Search results for "rivers"

showing 10 items of 222 documents

Cross-sectional flow and bed shear stress: application of the depth-averaged momentum equation in a meandering laboratory flume

2014

Rivers meanders secondary circulation numerical simulationSettore ICAR/01 - Idraulica
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Vegetation against erosion downstream of a hydraulic structure

2016

The present work shows the effects of vegetation on sediment transport process. The volume of sediments transported at different time steps is determined by applying a numerical model previously developed [4] and the model parameters are calibrated by using the experimental data.

Rivers scouring flow characteristics vegetationSettore ICAR/01 - Idraulica
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Analysis of local scour downstream of bed sills: preliminary results of an experimental work

2006

Bed sills are often used to limit bed degradation, to control bed erosion around bridge piers or downstream stilling basins of dams. In this paper, the local scour that takes place downstream of the bed sill, in addition to the general erosion process, is examined. The data collected during experimental work are used to analyse the applicability of the relationship found in the literature and to define the relation between the maximum scour depth and the flow rate.

Rivers scouring protection experiments
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Studio dell’interazione corrente-vegetazione in un alveo meandriforme di elevata ampiezza in presenza di vegetazione sommersa matura e non ed al vari…

RiversvegetationmeandersexperimentsSettore ICAR/01 - Idraulica
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Distribution and characteristics of Listeria monocytogenes isolates from surface waters of the South Nation River Watershed, Ontario, Canada

2007

ABSTRACT Listeria monocytogenes is a facultative intracellular pathogen thought to be widely distributed in the environment. We investigated the prevalence and characteristics of L. monocytogenes isolates from surface waters derived from catchments within the South Nation River watershed (Ontario, Canada). This watershed is dominated by urban and rural development, livestock and crop production, and wildlife habitats. From June to November 2005, a total of 314 surface water samples were collected biweekly from 22 discrete sampling sites characterized by various upstream land uses. Presumptive Listeria spp. were isolated using a selective enrichment and isolation procedure, and 75 L. monocyt…

SerotypeVeterinary medicineGenotypeVirulenceMicrobial Sensitivity TestsBiologymedicine.disease_causeApplied Microbiology and Biotechnology03 medical and health sciencesRiversListeria monocytogenesGenotypeEnvironmental MicrobiologymedicineAnimalsHumansInternalinPathogenEcosystemUrban Renewal030304 developmental biologyOntario2. Zero hunger[SDV.EE]Life Sciences [q-bio]/Ecology environment0303 health sciencesVirulenceEcology030306 microbiologybusiness.industryEcologyLISTERIA MONOCYTOGENESAgriculture15. Life on landbiology.organism_classification6. Clean waterAnti-Bacterial AgentsBacterial Typing TechniquesCulture Media3. Good healthPhenotypeListeriaSocial PlanningLivestockSeasonsbusinessFood ScienceBiotechnology
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Indicators of rivers geomorphological functionality, application of the EU Water Framework Directive in Sicily (Italy)

2015

Many river systems in Europe suffer from human pressure. For this reason the European Water Framework Directive (WFD; 2000/60/EC) was created for river basin and floods management. In 2010 the Italian Environmental Minister issued the WFD and a protocol for the stream hydromorphological evaluation, analysis, and monitoring was established (IDRAIM). The Morphology Quality Index (MQI) is part of this procedure and defines the deviation of present geomorphic reach situation from reference conditions. It is composed by Indicators of Geomorphological Functionality (IGF), Indicators of Artificiality (IA) and Indicators of Channel Adjustments (ICA). The present work aims at illustrating the calcula…

Settore GEO/04 - Geografia Fisica E GeomorfologiaRivers geomorphologyMorphology Quality Index (MQI)
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Bipolar membrane reverse electrodialysis for the sustainable recovery of energy from pH gradients of industrial wastewater: Performance prediction by…

2021

Abstract The theoretical energy density extractable from acidic and alkaline solutions is higher than 20 kWh m−3 of single solution when mixing 1 M concentrated streams. Therefore, acidic and alkaline industrial wastewater have a huge potential for the recovery of energy. To this purpose, bipolar membrane reverse electrodialysis (BMRED) is an interesting, yet poorly studied technology for the conversion of the mixing entropy of solutions at different pH into electricity. Although it shows promising performance, only few works have been presented in the literature so far, and no comprehensive models have been developed yet. This work presents a mathematical multi-scale model based on a semi-…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciWork (thermodynamics)pH gradient energyEnvironmental Engineering0208 environmental biotechnologyMixing (process engineering)02 engineering and technologyWastewater010501 environmental sciencesManagement Monitoring Policy and Law01 natural sciencesIndustrial wastewater treatmentElectricityRiversion-exchange membraneReversed electrodialysisPerformance predictionProcess engineeringelectro-membrane proceWaste Management and Disposal0105 earth and related environmental sciencesPower densitybusiness.industryProton-Motive ForceMembranes Artificialbipolar membrane reverse electrodialysisGeneral Medicinewastewater valorisation020801 environmental engineeringMembraneEnvironmental sciencebusinessEfficient energy useJournal of Environmental Management
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Contatti culturali, identità e popolamento nel territorio imerese

