مقاله Evaluation of waste products in the synthesis of surfactants by yeasts : تی پی بین

خلاصه مقاله

The highest yields of biosurfactants were obtained by: (i) Pseudozyma antarctica (107.2 g L−1) cultivated in a medium containing post-refining waste; (ii) Pseudozyma aphidis (77.7 g L−1); and (iii)Starmerella bombicola (93.8 g L−1) both cultivated in a medium with soapstock; (iv)Pichia jadinii(67.3 g L−1) cultivated in a medium supplemented with waste frying oil. It was found that the biosurfactant synthesis yield increased in all strains when the cell surface hydrophobicity reached 70–80 %, enabling the microbial cells to make good contact with hydrophobic substrates. The lowest surface tension of the post-cultivation medium was from 32.0 mN m−1 to 37.8 mN m−1. However, this parameter (which was also determined by a drop collapse assay) was of limited use in monitoring biosurfactant synthesis in this study. The crude glycerol was not a good substrate for biosurfactant synthesis although, in the case of P. aphidis, 67.4 g L−1 of biosurfactants were obtained after cultivation in the medium supplemented with glycerol fraction (GF2). In a low-cost medium containing soapstock and whey permeate or molasses, about 90 g L−1 of mannosylerythritol lipids were synthesised by P. aphidis and approximately 40 g L−1 by P. antarctica.

نویسندگان

Ewelina Dzięgielewska [ Department of Food Biotechnology, University of Warmia and Mazury in Olsztyn, J. Heweliusz St. 1, 10-718, Olsztyn, Poland ]

Marek Adamczak [ Department of Food Biotechnology, University of Warmia and Mazury in Olsztyn, J. Heweliusz St. 1, 10-718, Olsztyn, Poland ]

کلمات کلیدی

biosurfactants waste lipids glycerol glycolipids surface tension

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Chemical Papers 2013

Chemical Papers is devoted to research in pure and applied chemistry and chemical engineering. At its founding in 1947, the journal presented the achievements of Slovak chemical science. Today, it is a peer-reviewed international journal published in English by the Institute of Chemistry of the Slovak Academy of Sciences, with the support of several other academic institutions. Its interdisciplinary coverage brings chemistry research together with related disciplines, including analytical chemistry; (bio)catalysis; biochemistry; chemical (bio)technology; (bio)chemical engineering; chemical physics; drug chemistry; food chemistry; environmental chemistry; inorganic chemistry; macromolecular chemistry; materials chemistry; mathematical chemistry; medical and pharmaceutical chemistry; nanochemistry; organic chemistry; physical chemistry and more.

حوزه های تحت پوشش : Chemistry/Food Science, general, Industrial Chemistry/Chemical Engineering, Biochemistry, generalBiotechnology