Effects of Isochoric Freezing Conditions on Cut Potato Quality
Isochoric freezing is a pressure freezing technique that could be used to retain the beneficial effects of food storage at temperatures below their freezing point without ice damage. In this study, potato cylinders were frozen in an isochoric system and examined using full factorial combinations of...
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doaj-6af3578d82a44b258719bfebe1e21cd22021-04-29T23:01:24ZengMDPI AGFoods2304-81582021-04-011097497410.3390/foods10050974Effects of Isochoric Freezing Conditions on Cut Potato QualityYuanheng Zhao0Cristina Bilbao-Sainz1Delilah Wood2Bor-Sen Chiou3Matthew J. Powell-Palm4Liubiao Chen5Tara McHugh6Boris Rubinsky7Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaWestern Regional Research Center, U.S. Department of Agriculture, Albany, CA 94710, USAWestern Regional Research Center, U.S. Department of Agriculture, Albany, CA 94710, USAWestern Regional Research Center, U.S. Department of Agriculture, Albany, CA 94710, USADepartment of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, USATechnical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, ChinaWestern Regional Research Center, U.S. Department of Agriculture, Albany, CA 94710, USADepartment of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720, USAIsochoric freezing is a pressure freezing technique that could be used to retain the beneficial effects of food storage at temperatures below their freezing point without ice damage. In this study, potato cylinders were frozen in an isochoric system and examined using full factorial combinations of three processing procedures (immersed in water, vacuum-packed and immersed in ascorbic acid solution), four freezing temperatures/pressures (−3 °C/37 MPa, −6 °C/71 MPa, −9 °C/101 MPa and −15 °C/156 MPa) and two average compression rates (less than 0.02 and more than 0.16 MPa/s). The effects of process variables on critical quality attributes of frozen potatoes after thawing were investigated, including mass change, volume change, water holding capacity, color and texture. Processing procedure and freezing temperature/pressure were found to be highly significant factors, whereas the significance of the compression rate was lower. For the processing procedures, immersion in an isotonic solution of 5% ascorbic acid best preserved quality attributes. At the highest pressure level of 156 MPa and low compression rate of 0.02 MPa/s, potato samples immersed in ascorbic acid retained their color, 98.5% mass and 84% elasticity modulus value. These samples also showed a 1% increase in volume and 13% increase in maximum stress due to pressure-induced hardening.https://www.mdpi.com/2304-8158/10/5/974potatoisochoric freezingtexturebrowning |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuanheng Zhao Cristina Bilbao-Sainz Delilah Wood Bor-Sen Chiou Matthew J. Powell-Palm Liubiao Chen Tara McHugh Boris Rubinsky |
spellingShingle |
Yuanheng Zhao Cristina Bilbao-Sainz Delilah Wood Bor-Sen Chiou Matthew J. Powell-Palm Liubiao Chen Tara McHugh Boris Rubinsky Effects of Isochoric Freezing Conditions on Cut Potato Quality Foods potato isochoric freezing texture browning |
author_facet |
Yuanheng Zhao Cristina Bilbao-Sainz Delilah Wood Bor-Sen Chiou Matthew J. Powell-Palm Liubiao Chen Tara McHugh Boris Rubinsky |
author_sort |
Yuanheng Zhao |
title |
Effects of Isochoric Freezing Conditions on Cut Potato Quality |
title_short |
Effects of Isochoric Freezing Conditions on Cut Potato Quality |
title_full |
Effects of Isochoric Freezing Conditions on Cut Potato Quality |
title_fullStr |
Effects of Isochoric Freezing Conditions on Cut Potato Quality |
title_full_unstemmed |
Effects of Isochoric Freezing Conditions on Cut Potato Quality |
title_sort |
effects of isochoric freezing conditions on cut potato quality |
publisher |
MDPI AG |
series |
Foods |
issn |
2304-8158 |
publishDate |
2021-04-01 |
description |
Isochoric freezing is a pressure freezing technique that could be used to retain the beneficial effects of food storage at temperatures below their freezing point without ice damage. In this study, potato cylinders were frozen in an isochoric system and examined using full factorial combinations of three processing procedures (immersed in water, vacuum-packed and immersed in ascorbic acid solution), four freezing temperatures/pressures (−3 °C/37 MPa, −6 °C/71 MPa, −9 °C/101 MPa and −15 °C/156 MPa) and two average compression rates (less than 0.02 and more than 0.16 MPa/s). The effects of process variables on critical quality attributes of frozen potatoes after thawing were investigated, including mass change, volume change, water holding capacity, color and texture. Processing procedure and freezing temperature/pressure were found to be highly significant factors, whereas the significance of the compression rate was lower. For the processing procedures, immersion in an isotonic solution of 5% ascorbic acid best preserved quality attributes. At the highest pressure level of 156 MPa and low compression rate of 0.02 MPa/s, potato samples immersed in ascorbic acid retained their color, 98.5% mass and 84% elasticity modulus value. These samples also showed a 1% increase in volume and 13% increase in maximum stress due to pressure-induced hardening. |
topic |
potato isochoric freezing texture browning |
url |
https://www.mdpi.com/2304-8158/10/5/974 |
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