| 摘要 |
<p>PURPOSE:To degrade a natural or synthetic isoprene rubber article powerfully within a short time, by culturing micro-organisms which can degrade and utilize the above specified rubber article in a medium containing the rubber articles as the chief carbon source and degrading it. CONSTITUTION:A synthetic or natural isoprene rubber article having a crosslinking density <=about 4X10<19>cm<2> or having an equilibrium degree of swelling in benzene at 25 deg.C>= about 4 is degradated by culturing microorganisms belonging to the genus Nocardia or Rhodococcus and being able to degrade and utilize the rubber in a medium containing the rubber ariticles as the chief carbon source. The strains which can be applied are designated as strain NR265, strain NR-34A and strain NR-35A and are deposited with the Fermentation Research Institute. From their mycological natures, it is presumed that strain NR-26S belongs to the genus. Rhodococcus, strain NR-34A to the genus. Nocardia, and strain NR-35A to the genus Nocardia.</p> |
