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dc.creatorWang,Nengfei
dc.creatorZang,Jiaye
dc.creatorMing,Kaili
dc.creatorLiu,Yu
dc.creatorWu,Zuohao
dc.creatorDing,Hui
dc.date2013-07-01
dc.date.accessioned2019-05-03T12:45:06Z
dc.date.available2019-05-03T12:45:06Z
dc.identifierhttps://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400010
dc.identifier.urihttp://revistaschilenas.uchile.cl/handle/2250/85357
dc.descriptionBackground: Cellulose can be converted to ethanol by simultaneous saccharification and fermentation (SSF). The difference between the optimal temperature of cellulase and microbial fermentation, however, has been identified as the critical problem with SSF. In this study, one fungal strain (AnsX1) with high cellulase activity at low temperature was isolated from Antarctic soils and identified as Verticillium sp. by morphological and molecular analyses. Results: The biochemical properties of crude AnsX1 cellulase samples were studied by filter paper cellulase assay. The maximum cellulase activity was achieved at low temperature in an acidic environment with addition of metal ions. Furthermore, AnsX1 cellulase demonstrated 54-63% enzymatic activity at ethanol concentrations of 5-10%. AnsX1 cellulase production was influenced by inoculum size, carbon and nitrogen sources, and elicitors. The optimal culture conditions for AnsX1 cellulase production were 5% inoculum, wheat bran as carbon source, (NH4)2SO4 as nitrogen source, and sorbitol added in the medium. Conclusions: Our present work has potential to enable the development of an economic and efficient cold-adapted cellulase system for bioconversion of lignocellulosic biomass into biofuels in future.
dc.formattext/html
dc.languageen
dc.publisherPontificia Universidad Católica de Valparaíso
dc.relation10.2225/vol16-issue4-fulltext-12
dc.rightsinfo:eu-repo/semantics/openAccess
dc.sourceElectronic Journal of Biotechnology v.16 n.4 2013
dc.subjectAntarctic soil
dc.subjectcellulose
dc.subjectfilter paper cellulase assay
dc.subjectpsychrotrophic fungi
dc.subjectVerticillium sp
dc.titleProduction of cold-adapted cellulase by Verticillium sp. isolated from Antarctic soils


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