检索结果-南通市图书馆

Relationship between Physical and Chemical Soil Attributes and Plant Species Diversity in Tropical Mountain Ecosystems from Brazil

引用

Journal of Mountain Science 2014年第4期11卷 875-883页

作者： Ferna de CARVALHO edward luis godoy Francy J. G. LISBOA Fatima Maria de Souza MOREIRA Francisco Adriano de SOUZA Ricardo luis Louro BERBARA G Wilson FERNES Laboratory of Evolutionary Ecology and Biodiversity Department of Geral Biology Institute of Biology Sciences Federal University of Minas Gerais Belo Horizonte MG 30161-901 P.O. Box 486 Brazil Department of Biology Microbiology and Biological Processes Department of Soil Science Federal University of LavrasLavras Minas Gerais 37200-000 P.O.Box 3037 Brazil Department of Biological Sciences Ferderal University of S?o Jo?o Del Rei S?o Jo?o del-Rei Minas Gerais 36307-352Brazil Laboratory of Soil Biology Department of Soil Science Federal Rural University of Rio de Janeiro Seropédica Rio de Janeiro 23890-000 Brazil Embrapa Maize and Sorghum Center for Applied Biology Rod. MG 424 KM 45 Caixa Postal Sete Lagoas Minas Gerais 35701-970 P.O. Box 285 Brazil

Although the high diversity of plant species in the rupestrian fields has been primarily attributed to the existence of a set of distinct habitats, few studies support this assertion. The present study aimed to further investigate the relationship between physical and chemical attributes of soils with the diversity of plant species in this unique ecosystem. The rupestrian field is a unique vegetation formation that covers some of the southeastern Brazilian mountains in the transition of the Atlantic rain forest and the Cerrado(savanna). Different habitats occur according to soil characteristics(e.g., presence of rocks, sand, fertility, hydrology, etc.). These attributes ultimately influence the vegetation that is highly adapted to the harsh edaphic and climatic mountain conditions. Five distinct habitats were studied by us: rocky outcrops, peat bogs, sandy bogs, quartz gravel fields, and "cerrado"(savanna). A floristic survey indicated that four families are found at greater frequency: Poaceae, Asteraceae, Cyperaceae, and Leguminosae. The greatest diversity of plant species was found in the rocky outcrops habitat, followed by cerrado, peat bog, quartz gravel grassland, and sandy bogs, respectively. The main difference in the floristic composition among these habitats was related to the dominant species. Trachypogon spicatus(Poaceae) was the most dominant species in the rocky outcrops, Axonopus siccus(Poaceae) in the peat bogs, Lagenocarpus rigidus(Cyperaceae) in the sandy bogs, Schizachyrium tenerum(Poaceae) in the cerrado, while Vellozia sp. 8(Velloziaceae) dominated the vegetation in the quartz gravel grassland. This study demonstrated that physical and chemical soil properties strongly related the diversity of plant species occurring in the different habitats of rupestrian fields.

关键词：植物物种多样性山地生态系统土壤特性热带雨林属性化学物理巴西

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

Assembly of IMPDH2-Based,CTPS-Based,and Mixed Rod/Ring Structures Is Dependent on Cell Type and Conditions of Induction

引用

Journal of Genetics and Genomics 2015年第6期42卷 287-299页

作者： Gerson Dierley Keppeke S.John Calise edward K.L.Chan luis Eduardo C.Andrade Rheumatology Division Federal University of Sao Paulo Department of Oral Biology University of Florida Immunology Division Fleury Medicine and Health Laboratories

