检索结果-南通市图书馆

Water Quality and the Impact by Contaminants of Emerging Concern: The Case of Verde River in Campos Gerais

Journal of Water Resource and Protection 2022年第11期14卷 740-757页

作者： Renato Itamar Duarte da Fonseca Juliana Aparecida da Silva karine andréa costa Gabrielle Delfrate Egon Chiquito de Castro Rosilene Prestes Sheisa Fin Dantas Sierpinski Adriano Gonçalves Viana Elizabeth Weinhardt O. Scheffer State University of Ponta Grossa Ponta Grossa Brazil Federal University of Technology Ponta Grossa Brazil

In this article, we report the results of the work carried out on the Verde River, a predominantly urban river located in the city of Ponta Grossa, Paraná, Brazil. Developed in three stages, it aimed to evaluate the water quality through physical-chemical parameters, the presence of caffeine as a chemical tracer, and the compound Triclosan (TCS), considered a pollutant of emerging concern. An attempt was made to identify possible polluting sources along the river. Samples were collected at 4 points from the spring region, with sampling upstream and downstream of a Sewage Treatment Plant (STP). The physical-chemical parameters were determined in situ, through portable analysers, as well as in the laboratory, in this case, through analyses using molecular absorption spectroscopy. For the determination of TCS and Caffeine, high-performance liquid chromatography (HPLC) was used, preceded by a pre-concentration step in the solid phase (SPE), and the techniques were implemented after validation. The physicochemical evaluations of the surface samples showed a decline in water quality after the STP. Mean total phosphorus concentrations of 1.0 mg·L-1 (±0.4), as well as dissolved oxygen (DO) levels below 5.0 mg·L-1 were verified downstream of the STP. Caffeine concentrations for Verde River were between 49.0 to 299.0 μg·L-1, verified upstream and downstream of the STP. The results demonstrated the relationship between the presence of caffeine and impaction, either by the input of raw sewage or by treated effluent. TCS was detected by chromatographic analysis, downstream of the STP, with an average concentration of 27.6 (±1.7) μg·L-1, noting that its presence was associated with the reactor maintenance procedure, with the STP in the process called bypass. Obtaining quality data from Verde River is important for the protection of the environment and affects the health of the population.

关键词： Surface Water Micropollutants Triclosan

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

Influence of working gas pressure on the performance of W/Si multilayers

引用

Chinese Physics C 2012年第9期36卷 909-914页

作者：王芳芳朱京涛钟奇王占山 Philippe Jonnard karine Le Guen Jean-Michel andré Michel Fialin Institute of Precision Optical Engineering Department of PhysicsTongji University Laboratoire Chimie Physique-Matière Rayonnement UPMC Univ Paris 06CNRS UMR 761411 rue Pierre et Marie CurieF-75231 Paris Cedex 05France Centre CAMPARIS CNRS UMR 7154campus Jussieu4 place JussieuF-75254 Paris Cedex 05France

The effect of Ar pressure on the performance of W/Si multilayers is investigated. W/Si multilayers were deposited by a high vacuum DC magnetron sputtering system. The Ar pressure was changed from 1.0 to 5.0 mTorr with an interval of 1.0 mTorr during the deposition process. Electron probe microanalysis and Rutherford backscattering are performed to determine the Ar content incorporated within these multilayers. The results demonstrate that less Ar is incorporated within the sample when more Ar is used in the plasma, which could be explained by the increase of the collision probability and the decrease in the kinetic energy of Ar ions arriving at the substrate when more Ar exists. The grazing incident X-ray reflectivity （GIXR） at 0.154 nm is used to determine the structural parameters of the layers. The results show that the structures of these multilayers prepared at different Ar pressure are very similar and that the interface roughness increases quickly when the Ar pressure is higher than 3.0 mTorr. The measurements of the extreme ultraviolet （EUV） reflectivity indicate that the reflectivity decreases when Ar pressure increases. The fitting results of GIXR and EUV refiectivity curves indicate that with an increase of Ar pressure, the density and decrement of the refractive index are increased for W and decreased for Si, which is mainly due to （1） the decrease in Ar content incorporated within these multilayers which affects their performance and （2） the increase of collision probability for sputtered W and Si, the decrease of their average kinetic energy arriving at the substrate, and thus the loosing of their layers.

