비의류제품

Evaluation of Biodegradable Plastics by Carbon 13.

  • 출판일1994.02
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 434
Rsearchers developed a method to measure the deterioration rate of biodegradable plastics in soil. The method depended on the amount of carbon 13 present in carbon dioxide emissions from radioactively tagged, microbially produced poly(3-hydroxybutyrate) (PHB). The researchers prepared PHB film samples (area of 25 square centimeters, weight of 50 milligrams) from Alcaligenes eutrophus cells and sodium acetate/carbon 13, buried the films in soils that had been taken from locations throughout Japan, and placed the film/soil mixtures in metal flasks for 15 days. Periodic chromatographic analyses of gases within the flasks revealed that, on the average, the carbon 13 content of emitted carbon dioxide increased from 1 percent to 15 percent, confirming biodegradation at a rate of 1 percent per day. 6 refs.
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