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. 2014 Dec 4;18(2):355–364. doi: 10.1007/s11743-014-1652-8

Fig. 6.

Fig. 6

Carboxylic intermediate products of nonylphenol monopropoxyethoxylates biodegradation found during the biodegradation test of nonylphenol monopropoxyethoxylate. a Inoculum from a sewage treatment plant, b inoculum from river water