关键词： multilayer deposition working pressure EPMA RBS reflectivity

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

Understanding bark thickness variations for Araucaria angustifolia in southern Brazil

引用

Journal of Forestry Research 2021年第3期32卷 1077-1087页

作者： Emanuel Arnoni costa Veraldo Liesenberg César Augusto Guimaraes Finger andréFelipe Hess Cristine Tagliapietra Schons Graduate Program in Forest Engineering Santa Catarina State University(UDESC)LagesSC 88520-000Brazil Department of Forest Engineering Federal University of Uberlandia(UFU)Monte CarmeloMG 38500-000Brazil Graduate Program in Forest Engineering Federal University of Santa Maria(UFSM)Santa MariaRS 97105-900Brazil Graduate Program in Agroecosystems Federal Technological University of Parana(UFTPR)Dois VizinhosPR 85660-000Brazil

This study aimed to understand bark thickness variations of Araucaria angustifolia(Bertol.)Kuntze trees growing in natural forest remnants in southern Brazil,and their relationship with quantitative and qualitative *** thickness must be accurately estimated in order to determine timber volume *** is an important variable for the sustainable management and conservation of araucaria *** spite of its importance and visibility,bark thickness variations have not been evaluated for this key species in southern Brazil.A total of 104 trees were selected,and their qualitative and quantitative attributes such as diameter at breast height(D_(BH)),height(H),crown base height(C_(BH)),crown length(C_(L)),social position(S_(P)),stoniness(S_(T)),position on the relief(P_(R)),vitality(V_T)and branch arrangement(B_(A))were *** trees were categorized into two groups:red bark or gray *** analysis and artificial neural networks(ANN)were used for modelling bark *** results indicate that:(1)bark thickness showed good correlation to D_(BH),with 0.76 as coefficient of determination(RS_P),0.540 as Mean Absolute Error(M_(AE))and 22.4 root-meansquare error in percentage(R_(MSE%));(2)the trend changed according to bark colour,with significant differences for the intersection(_0–Pr>F:p=0.0124)and slope(β_(1)–Pr>F:p=0.0126)of bark thickness curves between groups;(3)the highest correlation of bark thickness was found with:D_(BH)(ρ=0.88),H(ρ=0.58),C_(BH)(ρ=0.46),S_(P)(ρ=-0.52),and B_(A)(ρ=-0.32);(4)modelling with ANN confirmed high adjustment(R^(2)=0.99)and accuracy(R_(MSE%)=3.0)of the *** is an efficient and robust technique for the modelling of various qualitative and quantitative attributes commonly used in forest *** effective use of ANN to estimate araucaria bark in natural forests reinforces its potential,besides the possibility of application for other forest species.

关键词： Dendrometry attributes Crown characteristics Prediction models Bark factor Parana-pine

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

Notes on the Established-Outsiders Figuration:A Psychoanalytical Approach

引用

Psychology Research 2018年第2期8卷 53-59页

作者： andré Oliveira costa University of Sao Paulo(USP) Sao PauloBrazil The Sao Paulo Research Foundation(FAPESP-2015/0489-7) Sao PauloBrazil

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

Management of bone metastases in renal cell carcinoma: bone-targeted treatments, systemic therapies, and radiotherapy

引用

Journal of Cancer Metastasis and Treatment 2021年第1期7卷 628-639页

作者： andréMansinho Priscila Nejo Tito Leitão Sandra Casimiro Luís costa Serviço de Oncologia Médica Centro Hospitalar Universitário Lisboa NorteHospital de Santa MariaLisboa 1649-035Portugal Luis costa Laboratory Instituto de Medicina MolecularFaculdade de Medicina da Universidade de LisboaLisboa 1649-035Portugal Instituto Português de Oncologia Lisboa Francisco Gentil Lisboa 1649-035Portugal Urology Department Centro Hospitalar Universitário Lisboa NorteHospital de Santa MariaLisboa 1649-035Portugal

Metastatic renal cell carcinoma(mRCC)presents with bone metastases in around 20%-30%of patients enrolled in the most recent first-line clinical *** of several new agents in first line,in both monotherapy and combination,has significantly improved patient ***,the activity of such agents on bone metastases is unclear and management of these patients is complex,due to potential complications that can significantly impair quality of *** review addresses mRCC diagnosis and monitoring and summarizes the current evidence on systemic therapy,ablative therapies such as stereotactic ablative radiotherapy and surgery,and supportive therapy with bone-targeting agents for these patients,with the goal of improving their outcomes.

关键词： Bone metastases renal cell carcinoma bone targeted treatments radiotherapy systemic 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

Violence and Discontents:Ruptures of the Relationship between Individual and Society

引用

Psychology Research 2018年第3期8卷 87-95页

作者： andré Oliveira costa University of Sao Paulo (USP) Sao Paulo Brazil Sao Paulo Research Foundation (FAPESP-2015/04897-0) Sao Paulo Brazil

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

Getting ready for the next inforuses

引用

hLife 2024年第2期2卷 94-95页

作者： andrécosta Lobato Institute of Economics Federal University of Rio de JaneiroRio de JaneiroBrazil

With the end of Corona Virus Disease 2019(COVID-19)as a global health emergency in May 2023[1],experts can now meet face-to-face to discuss what people were saying and doing behind the keyboards during our first global‘paninfodemic’,the term used to describe the abundance of information[2],helpful or dangerous,during a disease outbreak.

