No one "invented" the pro-oxidant properties of polyphenols. Many polyphenols, it has been observed, are unstable in aqueous solutions (especially those above pH 7.0) and will oxidize to for a phenolic oxidation product as well as hydrogen peroxide (Halliwell, B., 2003. Oxidative strress in cell culture: an under-appreciated problem? FEBS Lett 540, 3-6). This phenomenon has been observed to interfere in enzymatic assays and can be compensated by the addition of catalase, an enzyme which degrades hydrogen peroxide (de Boer, Vincent C.J., 2006 SIRT1 stimulation by polyphenols is affected by their stability and metabolism. Mechanisms of ageing and development 127, 618-627).
A phenol is a benzene ring with an hydroxl (OH) group attached. A polyphenol is composed of many such phenols strung together. In terms of everyday life, this description doesn't mean much. A number of fruits and vegetables are being studied based on their polyphenol content, as it's thought that these polyphenols may be responsible for the beneficial effects of these products. Pomegranates and grapes (especially in red wine) are known to be high in polyphenols. Eat your fruits and vegetables.
Folin's method measures -OH groups in a sample based on the fact that light absoption increases as OH groups in a sample increases. So, this method do not measure the exact amount of polyphenols because polyphenols are not the only compound has OH group if other OH group containing compounds are in the same medium such as protein, carbohyrate, vitamin C, and saponin.
automatically updated properties
Deuterium, also known as heavy hydrogen, exhibits three separate properties: Physical properties, quantum properties and nuclear properties (the deuteron).
The differences in chemical properties are not significant (excepting protium and deuterium); the physical properties are different.
An array of bioflavonoids (quercetin, catechins, flavonols, and anthocyanidins) and nonbioflavonoid polyphenols (acid derivatives), resveratrol.
Polyphenols are antioxidants found naturally and reverse damage caused by free radicals.
The physical properties of materials are not invented, they are intrinsic, natural, specific characteristics of any material.
The triangle was not invented. It is the result of observations of physical properties.
If someone wanted to learn about polyphenols they should study bio-chemistry , because polyphenols are polymers of catechin and epicatechin, belonging of the family of condensed tannins.
Edvard Larouge
Lemon balm contains volatile oils, including citral, citronella, eugenol, and other components as well as flavonoids, triterpenoids, rosmarinic acid, polyphenols, and tannin.
Polyphenols are determined by a benzene ring containing a carbolic acid (-OH) group. This will be bonded to the ring with an sp hybridized carbon.
removal of polyphenols
Antifreeze properties of some liquids were known about long before cars were invented.
Likely because of chlorophyll, polyphenols, and other chemicals.
No one invented time. It is one of the fundamental properties and dimensions of the universe we inhabit.