Related ArticlesQuantitative analysis of Bordeaux red wine precipitates by solid-state NMR: Role of tartrates and polyphenols.
Food Chem. 2016 May 15;199:229-37
Authors: Prakash S, Iturmendi N, Grelard A, Moine V, Dufourc E
Abstract
Stability of wines is of great importance in oenology matters. Quantitative estimation of dark red precipitates formed in Merlot and Cabernet Sauvignon wine from Bordeaux region for vintages 2012 and 2013 was performed during the oak barrel ageing process. Precipitates were obtained by placing wine at -4°C or 4°C for 2-6days and monitored by periodic sampling during a one-year period. Spectroscopic identification of the main families of components present in the precipitate powder was performed with (13)C solid-state CPMAS NMR and 1D and 2D solution NMR of partially water re-solubilized precipitates. The study revealed that the amount of precipitate obtained is dependent on vintage, temperature and grape variety. Major components identified include potassium bitartrate, polyphenols, polysaccharides, organic acids and free amino acids. No evidence was found for the presence of proteins. The influence of main compounds found in the precipitates is discussed in relation to wine stability.
[NMR paper] Quantitative comparison of structure and dynamics of elastin following three isolation schemes by 13C solid state NMR and MALDI mass spectrometry.
Quantitative comparison of structure and dynamics of elastin following three isolation schemes by 13C solid state NMR and MALDI mass spectrometry.
Related Articles Quantitative comparison of structure and dynamics of elastin following three isolation schemes by 13C solid state NMR and MALDI mass spectrometry.
Biochim Biophys Acta. 2015 Jan 12;
Authors: Papaioannou A, Louis M, Dhital B, Ho HP, Chang EJ, Boutis GS
Abstract
Methods for isolating elastin from fat, collagen, and muscle, commonly used in the design of artificial...
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01-17-2015 04:14 PM
[NMR paper] Quantitative and dynamic analysis of PTEN phosphorylation by NMR.
Quantitative and dynamic analysis of PTEN phosphorylation by NMR.
Quantitative and dynamic analysis of PTEN phosphorylation by NMR.
Methods. 2014 Oct 18;
Authors: Cordier F, Chaffotte A, Wolff N
Abstract
The dual lipid and protein phosphatase PTEN is a tumor suppressor controlling key biological processes, such as cell growth, proliferation and neuro-survival. Its activity and intracellular trafficking is finely regulated notably by multi-site phosphorylation of its C-terminal tail. The reversible and highly dynamic...
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12-03-2014 04:05 PM
Role of Electron Spin Dynamics on Solid-State Dynamic Nuclear Polarization Performance
From The DNP-NMR Blog:
Role of Electron Spin Dynamics on Solid-State Dynamic Nuclear Polarization Performance
Siaw, T.A., et al., Role of Electron Spin Dynamics on Solid-State Dynamic Nuclear Polarization Performance. Phys. Chem. Chem. Phys., 2014.
http://dx.doi.org/10.1039/C4CP02013H
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06-20-2014 08:14 PM
Restraints on backbone conformations in solid state NMR studies of uniformly labeled proteins from quantitative amide 15N–15N and carbonyl 13C–13C dipolar recoupling data
Restraints on backbone conformations in solid state NMR studies of uniformly labeled proteins from quantitative amide 15N–15N and carbonyl 13C–13C dipolar recoupling data
May 2012
Publication year: 2012
Source:Journal of Magnetic Resonance, Volume 218</br>
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Recent structural studies of uniformly 15N, 13C-labeled proteins by solid state nuclear magnetic resonance (NMR) rely principally on two sources of structural restraints: (i) restraints on backbone conformation from isotropic 15N and 13C chemical shifts, based on empirical correlations between chemical shifts and...
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02-03-2013 10:13 AM
Journal Highlight: Quantitative NMR: An applicable method for quantitative analysis of medicinal plant extracts and herbal products
Journal Highlight: Quantitative NMR: An applicable method for quantitative analysis of medicinal plant extracts and herbal products
http://www.spectroscopynow.com/common/images/thumbnails/13abcca009b.jpgA quantitative NMR method has been reported for quantitative analysis of three medicinal plant extracts and their herbal products without the need of authentic standards.
Source: Spectroscopynow.com
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02-03-2013 08:49 AM
Restraints on backbone conformations in solid state NMR studies of uniformly labeled proteins from quantitative amide 15N-15N and carbonyl 13C-13C dipolar recoupling data
Restraints on backbone conformations in solid state NMR studies of uniformly labeled proteins from quantitative amide 15N-15N and carbonyl 13C-13C dipolar recoupling data
Publication year: 2012
Source:Journal of Magnetic Resonance</br>
Kan-Nian Hu, Wei Qiang, Guillermo A. Bermejo, Charles D. Schwieters, Robert Tycko</br>
Recent structural studies of uniformly 15N,13C-labeled proteins by solid state nuclear magnetic resonance (NMR) rely principally on two sources of structural restraints: (i) restraints on backbone conformation from isotropic 15N and 13C chemical...
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03-10-2012 10:54 AM
[NMR paper] Structural role of tyrosine in Bombyx mori silk fibroin, studied by solid-state NMR a
Structural role of tyrosine in Bombyx mori silk fibroin, studied by solid-state NMR and molecular mechanics on a model peptide prepared as silk I and II.
Related Articles Structural role of tyrosine in Bombyx mori silk fibroin, studied by solid-state NMR and molecular mechanics on a model peptide prepared as silk I and II.
Magn Reson Chem. 2004 Feb;42(2):258-66
Authors: Asakura T, Suita K, Kameda T, Afonin S, Ulrich AS
The influence of the bulky and H-bonding Tyr side-chain on its Ala- and Gly-rich environment in Bombyx mori silk fibroin was...
Quantitative analysis of Bordeaux red wine precipitates by solid-state NMR: Role of tartrates and polyphenols.
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