Relationships between sensory perception and water distribution determined by low-field NMR T2 relaxation in processed pork – impact of tumbling and RN− allele

Meat Science ◽  
2005 ◽  
Vol 69 (4) ◽  
pp. 709-720 ◽  
Author(s):  
Anja Hullberg ◽  
Hanne C. Bertram
2015 ◽  
Vol 188 ◽  
pp. 664-672 ◽  
Author(s):  
María Gudjónsdóttir ◽  
Amidou Traoré ◽  
Ásbjörn Jónsson ◽  
Magnea Gudrún Karlsdóttir ◽  
Sigurjón Arason

2016 ◽  
Vol 200 ◽  
pp. 308-314 ◽  
Author(s):  
Jun-Hua Shao ◽  
Ya-Min Deng ◽  
Na Jia ◽  
Ru-Ren Li ◽  
Jin-Xuan Cao ◽  
...  

Foods ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2499
Author(s):  
Xiao Sun ◽  
Jinjie You ◽  
Yan Dong ◽  
Ligen Xu ◽  
Clay J. Maynard ◽  
...  

The scope of this paper was to investigate the effects of water distribution differences on the quality and feasibility of chicken patties supplemented with woody breast (WB). Chicken patties, containing differing amounts of WB (0%, 25%, 50%, 75%, 100%) were analyzed using low-field NMR. Quality differences between chicken patties were further evaluated by combining lipid and protein properties, fry loss (FL), color (L*, a*, b*), texture (hardness, springiness, chewiness, cohesiveness, resilience), microstructure, and sensory characteristics. The results expressed that both lipid and protein oxidation increased and immobilized water in chicken patties can be converted to free water more easily with increasing levels of WB. Additionally, the free water ratio decreased, water freedom increased, and the bound water ratio increased (p < 0.05). Fry loss, color, texture (hardness, springiness, chewiness), microstructure, and sensory (character, organization, taste) characteristics deteriorated significantly when the WB inclusion level exceeded 25%. Particularly, characteristics of texture (chewiness and character) and sensory (character and organization) decreased significantly as WB inclusion increased past 25% (p < 0.01). Furthermore, fry loss, texture, and overall microstructure partially confirmed the moisture variation of chicken patties as the potential cause of the abnormal quality. Although the experimental data expressed that mixing to 35% WB inclusion was feasible, the practical and economic impact recommends inclusion levels to not exceed 30%.


Author(s):  
Qingwen Ni ◽  
Huijie Leng ◽  
Daniel P. Nicolella

Bone quality in terms of water distribution, porosity, and pore size distributions in cortical bone and relate these measures can be used to correlate bone mechanical properties. The objective of this paper is to demonstrate that non-destructive low-field NMR technique can be used to determine the mobile and the bound water distribution, and further determine the loosely and the tightly bound water in cortical bone in vitro.


Author(s):  
Qingwen Ni ◽  
Anahi Tinajero ◽  
Daniel P. Nicolella

A NMR spin-spin (T2) relaxation technique has been described for determining the porosity, mobile and the bound water distribution in baboon cortical bone and correlate to their mechanical properties. The technique of low-field proton NMR involves spin-spin relaxation and free induction decay (FID) measurements, and the computational inversion methods for decay data analysis. The advantages of using NMR T2 relaxation techniques for bone water distribution are illustrated. The CPMG T2 relaxation data can be inverted to T2 relaxation distribution and this distribution then can be transformed to a pore size distribution with the longer relaxation times corresponding to larger pores. The FID T2 relaxation data can be inverted to T2 relaxation distribution and this distribution then can be transformed to bound and mobile water distribution with the longest relaxation time corresponding to mobile water and the middle relaxation time corresponding to bound water. The technique is applied to quantify apparent changes in porosity, bound and mobile water in cortical bone. Overall bone porosity is determined using the calibrated NMR fluid volume from the proton relaxation data divided by overall bone volume. The NMR porosity, bound and mobile water components are determined from cortical bone specimens obtained from baboon donors of different ages, and the results are correlated to bone mechanical properties.


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