Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation

Abstract: A commercial drinkable yogurt with and without 4% of added trehalose (as cell protectant) was spray-dried obtaining a powder with low water activity (aw). Total bacterial count in the powder was between 8.48-8.90 log cfu/g. The dried yogurt was stored: (i) at 38 °C and aw = 0.33; (ii) at 3...

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Autores principales: Bater, Caterina, Santos, Mauricio, Galmarini, Mara Virginia, Gómez Zavaglia, Andrea, Chirife, Jorge
Formato: Artículo
Lenguaje:Inglés
Publicado: Cambridge University Press 2020
Materias:
SECADO POR PULVERIZACION
YOGUR
ALMACENAMIENTO
FERMENTACION
Acceso en línea:https://repositorio.uca.edu.ar/handle/123456789/9605
Aporte de:
Repositorio Institucional de la Universidad Católica Argentina (UCA) de Universidad Católica Argentina
id I33-R139123456789-9605
record_format dspace
institution Universidad Católica Argentina
institution_str I-33
repository_str R-139
collection Repositorio Institucional de la Universidad Católica Argentina (UCA)
language Inglés
topic SECADO POR PULVERIZACION
YOGUR
ALMACENAMIENTO
FERMENTACION
spellingShingle SECADO POR PULVERIZACION
YOGUR
ALMACENAMIENTO
FERMENTACION
Bater, Caterina
Santos, Mauricio
Galmarini, Mara Virginia
Gómez Zavaglia, Andrea
Chirife, Jorge
Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
topic_facet SECADO POR PULVERIZACION
YOGUR
ALMACENAMIENTO
FERMENTACION
description Abstract: A commercial drinkable yogurt with and without 4% of added trehalose (as cell protectant) was spray-dried obtaining a powder with low water activity (aw). Total bacterial count in the powder was between 8.48-8.90 log cfu/g. The dried yogurt was stored: (i) at 38 °C and aw = 0.33; (ii) at 38 °C in hermetically sealed flasks (aw = 0.21/0.22); (iii) in a cyclic temperature chamber (10-20 °C) in hermetically sealed flasks (aw = 0.21/0.22). Whole milk was then fermented by adding an inoculum of spray-dried yogurt after storage under these different conditions. The kinetics of acidification showed the presence of a lag time which was strongly dependent on storage conditions. The data was fitted with a logistic type equation from which the lag time was calculated. To evaluate structural differences among samples, Fourier Transform Infrared spectra (FTIR) were recorded. Partial Least Squares (PLS) models enabled a good correlation between lag time of fermentation and FTIR spectra. The lag time for yogurt powder stored at aw about 0.21/0.22 and cyclic temperature 10-20 °C remained approximately constant over the 12 weeks of storage, while all the other conditions resulted in a dramatic increase. The addition of trehalose had a small influence on lag time and, therefore, as a protectant of lactobacilli.
format Artículo
author Bater, Caterina
Santos, Mauricio
Galmarini, Mara Virginia
Gómez Zavaglia, Andrea
Chirife, Jorge
author_facet Bater, Caterina
Santos, Mauricio
Galmarini, Mara Virginia
Gómez Zavaglia, Andrea
Chirife, Jorge
author_sort Bater, Caterina
title Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
title_short Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
title_full Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
title_fullStr Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
title_full_unstemmed Influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
title_sort influence of different storage conditions on the performance of spray-dried yogurt used as inoculum for milk fermentation
publisher Cambridge University Press
publishDate 2020
url https://repositorio.uca.edu.ar/handle/123456789/9605
work_keys_str_mv AT batercaterina influenceofdifferentstorageconditionsontheperformanceofspraydriedyogurtusedasinoculumformilkfermentation
AT santosmauricio influenceofdifferentstorageconditionsontheperformanceofspraydriedyogurtusedasinoculumformilkfermentation
AT galmarinimaravirginia influenceofdifferentstorageconditionsontheperformanceofspraydriedyogurtusedasinoculumformilkfermentation
AT gomezzavagliaandrea influenceofdifferentstorageconditionsontheperformanceofspraydriedyogurtusedasinoculumformilkfermentation
AT chirifejorge influenceofdifferentstorageconditionsontheperformanceofspraydriedyogurtusedasinoculumformilkfermentation
bdutipo_str Repositorios
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