检索结果-南通市图书馆

Optimisation of chemical purification conditions for direct application of solid metal salt coagulants:Treatment of peatland-derived diffuse runoff

引用

Journal of Environmental Sciences 2013年第4期25卷 659-669页

作者： elisangela heiderscheidt Jaakko Saukkoriipi Anna-Kaisa Ronkanen Bjφrn Klφve Water Resources and Environmental Engineering Laboratory Department of Process and Environmental Engineering90014 University of OuluFinland Finnish Environment Institute(SYKE) Freshwater CentreMonitoring and AssessmentP.O.Box 413FI-90014University of OuluFinland

The drainage of peatland areas for peat extraction, agriculture or bioenergy requires affordable, simple and reliable treatment methods that can purify waters rich in particulates and dissolved organic carbon. This work focused on the optimisation of chemical purification process for the direct dosage of solid metal salt coagulants. It investigated process requirements of solid coagulants and the influence of water quality, temperature and process parameters on their performance. This is the first attempt to provide information on specific process requirements of solid coagulants. Three solid inorganic coagulants were evaluated： aluminium sulphate, ferric sulphate and ferric aluminium sulphate. Pre-dissolved aiuminium and ferric sulphate were also tested with the objective of identifying the effects of in-line coagulant dissolution on purification performance. It was determined that the pre-dissolution of the coagulants had a significant effect on coagulant performance and process requirements. Highest purification levels achieved by solid coagulants, even at 30% higher dosages, were generally lower （5%-30%） than those achieved by pre-dissolved coagulants. Furthermore, the mixing requirements of coagulants pre-dissolved prior to addition differed substantially from those of solid coagulants. The pH of the water samples being purified had a major influence on coagulant dosage and purification efficiency. Ferric sulphate （70 mg/L） was found to be the best performing solid coagulant achieving the following load removals： suspended solids （59%-88%）, total organic carbon （56%-62%）, total phosphorus （87%-90%）, phosphate phosphorus （85%-92%） and total nitrogen （33%-44%）. The results show that the use of solid coagulants is a viable option for the treatment of peatland-derived runoff water if solid coagulant-specific process requirements, such as mixing and settling time, are considered.

关键词： inorganic solid coagulant peatland runoff mixing chemical purification nutrients humic substances

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

Soil texture prediction through stratification of a regional soil spectral library

引用

Pedosphere 2022年第2期32卷 294-306页

作者： José Janderson Ferreira COSTA élvio GIASSON elisangela Benedet DA SILVA Tales TIECHER Antonny Francisco Sampaio DE SENA Ryshardson Geovane Pereira de Oliveira E SILVA Department of Soil Science Faculty of AgronomyUniversity of Rio Grande do SulBento Gonçalves Avenue 7712Porto Alegre 91540-000Brazil Agricultural Research and Rural Extension Corporation of Santa Catarina Rodovia Admar Gonzaga 1347FlorianópolisSanta Catarina 88034-901Brazil

Knowing the spatial distribution of soil texture,which is a physical property,is essential to support agricultural and environmental decision *** texture can be estimated using visible,near infrared,and shortwave infrared(Vis-NIR-SWIR)***,the performance of spectroscopic models is variable because of soil ***,few studies address the effects of soil sample variability on the performance of the models,especially for larger spectral libraries that include soils that are more ***,the objectives of this study were to:i)apply Vis-based color parameters on the stratification of a regional soil spectral library;ii)evaluate the performance of the predictive models generated from the spectral library stratification;iii)compare the performance of stratified models(SMs)and the model without stratification(WSM),and iv)explain possible changes in prediction accuracy based on the ***,a regional soil spectral library with 1535 samples from the State of Santa Catarina,Brazil was *** reflectance data were obtained by Vis-NIR-SWIR spectroscopy in the laboratory using a spectroradiometer covering the 350–2500 nm spectral ***,silt,and clay fractions were determined using the pipette ***-two components of color parameters were derived from the Vis spectrum using the colorimetric models.A cubist regression algorithm was used to assess the accuracy of the applicability of the initial models(SMs and WSM)and of the validation between the *** order derivatives(FODs)at 0.5,1.5,and 2 intervals were used to explain possible changes in the performance of the *** SMs with higher contents of clay and iron oxides obtained the highest accuracy,and the most important spectral bands were identified,mainly in the 480–550 and 850–900 nm ranges and the 1400,1900,and 2200 nm ***,stratification of soil spectral libraries is a good strategy to improve regional assessments of soil resou

关键词： color parameters cubist regression fractional order derivatives soil spectroscopy spectroscopic model stratified model Vis-NIR-SWIR

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

Alternative uses for tannery wastes:a review of environmental,sustainability,and science

