Search results for "ESTADISTICA E INVESTIGACION OPERATIVA"

showing 5 items of 55 documents

Influence of storage and in vitro gastrointestinal digestion on totqal antioxidant capacity of fruit beverages

2011

Eight fruit beverages containing grape, orange and apricot, with/without iron and/or zinc and with/without milk added were analyzed for total antioxidant capacity (ORAC and TEAC methods), ascorbic acid content, and total polyphenols. The influence of cold storage (2-4 degrees C) during the product shelf-life (135 days) and antioxidant capacity after an in vitro gastrointestinal digestion were evaluated. Antioxidant capacity for all beverages together increased significantly (p < 0.05) at the end of storage (16.4% and 12.8% for ORAC and TEAC, respectively), whereas ascorbic acid remained stable. Regarding in vitro digestion, antioxidant values of bioaccessible fractions of fruit beverages in…

VitaminTotal polyphenolsAntioxidantmedicine.medical_treatmentESTADISTICA E INVESTIGACION OPERATIVATotal antioxidant capacityCold storageFruit beveragesStorageIn vitro gastrointestinal digestionBioaccessibilityOrange (colour)L-Ascorbic acidchemistry.chemical_compoundmedicineFood scienceFood analysisFood preservationfood and beveragesFood composition dataAscorbic acidchemistryPolyphenolFood compositionFood Science
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TiO2 Nanostructures for Photoelectrocatalytic Degradation of Acetaminophen

2019

[EN] Advanced oxidation processes driven by renewable energy sources are gaining attention in degrading organic pollutants in waste waters in an efficient and sustainable way. The present work is focused on a study of TiO2 nanotubes as photocatalysts for photoelectrocatalytic (PEC) degradation of acetaminophen (AMP) at different pH (3, 7, and 9). In particular, different TiO2 photocatalysts were synthetized by stirring the electrode at different Reynolds numbers (Res) during electrochemical anodization. The morphology of the photocatalysts and their crystalline structure were evaluated by field emission scanning electron microscopy (FESEM) and Raman confocal laser microscopy (RCLM). These a…

anodizationAnataseMaterials sciencePHGeneral Chemical EngineeringESTADISTICA E INVESTIGACION OPERATIVA02 engineering and technology010501 environmental sciencesElectrochemistry01 natural sciencesINGENIERIA QUIMICAlcsh:ChemistryAbsorbancechemistry.chemical_compoundsymbols.namesakenanostructuresGeneral Materials Scienceacetaminophen0105 earth and related environmental sciencesAcetaminophenPhotocurrentNanoestructurespHtitanium dioxideAnodizingFotoelectricitatPhotoelectrodegradation021001 nanoscience & nanotechnologyNanostructureslcsh:QD1-999chemistryChemical engineeringTitanium dioxidesymbolsDegradation (geology)Titanium dioxideAnodization0210 nano-technologyRaman spectroscopyphotoelectrodegradation
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The measurement invariance of Job Diagnostic Survey (JDS) across three university student groups

2016

Purpose: The main purpose of this study is to apply a multigroup confirmatory analysis to examine the measurement invariance (MI) of the adapted version of the Job Diagnosis Survey (JDS) as a measurement tool that analyses the relationship between the features of teaching methodologies with university students’ motivation and satisfaction across data collected on different degrees and academic years. Design/methodology/approach: Confirmatory factor analysis was carried out using a multigroup structural equation model, using the program EQS 6.1 to test the invariance of the adapted version of JDS in a sample constituted by 535 student of a Spanish public university. The assessment of invaria…

