Expansion of Emmental cheese and tofu using instant controlled pressure drop (DIC) process

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00352566" target="_blank" >RIV/68407700:21220/22:00352566 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.fbp.2021.10.007" target="_blank" >https://doi.org/10.1016/j.fbp.2021.10.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.fbp.2021.10.007" target="_blank" >10.1016/j.fbp.2021.10.007</a>

Result language

angličtina

Original language name

Expansion of Emmental cheese and tofu using instant controlled pressure drop (DIC) process

Original language description

Two foods, belonging to different protein sources (dairy vs plant), namely Emmental cheese and tofu, were treated by the instant pressure drop (DIC) process inserted between two drying stages to obtain expanded and crispy snacks. This process consisted of a short heating step (t = 38–52 s) using steam under pressure (p = 0.26–0.62 MPa) and instantaneous pressure drop toward a vacuum. This pressure drop provoked auto-vaporization of the superheated liquid, which resulted in volume expansion, and cooling of the food. The expansion was visualized using a rapid camera at a frequency of 1000 images/s. The pressure and temperature histories were registered simultaneously. Three expansion ratios were evaluated: (i) r the ratio of food volumes after and before DIC process measured using sand pycnometry, (ii) rC calculated from dimensions measured by a caliper, and (iii) rI calculated from dimension reading from images. The shrinkage s = (rI/rC) -1, and the deformation d = (rC/r) -1 of the samples were then evaluated. Using response surface methodology, the optimal processing conditions for maximum expansions r = 2.5 and rC = 4.5 were found for Emmental and tofu, respectively as p = 0.5 and 0.62 MPa, t = 40 and 38 s. The creation of mist, inherent to the pressure drop of steam, made the visual observation impossible at the beginning of pressure drop. The samples were already expanded when the mist disappeared. Taking the mist presence as the upper limit of expansion time, the expansion took dozens of milliseconds at a pressure drop rate of 1.25 MPa/s. The temperature in the reactor decreased at a rate of 750 °C/s.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

21101 - Food and beverages

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Food and Bioproducts Processing

ISSN

0960-3085

e-ISSN

1744-3571

Volume of the periodical

131

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

1-12

UT code for WoS article

000721147900001

EID of the result in the Scopus database

2-s2.0-85118528182