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High Levan Production by Bacillus licheniformis NS032 Using Ammonium Chloride as the Sole Nitrogen Source
dc.creator | Kekez, Branka | |
dc.creator | Gojgić-Cvijović, Gordana | |
dc.creator | Jakovljević, Dragica | |
dc.creator | Kojic, J R Stefanovic | |
dc.creator | Marković, Marijana | |
dc.creator | Beškoski, Vladimir | |
dc.creator | Vrvić, Miroslav | |
dc.date.accessioned | 2019-01-30T17:46:19Z | |
dc.date.available | 2019-01-30T17:46:19Z | |
dc.date.issued | 2015 | |
dc.identifier.issn | 0273-2289 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/1755 | |
dc.description.abstract | In this study, levan production by Bacillus licheniformis NS032 isolated from a petroleum sludge sample was investigated. High levan yield was obtained in a wide range of sucrose concentrations (up to 400 g/L) and, contrary to most levan-producing strains, using ammonium chloride as the sole N source. Interaction between sucrose, ammonium chloride, and initial pH of the medium in a low sucrose (60-200 g/L) and a high sucrose (300-400 g/L) system was analyzed by response surface methodology. According to the calculated model in the low sucrose system, maximum predicted levan yield was 47.8 g/L (sucrose 196.8 g/L, ammonium chloride 2.4 g/L, pH 7.0), while in the high sucrose system, levan yield was 99.2 g/L (sucrose 397.6 g/L, ammonium chloride 4.6 g/L, pH 7.4). In addition, protective effect of microbial levan against copper toxicity to Daphnia magna is observed for the first time. The acute toxicity (48 h EC50) of copper decreased from 0.14 to 0.44 mg/L by levan in concentration of 50 ppm. | en |
dc.publisher | Humana Press Inc, Totowa | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/43004/RS// | |
dc.rights | restrictedAccess | |
dc.source | Applied Biochemistry and Biotechnology | |
dc.subject | Levan | en |
dc.subject | Box-Behnken design | en |
dc.subject | pH | en |
dc.subject | Bacillus licheniformis | en |
dc.subject | Response surface methodology | en |
dc.subject | Copper | en |
dc.subject | Daphnia magna | en |
dc.title | High Levan Production by Bacillus licheniformis NS032 Using Ammonium Chloride as the Sole Nitrogen Source | en |
dc.type | article | |
dc.rights.license | ARR | |
dcterms.abstract | Гојгић Цвијовић, Гордана; Јаковљевић, Драгица; Кекез, Бранка; Врвиц, М М; Бескоски, Владимир; Којиц, Ј Р Стефановиц; Марковић, Маријана; | |
dc.citation.volume | 175 | |
dc.citation.issue | 6 | |
dc.citation.spage | 3068 | |
dc.citation.epage | 3083 | |
dc.citation.other | 175(6): 3068-3083 | |
dc.citation.rank | M23 | |
dc.identifier.pmid | 25592434 | |
dc.identifier.doi | 10.1007/s12010-015-1475-8 | |
dc.identifier.scopus | 2-s2.0-84924053585 | |
dc.identifier.wos | 000350881100024 | |
dc.type.version | publishedVersion |