Aspergillus niger Biodegradable

Ganji SH, Karigar CS, Pujar BG (1995) Metabolism of dimethylterephthalate by Aspergillus niger. Biodegrad 6 61-66... 

Biological. The pure culture Aspergillus niger biodegraded isophorone to 3,5,5-trimethyl-2-cyclo-hexene-l,4-dione, 3,5,5-trimethylcyclohexane-l,4-dione, (5)-4-hydroxy-3,5,5-trimethyl-2-cyclohex-l-one, and 3-hydroxymethyl-5,5-dimethyl-2-cyclohexen-l-one (Mikami et al, 1981). 

Keywords Biocide, bacteria, fungi, fungicide, microorganism, wood, cellulose, biomass, kinetics, toxicity, cultivation medium, Aspergillus niger, biodegradation. 

In 1913, Knudson (17) reported that tannic acid (the commercial name of the Chinese gall tannin) could be degraded by a strain of Aspergillus niger previously the French scientist Pottevin (in 1900) had named this enzyme tannase (10). Since then, most of the progress on elucidating the mechanisms of hydrolysable tannin biodegradation has occurred since 1960. 

When compound (249) was treated with Aspergillus niger in the presence of 1-aminobenzotriaz-ole, 249 was completely converted into llp,13-dihydro derivative (250) for 3 days however, further biodegradation did not occur for 10 days (Hashimoto et al., 1999, 2001). The same substrate (249) was cultivated with Aspergillus cellulosae IFO to furnish 11,13-dihydro- (250) (82%) for only one day and then the product (250) slowly oxidized into ll,13-dihydro-8P-hydroxycostuslactone (256) (1.6%) from 8 days (Hashimoto et al., 1999, 2001) (Figure 15.78). 

Aliphatic polyesters are the most readily biodegradable systematic polymers. It was found that polyesters derived from diacids of medium size monomers (C6-C12) are more readily degraded by fungi Aspergillus niger and Aspergillus flavus), as well as elastase, than those derived from longer and shorter monomers. " ... 

---