of Tropical Biomedicine 2013年第8期3卷 611-616页

作者： Imad Abdelhamid El-Haci Fawzia Atik Bekkara Wissame Mazari fay al Hassani Mohamed AmineDidi Laboratoire des Produits Naturels BP 119 Imama13000Université Abou Bekr Belkaid-Tlemcen-Algérie Laboratoire d'Ecologie et Gestion des Ecosystèmes Naturels BP 119 Imama13000Université Abou Bekr Belkaid-Tlemcen-Algérie Laboratoire des Technologies de Séparations et de Purifications BP 119 Imama13000Université Abou Bekr Belkaid-Tlemcen-Algérie

Objective:To investigate the antioxidant and the antibacterial activities of crude extract from aerial part of Polygonum maritimumL.(Polygonaceae)(***)and to find new actives ***:The whole plant was collected from the rechgoune coast(West of Algeria),and methanolic crude extract of aerial parts ***(PMCE)was *** extract was tested against different bacterial strain and tested for his ability to neutralize free radical(DPPH)and to scavenge the ***:PMCE had a very high content of total phenol,which was(352.49依18.03)mg/g dry weight,expressed as gallic acid *** exhibited excellent antioxidant activity,as measured using DPPH and H2O2 scavenging *** also showed a high antibacterial activity against gram-positive bacterial strains:Bacillus cereus,Bacillus subtilisandStaphylococcus aureus with an highest MIC of 120μg/***:The antioxidant and antibacterial activity of the PMCE is probably due to phenolic compounds present in the *** contemporary presence of antioxidant and antibacterialactivities in the PMCE suggests that this plant may be a source of bioactive substances with multifaceted activity.

关键词： Polygonum maritimumL. Phenolic compounds Antioxidant activity Antibacterial activity

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

Decolonization of the Filipino Church after Vatican II

引用

History research 2015年第1期5卷 28-44页

作者： Terence J. fay SJ University of St. Michael's College Toronto Canada

The second great paradigm shift in the history of the Catholic Church arrived after Vatican II, which ended the lengthy sway of the Greco-roman Church and led, as Karl rahner has written, to “the Church actualizing itself precisely as a world Church.” This statement has enormous consequences for the Catholic Church in the Philippines where Vatican II initiated a major paradigm shift. Vatican II decolonized the Latin Spanish church imposed upon the Philippines in the seventeenth century and transformed it into the Catholic Church of the Philippines, that is to say, transformed it into a church deeply rooted in the Filipino soil, language, and culture. Twenty-nine Filipinos chosen by snowball method of selection were interviewed who reported on how they received the teachings of Vatican II on inculturation and equality and were thus decolonized the Catholic Church.

关键词： decolonization Filipino Vatican II liturgy interreligious contact

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

Worldwide or Territorial Approach for Individual Income Tax, Which is More Prevalent？

引用

Journal of Modern Accounting and Auditing 2017年第4期13卷 137-151页

作者： Connie Shum Jack fay Gladie Lui Pittsburg State University Pittsburg USA Lingnan University TuenMun Hong Kong

For individuals who are contemplating relocating, how their income will be taxed might be an important factor when deciding whether or not to take up residence in another country. Two income approaches are commonly used around the globe. Worldwide income approach （also known as a global tax system） taxes income from whatever source derived. Territorial income approach taxes only income earned within the country＇s borders. Using information collected from PricewaterhouseCoopers＇ website1 that provides information on tax systems used in countries around the world, this paper examines which countries apply worldwide or global income approach and which employ territorial approach to determine the legitimate source of taxable income. The research focuses on countries within：（1） Americas; （2） Asia/Pacific Basin; （3） Europe; and （4） Africa/Middle and Near East. Based on the information collected and presented in this paper, the worldwide approach is much more prevalent （104 countries） than the territorial approach （30 countries）. This paper also investigates any specific rules that a particular country has in relation to income to be taxed and residency versus non-residency status of the taxpayers. There appears to be an abundant spectrum of rules relating to residency and domicile for tax purposes among the countries.

关键词： individual income tax global individual income tax worldwide/territorial income approach

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

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：