检索结果-南通市图书馆

Green Hydrogen: Perspectives and Challenges in Using the Natural Gas Network in Ceará/Brazil

Journal of Geoscience and Environment Protection 2024年第3期12卷 70-94页

作者： Francisco Alfredo de castro Mona Lisa Moura de Oliveira Lutero Carmo de lima Daniel silveira Serra Science and Technology Center State University of Ceará Ceará Brazil Av. Dr. Silas Munguba 1700 Fortaleza-Ceará Brazil

Climate change, mainly caused by the use of non-renewable fuels, has raised global concerns and led to the search for less polluting energy sources, making hydrogen a promising energy alternative with the potential to contribute to changes in the energy mix of various countries through the use of technologies that enable its production and use with low or zero carbon emissions. In this context, Brazil has aroused great interest from other countries in exploring its renewable resources for the production of hydrogen (green hydrogen). In this sense, the use of natural gas pipelines and the use of hydrogen in mixtures with natural gas have become the subject of studies due to their economically viable alternative for the immediate use of this energy vector. However, there are still technical and regulatory challenges regarding the integration of hydrogen into the existing natural gas pipeline network. In this context, the present study aims to address the effects of hydrogen interaction with the structure of natural gas pipeline steel and the regulatory barriers to the use of this network for the transportation of green hydrogen, particularly in the state of Ceará/Brazil. After extensive analysis of literature and regulatory documents, it was concluded that: 1) Ceará/Brazil has strong potential to meet the demand for green hydrogen through the use of solar and wind energy sources;2) there is feasibility for the adaptation or conversion of natural gas infrastructure for the transportation of green hydrogen;3) discussions regarding the regulatory competence of green hydrogen transportation and distribution through the natural gas network in Brazil are still incipient;4) the current regulation of the natural gas industry can serve as a subsidy for the regulation of green hydrogen and natural gas transportation.

关键词： decarbonization Natural Gas Green Hydrogen Pipelines

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

Seasonal variation and host sex affect bat–bat fly interaction networks in the Amazonian savannahs

引用

Integrative Zoology 2024年第3期19卷 400-416页

作者： Paulo MEJIA Gustavo lima URBIETA Bruna da Silva XAVIER IsaíJorge de castro JoséJúlio de TOLEDO Gustavo GRACIOLLI Lucio AndréVIANA DIAS William Douglas CARVALHO Programa de Pós-Graduação em Biodiversidade Tropical Universidade Federal do Amapá(UNIFAP)MacapáAPBrazil Programa de Pós-Graduação em Ecologia Instituto de BiologiaCentro de Ciências da SaúdeUniversidade Federal do Rio de Janeiro(UFRJ)Rio de JaneiroRJBrazil Laboratório de Mamíferos Instituto de Pesquisas Científicas e Tecnológicas do Estado do Amapá(IEPA)MacapáAPBrazil Programa de Pós-Graduação em Biologia Animal Laboratório de SistemáticaEcologia e Evolução(LSEE)Instituto de BiociênciasUniversidade Federal de Mato Grosso do Sul(UFMS)Campo GrandeMTBrazil Terrestrial Ecology Group(TEG-UAM) Departamento de EcologíaFacultad de CienciasUniversidad Autónoma de MadridMadridSpain Centro de Investigación en Biodiversidad y Cambio Global(CIBC-UAM) Universidad Autónoma de MadridMadridSpain

Bats are the second-most diverse group of mammals in the world,and bat flies are their main ***,significant knowledge gaps remain regarding these antagonistic interactions,especially since diverse factors such as seasonality and host sex can affect their network ***,we explore the influence of such factors by comparing species richness and composition of bat flies on host bats,as well as specialization and modularity of bat–bat fly interaction networks between seasons and adult host *** captured bats and collected their ectoparasitic flies at 10 sampling sites in the savannahs of AmapáState,northeastern region of the Brazilian *** female bats being more parasitized and recording greater bat fly species richness in the wet season,neither relationship was statistically *** pooled network could be divided into 15 compartments with 54 links,and all subnetworks comprised>12 *** total number of links ranged from 27 to 48(for the dry and wet seasons,respectively),and female and male subnetworks had 44 and 41 links,*** values were very low for the pooled network and for all *** results revealed higher bat fly species richness and abundance in the wet season,whereas specialization and modularity were higher in the dry ***,the subnetwork for female bats displayed higher specialization and modularity than the male ***,both seasonality and host sex contribute in different ways to bat–bat fly network *** studies should consider these factors when evaluating bat–bat fly interaction networks.

