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Roles of fucoidan, an anionic sulfated polysaccharide on BSA-stabilized oil-in-water emulsion
Macromolecular Research ( IF 2.4 ) Pub Date : 2009 , DOI: 10.1007/bf03218666
Do-Yeong Kim , Weon-Sun Shin

Fucoidan, a sulfated polysaccharide derived from brown seaweed, is an important material valued for its various biological functions, including anti-coagulation, anti-aging, and immune system support. In this study, we examined the potential of fucoidan as a novel emulsifying agent in BSA (bovine serum albumin)-stabilized emulsion at a neutral pH. We measured the dispersed oil-droplet size, surface zeta-potential and creaming formation of 0.5 wt% BSA emulsion (20 wt% oil fraction) in the absence and presence of fucoidan. The average particle size and zeta-potential value were 625.4 nm and -30.91 mV in only BSA-stabilized emulsion and 745.2 nm and -44.2 mV in 1.0 wt% fucoidan-added BSA emulsion, respectively. This result suggested that some positive charges of the BSA molecules interacted with the negative charges of fucoidan to inhibit the flocculation among the oil droplets. The creaming rate calculated from the backscattering data measured by Turbiscan dramatically decreased in 1.0 wt% fucoidan-added BSA emulsion during storage. Accordingly, the repulsion forces induced among the oil particles coated with 1.0 wt% fucoidan in emulsion solution resulted in significantly increased emulsion stability. The turbidity of the BSA-stabilized emulsion at 500 nm decreased during five days of storage. However, the fucoidan-added BSA emulsion exhibited a higher value of turbidity than the BSA-stabilized emulsion did. In conclusion, an anionic sulfated fucoidan lowered the surface zeta-potential of BSA-coated oil droplets via the electrostatic interaction, and subsequently inhibited the flocculation among the oil droplets, thereby clearly minimizing the creaming and phase separation of the emulsion.

中文翻译:

岩藻依聚糖,一种阴离子硫酸多糖在BSA稳定的水包油乳液中的作用

褐藻糖胶是一种从褐藻中提取的硫酸化多糖,是一种重要的材料,具有多种生物学功能,包括抗凝,抗衰老和免疫系统支持。在这项研究中,我们检查了岩藻依聚糖作为中性pH稳定BSA(牛血清白蛋白)稳定乳液中新型乳化剂的潜力。我们在不存在岩藻依聚糖的情况下,测量了0.5 wt%BSA乳液(20 wt%油馏分)的分散油滴尺寸,表面ζ电位和乳化形成。在仅BSA稳定的乳液中,平均粒径和ζ电位值分别为625.4nm和-30.91mV,在添加1.0重量%岩藻依聚糖的BSA乳液中,其平均粒径分别为745.2nm和-44.2mV。该结果表明,BSA分子的一些正电荷与岩藻依聚糖的负电荷相互作用以抑制油滴之间的絮凝。在储存期间,由Turbiscan测量的反向散射数据计算出的乳化率在添加1.0 wt%岩藻依聚糖的BSA乳液中急剧下降。因此,在乳液溶液中用1.0重量%岩藻依聚糖包被的油颗粒之间产生的排斥力导致乳液稳定性显着提高。储存五天后,BSA稳定的乳液在500 nm处的浊度降低。但是,添加岩藻依聚糖的BSA乳剂比BSA稳定的乳剂具有更高的浊度值。总之,阴离子硫酸盐岩藻依聚糖通过静电相互作用降低了BSA涂层油滴的表面ζ电位,
更新日期:2020-09-14
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