Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions
In this study, a series of pretreatments, including ice-glazing, polyphosphate impregnated, and both ice-glazing and polyphosphate impregnated, were employed to pretreat shucked oysters in order to explore the optimal processing conditions for long-time storage. The effect of repeated freezing-thawi...
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Language: | English |
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MDPI AG
2022
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Online Access: | https://doi.org/10.3390/su14159404 https://doaj.org/article/61b8bd5412144289a7aa1d23a958143c |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:61b8bd5412144289a7aa1d23a958143c 2023-05-15T15:58:59+02:00 Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions Hsin-Shan Tsai Yu-Tien Hsiao Yih-Ming Weng 2022-08-01 https://doi.org/10.3390/su14159404 https://doaj.org/article/61b8bd5412144289a7aa1d23a958143c en eng MDPI AG doi:10.3390/su14159404 2071-1050 https://doaj.org/article/61b8bd5412144289a7aa1d23a958143c undefined Sustainability, Vol 14, Iss 9404, p 9404 (2022) shucked oyster ice-glazing individual freezing drip loss water holding capacity total aerobic plate count (TAPC) envir socio Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.3390/su14159404 2023-01-22T19:24:26Z In this study, a series of pretreatments, including ice-glazing, polyphosphate impregnated, and both ice-glazing and polyphosphate impregnated, were employed to pretreat shucked oysters in order to explore the optimal processing conditions for long-time storage. The effect of repeated freezing-thawing cycles on the quality of oysters was evaluated. Several quality indicators were used to investigate the effects of pretreatment. For the VBN (volatile salt-based nitrogen) value, the lowest value was 9.1 ± 0.2 of BPG (block oyster with polyphosphate impregnated and ice-glazing), which was significantly lower than 9.6 ± 0.2 of IPG (individual oyster with polyphosphate impregnated and ice-glazing). In terms of drip loss, there was no significant difference between the IPG (21.0 ± 0.2%) and the BPG (20.8 ± 0.2%). In addition, the highest WHC% (water holding capacity) was IPG (65.5 ± 0.5%) which was slightly lower than BPG (67.6 ± 0.6%). As compared to the experimental control, the IPG and BPG had the best appearance and color. In terms of TAPC (total aerobic plate count), with the increase of freezing storage time, each group showed a slight downward trend, but the difference was not statistically significant. After repeated freezing-thawing of block frozen oysters, there were significant differences in drip loss, WHC, and cooked taste with the increasing number of times, and there was a trend of deterioration (p < 0.05). Repeated freezing and thawing can seriously degrade the quality of oysters, so individual freezing (especially IPG) should be the most appropriate processing method. Article in Journal/Newspaper Crassostrea gigas Pacific oyster Unknown Pacific Sustainability 14 15 9404 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
shucked oyster ice-glazing individual freezing drip loss water holding capacity total aerobic plate count (TAPC) envir socio |
spellingShingle |
shucked oyster ice-glazing individual freezing drip loss water holding capacity total aerobic plate count (TAPC) envir socio Hsin-Shan Tsai Yu-Tien Hsiao Yih-Ming Weng Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
topic_facet |
shucked oyster ice-glazing individual freezing drip loss water holding capacity total aerobic plate count (TAPC) envir socio |
description |
In this study, a series of pretreatments, including ice-glazing, polyphosphate impregnated, and both ice-glazing and polyphosphate impregnated, were employed to pretreat shucked oysters in order to explore the optimal processing conditions for long-time storage. The effect of repeated freezing-thawing cycles on the quality of oysters was evaluated. Several quality indicators were used to investigate the effects of pretreatment. For the VBN (volatile salt-based nitrogen) value, the lowest value was 9.1 ± 0.2 of BPG (block oyster with polyphosphate impregnated and ice-glazing), which was significantly lower than 9.6 ± 0.2 of IPG (individual oyster with polyphosphate impregnated and ice-glazing). In terms of drip loss, there was no significant difference between the IPG (21.0 ± 0.2%) and the BPG (20.8 ± 0.2%). In addition, the highest WHC% (water holding capacity) was IPG (65.5 ± 0.5%) which was slightly lower than BPG (67.6 ± 0.6%). As compared to the experimental control, the IPG and BPG had the best appearance and color. In terms of TAPC (total aerobic plate count), with the increase of freezing storage time, each group showed a slight downward trend, but the difference was not statistically significant. After repeated freezing-thawing of block frozen oysters, there were significant differences in drip loss, WHC, and cooked taste with the increasing number of times, and there was a trend of deterioration (p < 0.05). Repeated freezing and thawing can seriously degrade the quality of oysters, so individual freezing (especially IPG) should be the most appropriate processing method. |
format |
Article in Journal/Newspaper |
author |
Hsin-Shan Tsai Yu-Tien Hsiao Yih-Ming Weng |
author_facet |
Hsin-Shan Tsai Yu-Tien Hsiao Yih-Ming Weng |
author_sort |
Hsin-Shan Tsai |
title |
Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
title_short |
Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
title_full |
Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
title_fullStr |
Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
title_full_unstemmed |
Effects of Individual and Block Freezing on the Quality of Pacific Oyster (Crassostrea gigas) during Storage under Different Pretreatment Conditions |
title_sort |
effects of individual and block freezing on the quality of pacific oyster (crassostrea gigas) during storage under different pretreatment conditions |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/su14159404 https://doaj.org/article/61b8bd5412144289a7aa1d23a958143c |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Sustainability, Vol 14, Iss 9404, p 9404 (2022) |
op_relation |
doi:10.3390/su14159404 2071-1050 https://doaj.org/article/61b8bd5412144289a7aa1d23a958143c |
op_rights |
undefined |
op_doi |
https://doi.org/10.3390/su14159404 |
container_title |
Sustainability |
container_volume |
14 |
container_issue |
15 |
container_start_page |
9404 |
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