关键词： Amapá Amazon biome bat flies bats interaction networks

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

Urea breath test for Helicobacter pylori infection in adult dyspeptic patients: A meta-analysis of diagnostic test accuracy

引用

World Journal of Gastroenterology 2024年第6期30卷 579-598页

作者： Fabian Fellipe Bueno Lemos Caroline Tianeze de castro Marcel Silva Luz Gabriel Reis Rocha Gabriel lima Correa Santos Luís Guilherme de Oliveira Silva Mariana Santos Calmon Cláudio lima Souza Ana Carla Zarpelon-Schutz Kádima Nayara Teixeira Dulciene Maria de Magalhães Queiroz Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil Instituto de Saúde Coletiva Universidade Federal da BahiaSalvador 40110040BahiaBrazil Campus Toledo Universidade Federal do ParanáToledo 85919-899ParanáBrazil Laboratory of Research in Bacteriology UFMGBelo Horizonte 30130-100Minas GeraisBrazil

BACKGROUND Helicobacter pylori(***)infection has been well-established as a significant risk factor for several gastrointestinal *** urea breath test(UBT)has emerged as a leading non-invasive method for detecting *** numerous studies confirming its substantial accuracy,the reliability of UBT results is often compromised by inherent *** findings underscore the need for a rigorous statistical synthesis to clarify and reconcile the diagnostic accuracy of the UBT for the diagnosis of *** *** To determine and compare the diagnostic accuracy of 13C-UBT and 14C-UBT for *** infection in adult patients with *** We conducted an independent search of the PubMed/MEDLINE,EMBASE,and Cochrane Central databases until April *** search included diagnostic accuracy studies that evaluated at least one of the index tests(^(13)C-UBT or ^(14)C-UBT)against a reference *** used the QUADAS-2 tool to assess the methodo-logical quality of the *** utilized the bivariate random-effects model to calculate sensitivity,specificity,positive and negative test likelihood ratios(LR+and LR-),as well as the diagnostic odds ratio(DOR),and their 95%confidence *** conducted subgroup analyses based on urea dosing,time after urea administration,and assessment *** investigate a possible threshold effect,we conducted Spearman correlation analysis,and we generated summary receiver operating characteristic(SROC)curves to assess ***,we visually inspected a funnel plot and used Egger’s test to evaluate publication *** both as reliable diagnostic tools in clinical *** In summary,our study has demonstrated that ^(13)C-UBT has been found to outperform the ^(14)C-UBT,making it the preferred diagnostic ***,our results emphasize the significance of carefully considering urea dosage,assessment timing,and measurement techniques for both tests to enh

关键词： Helicobacter pylori Urea breath test Diagnosis Diagnostic test accuracy Meta-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

Synthesis of coral-like structures of Pr-Yb co-doped YIG: Structural,optical, magnetic and antimicrobial properties

引用

Journal of Rare Earths 2024年第3期42卷 543-554,I0004页

作者： A.Fernandez Francisca P.Araujo Y.Guerra S.castro-Lopes J.Matilla-Arias Idglan S.de lima Edson C.Silva-Filho Josy A.Osajima F.Guerrero R.Pena-Garcia Federal University of Piau Graduate Program in Materials Science and EngineeringTeresinaPIBrazil Federal Rural University of Pernambuco Academic Unit of Cabo de Santo AgostinhoCabo de Santo AgostinhoPEBrazil Federal University of Piaui Department of PhysicTeresinaPBrazil Federal University of Pernambuco Graduate Program in Materials ScienceRecifePEBrazil University of Granma Departmentof Basic Sciences and Applied InformaticsFaculty of Technical SciencesBayamoCuba Federal University of Amazonas Department of PhysicManausAMBrazil Federal University of Pernambuco Department of PhysicRecifePEBrazil

