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Polyphenols lignans

Bioactive polyphenol acids and lignans with 0-heterocyclic fragments and terpenoid 8-lactones as components of traditional Chinese drugs 98PAC547. [Pg.231]

Phloem powder is rich in different types of fibers, lignans and polyphenols (Table 14.1). Phloem contains 58 g of fiber per 100 g, of which 51 g is insoluble and a lesser amount ( 7 g) is water-soluble. The total amount of different lignans in phloem is 79.3 mg/100 g, consisting mainly (98%) of secoisolariciresinol. The main flavonoids in phloem are catechins, and the... [Pg.281]

Plant-derived products Polyphenols (derivatives of hydroxycinnamic acid, hydroxybenzoic acid, flavonols,3 flavones,3 anthocyanidins,3 flavanols,3 isoflavones,3 flavanones,3 stilbenes, lignans), glucosynolates, carotenoids (am /3-, y-, 8-carotene, lycopene, luthein, xeaxantin, canthaxantin), phytic acid, allicin... [Pg.218]

Polyphenols (PP) represent a very wide variety of about 6000 compounds divided into I I different classes represented by hydroxybenzoic acids, hydroxycinnamic acid, anthocyanidins, flavonols, flavanones, flavanols (divided into monomeric cathechins and polymeric proanthocyanidins3), flavones, isoflavones, stilbenes, and lignans (16). [Pg.224]

Nutrient Content high in protein, prebiotic and insoluble fiber, lignans, antioxidant vitamins A and C, dietary minerals, phytosterols Phytochemical Content high in total carotenoids and polyphenols (anthocyanins, catechins, proanthocyanidins, chlorogenic acid)... [Pg.109]

Overall, the research effort to identify health properties of the dried plum relies on two primary signatures for superfruit status—dietary fiber and mixed polyphenols. A Japanese research group has done much of the work on polyphenols, establishing a list of candidates for antioxidant or other cellular effects of prune compounds. Oligomeric proanthocyani-dins, chlorogenic acid, caffeoylquinic acid, various other phenolic acids, and lignans have exhibited antioxidant activity in test-tube studies. Each of these compounds is under research for potential beneficial roles supporting human health. [Pg.111]

S Nishibe. Lignans as Bioactive Components in Traditional Medicines. In A Scalleert ed. Polyphenolic Phenomena. Paris INRA Editions, 1993, pp. 247-255. [Pg.619]

S Nishibe. Bioactive Lignans and Flavonoids from Traditional Medicines. In R Brouillord, M Jay, A Scalbert, eds. Polyphenols 94, Paris INRA Editions, 1994, pp. 113-122. [Pg.619]

Oxidative cellular damage by reactive oxygen species such as superoxide anion, hydroperoxy and hyassociated with various human chronic diseases, e.g. cancers, inflammation, arthritis, atherosclerosis and also with the process of ageing. Claims that diet and increased intake of nutrients exhibiting antioxidative activity have a preventative effect on chronic diseases have increased in recent years. In this context, polyphenolic compounds such as tannins, flavonoids, coumarins, lignans and caffeic acid derivatives, which are abundantly contained in a large number of medicinal plants, foods and beverages, are of particular interest for human health care because of the antioxidative properties widely found in plant phenolics. The antioxidative activity of tannins has been extensively studied in various in vitro and in vivo experimental systems and summarized in reviews [96, 97]. Such activity includes the inhibition of lipid peroxidation induced by NADPH-ADP and ascorbic acid-ADP in rat liver microsomes and mitochondria, respectively... [Pg.442]

Polyphenols include flavonoids, proanthocyanidins, stilbenes, microbial metabolites of lignan, and hydroxycinnamates (Fig. 2). Flavonoid metabolism, while still far from being fully understood, has been the most widely studied and will therefore form the basis of this chapter. Six main subclasses of flavonoids are widely consumed by humans flavonols, flavones, flavanones, isoflavonoids, flavanols (catechins), and anthocyanins these posses the generic structure shown in Fig. 3. These classes differ in the degree of saturation and the nature and position of reactive groups on their three rings examples of substitution patterns for selected flavonoids are given in Table 1. [Pg.51]

Figure 2 Chemical structures of selected plant polyphenols. Structures include a flavonol (quercetin), isoflavone (daidzein), cinnamic acid (chlorogenic acid), flavan-3-ol (catechin), a lignan microbial metabolite (enterodiol), and a stilbene (resveratrol). Figure 2 Chemical structures of selected plant polyphenols. Structures include a flavonol (quercetin), isoflavone (daidzein), cinnamic acid (chlorogenic acid), flavan-3-ol (catechin), a lignan microbial metabolite (enterodiol), and a stilbene (resveratrol).
In summary, anodic oxidation has been applied quite successfully to biogenetic type syntheses of alkaloids and, to some extent, lignans. It has not been applied in any degree to the synthesis of other types of polyphenols and pigments. [Pg.181]

Benzene-acetone (90 + 10) A Coumarins, polyphenol acetates, lignans, methyl ethers [203, 238]... [Pg.694]

A straightforward classification attempts to divide the broad category of phenolics into simple phenols and polyphenols, based exclusively on the number of phenol subunits present, but many plant phenolic compounds are polymerized into larger molecules. Thus, the term plant phenolics encompasses simple phenols, phenolic acids, coumarins, flavonoids, stilbenes, hydrolyzable and condensed tannins, lignans, and hgnins [4]. [Pg.1953]


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See also in sourсe #XX -- [ Pg.247 ]




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