Inhibition of guanosine triphosphate（GTP） and cytidine triphosphate（CTP） biosynthetic pathways induces cells to assemble rod/ring（RR） structures,also named cytoophidia,which consist of the enzymes cytidine triphosphate synthase（CTPS） and inosine-50-monophosphate dehydrogenase 2（IMPDH2）.We aim to explore the interaction of CTPS and IMPDH2 in the generation of RR *** La and COS-7 cells were cultured in normal conditions or in the presence of 6-diazo-5-oxo-L-norleucine（DON）,ribavirin,or mycophenolic acid（MPA）.Over 90% of DON-treated cells presented RR *** He La cells,35% of the RR structures were positive for IMPDH2 alone,26% were CTPS alone,and 31% were IMPDH2/CTPS mixed,while in COS-7 cells,42% of RR were IMPDH2 alone,41% were CTPS alone,and 10% were IMPDH2/CTPS *** and MPA treatments induced only IMPDH2-based *** were also transfected with an N-terminal hemagglutinin（NHA）-tagged CTPS1 *** 95% of NHA-CTPS1 transfected cells with DON treatment presented IMPDH2-based RR and almost 100% presented CTPS1-based RR;when treated with ribavirin,over 94% of transfected cells presented IMPDH2-based RR and 37% presented CTPS1-based RR,whereas 2% of untreated transfected cells presented IMPDH2-based RR and 28% presented CTPS1-based *** results may help in understanding the relationship between CTP and GTP biosynthetic pathways,especially concerning the formation of filamentous RR structures.

关键词： Nucleotide synthesis Enzyme aggregation Enzyme inhibition IMPDH2 CTPS

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

风压下钢储罐屈曲荷载下限值计算的难点

引用

钢结构(中英文) 2010年第12期 86-87页

作者： Eduardo M.Sosa luis A.godoy

介绍通用有限元代码编写的一种缺陷敏感壳单元,用于计算壳体屈曲荷载的下限值。风压下两种形状的钢储罐的稳定性较好,分别为:锥形顶式和顶部开口式。分析这两种钢储罐的一些几何关系,用于找出尺寸改变而引起的变化。折减能量法用于计算... 详细信息

介绍通用有限元代码编写的一种缺陷敏感壳单元,用于计算壳体屈曲荷载的下限值。风压下两种形状的钢储罐的稳定性较好,分别为:锥形顶式和顶部开口式。分析这两种钢储罐的一些几何关系,用于找出尺寸改变而引起的变化。折减能量法用于计算极限风压下钢储罐屈曲强度的下限值,而且将下限值与采用同一模型的静态非线性分析结果进行了比较。为优化原假设理论得到的结果,提出了实现折减能量法的另一个新思路。

关键词：屈曲非线性分析折减能量法储罐风压

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

建造中金属油罐在风荷载作用下的屈曲

引用

钢结构(中英文) 2010年第7期 82-83页

作者： Rossana C.Jaca luis A.godoy

通常按考虑最终形状方法设计壳体结构,因此,需假定结构满足稳定性要求。但是,中等风力作用下金属油罐频繁倒塌,这引起了高度重视。介绍了发生在阿根廷巴塔哥尼亚的中等风力作用下在建油罐倒塌的分析研究。虽以点焊方式固定油罐的圆筒部... 详细信息

通常按考虑最终形状方法设计壳体结构,因此,需假定结构满足稳定性要求。但是,中等风力作用下金属油罐频繁倒塌,这引起了高度重视。介绍了发生在阿根廷巴塔哥尼亚的中等风力作用下在建油罐倒塌的分析研究。虽以点焊方式固定油罐的圆筒部分,但倒塌时顶部移位。为了解倒塌机理,建立倒塌尽可能符合实际的壳体结构模型,进行了几何非线性有限元静力分析。结果表明,因为倒塌时存在风速,只能通过结构的一些特性即焊接的局部性、与底板连接的不充分性解释倒塌机理。

关键词：屈曲有限元倒塌油罐风

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Antibacterial approaches in tissue engineering using metal ions and nanoparticles:From mechanisms to applications

引用

Bioactive Materials 2021年第12期6卷 4470-4490页

作者： Maria godoy-Gallardo Ulrich Eckhard luis M.Delgado Yolanda J.D.de Roo Puente Mireia Hoyos-Nogués F.Javier Gil Roman A.Perez Bioengineering Institute of Technology Universitat Internacional de CatalunyaCarrer de Josep Trueta08195del VallèsSant CugatBarcelonaSpain Proteolysis Lab Department of Structural BiologyMolecular Biology Institute of BarcelonaCSICBarcelona Science ParkBaldiri Reixac 15-2108028BarcelonaSpain

