Search results for " Alkaline Earth"

showing 6 items of 6 documents

Spatial analysis of the relationship between mortality from cardiovascular and cerebrovascular disease and drinking water hardness

2004

Journal Article; Research Support, Non-U.S. Gov't; Reproduced with permission from Environmental Health Perspectives. Previously published scientific papers have reported a negative correlation between drinking water hardness and cardiovascular mortality. Some ecologic and case-control studies suggest the protective effect of calcium and magnesium concentration in drinking water. In this article we present an analysis of this protective relationship in 538 municipalities of Comunidad Valenciana (Spain) from 1991-1998. We used the Spanish version of the Rapid Inquiry Facility (RIF) developed under the European Environment and Health Information System (EUROHEIS) research project. The strateg…

GerontologyMaleMini-Monograph: Information SystemsHealth Toxicology and MutagenesisWater supply:Named Groups::Persons::Age Groups::Adult::Middle Aged [Medical Subject Headings]Disease:Health Care::Environment and Public Health::Public Health::Sanitation::Sanitary Engineering::Water Supply [Medical Subject Headings]Magnesio:Organisms::Eukaryota::Animals::Chordata::Vertebrates::Mammals::Primates::Haplorhini::Catarrhini::Hominidae::Humans [Medical Subject Headings]PreescolarMediana EdadReference ValuesExposición a Riesgos AmbientalesMedicineCluster AnalysisMagnesiumMasculinoChildEnfermedades Cardiovascularesgeographic information systems:Named Groups::Persons::Age Groups::Child::Child Preschool [Medical Subject Headings]:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Weights and Measures::Reference Values [Medical Subject Headings]AdultoAguaEpidemiologic SurveillanceEnvironmental exposureMiddle AgedHumanos:Health Care::Environment and Public Health::Public Health::Environmental Pollution::Environmental Exposure [Medical Subject Headings]Abastecimiento de aguarelative risk:Information Science::Information Science::Information Storage and Retrieval::Databases as Topic::Databases Factual::Geographic Information Systems [Medical Subject Headings]Cardiovascular DiseasesNiñoChild Preschool:Diseases::Nervous System Diseases::Central Nervous System Diseases::Brain Diseases::Cerebrovascular Disorders [Medical Subject Headings]Female:Named Groups::Persons::Age Groups::Infant [Medical Subject Headings]Risk assessmentAdulthierarchical spatial modelsAdolescentAncianoSistemas de Información Geográfica:Check Tags::Male [Medical Subject Headings]:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Cluster Analysis [Medical Subject Headings]:Named Groups::Persons::Age Groups::Infant::Infant Newborn [Medical Subject Headings]Risk AssessmentCalcioWater Supply:Chemicals and Drugs::Inorganic Chemicals::Metals::Metals Alkaline Earth::Calcium [Medical Subject Headings]Environmental health:Named Groups::Persons::Age Groups::Adult [Medical Subject Headings]:Chemicals and Drugs::Inorganic Chemicals::Metals::Metals Light::Magnesium [Medical Subject Headings]Humans:Chemicals and Drugs::Inorganic Chemicals::Hydroxides::Water [Medical Subject Headings]:Named Groups::Persons::Age Groups::Adult::Aged [Medical Subject Headings]:Diseases::Cardiovascular Diseases [Medical Subject Headings]Socioeconomic status:Named Groups::Persons::Age Groups::Child [Medical Subject Headings]Agedbusiness.industry:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Statistics as Topic::Probability::Risk::Risk Assessment [Medical Subject Headings]Public Health Environmental and Occupational HealthInfant NewbornInfantWaterLactanteEnvironmental ExposureValores de ReferenciaAnálisis por ConglomeradosEstudios Epidemiológicosenvironmental epidemiologyCerebrovascular DisordersEpidemiologic StudiesTrastornos Cerebrovasculares:Check Tags::Female [Medical Subject Headings]Relative riskspatial smoothingCalciumbusinessMedición de Riesgo:Analytical Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Epidemiologic Methods::Epidemiologic Study Characteristics as Topic::Epidemiologic Studies [Medical Subject Headings]Environmental epidemiology
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Interaction of metal ions with N-glycosylamines: isolation and characterization of the products of 4,6-O-benzylidene-N-(o-carboxyphenyl)-β-D-glucopyr…

2001

Metal-ion complexes of Li+, Na+, K+, Mg2+, Ca2+, Ba2+, Pb2+, Cd2+, Hg2+ with 4,6–O–benzylidene–N–(o–carboxyphenyl)–β–D–glucopyranosylamine were synthesized and isolated as solid products and characterized by analytical means as well as by spectral techniques, such as, 1H and 13C NMR, FTIR, absorption, FAB mass spectrometry, optical rotation and CD. While the alkali metal ions formed ML type of complexes, the other metal ions formed ML2 type complexes. Molecular weights of the complexes of Li+, Na+ and K+ were established based on the molecular-ion peaks in the FAB mass spectra. The saccharide portion remians in the β-anomeric form even after the complexation. The spectral data, as well as t…

