Keywords: Irspec1.jpg IR spectrum showing carbonyl absorption due to oxidative degradation of polypropylene crutch moulding 2008-04-21 own User Peterlewis Peterlewis en Original upload log en wikipedia ftcg page en wikipedia Irspec1 jpg wikitable - 16 38 21 April 2008 1 138 × 865 43 254 bytes Peterlewis w en <nowiki> own spectrum from casebook </nowiki> Uncategorized 2013 April 26 |