title: Stabilization of kerosene/water emulsions using bioemulsifiers obtained by fermentation of hemicellulosic sugars with Lactobacillus pentosus.
abstract: The results of the present study show that Lactobacillus pentosus can produce extracellular bioemulsifiers by utilizing hemicellulosic sugars from grape marc as a source of carbon. The effectiveness of these bioemulsifiers (LPEM) was studied by preparing kerosene/water (K/W) emulsions in the presence and absence of these emulsifiers. Various parameters such as relative emulsion volume (EV), stabilizing capacity (ES), viscosity, and droplet size of K/W emulsions were measured. The EV values for K/W emulsions stabilized by concentrated LPEM were approximately 74.5% after 72 h of emulsion formation, with ES values of 97%. These values were higher than those obtained with dodecyl sodium sulfate as emulsifier (EV=62.3% and ES=87.7%). Additionally, K/W emulsions stabilized by LPEM produced polydisperse emulsions containing droplets of radius between 10 and 40 μm, which were smaller than those obtained for K/W emulsions without LPEM (droplet radius=60-100 μm). Moreover, the viscosity values of the K/W emulsions without and with LPEM were approximately 236 and 495 cP, respectively.
authors.affiliation: Departamento de Ingeniería Agroindustrial, Universidad Politécnica de Guanajuato, CP 38483 Mexico.
authors.forename: Oscar Manuel
authors.initials: OM
authors.lastname: Portilla-Rivera
authors.forename: Ana María
authors.initials: AM
authors.lastname: Torrado
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Domínguez
authors.forename: Ana Belén
authors.initials: AB
authors.lastname: Moldes
mesh_terms: D055598:Chemical Phenomena; D045703:Emulsifying Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D004655:Emulsions; D005285:Fermentation; D005525:Food-Processing Industry / Q000191:economics; D005638:Fruit / Q000737:chemistry; D007220:Industrial Waste / Q000032:analysis / Q000191:economics; D007648:Kerosene; D007778:Lactobacillus / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D027843:Vitis / Q000737:chemistry; D014867:Water
chemical_list: D045703:Emulsifying Agents; D004655:Emulsions; D007220:Industrial Waste; D007648:Kerosene; D011134:Polysaccharides; D014867:Water; C007916:hemicellulose