The effects of chlorinated benzene compounds on marine animals are not well known. Until recently, only hexachlorobenzene (HCB) had received attention in pollution studies: In a report published by the National Academy of Sciences (1975) this substance is labelled a marine pollutant of special concern. Last year. Project scientists analyzed municipal wastewater samples for HCB and three other c...

The incorporation of nitrogen atoms into the aromatic ring of phenolic compounds has enabled the development of some of the most potent radical-trapping antioxidants ever reported. These compounds, 3-pyridinols and 5-pyrimidinols, have stronger O-H bonds than equivalently substituted phenols, but possess similar reactivities toward autoxidation chain-carrying peroxyl radicals. These attributes ...

X-Ray analyses of free base, zinc, and nickel complexes of 2,3;7,8;12,13;17,18-tetrakis(6,13-dihydro-6,13-pentaceno)-21H,23H-porphine revealed that the porphyrin chromophores adopted a heavily-saddled conformation by interlocking of the biconcave porphyrins in the crystals containing halobenzenes as crystalline solvents, while the ring was almost flat in the crystals obtained from benzene or fr...

Mycobacterium vaccae can catabolize a number of major groundwater pollutants. When added singly, acetone, cyclohexane, styrene, benzene, ethylbenzene, propylbenzene, dioxane, and 1,2-dichloroethylene can be catabolized by M. vaccae. Catabolism of a number of these chemicals was monitored by gas-chromatographic analysis. Gas-chromatographic analysis indicated that the products of benzene degrada...

BACKGROUND Oxygenases catalyze the hydroxylation of a wide variety of organic substrates. An ability to alter oxygenase substrate specificities and improve their activities and stabilities using recombinant DNA techniques would expand their use in processes such as chemical synthesis and bioremediation. Discovery and directed evolution of oxygenases require efficient screens that are sensitive ...

The dechlorination of chlorine containing hydrocarbons in pyrolysis vapor is poorly understood. In order to shed new light on the mechanism, a model mixture composed iso-octane doped with 2-chlorobutane, 2-chloroethylbenzene, and chlorobenzene was used study chlorinated by alkali adsorption. These three were selected as they can be typically produced from mixed plastic waste polyvinyl chloride ...

In the course of our synthetic studies on biologically active compounds using dimedone, tetronic acids, and tetramic acids,1) we reported that some 10-substituted 3,3-dimethyl3, 4, 9, 10tetrahydro1Hfuroand -pyrrolo [4, 3-b] [1, 5] benzodiazepin1-ones (1 and 2) showed analgesic activity as strong as that of aminopyrine in the phenylquinone writhing test in mice.2) Namely, the extents of inhibiti...