Bacterial infection of implanted scaffolds may have fatal consequences and,in combination with the emergence of multidrug bacterial resistance,the development of advanced antibacterial biomaterials and constructs is of great *** decades ago,metals and their ions had been used to minimize bacterial infection risk and,more recently,metal-based nanomaterials,with improved antimicrobial properties,have been advocated as a novel and tunable alternative.A comprehensive review is provided on how metal ions and ion nanoparticles have the potential to decrease or eliminate unwanted *** mechanisms such as oxidative stress induction,ion release and disruption of biomolecules are currently well ***,the exact antimicrobial mechanisms of the discussed metal compounds remain poorly *** combination of different metal ions and surface decorations of nanoparticles will lead to synergistic effects and improved microbial killing,and allow to mitigate potential side effects to the *** with a general overview of antibacterial mechanisms,we subsequently focus on specific metal ions such as silver,zinc,copper,iron and gold,and outline their distinct modes of ***,we discuss the use of these metal ions and nanoparticles in tissue engineering to prevent implant failure.

关键词： Metal ions Metal nanoparticles Mechanism of action Antibacterial activity Tissue engineering Biomaterials applications

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

Agrobacterium-mediated transient transformation of Pentalinon andrieuxii Mü***.

引用

Advances in Bioscience and Biotechnology 2012年第3期3卷 256-258页

作者： Alejandro Yam-Puc Elide Aviles-Berzunza Manuel J.Chan-Bacab luis Manuel Pena-Rodriguez Gregorio godoy-Hernandez Centro de Investigacion Cientifica de Yucatan A.C.Laboratorio de Quimica OrganicaUnidad de BiotecnologiaMeridaMexico Unidad de Bioquimica y Biologia Molecular MeridaMexico Departamento de Microbiologia Ambiental y Biotecnologia Universidad Autonoma de CampecheCampecheMexico

Sections of hypocotyls, roots and leaves from Pentalinon andrieuxii plantlets were transiently transformed with Agrobacterium tumefaciens LBA4404 bearing the binary plasmid pCAMBIA2301 with an interrupted β-Glucuronidase (GUS) gene. Histochemical GUS assays showed transient gene expression in all infected tissues, being older roots those which displayed the most intense GUS staining. To our knowledge, this is the first report of Pentalinon andrieuxii susceptibility to Agrobacterium tumefaciens-mediated genetic transformation.

关键词： β-Glucuronidase Agrobacterium tumefaciens Kanamycin Apocynaceae

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

Geomechanical model for a seismically active geothermal field:Insights from the Tinguiririca volcanic-hydrothermal system

引用

Geoscience Frontiers 2019年第6期10卷 2117-2133页

作者： L.Giambiagi P.Alvarez S.Spagnotto E.godoy A.Lossada J.Mescua M.Barrionuevo J.Suriano IANIGLA CCT MendozaCONICETParque San Martín s/n5500MendozaArgentina TEHEMA S.A. Subercaseaux 4100PirqueChile Universidad Nacional de San luis Consejo Nacional de Investigaciones Científicas y TécnicasArgentina Universidad de Buenos Aires Consejo Nacional de Investigaciones Científicas y TécnicasInstituto de Estudios Andinos(IDEAN)Facultad de Ciencias Exactas y NaturalesBuenos AiresArgentina Facultad de Ciencias Exactas y Naturales Universidad Nacional de CuyoArgentina

In this work,we develop a multidisciplinary approach to investigate a geothermal system located at the volcanic arc of a subduction-related orogen and highlight the interplay between active *** field and fluid *** using results of field investigations from the Tinguiririca geothermal field in the High Andes of Chile(35°S),empirical analysis,and numerical models of static stress variations,we proposed a geomechanical model for evaluating the distribution of hydrothermal manifestations in a seismically-active *** present geomechanical model follows four major steps:(1)development of the 3 D structural model of fault pattern;(2)estimation of the in-situ stress field;(3)calculation of the resolved-shear-to-normal-stress ratio(slip tendency)on each fault with varying geomechanical parameters(coefficient of friction,pore pressure and cohesion)as inputs;and(4)estimation of Coulomb static stress changes as a consequence of failure in a nearby *** combination of all these analyses,we characterize in detail both the active deformation in the geothermal field and its relationship with hot fluid migration.

