Effect of fermentation conditions on lipase production by Candida utilis
| Autor: | Grbavčić Sanja Ž., Dimitrijević-Branković Suzana I., Bezbradica Dejan I., Šiler-Marinković Slavica S., Knežević Zorica D. |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 72, Iss 8-9, Pp 757-765 (2007) |
| Druh dokumentu: | article |
| ISSN: | 0352-5139 1820-7421 |
| DOI: | 10.2298/JSC0709757G |
| Popis: | A wild yeast strain isolated from spoiled soybean oil and identified as Candida utilis initially presented rather low lipase activity (approximately 4 IU dm-3) in submerged culture in a universal yeast medium containing 2 % malt extract. Studies were undertaken to improve the lipase production. The best yields of lipase were obtained with a medium supplemented with caprylic and oleic acids as inducers, but higher concentrations of the former (> 0.5 %) had a negative effect on the lipase production and cell growth. The type of nitrogen source seemed also to be very important. The highest lipolytic activity of 284 IU dm-3 was achieved after 5 days of fermentation in a medium containing oleic acid and hydrolyzed casein as carbon and nitrogen sources, respectively, and supplemented with Tween 80®. It was shown that optimization of the fermentation conditions can lead to a significant improvement in the lipase production (more than 70-fold higher compared to the initial value obtained in the non-optimized medium). . |
| Databáze: | Directory of Open Access Journals |
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