Benincasa Maria, Accorsini Fábio Raphael
Departamento de Biologia Aplicada à Agropecuária, Universidade Estadual Paulista - UNESP/Campus de Jaboticabal, Via de Acesso Prof Paulo, Donato Castellane s/n, 14884-900 Jaboticabal/SP, Brazil.
Bioresour Technol. 2008 Jun;99(9):3843-9. doi: 10.1016/j.biortech.2007.06.048. Epub 2007 Aug 14.
Pseudomonas aeruginosa LBI produced surface active rhamnolipids when cultivated on waste from the sunflower-oil process under different conditions. These biosurfactants, which reduce the superficial and interfacial tensions between fluids, offer advantages over their chemical counterparts, especially because of their ecological acceptability. These molecules can be used in fields as diverse as chemical, pharmaceutical and petrochemical industries. In this work, we present the effect of C/N ratio on growth and production yield. The best production yields (Y P/S) were achieved for C/N ratios (in g/g) of 8/1 (0.22) and 6.4/1 (0.23). The product concentration was very satisfactory (7.3g/L) at C/N ratio of 8/1, especially when considering that the substrate was basically composed of wastes that would otherwise constitute an environmental disposal problem.
铜绿假单胞菌LBI在不同条件下以向日葵油加工过程中的废料为培养基进行培养时，会产生具有表面活性的鼠李糖脂。这些生物表面活性剂能够降低流体之间的表面张力和界面张力，相较于化学合成的表面活性剂具有诸多优势，特别是其生态可接受性。这些分子可应用于化学、制药和石油化工等多个行业。在本研究中，我们展示了碳氮比对生长和产量的影响。碳氮比（g/g）为8/1（0.22）和6.4/1（0.23）时，产量（Y P/S）最高。当碳氮比为8/1时，产物浓度非常令人满意（7.3g/L），尤其考虑到底物基本由废料组成，否则这些废料会构成环境处理问题。