Coral-like structures of the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal structure formation, without any secondary phase. It is shown that, the relatively large ionic radius of the dopant cations results in an expansion of the lattice parameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc-O bond distances and decrease in the average crystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-phase formation of YIG crystal structure and are observed changes in the stretching and vibrational modes, respectively. The morphological study, energy dispersive spectroscopy(EDS) spectra and textural properties show corallike structures, peaks associated with Pr^(3+) and Yb^(3+) atoms and the effect of dopants on surface area,diameter, and pore volume, respectively. The optical analysis from diffuse reflectance spectra witnessed an increase in the optical gap band, a decrease in Urbach energy and blue shift in the charge transfer,correlated with the expansion of the unit cell due to the dopant's insertion in the YIG structure. A typical ferrimagnetic behavior is exhibited by the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12)compound. The saturation magnetization(M_(s)), cubic anisotropy constant(K_(1)) and coercive field(H_(c)) increase with the Pr^(3+)cations content, as consequence of their magnetic nature and distribution around of Fe^(3+)ions due to the coexistence with the Yb^(3+). Finally, for the first time, antibacterial tests by mean of the direct contact method were performed for YIG co-doped with Pr^(3+)and Yb^(3+)and it is shown that, relatively high dosages of Pr^(3+) cations favored the activity against S. aureus, therefore, a new biological property for YIG doped with rare earths is presented.

关键词： Yttrium iron garnet(YIG) Coral-like structures Rare earths Band gap energy Magnetic properties Antimicrobial properties

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

Atmospheric Pollutants in a Commercial Region of Fortaleza, Ceará, Brazil: Integration of Health, Environment and Economy in Urban Planning to Improve Air Quality

引用

Journal of Geoscience and Environment Protection 2024年第5期12卷 92-112页

作者： Mônica Giovana Alves Cardoso Ratts Brenna Kessy Silva lima Gilvan Ribeiro dos Santos Fladimir de lima Gondim Rinaldo Santos Araújo Mona Lisa Moura de Oliveira Francisco Sales Ávila Cavalcante Daniel silveira Serra Science and Technology Center State University of Cear&#225 Cear&#225 Brazil department of Chemistry and Environment Federal Institute of Cear&#225 Cear&#225 Brazil Center of Technological Sciences State University of Cear&#225 Cear&#225 Brazil

The accelerated growth of the vehicular fleet, the modernization of large urban centers, and the few adjustments to the road network in Fortaleza have intensified the problems of traffic and emissions of atmospheric pollutants, highlighting the necessity for strategic urban planning initiatives to address the escalating issues of traffic and pollution. With the objective of analyzing the indices of concentrations of atmospheric pollutants and estimating how these levels can affect human health, this work consists of a study of the analysis of air quality in the intense trade region of Fortaleza. For this, the analysis zone was divided into three perimeters (Major - Medium - Minor), where each perimeter was analyzed at 7 am, 12 noon and 5 pm. Concentrations of the type of O3, particulate matter (PM2.5 and PM10), CO2 and HCHO were collected. Our results demonstrate that most of the analyses are within the limits of current legislation;however, at certain times and perimeters, the analyses of CO2 and HCHO exceeded the established limits. In view of the above, we conclude that public policies to control air quality are necessary to reduce the damage to human health and the environment caused by pollutants.

关键词： Air Quality Urban Planning Particulate Material Health Impacts

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

Nonsteroidal anti-inflammatory drug effectivity in preventing postendoscopic retrograde cholangiopancreatography pancreatitis: A systematic review and meta-analysis

引用

World Journal of Gastrointestinal Endoscopy 2020年第11期12卷 469-487页

作者： Juan Pablo Román Serrano JoséJukemura Samuel Galante Romanini Paúl Fernando Guamán Aguilar juliana silveira lima de castro Isabela Trindade Torres JoséAndres Sanchez Pulla Otavio Micelli Neto Eloy Taglieri JoséCelso Ardengh department of Gastroenterology University of Sao PauloSão Paulo 05403-000São PauloBrazil department of Gastrointestinal Endoscopy Service Hospital 9 de JulhoSão Paulo 01409002São PauloBrazil department of Gastroinestinal Catholic University of CuencaCuenca 010101Ecuador department of General Surgery Servidor Municipal HospitalSão Paulo 01532-001Brazil

