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dc.date.accessioned 2020-06-30T16:04:04Z
dc.date.available 2020-06-30T16:04:04Z
dc.identifier.uri http://digital.cic.gba.gob.ar/handle/11746/10634
dc.title Monitoring the characteristics of cultivable halophilic microbial community during salted-ripened anchovy (Engraulis anchoita) production en
dc.type Artículo es
dcterms.abstract The halophilic microbial community of the salted-ripened anchovy process was studied. Samples from raw materials (salt and fresh anchovies) and from the stages of brining and ripening were collected and analyzed for their bacterial counts at 15 and 20% NaCl. No halophilic colonies were found in fresh anchovy and counts of about 103 CFU/g were determined in salt samples. A fluctuation of bacterial counts during the process was found. At the end of brining, ~104 CFU/g were determined in anchovy samples and this value was reduced to not detectable counts at the beginning of the ripening stage. After one month, counts increased to ~104 CFU/g and remained stable until the end of the process. From each sample, colonies having different morphotypes were isolated and submitted to a macro and microscopic characterization, a study of salt requirement for growth, and biochemical and phenotypic tests. The results were submitted to Univariate, Bivariate and Multiple Correspondence Factorial Analysis (MCFA). A total of 79 colonies were isolated during the salting-ripening anchovy process. Among the isolates, about 40–50% was positive for indole production and lipolytic activity and a 25% showed ability to produce H2S and proteolytic capacity. Proteolytic and lipolytic activities were well balanced along the process and resulted independent from the isolation stage, which is a desirable condition due to the contribution of microbial proteolysis and lipolysis to the development of texture and final aroma, respectively. H2S and indole producers practically were not detected during ripening. This fact is important because indole and H2S are associated with the development of off-flavors and spoilage in salted fish products. MFCA and Cluster Analyses complemented the Bivariate Analyses. The factor map showed proximity between the isolates from salt samples and from ripening. Isolates were statistically clustered in two groups. Cluster 1 grouped non-desirable activities (H2S and indole production) with cultures proceeding from brining whereas Cluster 2 related isolates mainly from salt samples and during ripening with some desirable microbial capacities (Cytochrome oxidase activity and non-H2S and non-indole production). These results would indicate that during the ripening process of salted anchovies, a natural selection of beneficial microorganisms for the development of the typical product sensory attributes occurred. en
dcterms.issued 2018
dcterms.language Inglés es
dcterms.license Atribución-NoComercial 4.0 Internacional es
dcterms.subject anchoíta es
dcterms.subject Histamina es
dcterms.subject microorganismos es
cic.version info:eu-repo/semantics/submittedVersion es
dcterms.creator.author Silvina, Perez es
dcterms.creator.author Pérez, Silvina es
dcterms.creator.author Czerner, Marina es
dcterms.creator.author Patat, María Laura es
dcterms.creator.author Zaritzky, Noemi Elisabet es
dcterms.creator.author Murialdo, Silvia Elena es
dcterms.creator.author Yeannes, María Isabel es
cic.lugarDesarrollo Instituto de Ciencia y Tecnología de Alimentos y Ambiente es
dcterms.subject.materia Alimentos y Bebidas es
dcterms.identifier.url Recurso completo es
dcterms.isPartOf.issue International Journal of Food Microbiology es
dcterms.isPartOf.series International Journal of Food Microbiology es
cic.isPeerReviewed true es
cic.isFulltext true es
cic.institucionOrigen Instituto de Ciencia y Tecnología de Alimentos y Ambiente es


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