The Daryal contained organic pollutant polychlorinated biphenyl in its capacitors. Tests of the landfill indicate polychlorinated biphenyl (PCB) contamination. Populations have developed resistance to methylmercury, kepone, dioxins, polychlorinated biphenyl, and polyaromatic hydrocarbons. A polychlorinated biphenyl (PCB) is an organic chlorine compound with the formula CHCl. Some bacteria are able to hydroxylate biphenyl and its polychlorinated biphenyls (PCBs). This is a complete list of polychlorinated biphenyl (PCB) congeners. Historically, pole-mounted transformers were filled with a polychlorinated biphenyl (PCB) liquid. The biphenyl molecule consists of two connected phenyl rings. Paint was found to contain polychlorinated biphenyl (PCB), but not above landfill limits. Formerly, distribution transformers for indoor use would be filled with a polychlorinated biphenyl (PCB) liquid. Dieldrin and polychlorinated biphenyl are pollutants in the environment that have impacted eagle populations. Recent work suggests polychlorinated biphenyl (PCB) pollution may be a factor in the decline. This agreement also included a cleanup program for polychlorinated biphenyl (PCB). XPhos is a phosphine ligand derived from biphenyl. SPhos is a phosphine ligand derived from biphenyl.