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Table 1 The effect of soil degradation on the different type of PHB films after 6 weeks

From: Biodegradation of different formulations of polyhydroxybutyrate films in soil

Treatment/films	After treatment^a,b			Before treatment^a,b
Treatment/films	Mw/Mn	Mn	Mw	Mw/Mn	Mn	MW
PHB	1.54 ± 0.11	275 ± 0.06	396 ± 0.19	1.72 ± 0.13	373 ± 0.02	642 ± 0.45
PHB–TiO₂	1.73 ± 0.10	352 ± 0.12	609 ± 0.56	1.82 ± 0.07	370 ± 0.07	674 ± 0.33
PHB nanofiber	1.32 ± 0.03	301 ± 0.07	538 ± 0.81	1.79 ± 0.15	421 ± 0.16	554 ± 0.02
PHB–TiO₂ nanofiber	1.41 ± 0.15	350 ± 0.01	495 ± 0.71	1.78 ± 0.46	389 ± 0.09	624 ± 0.14
PHB (UV)	1.56 ± 0.53	306 ± 0.02	476 ± 0.12	1.79 ± 0.01	339 ± 0.02	606 ± 0.02
PHB–TiO₂ (UV)	1.39 ± 0.04	314 ± 0.02	435 ± 0.15	1.78 ± 0.03	335 ± 0.02	597 ± 0.06

^aThe average and the standard deviation were measured from three parallel studies
^bLSD is at 0.5 level for interaction before and after degradation time for all films types (Mw = 12.301, Mn = 10.312, Mw/Mn = 0.042)

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