关键词： Southern central Andes Paleostress analysis Fluid migration Coulomb staric stress change

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

Anti-rods/rings autoantibody generation in hepatitis Cpatients during interferon-α/ribavirin therapy

引用

World Journal of Gastroenterology 2016年第6期22卷 1966-1974页

作者： Gerson Dierley Keppeke S John Calise edward KL Chan luis Eduardo C Andrade Rheumatology Division Escola Paulista de MedicinaUniversidade Federal de São PauloSP 04023-062Brazil Department of Oral Biology University of FloridaGainesvilleFL 32610-0424United States 3 Immunology DivisionFleury Medicine and Health Laboratories São PauloSP 04102-050Brazil

Chronic inflammation associated with hepatitis C virus(HCV) infection can lead to disabling liver diseases with progression to liver cirrhosis and hepatocellular carcinoma. Despite the recent availability of more effective and less toxic therapeutic options, in most parts of the world the standard treatment consists of a weekly injection of pegylated interferon α(IFN-α) together with a daily dose of ribavirin. HCV patients frequently present circulating non-organ-specific autoantibodies demonstrating a variety of staining patterns in the indirect immunofluorescence assay for antinuclear antibodies(ANA). Between 20% to 40% of HCV patients treated with IFN-α and ribavirin develop autoantibodies showing a peculiar ANA pattern characterized as rods and rings(RR) structures. The aim of this article is to review the recent reports regarding RR structures and anti-rods/rings(antiRR) autoantibody production by HCV patients after IFN-α/ribavirin treatment. Anti-RR autoantibodies first appear around the sixth month of treatment and reach a plateau around the twelfth month. After treatment completion, anti-RR titers decrease/disappear in half the patients and remain steady in the other half. Some studies have observed a higher frequency of anti-RR antibodies in relapsers, i.e., patients in which circulating virus reappears after initially successful therapy. The main target of anti-RR autoantibodies in HCV patients is inosine-5'-monophosphate dehydrogenase 2(IMPDH2), the rate-limiting enzyme involved in the guanosine triphosphate biosynthesis pathway. Ribavirin is a direct IMPDH2 inhibitor and is able to induce the formation of RR structures in vitro and in vivo. In conclusion, these observations led to the hypothesis that anti-RR autoantibody production is a human model of immunologic tolerance breakdown that allows us to explore the humoral autoimmune response from the beginning of the putative triggering event: exposure to ribavirin and interferon.

关键词： Rods and rings autoantibodies Hepatitis C ribavirin Interferon-α

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

Spatial study of particulate matter distribution, based on climatic indicators during major dust storms in the State of Arizona

引用

Frontiers of Earth Science 2021年第1期15卷 133-150页

作者： Amin MOHEBBI Fan YU Shiqing CAI Simin AKBARIYEH edward J.SMAGLIK Department of Civil Engineering Construction Managementand Environmental EngineeringNorthern Arizona UniversityFlagstaffAZ 86011USA Department of Civil and Environmental Engineering California Polytechnic State UniversitySan Luis ObispoCA 93407USA

Arizona residents have been dealing with the suspended particulate matter caused health issues for a long time due to Arizona’s arid *** state of Arizona is vulnerable to dust stomas,especially in die monsoon season because of the anomalies in wind direction and *** this study,a high-resolution Weather Research and Forecasting(WRF)model coupled with a chemistry module(WRF-Chem)was simulated to compute the particulate matter spatiotemporal distribution as well as the climatic parameters for the state of ***,Ordinary Least Square(OLS),spatial lag,spatial error,and Geographically Weighted Regression(GWR)techniques were utilized to develop predictive models based on the climatic indicators that impacted the formation and dispersion of the particulate matter during dust *** tracts were adopted to create local spatial averages for the chosen *** height,temperature,wind speed,and vegetation fraction were designated as the most significant variables,whereas base state and perturbation pressures,planetary boundary layer height and soil moisture were adopted as supplementary *** determination coefficient for OLS,spatial lag,spatial error,and GWR models peaked at 0.92,0.93,0.96,and 0.97,*** models provide a better understanding of the current distribution of the particulate matter and can be used to forecast future trends.