BACKGROUND Endoscopic retrograde cholangiopancreatography(ERCP)is the primary therapeutic procedure for the treatment of diseases affecting the biliary tree and pancreatic *** the therapeutic success rate of ERCP is high,the procedure can cause complications,such as acute pancreatitis[post-ERCP pancreatitis(PEP)],bleeding and *** To assess the efficacy of non-steroidal anti-inflammatory drugs(NSAIDs)in preventing PEP during *** Databases such as MEDLINE,EMBASE and Cochrane Central Library were *** randomized controlled trials(RCTs)comparing the efficacy of NSAIDs and placebo for the prevention of PEP were *** evaluated included the incidence of PEP,severity of pancreatitis,route of administration,types,dose,and timing of administration of *** Twenty-six RCTs were considered eligible with a total of 8143 patients ***,4020 patients used NSAIDs before ERCP and 4123 did not use NSAIDs(control group).Ultimately,298 cases of post-ERCP acute pancreatitis were diagnosed in the NSAID group and 484 cases in the placebo *** risk of PEP was lower in the NSAID group risk difference(RD):-0.04;95%confidence interval(CI):-0.07 to-0.03;number needed to treat(NNT),25;Pderate PEP and severe PEP could not be fully *** rectal administration reduced the incidence of PEP with RD:-0.06;95%CI:-0.08 to-0.04;NNT,17;Pdeveloping mild *** RCTs are needed to compare the efficacy between NSAID routes of administration in preventing PEP.

关键词： Pancreatitis Endoscopic retrograde cholangiopancreatography Diclofenac Indomethacin Rectal

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

COMBINING SINGULAR SPECTRUM ANALYSIS AND PAR(p) STRUCTURES TO MOdeL WIND SPEED TIME SERIES

引用

Journal of Systems Science & Complexity 2014年第1期27卷 29-46页

作者： MENEZES Moises lima de SOUZA Reinaldo castro PESSANHA Jos Francisco Moreira department of Statistics Fluminense Federal University ( UFI~ Brazil. Email: moisesAima@msn.com.SOUZA Reinaldo Castro Electrical Engineering department: Pontifical Catholic University of Rio de Janeiro (PUC-Rio) Brazil. Institute of Mathematics and Statistics State University of Rio de Janeiro (UERJ) Brazil.

单个光谱分析(SSA ) 是分解一时间的一种技术系列进一套部件，例如，趋势，泛音，和剩余。省掉剩余部件并且将其它，加起来时间系列能被弄平。这个过程被用来为巴西电消费和流动系列建模。同等(p) ，周期的 autoregressive 模型，广泛... 详细信息

单个光谱分析(SSA ) 是分解一时间的一种技术系列进一套部件，例如，趋势，泛音，和剩余。省掉剩余部件并且将其它，加起来时间系列能被弄平。这个过程被用来为巴西电消费和流动系列建模。同等(p) ，周期的 autoregressive 模型，广泛地在巴西在建模精力系列被使用了。这份报纸论述这个分解方法的一条途径，由适合 PAR (p) ，就它作为 multivariate SSA (MSSA ) 知道的 multivariate 版本而言。方法被用于在巴西东北区域在二个地点记录的二个风速度系列的向量。，与每个系列的 univariate 分解相比获得了结果，是远优异的，证明在二个系列之间的空间关联被 MSSA 分解舞台考虑。

关键词：奇异谱分析 PAR 风速结构时间序列分解方法自回归模型东北部地区

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

Effectiveness of Helicobacter pylori eradication in the treatment of early-stage gastric mucosa-associated lymphoid tissue lymphoma:An up-to-date meta-analysis

引用

World Journal of Gastroenterology 2023年第14期29卷 2202-2221页

作者： Fabian Fellipe Bueno Lemos Caroline Tianeze de castro Mariana Santos Calmon Marcel Silva Luz Samuel Luca Rocha Pinheiro Clara Faria Souza Mendes dos Santos Gabriel lima Correa Santos Hanna Santos Marques Henrique Affonso delgado Kádima Nayara Teixeira Cláudio lima Souza Márcio Vasconcelos Oliveira Fabrício Freire de Melo Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029094BahiaBrazil Instituto de Saúde Coletiva Universidade Federal da BahiaSalvador 40110040BahiaBrazil Campus Vitória da Conquista Universidade Estadual do Sudoeste da BahiaVitória da Conquista 45029094BahiaBrazil Campus Toledo Universidade Federal do ParanáToledo 85919899ParanáBrazil

