Millions of dollars are spent each year to replace decayed marine piling. The primary avenue of decay infection is through the ends where untreated wood is exposed after piles are cut off. Thus, several fungicides were evaluated for their ability to protect the top cutoff end of creosoted Douglas-fir piles from decay. Supple­ mentary treatment with a 20 percent ammonium bi­ fluoride solution or...

Vitamin B(12), reduced by titanium (III) citrate to vitamin B(12s), catalyzes the reductive dechlorination of chlorophenols. Reductive dechlorination of pentachlorophenol and of all tetrachlorophenol and trichlorophenol isomers was observed. Reaction of various chlorophenols with vitamin B(12) favored reductive dechlorination at positions adjacent to another chlorinated carbon, but chlorines or...

The chlorophenols have disinfectant-like tastes, detectable in water in concentrations ranging from 0.04 parts per billion (ppb) for 2, 6-dichlorophenol to 30 ppb for pentachlorophenol (PCP). The chlorophenols are soluble in most organic solvents and are slightly soluble in water. Chlorocresols share the disinfectantchemical taste of the chlorophenols, and may have even lower taste threshold va...

Pseudomonas aeruginosa is a ubiquitous environmental bacterium and an opportunistic pathogen with the ability to rapidly develop multidrug resistance under selective pressure. Previous work demonstrated that upon exposure to the environmental contaminant pentachlorophenol (PCP), P. aeruginosa PAO1 increases expression of multiple multidrug efflux pumps, including the MexAB-OprM pump. The curren...

Polyurethane-immobilized Flavobacterium cells (ATCC 39723) degraded pentachlorophenol (PCP) at initial concentrations as high as 300 mg liter-1. The reversible binding of PCP to the polyurethane was shown to be important in the protection of the cells from inhibition of PCP degradation. The degradation activity of the bacteria was monitored for 150 days in semicontinuous batch reactors. The deg...