A non-invasive method based on low-field NMR to analyze the quality changes in caviar from hybrid sturgeon (Huso dauricus, Acipenser schrenckiid )

2017 ◽  
Vol 41 (6) ◽  
pp. e13256 ◽  
Author(s):  
Linlin Huang ◽  
Yukun Song ◽  
Tariq Kamal ◽  
Yan Li ◽  
Kexin Xia ◽  
...  
Keyword(s):  
Quality Changes ◽  
Non Invasive ◽  
Low Field ◽  
Hybrid Sturgeon ◽  
Invasive Method ◽  
Low Field Nmr

Estimation of freezing storage time and quality changes in hake (Merluccius merluccius, L.) by low field NMR

2012 ◽  
Vol 135 (3) ◽  
pp. 1626-1634 ◽  
Author(s):  
Isabel Sánchez-Alonso ◽  
Iciar Martinez ◽  
Javier Sánchez-Valencia ◽  
Mercedes Careche
Keyword(s):  
Storage Time ◽  
Quality Changes ◽  
Merluccius Merluccius ◽  
Low Field ◽  
Low Field Nmr ◽  
Freezing Storage

Online monitoring of fermentation processes via non-invasive low-field NMR

2015 ◽  
Vol 112 (9) ◽  
pp. 1810-1821 ◽  
Author(s):  
Dirk Kreyenschulte ◽  
Eva Paciok ◽  
Lars Regestein ◽  
Bernhard Blümich ◽  
Jochen Büchs
Keyword(s):  
Online Monitoring ◽  
Fermentation Processes ◽  
Non Invasive ◽  
Low Field ◽  
Low Field Nmr

Low-field NMR relaxation-exchange measurements for the study of gas admission in microporous solids

2020 ◽  
Vol 22 (24) ◽  
pp. 13689-13697
Author(s):  
Neil Robinson ◽  
Gongkui Xiao ◽  
Paul R. J. Connolly ◽  
Nicholas N. A. Ling ◽  
Einar O. Fridjonsson ◽  
...  
Keyword(s):  
Nmr Relaxation ◽  
Exchange Correlation ◽  
Non Invasive ◽  
Low Field ◽  
Low Field Nmr ◽  
Microporous Solids

We demonstrate how low-field NMR relaxation-exchange correlation measurements permit the non-invasive characterisation of methane exchange dynamics within microporous LTA zeolites.

A non-invasive method for quantitative monitoring of quality changes and water migration in bigeye tuna (Thunnus obesus) during simulated cold chain logistics using low-field nuclear magnetic resonance coupled with PCA

2020 ◽  
Vol 26 (6) ◽  
pp. 475-484
Author(s):  
Xin-Yun Wang ◽  
Jing Xie ◽  
Yun-Fang Qian
Keyword(s):  
Magnetic Resonance ◽  
Cold Chain ◽  
Quality Changes ◽  
Water Migration ◽  
Bigeye Tuna ◽  
Non Invasive ◽  
Low Field ◽  
Thunnus Obesus ◽  
Sensory Score ◽  
Lf Nmr

Bigeye tuna ( Thunnus obesus) is an important fish species worldwide due to its desirable flavour and rich nutrition. Cold chain logistics is one of the most common methods to store and sell bigeye tuna ( Thunnus obesus). The purpose of this study was to investigate how bigeye tuna ( T. obesus) deteriorate during simulated cold chain logistics with fluctuating temperatures by monitoring the quality changes and water distribution. The physical and chemical results showed that the sensory score, texture profile analysis (TPA), and water holding capacity (WHC) decreased, while total volatile basic nitrogen (TVB-N), K value, aerobic plate counts (APC), and psychrotrophic bacterial counts increased with fluctuating temperatures during 132 h. Low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) detection showed that the T21 (trapped water) and proton density decreased, while T22 (free water) decreased initially and then increased, indicating continuous water loss and water migration during storage. Principal component analysis (PCA) revealed that springiness, hardness, chewiness, T21, and sensory score were correlated with each other ( p < 0.05) and the linear combination of quality indicators and T2transverse relaxation time was established. Besides, temperature fluctuation (batch 3) accelerated the deterioration of bigeye tuna according to the comprehensive score of PCA. Results were based on LF-NMR which can be used to monitor quality changes in a fast non-invasive manner.

Malfunctional Reorganization in the Developing Limbo-Prefrontal System in Animals: Implications for Human Psychoses?

2001 ◽  
Vol 12 (1) ◽  
pp. 8-14
Author(s):  
Gertraud Teuchert-Noodt ◽  
Ralf R. Dawirs
Keyword(s):  
Prefrontal Cortex ◽  
Mental Disorders ◽  
Dentate Gyrus ◽  
Cognitive Functions ◽  
Experimental Approach ◽  
Regulatory Mechanisms ◽  
Hippocampal Dentate Gyrus ◽  
Non Invasive ◽  
Invasive Method ◽  
Activity Dependent

Abstract: Neuroplasticity research in connection with mental disorders has recently bridged the gap between basic neurobiology and applied neuropsychology. A non-invasive method in the gerbil (Meriones unguiculus) - the restricted versus enriched breading and the systemically applied single methamphetamine dose - offers an experimental approach to investigate psychoses. Acts of intervening affirm an activity dependent malfunctional reorganization in the prefrontal cortex and in the hippocampal dentate gyrus and reveal the dopamine position as being critical for the disruption of interactions between the areas concerned. From the extent of plasticity effects the probability and risk of psycho-cognitive development may be derived. Advance may be expected from insights into regulatory mechanisms of neurogenesis in the hippocampal dentate gyrus which is obviously to meet the necessary requirements to promote psycho-cognitive functions/malfunctions via the limbo-prefrontal circuit.

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