lcsh:T55.4-60.8Strategy and ManagementPopulationESTADISTICA E INVESTIGACION OPERATIVASample (statistics)Context (language use)Job Diagnosis Surveylcsh:BusinessIndustrial and Manufacturing EngineeringStructural equation modeling:Ensenyament i aprenentatge::Metodologies docents [Àrees temàtiques de la UPC]Measurement equivalencemeasurement equivalence student's satisfaction and motivation job diagnosis survey multigroup confirmatory analysis higher education invariancelcsh:Social Sciences0502 economics and businessStatisticsddc:650Mathematics education:Ensenyament i aprenentatge::Ensenyament universitari [Àrees temàtiques de la UPC]lcsh:Industrial engineering. Management engineeringMeasurement invarianceHigher educationeducationEducation Higher--EvaluationEnsenyament universitari -- Avaluaciólcsh:Commerceeducation.field_of_study05 social sciencesJob diagnosis surveyInvariance050301 educationStudent's satisfaction and motivationHigher EducationConfirmatory factor analysislcsh:Hlcsh:HF1-6182Sample size determinationORGANIZACION DE EMPRESASMetric (unit)Multigroup confirmatory analysislcsh:HF5001-6182Psychology0503 education050203 business & management
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Effects of Resistance Training of Peripheral Muscles Versus Respiratory Muscles in Older Adults With Sarcopenia Who are Institutionalized: A Randomiz…

2018

[EN] This study compares the effects of two resistance training programs in peripheral and respiratory musculature on muscle mass and strength and physical performance and identifies the appropriate muscle mass parameter for assessing the intervention effects. Thirty-seven institutionalized older Spanish adults with sarcopenia were analyzed: control group (n = 17), respiratory muscle training group (n = 9), and peripheral muscle training group (n = 11). Measured outcomes were appendicular skeletal muscle mass (ASM/height(2), ASM/weight, and ASM/BMI), isometric knee extension, arm flexion and handgrip strength, maximal inspiratory and expiratory pressures, and gait speed pre- and postinterve…

medicine.medical_specialtySarcopeniaAgingESTADISTICA E INVESTIGACION OPERATIVANursing homesPhysical Therapy Sports Therapy and Rehabilitationlaw.inventionBody Mass IndexExercise training03 medical and health sciences0302 clinical medicineRandomized controlled triallawMedicineHumans030212 general & internal medicineRespiratory systemMuscle SkeletalAged030214 geriatricsHand Strengthbusiness.industryMuscle strengthPreventionRehabilitationBody WeightResistance trainingInstitutionalizationResistance Trainingmedicine.diseasemusculoskeletal systemBody HeightRespiratory MusclesPeripheralWalking SpeedSpainSarcopeniaMuscle strengthPhysical therapyGeriatrics and GerontologybusinessNursing homesGerontology
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A Statistical Approach for A-Posteriori Deployment of Microclimate Sensors in Museums: A Case Study

2022

[EN] The deployment of sensors is the first issue encountered when microclimate monitoring is planned in spaces devoted to the conservation of artworks. Sometimes, the first decision regarding the position of sensors may not be suitable for characterising the microclimate close to climate sensitive artworks or should be revised in light of new circumstances. This paper fits into this context by proposing a rational approach for a posteriori deployment of microclimate sensors in museums where long-term temperature and relative humidity observations were available (here, the Rosenborg Castle, Copenhagen, Denmark). Different statistical tools such as box-and-whisker plots, principal component …

principal component analysisMuseumsClimatemuseumESTADISTICA E INVESTIGACION OPERATIVAtemperatureHumidityUNESCO::CIENCIAS ECONÓMICASmultivariate approachsensorsrelative humidityBiochemistryAtomic and Molecular Physics and OpticsAnalytical Chemistrymuseum; microclimate; multivariate approach; principal component analysis; cluster analysis; sensors; deployment; temperature; relative humiditycluster analysis; deployment; microclimate; multivariate approach; museum; principal component analysis; relative humidity; sensors; temperature; Climate; Humidity; Temperature; Microclimate; MuseumsFISICA APLICADAdeploymentElectrical and Electronic EngineeringInstrumentationmicroclimatecluster analysisSensors; Volume 22; Issue 12; Pages: 4547
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