Degradation forms

Hemosiderin is a somewhat ill-defined molecule it appears to be a pardy degraded form of ferritin but still containing iron. It can be detected by histologic stains (eg, Pmssian blue) for iron, and its presence is determined histologically when excessive storage of iron... 

Soil. Lu et al. (1977) studied the degradation of benzo [a] pyrene in a model ecosystem containing Drummer silty clay loam. Samples were incubated at 27.6 °C for 1, 2, and 4 wk before extraction with acetone for TLC analysis. After 4 wk, only 8.05% of benzo [a] pyrene degraded forming one polar compound and two unidentified compounds. The reported half-lives for benzo [a] pyrene in a Kidman sandy loam and McLaurin sandy loam are 309 and 229 d, respectively (Park et al., 1990). 

Biological. When incubated with raw sewage and raw sewage acclimated with hydrocarbons, benzyl chloride degraded forming nonchlorinated products (Jacobson and Alexander, 1981). 

Photolytic. Low et al. (1991) reported that nitro-containing compounds (e.g., 2,4-dinitrophenol) degrade via UV light in the presence of titanium dioxide yielding ammonium, carbonate, and nitrate ions. By analogy, 2,4-dinitrotoluene should degrade forming identical ions. 

Photolytic. Pelizzetti et al. (1990) studied the aqueous photocatalytic degradation of prometon and other s-triazines (ppb level) using simulated sunlight (7, >340 nm) and titanium dioxide as a photocatalyst. Prometon rapidly degraded forming cyanuric acid, nitrates, the intermediate tentatively identified as 2,4-diamino-6-hydroxy-7V,A -bis(l-methylethyl)-s-triazine, and other intermediate compounds similar to those found for atrazine. Mineralization of cyanuric acid to carbon dioxide was not observed. 

T riterp. azadirachtin-like tetranortritero. azadirachtin (neem teee,Azadirachta indicaA. Juss., Meliaceae, Ang. MI) Quassinoids (biosynthetically related to triterp.) including seco- and further degraded forms Quassia amara L., Sapindales, Ang. from Jamaica quassin DSII, and other metabolites Connolly 1997). 

As applied to 4, 5, 6, and 7, the Wohl degradation forms enantiomers of glyceraldehyde ... 

Zhao ZZ, Qin X-Z, Wu A, Yuan Y. Novel rearrangements of an N-oxide degradate formed from oxidation of a morpholine acetal substance P antagonist. J Pharm Sci 2004 93(8) 1957-1961. 

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