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- W2419477918 abstract "Poly-β-hydroxybutyrate (PHB) may serve as one of the imperative substitutes for petroleum derived plastics because of their close functional analogy and biodegradation quality. In the present study, PHB producing ability of bacterial isolates was examined on low-cost agro industrial residues. Isolate PS-10 from domestic waste landfills, identified as Bacillus cereus PS-10 produced and accumulated appreciable amount of PHB. Bacillus cereus PS-10 was capable of using a wide variety of agro-based residues viz. maize bran, rice husk, wood waste, molasses, whey etc. as cost-effective carbon sources for PHB production. Molasses at 3% (w/v) supported maximum PHB production (9.5 gl(-1)) and was followed by glycerol (8.9 gl(-1)) at 2% (w/v). Certain carbon sources like almond shell powder and walnut shell powder are being reported for the first time for PHB production and supported reasonable PHB yield i.e. 6.6 and 4.6 gl(-1), respectively. Different cost-effective nitrogen sources like corn steep liquor, chick pea bran, soy bean meal, mustard cake etc. were used for PHB production. Highest PHB production was observed at pH 7 (9.6 gl(-1)) after 48 hrs of fermentation, although B. cereus PS-10 grew and produced PHB over pH range of 5-9. Optimum inoculum level for maximum PHB production was found to be 5% v/v (A600 0.9; approximately 10(8) cfu ml(-1)). Fourier transform infrared spectroscopy (FT-IR) analysis of the extracted PHB showed characteristic peaks (1721.95, 1632.19 and 2926.43 cm(-1)) similar to standard PHB. Melting point of PHB was found to be 185°C. Bacillus cereus PS-10 may be a sound PHB producer, especially by exploiting low cost substrates." @default.
- W2419477918 created "2016-06-24" @default.
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- W2419477918 date "2015-11-01" @default.
- W2419477918 modified "2023-09-23" @default.
- W2419477918 title "Cost-effective-substrates for production of poly-β-hydroxybutyrate by a newly isolated Bacillus cereus PS-10." @default.
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