BACKGROUND Gastric mucosa-associated lymphoid tissue(MALT)lymphoma(GML)is usually a low-grade B-cell neoplasia strongly associated with Helicobacter pylori(***)-induced chronic *** practice guidelines currently recommend *** eradication as the preferred initial treatment for early-stage *** determine the practical effect of bacterial eradication as the sole initial therapy for early-stage GML,an updated analysis and review of available evidence is *** To perform a meta-analysis to assess the rate of complete remission(CR)of ***-positive early-stage GML following bacterial *** We performed independent,computer-assisted literature searches using the PubMed/MEDLINE,Embase,and Cochrane Central databases through September *** and retrospective observational studies evaluating the CR of early-stage GML following bacterial eradication in ***-positive *** risk of bias was assessed using Joanna Briggs Institute(JBI)Critical Appraisal *** pooled estimate of the complete histopathological remission rate and respective confidence intervals(95%CI)were calculated following the random-effects *** and inconsistency were assessed using Cochran’s Q test and I2 statistic,and heterogeneity was defined as P50%,*** and meta-regression analyses were conducted to explore potential sources of *** The titles and abstracts of 1576 studies were screened;96 articles were retrieved and selected for full-text ***,61 studies were included in the proportional meta-analysis(P-MA).Forty-six were prospective and fifteen were retrospective uncontrolled,single-arm,observational *** overall risk of bias was low to moderate in all but a single report,with an average critical appraisal score across all studies of 79.02%.A total of 2936 ***-positive early-stage GML patients,in whom *** was successfully eradicated,were incl

关键词： Lymphoma B-cell Marginal zone Gastric mucosa-associated lymphoid tissue lymphoma Stomach lymphoma Helicobacter pylori Therapeutics Eradication therapy

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

Complex derivatives valuation: applying the Least-Squares Monte Carlo Simulation Method with several polynomial basis

引用

Financial Innovation 2016年第1期2卷 1-14页

作者： Ursula silveira Monteiro de lima Carlos Patricio Samanez department of Industrial Engineering Pontifical Catholic University of Rio de JaneiroMarquês de São Vicente Street225/22453-900 GáveaRio de JaneiroBrazil

Background:This article investigates the Least-Squares Monte Carlo Method by using different polynomial basis in American Asian Options *** standard approach in the option pricing literature is to choose the basis *** comparing four different polynomial basis we show that the choice of basis interferes in the option's ***:We assess Least-Squares Method performance in pricing four different American Asian Options by using four polynomial basis:Power,Laguerre,Legendre and Hermite *** every American Asian Option priced,three sets of parameters are used in order to evaluate it ***:We show that the choice of the basis interferes in the option's price by showing that one of them converges to the option's value faster than any other by using fewer simulated *** the case of an Amerasian call option,for example,we find that the preferable polynomial basis is Hermite *** an Amerasian put option,the Power polynomial basis is *** empirical outcome is theoretically unpredictable,since in principle all basis can be indistinctly used when pricing the ***:In this article The Least-Squares Monte Carlo Method performance is assessed in pricing four different types of American Asian Options by using four different polynomial basis through three different sets of *** results suggest that one polynomial basis is best suited to perform the method when pricing an American Asian *** all basis can be indistinctly used when pricing the ***,our results does not confirm *** find that when pricing an American Asian put option,Power A is better than the other basis we have studied here whereas when pricing an American Asian call,Hermite A is better.

关键词： Complex derivatives valuation Least-Squares Monte Carlo Method Amerasian options Polynomial basis

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

Integrated risk management: a Petrobras application in offshore well construction safety to minimize critical emergency disconnections

引用

Petroleum Science 2018年第2期15卷 421-431页

作者： Claudio Benevenuto de Campos lima Pedro Esteves Aranha Jose Francisco Tebaldi de castro Gilson Brito Alves lima Augusto Borella Hougaz Felipe de Souza Terra Petrobras department of Production Engineering Federal Fluminense University

In order to avoid mistakes and to save a great deal of time in analysis, an innovative methodology was developed that can analyze the well operations and rig characteristics involved to define the best emergency disconnect sequence （EDS） available. A solution was developed based on the characteristics of the rigs and blowout preventers （BOPs）, and six variables were considered that directly affect the choice of EDS. All possible combinations of 64 scenarios were analyzed, and the priority of choice of the EDS was defined empirically. This paper presents an approach to EDS risk management and examples of exposure time （time without riser safety margin and shear capability） for the same well, which can be lowered from 13% to 0.1%. The impact of this reduction is related to the ability of the BOP to cut some of the heavy casings, in addition to improved availability of EDS modes. This implementation opened up many possibilities for the performance of risk exposure analysis, enabling comparison of several BOP configurations of contracted rigs and selection of the best options. This innovative approach allowed a better management of the rig schedules, prioritizing safety aspects and making it possible to allocate the fleet in a systematic way.

关键词： Well safety Safety barriers Emergency disconnect sequence (EDS) Well control Kick Well design

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

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：