引用

Journal of Leather Science and Engineering 2020年第1期2卷 249-268页

作者： Cesar Vinicius Toniciolli Rigueto Marieli Rosseto Daniela Dal Castel Krein Bruna elisangela Pessini Ostwald Lillian Avila Massuda Barbara Belem Zanella Aline Dettmer Postgraduate Program in Food Science and Technology(PPGCTA) University of Passo Fundo(UPF)Faculty of Agronomy and Veterinary Medicine(FAMV)Passo FundoRSBrazil Chemical Engineering Course University of Passo Fundo(UPF)Faculty of Engineering and Architecture(FEAR)Passo FundoRSBrazil

The manufacture of leather covers a wide productive chain and beyond contributes to the economic *** various stages of leather processing result in high volumes of solid *** Brazil,a daily generation of 375 tons of solid waste is estimated,and landfills are still the most used route to its *** this review,emphasis will be given to researches that have sought alternatives for the use of solid waste from the tannery *** the main applications of solid tannery wastes,the following stand out production of adsorbent materials,biodiesel,biogas,biopolymers,applications in agriculture and other applications involving extraction/recovery of compounds of industrial/commercial interest,isolation of microorganisms and production of enzymes and applications in the animal *** each alternative of waste application,the technologies used,the opportunities,and the challenges faced are *** hope that this review can provide valuable information to promote the broad understanding of the possibilities that tannery solid wastes has for the development of biodegradable and agricultural products,wastewater treatment,extraction of compounds of industrial and commercial interest,among others.

关键词： Leather Adsorption Biodiesel Biogas Biopolymers Agriculture

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

Analysis of the Energy Efficiency of Diesel Oil Consumption in the Brazilian Iron Ore Mining Company

引用

Journal of Power and Energy Engineering 2018年第11期6卷 23-39页

作者： Eunírio Zanetti Fernandes elisangela Martins Leal Robson Lage Figueiredo Gemírson de Paula dos Reis VALE Technological Institute Ouro Preto Minas Gerais Brazil Department of Mechanical Engineering School of Mining Federal University of Ouro Preto Minas Gerais Brazil Graduate Program in Instrumentation Control and Automation of Mining Processes School of Mining Federal University of Ouro Preto Minas Gerais Brazil

This paper aims to evaluate the diesel oil consumption between 2008 and 2015 in the production of iron ore in Brazil, creating correlations between energy intensity (production), economy and checking the impact of fuel prices on the commodity. During the analyzed period, the years 2008-2009 indicated economic crises, which interfered in the price and the commercialization of iron ore products. The physical intensity was 0.2% higher than the economic intensity. In the period from 2010 to 2014, economic activity remained more stable, with a decreasing trend, mainly due to the increase of iron ore prices. The physical intensity is much higher than the economic intensity influenced by the expansion of the Chinese economy. The year of 2014 indicated the end of the high iron ore price cycle and the beginning of supply and demand stabilization with consequent reduction in prices. In 2015, the market entered the stabilization phase, with a continuous reduction in unit production costs and transportation logistics. There was an abrupt change due to the strong increase of the economic intensity due to the fall of the international prices of iron ore. The diesel oil consumption plays a vital role in the scenario of cost reduction in iron ore production and a deeper analysis must be done in order to discover some options to change the energy matrix.

关键词： Mining Iron Ore Diesel Oil Consumption Energy Analysis Economic 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

The Use of Solid State NMR to Evaluate the Carbohydrates in Commercial Coffee Granules

引用

Food and Nutrition Sciences 2011年第4期2卷 350-355页

作者： Regina Freitas Nogueira elisangela Fabiana Boffo Maria Inês Bruno Tavares Leonardo AMoreira Leila Aley Tavares Antonio Gilberto Ferreira Departamento de Química da Universidade Federal de Sao CarlosSao CarlosBrasil Institutito de Macromoléculas Universidade Federal do Rio de JaneiroRio de JaneiroBrasil Escola Técnica Federal de Minas GeraisBrasil

Coffee brings many health benefits due to its chemical constituents. Based on this information, it is essential to know the main chemical compounds from coffee granules;the intermolecular interaction among the coffees compounds and the molecular components homogeneity. In this study six types of roasted commercial coffee were evaluated by solid state nuclear magnetic resonance (NMR), employing carbon-13 (13C) and hydrogen (1H) nucleus. Carbon-13 was analyzed applying high field NMR techniques, such as: magic angle spinning (MAS);magic angle spinning with cross-polariza- tion (CPMAS) and magic angle spinning with cross-polarization and dipolar dephasing (CPMASDD). The hydrogen was evaluated via relaxation times. Proton spin-lattice relaxation time in the rotating frame was deter-mined through the carbon-13 decay, during the variable contact-time experiment, using high field NMR. Proton spin-lattice relaxation time was determined through the inversion-recovery pulse sequence, using low field NMR. Considering all NMR results, it was concluded that the major coffee compounds are: a) triacilglycerides, which constitute the mobile region in the granule coffee and b) Carbohydrates such as: polysaccharides and fibers that belong to the rigid domain. These constituents belong to different molecular mobility domain, although they have strong intermolecular interactions due to the granule organization.

