Free radicals function

While this reaction with solvent continues to provide free radicals, these may be less reactive species than the original initiator fragments. We shall have more to say about the transfer of free-radical functionality to solvent in Sec. 6.8. 

G. Majetich and K. Wheless, Tetrahedron, 51, 7095 (1995) for a review on iutramolecular free-radical functionalization. 

A constant observation when the MRP were separated by various methods was that antioxidative effect was found in many different fractions. Both the dialysates and the retentates from dialysis were antioxidative to some extent. All the electrophoresis fractions exhibited some antioxidative effect. Attempts to separate the MRP by column chromatography on Sephadex G-50 have resulted in several fractions with some antioxidative effect, and so on. This indicates that several antioxidative products are formed by the Maillard reaction, possibly differing in molecular size and chemical structure, but perhaps with one single antioxidative functional group in common, such as a free radical function. However, it can not be excluded that the MRP contain a few entirely different antioxidants with different modes of action. Various mechanisms have also been suggested. Eichner (6) claimed MRP to inactivate the hydroperoxides formed by the lipid oxidation. There are also reports on the complex binding of metals by MRP (18, 19). 

Keywords Anthocyanins Free radicals Functionality Proanthocyanidins... 

TABLE 1. Biodegradable poly[(lactic-co-glycolic acid) substrates free radically functionalized with grafted acrylic acid or 2-hydroxylethyl acrylate. 

Majetich, G., Wheless, K. Remote intramolecular free radical functionalizations an update. Tetrahedron 1995, 51, 7095-7129. 

F. Recupero, C. Punta, Free radical functionalization of organic compounds catalyzed by N-hydroxyphthalimide, Chem. Rev. 107 (2007) 3800. 

Majitich G, Wheless K (1995) Remote intramolecular free radical functionalizations An update. Tetrahedron 51 7095-7129. 

Coltelli MB, Passaglia E, Ciardelh F. Formation of short and long chain branches during the free radical functionalization of polyamide 6 in the melt. Polymer 2(X)6 47 85-97. 

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