Estimation of freezing storage time and quality changes in hake (Merluccius merluccius, L.) by low field NMR
The potential of low field NMR (LF NMR) as a fast monitoring technique to estimate the quality of hake (Merluccius merluccius) frozen stored at -10 °C for up to 6 months was evaluated. LF NMR clearly detected three populations of water: water strongly bound to macromolecules (T 2b), trapped water (T 21) and free water (T 22). As storage time increased, and concomitant with an increase in the T 22 and a decrease in the T 21 water populations, the water holding capacity (WHC) and apparent viscosity values decreased and the shear strength increased, reflecting the characteristic loss of juiciness and tougher texture developed by hake during frozen storage. Two mathematical models were constructed: a simple regression using the biexponential analysis of the relaxation times (T 21, T 22) and amplitudes (A 21, A 22) and a partial least square regression (PLS) of CONTIN analysis. Both models seemed suitable to estimate the quality of the product. © 2012 Elsevier Ltd. All rights reserved.
Main Authors: | Sánchez Alonso, Isabel, Martínez, Iciar, Sánchez-Valencia, J. R., Careche, Mercedes |
---|---|
Format: | artículo biblioteca |
Language: | English |
Published: |
Elsevier
2012
|
Online Access: | http://hdl.handle.net/10261/62612 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Low field nuclear magnetic resonance (LF-NMR) relaxometry in hake (Merluccius merluccius, L.) muscle after different freezing and storage conditions
by: Sánchez Alonso, Isabel, et al.
Published: (2013) -
Low-Field Nuclear Magnetic Resonance of Proton (<sup>1</sup>H LF NMR) Relaxometry for Monitoring the Time and Temperature History of Frozen Hake (Merluccius merluccius L.) Muscle
by: Sánchez Valencia, Javier, et al.
Published: (2015) -
Estimation of frozen storage time or temperature by kinetic modeling of the Kramer shear resistance and water holding capacity (WHC) of hake (Merluccius merluccius, L.) muscle
by: Sánchez Valencia, Javier, et al.
Published: (2013) -
Vibrational spectroscopic analysis of hake (Merluccius merluccius L.) lipids during frozen storage
by: Sánchez Alonso, Isabel, et al.
Published: (2012) -
FTIR spectral changes of lipids extracted from hake (Merluccius merluccius, L.) muscle stored at various freezing temperatures
by: Sánchez Alonso, Isabel, et al.
Published: (2013)