Active oxygen scavenger

Hanasaki Y, Ogawa S, Fukui S. 1994. The correlation between active oxygens scavenging and antioxidative effects of flavonoids. Free Radic Biol Med 16 845-850. 

Saruyama, H., and M. Tanida. 1995. Effect of chilling on activated oxygen-scavenging enzymes in low temperature-sensitive and tolerant cultivars of rice (Oryza sativa L.). Plant Sci. 109 105-113. 

Hanasaki, Y.. Ogawa. S.. and Fukui. S. (1994) The Correlation Between Active Oxygen Scavenging and Antioxidative Effects of Flavonoids. Free. Radic. Biol. Med. 16.845-850. 

Studies show that Nylon-6/clay nanocomposites can achieve an OTR (oxygen transmission rate) almost four times lower than unfilled nylon-6 [32]. In the case of Honeywell Aegis OX, the nanoclay layers act as a trap to retain the active oxygen scavengers in the polymer while reducing OTR 100-fold [291]. Imperm , produced by Mitsubishi Gas Chemical Company, has similar results when added to a multilayer PET structure. Imperm s oxygen barrier is two times the standard Nylon MXD6 and its carbon... 

Ozone has been shown to inhibit photosynthesis (8-10) and cause changes in the chloroplastic activated oxygen scavenging system (3, 11) implying action at the chloroplast level. 

The active-oxygen scavenging system in plants consists of five enzymes si )eroxide dismutase (SOD), glntathlcaie reductase, dehydroascorbate reductase, monod ydroascorbate reductase, and ascorbate peroxidase (reviewed in 8). 

USE As UV-absorbers for sunscreens and other products [8397] as active oxygen scavengers for therapeutic uses [8398]. 

Tannin blend concentrates primarily intended for oxygen-scavenging duty in steam boilers. They generally are offered as dark-brown to black, blended products of 25 to 50% active strength. Here, tannins provide an additional benefit of sludge conditioning at no extra cost. 

Honeywell has also been active in developing a combined active-passive oxygen barrier system for polyamide-6 materials [201]. Passive barrier characteristics are provided by nanoclay particles incorporated via melt processing techniques, while active contribution comes from an oxygen-scavenging ingredient (undisclosed). Oxygen transmission results reveal substantial... 

Handehnan, G.J., Carotenoids as scavengers of active oxygen species, in Handbook of Antioxidants, Cadenas, E. and Packer, L., Eds., Marcel Dekker, New York, 1996, 259. 

Craven, P.A., Pfanstiel, J., Saito, R. and DeRubertis, F.R. (1987). Actions of sulfasalazine and 5-aminosalisylic acid as reactive oxygen scavengers in the suppression of bile acid-induced increases in colonic epithelial cell loss and proliferative activity. Gastroenterology 92, 1998-2008. 

Hu Z, Guan WC, Tang XY, Huang LZ, Xu H (2007) Synthesis of water-soluble cystine C derivative with catalyst and its active oxygen radical scavenging ability. Chin. Chem. Lett. 18 51-54. 

Flavonoids have the ability to act as antioxidants by a free radical scavenging mechanism with the formation of less reactive flavonoid phenoxyl radicals [Eq. (1) and (2)]. On the other hand, through then-known chelating ability these compounds may inactivate transition metals ions (iron, copper), thereby suppressing the superoxide-driven Fenton Reaction, Eqs. (3) and (4), which is currently believed to be the most important route to activate oxygen species [51]. 

Fig. 1. Schematic diagram showing the different mechanisms of action proposed for the antiulcer action of flavonoids. 1. Blockade of add secretion by decreasing histamine production or inhibiting the proton pump. 2. Bactericidal effect on H. pylori. 3. Antioxidative activity by scavenging free radicals and preventing ROM formation. 4. Potentiation of the mucosal protective factors. PAF platelet activating factor ROM reactive oxygen metabolites H2 histamine receptor 2 M muscarinic receptor G gastrin receptor.

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