12 results match your criteria lignan macromolecule

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Effect of different structural flaxseed lignans on the stability of flaxseed oil-in-water emulsion: An interfacial perspective.

Food Chem 2021 Apr 8;357:129522. Epub 2021 Apr 8.

Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Hubei Key Laboratory of Lipid Chemistry and Nutrition, and Key Laboratory of Oilseeds Processing, Ministry of Agriculture, Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan 430062, China. Electronic address:

The influences of the different structural flaxseed lignans on flaxseed oil (FO) emulsions during storage and digestion were investigated, focusing on their interfacial behavior. From perspective of interface, more than 60% of secoisolariciresinol (SECO) and the acidic hydrolysates of flaxseed lignan macromolecule (FLEH) were located on the interface of FO emulsions. It improved the stability of FO emulsions both during storage and digestion by inhibiting of free radical penetration and improving their targeted antioxidative activity. Read More

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An untargeted liquid chromatography-mass spectrometry-based workflow for the structural characterization of plant polyesters.

Plant J 2020 06 13;102(6):1323-1339. Epub 2020 Feb 13.

Unité de Recherche BIOPI, UMR Transfrontalière BioEcoAgro, Université de Picardie Jules Verne, 80000, Amiens, France.

Cell wall localized heterogeneous polyesters are widespread in land plants. The composition of these polyesters, such as cutin, suberin, or more plant-specific forms such as the flax seed coat lignan macromolecule, can be determined after total hydrolysis of the ester linkages. The main bottleneck in the structural characterization of these macromolecules, however, resides in the determination of the higher order monomer sequences. Read More

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Kinetics of the incorporation of the main phenolic compounds into the lignan macromolecule during flaxseed development.

Food Chem 2017 Feb 16;217:1-8. Epub 2016 Aug 16.

BIOPI EA3900, UPJV, UFR Pharmacie, 1 rue des Louvels, 80000 Amiens, France. Electronic address:

The main flax lignan, secoisolariciresinol diglucoside, is stored in a macromolecule containing other ester-bound phenolic compounds. In this study, NMR and HPLC-UV analyses were performed on flaxseeds harvested at different developmental stages to identify and quantify the main phenolic compounds produced during seed development. Extraction was carried out with or without alkaline hydrolysis to determine if these molecules accumulate in the lignan macromolecule and/or in a free form. Read More

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February 2017

Microwave-assisted extraction of herbacetin diglucoside from flax (Linum usitatissimum L.) seed cakes and its quantification using an RP-HPLC-UV system.

Molecules 2014 Mar 10;19(3):3025-37. Epub 2014 Mar 10.

Laboratoire de Biologie des Ligneux et des Grandes Cultures UPRES EA 1207, Equipe Lignanes des Linacées, Université d'Orléans - Antenne Scientifique Universitaire de Chartres, 21 rue de Loigny la Bataille, 28000 Chartres, France.

Flax (Linum usitatissimum L.) seeds are widely used for oil extraction and the cold-pressed flaxseed (or linseed) cakes obtained during this process constitute a valuable by-product. The flavonol herbacetin diglucoside (HDG) has been previously reported as a constituent of the flaxseed lignan macromolecule linked through ester bonds to the linker molecule hydroxymethylglutaric acid. Read More

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Release of small phenolic compounds from brewer's spent grain and its lignin fractions by human intestinal microbiota in vitro.

J Agric Food Chem 2013 Oct 26;61(40):9744-53. Epub 2013 Sep 26.

VTT Technical Research Centre of Finland , P.O. Box 1000, Tietotie 2, Espoo, Finland.

Brewer's spent grain (BSG), the major side-stream from brewing, is rich in protein, lignin, and nonstarch polysaccharides. Lignin is a polyphenolic macromolecule considered resilient toward breakdown and utilization by colon microbiota, although some indications of release of small phenolic components from lignin in animals have been shown. The aim of this study was to investigate if the human intestinal microbiota can release lignans and small phenolic compounds from whole BSG, a lignin-enriched insoluble fraction from BSG and a deferuloylated fraction, in a metabolic in vitro colon model. Read More

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October 2013

Presence of caffeic acid in flaxseed lignan macromolecule.

Plant Foods Hum Nutr 2011 Sep;66(3):270-4

Division of Food Science, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Olsztyn, Poland.

Phenolic compounds were extracted from defatted flaxseeds using ethanol-dioxane (1:1, v/v). The crude extract obtained was purified using Amberlite XAD-16 column chromatography with water and methanol as mobile phases. RP-HPLC and SE-HPLC showed a lignan macromolecule (LM) as a dominant phenolic compound in the purified extract. Read More

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September 2011

The chain length of lignan macromolecule from flaxseed hulls is determined by the incorporation of coumaric acid glucosides and ferulic acid glucosides.