关键词： global info

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

Setpoint Feasibility and Stability of Wind Park Control Interactions at Weak Grids

引用

Journal of Modern Power Systems and Clean Energy 2022年第6期10卷 1790-1796页

作者： Argüello andrés IEEE the School of Electrical Engi‐neering and Computation University of CampinasCampinasBrazil

The controllers of wind parks that are connected to weak grids can induce unstable oscillations near the fundamental *** phenomenon can be studied with equivalent impedances of the wind generators,which depend on their operational setpoints at the fundamental *** feasibility of such setpoint,i.e.,solution to the power flow,does not depend on the control ***,oscillations from unfeasible setpoints and control instabilities both occur at weak grids and near the fundamental *** letter presents an exploratory study to map the conditions where both phenomena occur,using sensitivity studies comprising multiple setpoints and control parameter *** results are visually presented as the regions which inform the configurations leading to unfeasible setpoints,and unstable control interaction *** the results,it can be observed that the trajectory of the eigenvalues in the Nyquist plots towards an unfeasible setpoint approaches a fundamental frequency instability.

关键词： Control interaction impedance power quality resonance stability wind generator

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

Numerical Study on the Effect of Submerged Depth on the Horizontal Plate Wave Energy Converter

引用

China Ocean Engineering 2014年第5期28卷 687-700页

作者： Flávio Medeiros SEIBT Eduardo costa COUTO Elizaldo Domingues dos SANTOS Liércio andré ISOLDI Luiz Alberto Oliveira ROCHA Paulo Roberto de Freitas TEIXEIRA Graduate Program of Ocean Engineering Universidade Federal do Rio Grande96203-900 Rio Grande RS Brazil Mechanical Engineering Department Universidade Federal do Rio Grande do Sul90050-170 Porto Alegre RS Brazil

The growing search for clean and renewable energy sources has given rise to the studies of exploring sea wave energy. This paper is concerned with the numerical evaluation of the main operational principle of a submerged plate employed for the conversion of wave energy into electrical one. The numerical model used to solve the conservation equations of mass, momentum and transport of volume fraction is based on the finite volume method （FVM）. In order to tackle with the flow of mixture of air-water and its interaction with the device, the multiphase model volume of fluid （VOF） is employed. The purpose of this study is the evaluation of a numerical model for improvement of the knowledge about the submerged plate wave energy converter, as well as the investigation of the effect of the distance from the plate to the bottom of the sea （HP） on the performance of the converter. The simulations for several distances of the plate from the seabed show that the optimal efficiency is 64%, which is obtained for HP=0.53 m （88% of the depth）. This efficiency is 17% larger than that found in the worst case （HP=0.46 m, 77% of the depth）.

关键词： numerical simulation submerged plate wave energy conversion efficiency

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

Record of Early Tonian mafic magmatism in the central Espinhaco(Brazil):New insights for break-up of the Neoproterozoic landmass ancestor of Sao Francisco-Congo paleocontinent

引用

Geoscience Frontiers 2020年第6期11卷 2323-2337页

作者： Helen F.Moreira andréDanderfer Alice F.O.costa Samuel M.Bersan Cristiano C.Lana Gláucia N.Queiroga Post Graduate Program of Department of Geology Mine SchoolFederal University of Ouro PretoBrazil Department of Geology Mine SchoolFederal University of Ouro PretoBrazil

Petrological characterization,U-Pb geochronology,Lu-Hf analyses and major and trace element data from mafic intrusions in the Central Espinhaco(central portion of the Brazilian shield)are used here to investigate the geological significance of the Early Neoproterozoic magmatism in the context of the Sao Francisco-Congo *** mafic bodies are represented by medium to coarse-grained metagabbros with plagioclase,amphibole and *** U-Pb isotopic data from two samples yielded weighted mean 206pb/238U ages of 895±3.4 Ma(MSWD=1.7)and 896±2.4 Ma(MSWD=0.64),regarded as the best estimates for the crystallization age of these mafic *** and trace element data(including REEs)show that the gabbros originated from a subalkaline tholeiitic magma,typical of intraplate *** rocks are slightly enriched in LREEs and LILEs and depleted in *** new isotope and geochemical data,along with regional knowledge,indicate that these metagabbros mark the beginning of an important Tonian-age extensional tectonic event of the landmass of which the Sao Francisco-Congo paleocontinent was part(Rodinia supercontinent or Central African block?).We furthermore suggest that these rocks belong to a prominent suite of Tonian-age mafic rocks that mark a diachronic breakup attempt of this landmass which may have occurred from south to north along the Espinhaco mountain range.

关键词： Mafic rocks Espinhaco basin Sao Francisco-Congo paleocontinent Tonian rifting U–Pb geochronology

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：