In situ investigation of ice fractions and water states during partial freezing of pork loins and shrimps

Ice fractions and water states in partially frozen muscle foods greatly affect their quality. In the study, a variable temperature nuclear magnetic resonance (VT-NMR) with a liquid nitrogen temperature control system was employed to in situ investigate the relationship between ice fractions and temp...

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Veröffentlicht in:Food chemistry 2024-11, Vol.457, p.140089, Article 140089
Hauptverfasser: Zhu, Zhiwei, Zhang, Han, Liu, Xiaohui, Zeng, Qingqing, Sun, Da-Wen, Wang, Zhe
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container_title Food chemistry
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creator Zhu, Zhiwei
Zhang, Han
Liu, Xiaohui
Zeng, Qingqing
Sun, Da-Wen
Wang, Zhe
description Ice fractions and water states in partially frozen muscle foods greatly affect their quality. In the study, a variable temperature nuclear magnetic resonance (VT-NMR) with a liquid nitrogen temperature control system was employed to in situ investigate the relationship between ice fractions and temperatures and changes in water states during partial freezing and thawing of pork and shrimp. Results indicated that changes in ice fractions ranging from −2 ∼ −20 °C could be divided into 3 stages including slow increase, random leap and remarkable leap. More serious damages to the structures related to immobile water occurred in shrimp than in pork, and partial freezing also caused deterioration in muscle fibres related to free water. Additionally, −2 ∼ −3 °C and − 3.5 °C were the appropriate partial freezing temperatures for pork and shrimp, respectively. Therefore, the VT-NMR method possessed great potential for fundamental studies and applications of partial freezing of muscle foods. •An in situ method by variable temperature nuclear magnetic resonance was developed.•Ice fractions and water states during partial freezing (PF) and thawing were studied.•Ice fraction change shows slow increase, random leap and remarkable leap stages.•Suitable PF temperatures for pork of −2 ∼ −3 °C and shrimp of 3.5 °C were obtained.
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Therefore, the VT-NMR method possessed great potential for fundamental studies and applications of partial freezing of muscle foods. •An in situ method by variable temperature nuclear magnetic resonance was developed.•Ice fractions and water states during partial freezing (PF) and thawing were studied.•Ice fraction change shows slow increase, random leap and remarkable leap stages.•Suitable PF temperatures for pork of −2 ∼ −3 °C and shrimp of 3.5 °C were obtained.</description><identifier>ISSN: 0308-8146</identifier><identifier>ISSN: 1873-7072</identifier><identifier>EISSN: 1873-7072</identifier><identifier>DOI: 10.1016/j.foodchem.2024.140089</identifier><identifier>PMID: 38955122</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Animals ; food chemistry ; Food Handling ; Food Preservation - methods ; Freezing ; ice ; Ice - analysis ; Ice fraction ; liquid nitrogen ; Magnetic Resonance Spectroscopy ; muscles ; nuclear magnetic resonance spectroscopy ; Partial freezing ; Penaeidae - chemistry ; pork ; Pork loin ; Seafood - analysis ; Shellfish - analysis ; Shrimp ; Swine ; temperature ; VT-NMR ; Water - analysis ; Water - chemistry ; Water state</subject><ispartof>Food chemistry, 2024-11, Vol.457, p.140089, Article 140089</ispartof><rights>2024 The Authors</rights><rights>Copyright © 2024 The Authors. 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In the study, a variable temperature nuclear magnetic resonance (VT-NMR) with a liquid nitrogen temperature control system was employed to in situ investigate the relationship between ice fractions and temperatures and changes in water states during partial freezing and thawing of pork and shrimp. Results indicated that changes in ice fractions ranging from −2 ∼ −20 °C could be divided into 3 stages including slow increase, random leap and remarkable leap. More serious damages to the structures related to immobile water occurred in shrimp than in pork, and partial freezing also caused deterioration in muscle fibres related to free water. Additionally, −2 ∼ −3 °C and − 3.5 °C were the appropriate partial freezing temperatures for pork and shrimp, respectively. Therefore, the VT-NMR method possessed great potential for fundamental studies and applications of partial freezing of muscle foods. •An in situ method by variable temperature nuclear magnetic resonance was developed.