Fig. 3: Characterization of depolymerization of EPS debris changes in the gut of clamworms and excreted EPS frass. | Communications Earth & Environment

Fig. 3: Characterization of depolymerization of EPS debris changes in the gut of clamworms and excreted EPS frass.

From: Polystyrene-degrading bacteria in the gut microbiome of marine benthic polychaetes support enhanced digestion of plastic fragments

Fig. 3

a Gas chromatography-mass spectrometry (GC-MS) analysis of the plastic samples (EPS control), the intestine and fresh frass of EPS-eating clamworms. Compounds in figure: 1. Benzoic acid,3,5-bis(1,1-dimethylethyl)-4-hydroxy (C15H22O3) 2. Phenol,2,6-bis(1,1-dimethylethyl)-4-ethyl) (C16H26O); 3.Hexadecanoic acid, methyl ester) (C17H34O2); 4. Eicosanoic acid (C20H40O2); 5. 4-methyl-2,6-ditert-pentylphenol (C16H26O). b µFTIR transmittance spectra of the EPS control and the EPS debris in the gut after digestion from 500-4000 cm−1. c Molecular weight distribution shifts of EPS control and EPS frass. d (i-ii) 1H NMR analysis of EPS frass showed it had a increase in the number of peaks in the aliphatic signal region (1-2 ppm) and aromatic portions (6-7 ppm) versus the EPS control. e FT-IR transmittance spectra of the EPS control and the extracted EPS frass from 500-4000 cm−1.

Back to article page