GlycosylationMagnetic Resonance SpectroscopyMetal ions in aqueous solutionInorganic chemistrySpectroscopic AnalysisMass spectrometryBiochemistryAlkali MetalsMass SpectrometryAnalytical ChemistryMetals Alkaline EarthSpectroscopy Fourier Transform InfraredQualitative inorganic analysisIonsGlucosamineChemistryFourier Transform Infrared SpectroscopyCircular DichroismOrganic ChemistryGeneral MedicineMercuryCarbon-13 NMRAlkali metalMolecular WeightCrystallographyLeadModels ChemicalMetalsMass spectrumAmine gas treatingAbsorption (chemistry)CadmiumIndraStra Global
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Weak alkali and alkaline earth metal complexes of low molecular weight ligands in aqueous solution

2008

This work is aimed at reviewing the chemical literature dealing with thermodynamic aspects of the weak complex formation (species with log K values less than about 3) between alkali and alkaline earth metal ions with low molecular weight inorganic and organic ligands in aqueous solution. The following ligands (up to hexavalent anions) were examined in detail: (i) hydroxide, chloride, sulfate, carbonate and phosphate as inorganic, and (ii) carboxylates, amines, amino acids, complexones and nucleotides as organic ligands. The paper also identifies the main reasons responsible for the dispersion of the stability data on ion pairs in the literature. When possible, the trend of stability for the…

Ion pairsSupporting electrolyteMetal ions in aqueous solutionInorganic chemistryAlkali metal complexeWeak complexesChlorideAlkali metal complexes; Alkaline earth metal complexes; Weak complexes; Formation and stability in aqueous solution; Ion pairs.Inorganic Chemistrychemistry.chemical_compoundAlkali metal complexesAlkaline earth metal complexesMaterials ChemistrymedicineFormation and stability in aqueous solutionSettore CHIM/01 - Chimica AnaliticaPhysical and Theoretical ChemistryWeak complexeAlkaline earth metalAqueous solutionChemistryLigandAlkali metalAlkaline earth metal complexeHydroxidemedicine.drugCoordination Chemistry Reviews
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A model of biomass char gasification describing the change in catalytic activity of ash

2012

A comprehensive description of catalytic effects during char gasification under various conditions relevant to biomass gasification was made. A three-parallel reaction model was proposed to describe the dynamic change in catalytic activity of ash during gasification of biomass char particles. Three different regimes of conversion were identified by analyzing char reactivity experiments conducted in a vertical TGA with nine biomasses under a wide range of operating conditions (temperature: 1023–1123 K, pressure: 0.1–3.0 MPa and gasification mixtures of CO2–CO–H2O–H2): (1) catalytic char gasification with deactivation of catalyst, (2) non-catalytic char gasification, and (3) catalytic char ga…

Materials sciencebiomassWaste managementGeneral Chemical EngineeringsiliconBiomassmodelingGeneral ChemistryAlkali and alkaline earth metalsEnergy engineeringIndustrial and Manufacturing EngineeringCatalysisChemical engineeringBioenergyScientific methodEnvironmental ChemistryReactivity (chemistry)Charchar gasificationEnergy sourceta116catalystChemical Engineering Journal
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Prediction of alkaline earth elements in bone remains by near infrared spectroscopy.

2016

An innovative methodological approach has been developed for the prediction of the mineral element composition of bone remains. It is based on the use of Fourier Transform Near Infrared (FT-NIR) diffuse reflectance measurements. The method permits a fast, cheap and green analytical way, to understand post-mortem degradation of bones caused by the environment conditions on different skeletal parts and to select the best preserved bone samples. Samples, from the Late Roman Necropolis of Virgen de la Misericordia street and En Gil street located in Valencia (Spain), were employed to test the proposed approach being determined calcium, magnesium and strontium in bone remains and sediments. Coef…

Mean squared errorMineralogychemistry.chemical_element02 engineering and technologyResidual01 natural sciencesBone and BonesAnalytical Chemistrysymbols.namesakeMetals Alkaline EarthSpectroscopy Fourier Transform InfraredHumansMagnesiumBone mineralStrontiumSpectroscopy Near-InfraredChemistryFossils010401 analytical chemistryNear-infrared spectroscopyReproducibility of Results021001 nanoscience & nanotechnology0104 chemical sciencesDiagenesisFourier transformSpainStrontiumsymbolsCalciumDiffuse reflection0210 nano-technologyTalanta
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Importance of ligand speciation in environmental research:A case study

2001

The speciations of EDTA and DTPA in process, waste and river waters are modelled and simulated, specifically to the mode of occurrence in the pulp and paper mill effluents and subsequently in receiving waters. Due to relatively short residence times in bleaching process and waste water treatment and slow exchange kinetics, it is expected that the thermodynamic equilibrium is not necessarily reached. Therefore, the initial speciation plays a key role. As such, the simulations have been extended to the process waters of the pulp and paper industry taking into account estimated average conditions. The results reveal that the main species are; Mn and Ca complexes of EDTA and DTPA in pulp mill p…

Pulp millPaperEnvironmental Engineering02 engineering and technology010501 environmental sciencesengineering.materialLigands01 natural sciencesTransition metalMetals Alkaline EarthEnvironmental ChemistryChelationComputer SimulationWaste Management and DisposalEffluentEdetic Acid0105 earth and related environmental sciencesChelating AgentsAlkaline earth metalChemistrybusiness.industryPulp (paper)Environmental engineeringWaterPaper millPentetic Acid021001 nanoscience & nanotechnologyPollution6. Clean waterEnvironmental chemistryChemical IndustryengineeringSewage treatment0210 nano-technologybusinessWater Pollutants ChemicalEnvironmental Monitoring
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