关键词： particulate matter dust storm Weather Research and Forecasting census tracts Ordinary Least Square Geographically Weighted Regression

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

QTL analysis for ascorbic acid content in strawberry fruit reveals a complex genetic architecture and association with GDP-L-galactose phosphorylase

引用

Horticulture Research 2023年第3期10卷 136-150页

作者： Pilar Muñoz Cristina Castillejo JoséAntonio Gómez luis Miranda Silke Lesemann Klaus Olbricht Aurélie Petit Philippe Chartier Annika Haugeneder Johanna Trinkl Luca Mazzoni Agnieszka Masny edward Zurawicz Freya Maria Rosemarie Ziegler Björn Usadel Wilfried Schwab Béatrice Denoyes Bruno Mezzetti Sonia Osorio JoséFSánchez-Sevilla Iraida Amaya Centro IFAPA de Málaga Instituto Andaluz de Investigación y Formación Agraria y Pesquera(IFAPA)29140MálagaSpain PhD program in Advanced Biotechnology Universidad de Málaga29071MálagaSpain Finca el Cebollar Centro IFAPA las Torres04745HuelvaSpain Hansabred GmbH&Co.KG 01108DresdenGermany INVENIO 33800BordeauxFrance Biotechnology of Natural Products Technische Universität München85354FreisingGermany Dipartimento di Scienze Agrarie Alimentari e AmbientaliUniversitàPolitecnica delle Marche60131AnconaItaly Department of Horticultural Crop Breeding the National Institute of Horticultural ResearchKonstytucji 3 Maja 1/396-100SkierniewicePoland Institute of Bio-and Geosciences Bioinformatics(IBG-4)Forschungszentrum Jülich GmbH52428JülichGermany Univ.Bordeaux INRAEBiologie du Fruit et PathologieUMR 1332F-33140France Departamento de Biología Molecular y Bioquímica Instituto de Hortofruticultura Subtropical y Mediterránea"La Mayora"Universidad de Málaga-Consejo Superior de Investigaciones CientíficasCampus de Teatinos29071 MálagaSpain Unidad Asociada de I+D+i IFAPA-CSIC Biotecnología y Mejora en Fresa 29010MálagaSpain.

Strawberry(Fragaria×ananassa)fruits are an excellent source of L-ascorbic acid(AsA),a powerful antioxidant for plants and *** the genetic components underlying AsA accumulation is crucial for enhancing strawberry nutritional ***,we unravel the genetic architecture of AsA accumulation using an F1 population derived from parental lines‘Candonga’and‘Senga Sengana’,adapted to distinct Southern and Northern European *** account for environmental effects,the F1 and parental lines were grown and phenotyped in five locations across Europe(France,Germany,Italy,Poland and Spain).Fruit AsA content displayed normal distribution typical of quantitative traits and ranged five-fold,with significant differences among genotypes and *** content in each country and the average in all of them was used in combination with 6,974 markers for quantitative trait locus(QTL)*** stable QTLs for AsA content were detected in linkage group(LG)3A,LG 5A,LG 5B,LG 6B and LG *** genes were identified within stable QTL intervals and expression analysis in lines with contrasting AsA content suggested that GDP-L-Galactose Phosphorylase FaGGP(3A),and the chloroplast-located AsA transporter gene FaPHT4;4(7C)might be the underlying genetic factors for QTLs on LG 3A and 7C,*** show that recessive alleles of FaGGP(3A)inherited from both parental lines increase fruit AsA ***,expression of FaGGP(3A)was two-fold higher in lines with high *** here identified represent a useful resource for efficient selection of new strawberry cultivars with increased AsA content.

关键词： straw cultivar content

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：