2016

Il lavoro prende in considerazione il problema dei rapporti tra coloni greci e comunità indigene nel territorio di Himera, sulla base dei risultati della prospezione archeologica condotta per tre decenni nelle valli dei fiumi Imera settentrionale, Torto e S. Leonardo. Vengono esaminati gli elementi di cultura materiale che permettono di definire i modi dell'interazione culturale tra coloni e indigeni, nonché di ricostruire i paesaggi politici, socio-economici e il paesaggio del sacro nelle diverse aree indagate e nei diversi comprensori. La ricerca infatti permette di delineare, oltre alle usuali organizzazioni insediative e agricole della chora politiké e della éremos chora, anche articola…

Settore L-ANT/09 - Topografia AnticaSettore L-ANT/07 - Archeologia ClassicaThis work focuses on the problem of cultural contacts between Greek colonists and indigenous communities in the territory of Himera based on the results of the archaeological survey conducted for three decades in the valleys of the northern Imera Torto and S. Leonardo rivers. The elements of material culture that enable us to define the ways of cultural interaction between settlers and indigenous peoples as well as to reconstruct the political socio-economic and sacred landscapes in the various districts investigated are examined. In fact the research allows to outline in addition to the usual settlement and agricultural organizations of chora politiké and éremos chora articulated areas within the territory of Himera and to understand the landmarks of the rural settlement alongside the presence of highland settlements . Therefore the center-periphery approach is abandoned for a more articulated analysis demonstrating different forms of settlement and cultural contact in the three river valleys of the Himera hinterland.
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Use of ICS in COPD: From Blockbuster Medicine to Precision Medicine

2017

Chronic obstructive pulmonary disease (COPD) is a major cause of mortality worldwide, whose burden is expected to increase in the next decades, because of numerous risk factors, including the aging of the population. COPD is both preventable and treatable by an effective management including risk factor reduction, prevention, assessment, and treatment of acute exacerbations and co-morbidities. The available agents approved for COPD treatment are long-acting or ultra-long-acting β2-agonists (LABAs) and long-acting muscarinic antagonists (LAMAs) bronchodilators, as well as inhaled corticosteroids (ICS) in combination with LABAs. ICS use has been restricted only to selected COPD patients by th…

Settore MED/10 - Malattie dell'Apparato RespiratorioAlternative medicineCOPD; drivers; inhaled corticosteroids; prescribing; Pulmonary and Respiratory MedicineCOPD; drivers; inhaled corticosteroids; prescribingAdrenal Cortex HormonePulmonary Disease Chronic Obstructive0302 clinical medicineAdrenal Cortex HormonesDrug Combination030212 general & internal medicinePractice Patterns Physicians'Precision Medicineeducation.field_of_studyCOPDEvidence-Based MedicineprescribingdriversBronchodilator AgentsDrug CombinationsMuscarinic AntagonistPractice Guidelines as TopicGuideline AdherenceHumanAdrenergic beta-2 Receptor AgonistPulmonary and Respiratory Medicinemedicine.medical_specialtydriverPopulationSocio-culturaleInhaled corticosteroidsMuscarinic Antagonistsinhaled corticosteroid03 medical and health sciencesAdministration InhalationmedicineHumansCOPDMedical prescriptionRisk factorIntensive care medicineeducationAdrenergic beta-2 Receptor AgonistsBronchodilator AgentPrimary Health Carebusiness.industryPrecision medicinemedicine.disease030228 respiratory systemObservational studyinhaled corticosteroidsbusiness
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Dispersive solid-phase extraction based on oleic acid-coated magnetic nanoparticles followed by gas chromatography-mass spectrometry for UV-filter de…

2011

Abstract A sensitive analytical method to concentrate and determine extensively used UV filters in cosmetic products at (ultra)trace levels in water samples is presented. The method is based on a sample treatment using dispersive solid-phase extraction (dSPE) with laboratory-made chemisorbed oleic acid-coated cobalt ferrite (CoFe 2 O 4 @oleic acid) magnetic nanoparticles (MNPs) as optimized sorbent for the target analytes. The variables involved in dSPE were studied and optimized in terms of sensitivity, and the optimum conditions were: mass of sorbent, 100 mg; donor phase volume, 75 mL; pH, 3; and sodium chloride concentration, 30% (w/v). After dSPE, the MNPs were eluted twice with 1.5 mL …

SorbentBiochemistrySensitivity and SpecificityGas Chromatography-Mass SpectrometryAnalytical ChemistryTap waterRiversSample preparationSolid phase extractionMagnetite NanoparticlesDetection limitChromatographyElutionChemistryOrganic ChemistryExtraction (chemistry)Osmolar ConcentrationSolid Phase ExtractionReproducibility of ResultsWaterGeneral MedicineHydrogen-Ion ConcentrationGas chromatography–mass spectrometrySunscreening AgentsWater Pollutants ChemicalOleic AcidJournal of chromatography. A
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