关键词： Solid State NMR Coffee

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

Cytokine profiles in sickle cell anemia:Pathways to be unraveled

引用

Advances in Bioscience and Biotechnology 2013年第7期4卷 6-12页

作者： Thassila Nogueira Pitanga Wendell Vilas-Boas Bruno Antonio Veloso Cerqueira Magda Oliveira Seixas Cynara Gomes Barbosa elisangela Vitoria Adorno Marilda Souza Goncalves Centro de Pesquisas Goncalo Moniz Fundacao Oswaldo CruzSalvadorBrasil Instituto de Ciencia e Tecnologia do Sangue CampinasBrasil Universidade Estadual de Santa Cruz IlheusBrasil Faculdade de Farmacia da Universidade Federal da Bahia SalvadorBrasil

Sickle cell anemia (SCA) is a genetically inherited hemolytic disorder characterized by chronic inflammation. Cytokine expression affects the pivotal pathways that contribute to disease pathogenesis, but the mechanisms involved are not well understood. SCA is associated with a proinflammatory state, and an enhanced inflammatory response occurs during vasoocclusive crisis. The immune system thus plays an important role in this inflammatory condition, with several cell types secreting pro-inflammatory cytokines that contribute to the occurrence of common cyclical events in SCA patients, such as hemolysis, vascular occlusion and inflammation. Studies of these cytokines and chemokines in SCA patients have clarified the mechanisms that underlie this disease and highlighted the need for a better understanding of cytokine participation in SCA pathophysiology.

关键词： Sickle Cell Anemia Cytokines Chemokine Inflammation Inflammasome

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

Sickle cell disease:Only one road,but different pathways for inflammation

引用

Advances in Bioscience and Biotechnology 2012年第4期3卷 538-550页

作者： Wendell Vilas-Boas Bruno Antonio Veloso Cerqueira Thassila Nogueira Pitanga Magda Oliveira Seixas Joelma Menezes Cyntia Cajado de Souza elisangela Vitoria Adorno Marilda Souza Goncalves Centro de Pesquisas Goncalo Moniz Fundacao Oswaldo Cruz(FIOCRUZ)SalvadorBahiaBrasil Instituto Nacional de Ciencia e Tecnologia do Sangue Sao PauloBrasil Universidade Estadual de Santa Cruz(UESC) IlheusBahiaBrasil Faculdade de Farmacia da Universidade Federal da Bahia(UFBA) SalvadorBahiaBrasil

Sickle cell disease (SCD) is a genetic disorder characterized by a chronic inflammatory process, and new biomarkers have been studied as promising molecules for understanding the inflammation in its pathophysiology. The hemolysis and the release of molecules associated to the hemoglobin (Hb) catabolism, such as free Hb, iron, and heme, generating a oxidant environment with production of reactive oxygen and nitrogen species. The immune system plays a very important role in the inflammation, with cells secreting pro-inflammatory cytokines and chemokines. There is also a nitric oxide (NO) resistance state, with an impaired NO bioactivity, leading to a vascular dys-function;activation of platelet, leukocytes, erythrocytes, and endothelial cells, with expression of adhesion molecules and its ligands, and several receptors, that altogether participate at inflammatory process. During inflammation, there is an increase of dendritic cells (DCs) expresse toll like receptors (TLR), but the role of DCs and TLR in SCD pathogenesis is unclear. Also, there are molecules contributing for enhance the endothelium dysfunction, such as homocysteine that has been associated with vascular complications in the pathology of other diseases and it may contribute to the vascular complications presented by SCD patients. Circulating microparticules (MPs) levels are augmented in several diseases and have been described in SCD, where cells membrane compounds are associated to cell’s thrombotic and coagulation state, such as tissue factor and phosphatidylserine (PS), which may contribute to endothelial dysfunction. The knowledge of all these biomarkers may contribute to new therapeutic approach discover, improveing SCD patient life quality.

