Efecto de la pasteurización por calentamiento óhmico en las características fisicoquímicas y microbiológicas de cerveza

dc.contributor.advisorGutiérrez Álvarez, Luis Felipespa
dc.contributor.authorBernal Chia, Orlandospa
dc.date.accessioned2023-02-06T18:26:40Z
dc.date.available2023-02-06T18:26:40Z
dc.date.issued2022
dc.descriptionilustraciones, fotografías, gráficas, tablasspa
dc.description.abstractEn este documento se presenta el efecto del calentamiento óhmico en cerveza como método de preservación. La cerveza fue sometida a dos tratamientos independientes, el primero sin enfriamiento (T1) y el segundo con enfriamiento (T2), estos tratamientos se compararon con pasteurización convencional. Para ambos tratamientos se evaluaron las propiedades microbiológicas y fisicoquímicas de la cerveza, al igual que el análisis de superficie de los electrodos del calentador óhmico. El tratamiento T1 afecto significativamente el color, el contenido de hierro, cobre y plomo (P<0.05), respecto a los parámetros de acidez, pH, cenizas y zinc no se evidencio efecto significativo en los dos tratamientos (P>0.05). Para ambos tratamientos se logró una disminución microbiológica significativa de 2 unidades logarítmicas para Candida albicans y de 1.5 unidades logarítmicas para Lactobacillus acidophilus. El análisis SEM realizado a los electrodos permitió evidenciar corrosión después de los tratamientos, corrosión confirmada con el análisis composicional (EDX). La vida útil de cerveza sin carbonatación fue de 20 días debido a cambio en el color de la cerveza, los parámetros de acidez y carga microbiológica fue estable durante 20 días. (Texto tomado de la fuente).spa
dc.description.abstractThis paper presents the effect of ohmic heating on beer as a preservation method. Beer was subjected to two independent treatments, the first without cooling (T1) and the second with cooling (T2), these treatments were compared with conventional pasteurization. For both treatments, the microbiological and physicochemical properties of the beer were evaluated, as well as the surface analysis of the ohmic heater electrodes. The T1 treatment significantly affected the color, iron, copper and lead content (P<0.05); with respect to the parameters of acidity, pH, ash and zinc, there was no significant effect in the two treatments (P>0.05). For both treatments a significant microbiological decrease of 2 log units for Candida Albicans and 1.5 log units for Lactobacillus Acidophilus was achieved. SEM analysis of the electrodes revealed corrosion after the treatments, corrosion confirmed by compositional analysis (EDX). The shelf life of beer without carbonation was 20 days due to a change in the color of the beer; the acidity and microbiological load parameters were stable for 20 days.eng
dc.description.degreelevelMaestríaspa
dc.description.degreenameMagíster en Ciencia y Tecnología de Alimentosspa
dc.description.notesContiene texto en inglésspa
dc.description.researchareaProcesamiento de alimentosspa
dc.format.extentxiii, 66 páginasspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.instnameUniversidad Nacional de Colombiaspa
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombiaspa
dc.identifier.repourlhttps://repositorio.unal.edu.co/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/83323
dc.language.isospaspa
dc.publisherUniversidad Nacional de Colombiaspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.facultyFacultad de Ciencias Agrariasspa
dc.publisher.placeBogotá, Colombiaspa
dc.publisher.programBogotá - Ciencias Agrarias - Maestría en Ciencia y Tecnología de Alimentosspa
dc.relation.indexedAgrosaviaspa
dc.relation.indexedAgrovocspa
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.agrovocCervezasspa
dc.subject.agrovocbeerseng
dc.subject.agrovocTratamiento térmicospa
dc.subject.agrovocheat treatmenteng
dc.subject.agrovocPropiedades fisicoquímicasspa
dc.subject.agrovocchemicophysical propertieseng
dc.subject.ddc620 - Ingeniería y operaciones afines::629 - Otras ramas de la ingenieríaspa
dc.subject.proposalCalentamiento óhmicospa
dc.subject.proposalEstabilidad microbiológica cervezaspa
dc.subject.proposalElectrodosspa
dc.subject.proposalVida útilspa
dc.subject.proposalMetales en cervezaspa
dc.subject.proposalOhmic heatingeng
dc.subject.proposalMicrobiological stability beereng
dc.subject.proposalElectrodeseng
dc.subject.proposalShelf lifeeng
dc.subject.proposalMetals in beereng
dc.titleEfecto de la pasteurización por calentamiento óhmico en las características fisicoquímicas y microbiológicas de cervezaspa
dc.title.translatedEffect of ohmic heating pasteurization on physicochemical and microbiological characteristics of beereng
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
dcterms.audience.professionaldevelopmentEstudiantesspa
dcterms.audience.professionaldevelopmentInvestigadoresspa
dcterms.audience.professionaldevelopmentMaestrosspa
dcterms.audience.professionaldevelopmentPúblico generalspa
dcterms.audience.professionaldevelopmentReceptores de fondos federales y solicitantesspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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