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Natural polyphenols have long been proposed as renewable precursors to produce plastics or resins by polymerization with formaldehyde, [33] as well as adhesives for particleboards. [34] The aims are generally to make use of plant residues from grape, olive (called pomaces), or pecan shells left after processing. [14]
Isoflavones (phytoestrogens) use the 3-phenylchromen-4-one skeleton (with no hydroxyl group substitution on carbon at position 2). Daidzein (formononetin) soy, alfalfa sprouts, red clover, chickpeas, peanuts, kudzu, other legumes. Genistein (biochanin A) soy, alfalfa sprouts, red clover, chickpeas, peanuts, other legumes. Glycitein soy. Isoflavanes
Ellagic acid is found in edible nuts. [8] It is also found in oak species such as the North American white oak (Quercus alba) and European red oak (Quercus robur).[9]The macrophyte Myriophyllum spicatum produces ellagic acid.
Phenol – the simplest of the phenols Chemical structure of salicylic acid, the active metabolite of aspirin Chemical structure of aloe emodin, a diphenol Quercetin, a typical flavonoid, is a polyphenol Tannic acid, a typical polyphenol of indeterminate structure Lignin, is around 25% of the composition of wood This structure is repeated many ...
Tomato paste. Tomato paste is a thick paste made from tomatoes, which are cooked for several hours to reduce water content, straining out seeds and skins, and cooking the liquid again to reduce the base to a thick, rich concentrate. [1] It is used to impart an intense tomato flavour to a variety of dishes, such as pasta, soups and braised meat.
Phenolic compounds are classified as simple phenols or polyphenols based on the number of phenol units in the molecule. Phenol – the simplest of the phenols Chemical structure of salicylic acid, the active metabolite of aspirin. Phenols are both synthesized industrially and produced by plants and microorganisms. [2]
Flax seeds and sesame seeds contain high levels of lignans. [1] [8] The principal lignan precursor found in flaxseeds is secoisolariciresinol diglucoside.[1] [8] Other foods containing lignans include cereals (rye, wheat, oat and barley), soybeans, tofu, cruciferous vegetables, such as broccoli and cabbage, and some fruits, particularly apricots and strawberries. [1]
Fisetin (7,3′,4′-flavon-3-ol) is a plant flavonol from the flavonoid group of polyphenols. [1] It occurs in many plants where it serves as a yellow pigment.It is found in many fruits and vegetables, such as strawberries, apples, persimmons, onions, and cucumbers.