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March 28, 2020 12:45 am

Scientists Identify Microbe That Could Help Degrade Polyurethane-Based Plastics

An anonymous reader quotes a report from Phys.Org: German researchers report in the journal Frontiers in Microbiology that they have identified and characterized a strain of bacteria capable of degrading some of the chemical building blocks of polyurethane. The team out of Germany managed to isolate a bacterium, Pseudomonas sp. TDA1, from a site rich in brittle plastic waste that shows promise in attacking some of the chemical bonds that make up polyurethane plastics. The researchers performed a genomic analysis to identify the degradation pathways at work. They made preliminary discoveries about the factors that help the microbe metabolize certain chemical compounds in plastic for energy. They also conducted other analyses and experiments to understand the bacterium's capabilities. This particular strain is part of a group of bacteria that are well-known for their tolerance of toxic organic compounds and other forms of stress, according to Dr. Christian Eberlein with the Helmholtz Centre for Environmental Research-UFZ. He is a co-author on the paper who coordinated and supervised the work. "That trait is also named solvent-tolerance and is one form of extremophilic microorganisms," he said. In addition to polyurethane, the P4SB consortium, which includes the Helmholtz Centre for Environmental Research-UFZ, is also testing the efficacy of microbes to degrade plastics made of polyethylene terephthalate (PET), which is widely used in plastic water bottles.

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