Pentachlorophenol (PCP) has long been used as a wood preservative. Because of the adverse environmental effects of PCP, it has widely contaminated soil and groundwater. In treating PCP, a number of bacteria have been isolated from the environment and applied to bioremediate contaminated areas. However, there is some controversy about the efficiency of PCP removal. This controversy originates in...

2 Powering Stage (Sketch) 2.1 Parameter Effects In this section, we will be sketchy about some details. Entering the powering stage, we have an input constraint graph denoted (G, C). G is an a (n, d, λ)-expander, with λ < d universal constants, and the constraints are over some fixed constant alphabet Σ = Σ0. Our goal is to produce a new constraint graph (G′, C ′) with a larger gap. We will den...