Phytochemistry 2009 Jan 18;70(2):262-9. Epub 2009 Jan 18.

Laboratory of Food Chemistry, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands.

Lignan macromolecule from flaxseed hulls is composed of secoisolariciresinol diglucoside (SDG) and herbacetin diglucoside (HDG) moieties ester-linked by 3-hydroxy-3-methylglutaric acid (HMGA), and of p-coumaric acid glucoside (CouAG) and ferulic acid glucoside (FeAG) moieties ester-linked directly to SDG. The linker molecule HMGA was found to account for 11% (w/w) of the lignan macromolecule. Based on the extinction coefficients and RP-HPLC data, it was determined that SDG contributes for 62. Read More

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January 2009

Adsorption of a strong polyelectrolyte to model lignin surfaces.

Biomacromolecules 2008 Jul 25;9(7):2081-6. Epub 2008 Jun 25.

Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT, Australia.

The adsorption of a strong, highly charged cationic polyelectrolyte to a kraft lignin thin film was investigated as a function of the adsorbing solution conditions using the quartz crystal microbalance. The polyelectrolyte, PDADMAC, with a molecular weight of 100 kDa and one cationic charge group per monomer, was adsorbed to the anionically charged lignin film in the pH range 3.5-9. Read More

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Metabolism of the lignan macromolecule into enterolignans in the gastrointestinal lumen as determined in the simulator of the human intestinal microbial ecosystem.

J Agric Food Chem 2008 Jun 22;56(12):4806-12. Epub 2008 May 22.

Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University (UGent), Coupure Links 653, B-9000 Gent, Belgium.

Estrogenic plant compounds from the human diet such as the lignan secoisolariciresinol diglucoside (SDG, 1) can exert biological activity in the human body upon ingestion and bioactivation to enterodiol (END, 5) and enterolactone (ENL, 6). Bioavailability of lignans is influenced by the food matrix and gut microbial action, of which the latter is subject to a large interindividual variation. In this study, the fate of the lignan precursor SDG, present in the lignan macromolecule of flax seed ( Linum usitatissimum), was determined during an artificial stomach and small intestinal digestion and during metabolism by two different enterolignan phenotypes in a TWINSHIME environment (TWIN Simulator of the Human Intestinal Microbial Ecosystem). Read More

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Hydroxycinnamic acids are ester-linked directly to glucosyl moieties within the lignan macromolecule from flaxseed hulls.

Phytochemistry 2008 Mar 9;69(5):1250-60. Epub 2008 Jan 9.

Laboratory of Food Chemistry, Wageningen University, PO Box 8129, 6700 EV Wageningen, The Netherlands.

In flaxseed hulls, lignans are present in an oligomeric structure. Secoisolariciresinol diglucoside (SDG), ester-linked to hydroxy-methyl-glutaric acid (HMGA), forms the backbone of this lignan macromolecule. The hydroxycinnamic acids p-coumaric acid glucoside (CouAG) and ferulic acid glucoside (FeAG) are also part of the lignan macromolecule. Read More

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The flavonoid herbacetin diglucoside as a constituent of the lignan macromolecule from flaxseed hulls.

Phytochemistry 2007 Apr 4;68(8):1227-35. Epub 2006 Dec 4.

Laboratory of Food Chemistry, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands.

Lignans in flaxseed are known to be part of a macromolecule in which they are connected through the linker-molecule hydroxy-methyl-glutaric acid (HMGA). In this study, the lignan macromolecule was extracted from flaxseed hulls and degraded to its monomeric constituents by complete saponification. Besides secoisolariciresinol diglucoside (SDG), the phenolic compounds p-coumaric acid glucoside (CouAG) and ferulic acid glucoside (FeAG) were isolated, which was expected based on indications from the literature. Read More

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Towards the specification of consecutive steps in macromolecular lignin assembly.

Phytochemistry 1995 May;39(1):71-9

Institute of Biological Chemistry, Washington State University, Pullman 99164-6340, USA.

When Pinus taeda cell suspension cultures are exposed to 8% sucrose solution, the cells undergo significant intracellular disruption, irregular wall thickening/lignification with concomitant formation of an 'extracellular lignin precipitate. However, addition of potassium iodide (KI), an H202 scavenger, inhibits this lignification response, while the ability to synthesize the monolignols, p-coumaryl and coniferyl alcohols, is retained. Lignin synthesis (i. Read More

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