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The persistence of synthetic cyclohexyl- and norbornyl-derived ketones was assessed by using OECD 301F and 301D biodegradation tests. While cyclohexyl-derived ketones either reached or came close to the pass level (60%) after 60d, the corresponding norbornyl derivatives yielded significantly less biodegradation (<40%). By analyzing extracts at 60d, the key degradation products of four norbornyl...
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