关键词： Sickle Cell Disease Inflammation Oxidative Stress Cells Activation

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

Fast Determination of Benzodiazepines in Human Urine via Liquid-Liquid Extraction with Low Temperature Partitioning and LC-HRMS

引用

American Journal of Analytical Chemistry 2012年第2期3卷 118-124页

作者： elisangela Jaqueline Magalhaes Clesia Cristina Nascentes Rodinei Augusti Maria Eliana Lopes Ribeiro de Queiroz Julio Cesar Cardoso da Silva Robson Jose de Cassia Franco Afonso Departamento de Quimica Universidade Federal de Minas GeraisBelo HorizonteBrazil Departamento de Quimica Universidade Federal de VicosaVicosaBrazil Departamento de Quimica Universidade Federal de Ouro PretoOuro PretoBrazil

A simple and high-throughput method to simultaneously determine selected benzodiazepines (i.e., diazepam, lorazepam, clonazepam, and bromazepam) in urine was developed and validated. The entire methodology consisted of the application of an innovative extraction/cleanup procedure, namely liquid-liquid extraction with low-temperature partitioning (LLE-LTP), and analysis by liquid chromatography combined with high-resolution mass spectrometry (LC-HRMS). The LLE-LTP procedure was optimized via factorial design and by evaluating crucial variables, specifically the freezing mode (either slow or fast), the urine/acetonitrile volume ratio, and the sample ionic strength. The benzodiazepines were quantified using matrix-matched calibration curves where the following parameters were assessed by validation protocol: in general, linearity range of 17 - 200 μg?L–1 (r > 0.9957);limits of detection lower than 5 μg?L–1;relative standard deviations (RSD) lower than 12.5%;and accuracy ranging from 72.3 to 117%. To test this procedure’s performance, the method was applied to determine the content of diazepam in actual urine samples. The validation results obtained for the method demonstrated that the present methodology could be potentially applied in proficient laboratories as a routine approach for determining benzodiazepines compounds content in urine.

关键词： Benzodiazepines Urine LC-HRMS Extraction Procedure Low-Temperature Partitioning

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

Bibliometric Analysis of Nursing Articles Focused on Health Education

引用

Open Journal of Nursing 2014年第4期4卷 223-230页

作者： Carla Monique Mourao Ana Izabel Nicolau Marília Marques Ana Fátima Fernandes Maria Josefina Silva Ana Karina Pinheiro Francisca elisangela Lima Thelma Araújo Camila Moreira Department of Nursing Federal University of Ceará Fortaleza Brazil

This study aimed to analyze the references of articles with the approach to Health Education, published in Brazilian journals of nursing classified as Qualis Nursing A1 and A2. Descriptive study. Setting: SciELO library. We analyzed the references of 113 articles which were used to study the theoretical and methodological framework of bibliometrics, which aimed to promote subsidies for obtaining evaluation indicators of production, contributing to the expansion of scientific knowledge produced and disseminated among authors and researchers in nursing science. The main results showed the prevalence of article such as document most often quoted, references with 5-9 years of temporality, from Brazil and in Portuguese. The journals most frequently used were the Revista Brasileira de Enfermagem e a Revista Latino Americana de Enfermagem. Provided a vision of what is being referenced in nursing publications in Brazil, with regard to the Health Education.

关键词： Nursing Bibliometrics Scientific Health Education

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

Self-Care Practice of Patients with Mechanical Heart Valve Prosthesis Accompanied in Nursing Consultation

引用

Health 2015年第10期7卷 1387-1395页

作者： Lidia Stella Teixeira de Meneses Francisca elisangela Teixeira Lima Sherida Karanini Paz de Oliveira Francisca Jane Gomes Oliveira Maira di Ciero Miranda Vieira Paulo Cesar Almeida Viviane Martins da Silva Federal University of Ceará Fortaleza Brazil Department of Nursing Federal University of Ceará Fortaleza Brazil State University of Ceará Fortaleza Brazil

The objective was to evaluate the practice of self-care of patients with mechanical heart valve prosthesis. A descriptive, cross-sectional study developed in two outpatient valvopathies of teaching hospitals of Fortaleza/CE, from October 2013 to January 2014. The sample consisted of 127 patients with mechanical heart valve prosthesis. It was held an interview using instrument based on the Theory of Orem’s Self-Care and Brazilian Guidelines for Valvular Heart Diseases. The data were presented in tables and charts. Results: Universal self-care practices of larger adhesion: body hygiene (97.6% washed-haired, daily-bath 92.1%);oral hygiene (brushing teeth before sleeping, 87.4%);fluid intake (drinking-water 95.2%);food intake (salt intake ≤ 2 g/day, 92.1%, fruit and vegetable consumption 79.5%);intestinal eliminations (without blood or mucus—96%, non-parasitic 94.4%);urinary elimination (no blood nor pus-96.8%, urination 4 to 6 times a day, 96%). As self-care developmental requirements predominated: never used illegal drugs, tobacco, alcohol, or stopped at the discovery of the disease (70%). As self-care health deviation requirements we have: making use of certain medication at the right dose (95.2%);attending medical appointments (cardiologist—92.1%;nursing—84.2%);INR control (identifies signs of bleeding— 85.8%). We conclude that patients did not perform all recommended self-care practices, being necessary to establish strategies to reduce the self-care deficit.

关键词： Nursing Self-Care Heart Valve

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：