Related ArticlesEffect of Different Cooking Methods on Proton Dynamics and Physicochemical Attributes in Spanish Mackerel Assessed by Low-Field NMR.
Foods. 2020 Mar 21;9(3):
Authors: Sun S, Wang S, Lin R, Cheng S, Yuan B, Wang Z, Tan M
Abstract
The states of protons within food items are highly related to their physical attributes. In this study, the effect of cooking methods including boiling, steaming, roasting and frying on proton dynamics, physicochemical parameters and microstructure of Spanish mackerel was assessed by low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) techniques. The treatment of cooking resulted in a significant reduction of proton mobility and declined freedom of protons. The state changes of protons can be monitored easily in an intuitive and non-destructive manner during various cooking process. The treatments of boiling, steaming, roasting and frying resulted in different cooking loss and similar water-holding capability. A significant increase of total carbonyl content and thiobarbituric acid reactive substances was found, while a decrease of the values for free thiols and surface hydrophobicity was observed. The analysis of circular dichroism spectroscopy and cryo-scanning electron microscopy showed significant structural change. The correlation coefficients of Rcal2 and Rcv2 from partial least squares (PLS) regression models were more than 0.980, suggesting good correlation between LF-NMR data and hardness, resilience, springiness, chewiness, gumminess, and adhesiveness. Good recoveries and a relatively small coefficient of variation (CV) were obtained from the PLS regression models, indicating good reliability and accuracy in predicting texture parameters for mackerel samples.
PMID: 32245181 [PubMed - as supplied by publisher]
3-O-Methyl- d -glucose mutarotation and proton exchange rates assessed by 13 C, 1 H NMR and by chemical exchange saturation transfer and spin lock measurements
3-O-Methyl- d -glucose mutarotation and proton exchange rates assessed by 13 C, 1 H NMR and by chemical exchange saturation transfer and spin lock measurements
Abstract
3-O-Methyl-d-glucose (3OMG) was recently suggested as an agent to image tumors using chemical exchange saturation transfer (CEST) MRI. To characterize the properties of 3OMG in solution, the anomeric equilibrium and the mutarotation rates of 3OMG were studied by 1H and 13C NMR. This information is essential in designing the in vivo CEST experiments. At room temperature, the ratio...
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11-25-2018 06:02 AM
Molecular dynamics-based selectivity for Fast-Field-Cycling relaxometry by Overhauser and solid effect dynamic nuclear polarization #DNPNMR
From The DNP-NMR Blog:
Molecular dynamics-based selectivity for Fast-Field-Cycling relaxometry by Overhauser and solid effect dynamic nuclear polarization #DNPNMR
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Neudert, O., C. Mattea, and S. Stapf, Molecular dynamics-based selectivity for Fast-Field-Cycling relaxometry by Overhauser and solid effect dynamic nuclear polarization. J. Magn. Reson., 2017. 276: p. 113-121.
http://www.sciencedirect.com/science/article/pii/S1090780717300204
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05-23-2017 04:44 AM
Field-frequency locked X-band Overhauser effect spectrometer #DNPNMR
From The DNP-NMR Blog:
Field-frequency locked X-band Overhauser effect spectrometer #DNPNMR
This article is already a bit older. However, it nicely illustrates that DNP, specifically ODNP has been around for a while already, and gives some interesting specifics on the instrumentation that are still valid today.
Chandrakumar, N. and P.T. Narasimhan, Field-frequency locked X-band Overhauser effect spectrometer. Review of Scientific Instruments, 1981. 52(4): p. 533-538.
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04-11-2017 04:25 AM
[NMR paper] Effect of organochlorine pesticides exposure on the maize root metabolome assessed using high-resolution magic-angle spinning (1)H NMR spectroscopy.
Effect of organochlorine pesticides exposure on the maize root metabolome assessed using high-resolution magic-angle spinning (1)H NMR spectroscopy.
Effect of organochlorine pesticides exposure on the maize root metabolome assessed using high-resolution magic-angle spinning (1)H NMR spectroscopy.
Environ Pollut. 2016 Apr 28;214:539-548
Authors: Blondel C, Khelalfa F, Reynaud S, Fauvelle F, Raveton M
Abstract
(1)H-HRMAS NMR-based metabolomics was used to better understand the toxic effects on maize root tips of...
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05-02-2016 11:33 AM
VII Biennial Meeting of the NMR Group of the Spanish Royal Society of Chemistry
VII Biennial Meeting of the NMR Group of the Spanish Royal Society of Chemistry
http://www.spectroscopynow.com/common/images/thumbnails/1453c5db8b4.jpgVII GERMN Biennial Meeting / IV Iberian NMR Meeting / VI Iberoamerican NMR Meeting
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04-07-2014 06:59 PM
Why Are Lobsters Blue, and Why Does Cooking Turn Them Red? - New York Times
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Why Are Lobsters Blue, and Why Does Cooking Turn Them Red?
New York Times
... the wavelengths of light that are absorbed. Using nuclear magnetic resonance imaging and spectroscopy to examine protein-pigment interactions, the researchers found that this effect was a large one, suggesting that it is the primary source of ...
Why Are Lobsters Blue, and Why Does Cooking Turn Them Red? - New York Times
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09-17-2013 08:35 AM
Metabolic characterization of Palatinate German white wines according to sensory attributes, varieties, and vintages using NMR spectroscopy and multivariate data analyses
Metabolic characterization of Palatinate German white wines according to sensory attributes, varieties, and vintages using NMR spectroscopy and multivariate data analyses
Abstract 1H NMR (nuclear magnetic resonance spectroscopy) has been used for metabolomic analysis of â??Rieslingâ?? and â??Mueller-Thurgauâ?? white wines from the German Palatinate region. Diverse two-dimensional NMR techniques have been applied for the identification of metabolites, including phenolics. It is shown that sensory analysis correlates with NMR-based metabolic profiles of wine. 1H NMR data in combination...
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03-03-2011 02:06 AM
[NMR paper] Proton NMR studies of the structural and dynamical effect of chemical modification of
Proton NMR studies of the structural and dynamical effect of chemical modification of a single aromatic side-chain in a snake cardiotoxin. Relation to the structure of the putative binding site and the cytolytic activity of the toxin.
Related Articles Proton NMR studies of the structural and dynamical effect of chemical modification of a single aromatic side-chain in a snake cardiotoxin. Relation to the structure of the putative binding site and the cytolytic activity of the toxin.
J Mol Biol. 1994 Nov 4;243(4):719-35
Authors: Roumestand C, Gilquin B,...
Effect of Different Cooking Methods on Proton Dynamics and Physicochemical Attributes in Spanish Mackerel Assessed by Low-Field NMR.
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