•Ice fractions and water states during partial freezing (PF) and thawing were studied.•Ice fraction change shows slow increase, random leap and remarkable leap stages.•Suitable PF temperatures for pork of −2 ∼ −3 °C and shrimp of 3.5 °C were obtained.</description><subject>Animals</subject><subject>food chemistry</subject><subject>Food Handling</subject><subject>Food Preservation - methods</subject><subject>Freezing</subject><subject>ice</subject><subject>Ice - analysis</subject><subject>Ice fraction</subject><subject>liquid nitrogen</subject><subject>Magnetic Resonance Spectroscopy</subject><subject>muscles</subject><subject>nuclear magnetic resonance spectroscopy</subject><subject>Partial freezing</subject><subject>Penaeidae - chemistry</subject><subject>pork</subject><subject>Pork loin</subject><subject>Seafood - analysis</subject><subject>Shellfish - analysis</subject><subject>Shrimp</subject><subject>Swine</subject><subject>temperature</subject><subject>VT-NMR</subject><subject>Water - analysis</subject><subject>Water - chemistry</subject><subject>Water state</subject><issn>0308-8146</issn><issn>1873-7072</issn><issn>1873-7072</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkUFv2zAMhYViRZO1_QuBjrs4oyxLlm4binUrEGCX9SzIMt0qdSxXsjtsv34yku6aE0HieyQeHyEbBlsGTH7eb7sQWveMh20JZbVlFYDSF2TNVM2LGuryA1kDB1UoVskV-ZjSHgBKYOqKrLjSQrCyXBP_MNDkp5n64Q3T5J_s5MNAQ0e9Q9pF65Y-UTu09LedMNI05ZJoO0c_PNHRxsnbPpOIf5dBVo4hvtA--JMsPUd_GNMNuexsn_D2VK_J4_23X3c_it3P7w93X3eF41pORS0cd0pIJmXjGqt1ox2XEoR2DdOAnDOodXaCGjVrhGxLUK7TyKSoFZb8mnw67h1jeJ2zJ3PwyWHf2wHDnAxngktRAWfnUagFryvOl63yiLoYUorYmTG7svGPYWCWRMzevCdilkTMMZEs3JxuzM0B2_-y9wgy8OUIYH7Km8dokvM4OGx9RDeZNvhzN_4BUMSftg</recordid><startdate>20241101</startdate><enddate>20241101</enddate><creator>Zhu, Zhiwei</creator><creator>Zhang, Han</creator><creator>Liu, Xiaohui</creator><creator>Zeng, Qingqing</creator><creator>Sun, Da-Wen</creator><creator>Wang, Zhe</creator><general>Elsevier Ltd</general><scope>6I.</scope><scope>AAFTH</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7S9</scope><scope>L.6</scope></search><sort><creationdate>20241101</creationdate><title>In situ investigation of ice fractions and water states during partial freezing of pork loins and shrimps</title><author>Zhu, Zhiwei ; 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In the study, a variable temperature nuclear magnetic resonance (VT-NMR) with a liquid nitrogen temperature control system was employed to in situ investigate the relationship between ice fractions and temperatures and changes in water states during partial freezing and thawing of pork and shrimp. Results indicated that changes in ice fractions ranging from −2 ∼ −20 °C could be divided into 3 stages including slow increase, random leap and remarkable leap. More serious damages to the structures related to immobile water occurred in shrimp than in pork, and partial freezing also caused deterioration in muscle fibres related to free water. Additionally, −2 ∼ −3 °C and − 3.5 °C were the appropriate partial freezing temperatures for pork and shrimp, respectively. 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subjects Animals
food chemistry
Food Handling
Food Preservation - methods
Freezing
ice
Ice - analysis
Ice fraction
liquid nitrogen
Magnetic Resonance Spectroscopy
muscles
nuclear magnetic resonance spectroscopy
Partial freezing
Penaeidae - chemistry
pork
Pork loin
Seafood - analysis
Shellfish - analysis
Shrimp
Swine
temperature
VT-NMR
Water - analysis
Water - chemistry
Water state
title In situ investigation of ice fractions and water states during partial freezing of pork loins and shrimps
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