1 23 Journal of Surfactants and Detergents ISSN 1097-3958 J Surfact Deterg DOI 10.1007/s11743-013-1520-y Achieving the Best Yield in Glycolipid Biosurfactant Preparation by Selecting the Proper Carbon/Nitrogen Ratio Rashmi Rekha Saikia, Hemen Deka, Debahuti Goswami, Jiumoni Lahkar, Siddhartha Narayan Borah, Kaustuvmani Patowary, Plabita Baruah, et al.