Department of Food Biotechnology, Research Institute of Food Science and Technology (RIFST),Km 12 Mashhad-Quchan Highway, P.O. Box: 91895/157/356, Mashhad, Iran.
Department of Food Nanotechnology, Research Institute of Food Science and Technology (RIFST),Km 12 Mashhad-Quchan Highway, P.O. Box: 91895/157/356, Mashhad, Iran.
Carbohydr Polym. 2018 Mar 1;183:183-191. doi: 10.1016/j.carbpol.2017.12.001. Epub 2017 Dec 5.
Acacia gum solution was employed as a carrier for electrospray-assisted drying of probiotic cells. To optimize the process, effect of gum concentration, thermal sterilization as a prerequisite for microbial studies, and surfactant addition on physical properties of feed solution was investigated. Increasing gum concentration from 20 to 40 wt.% led to a viscosity increase, whilst surface tension did not change meaningfully and electrical conductivity declined after an increasing trend up to 30 wt.% of the gum. Thermal sterilization increased the viscosity without any significant effect on the conductivity and surface tension. Surfactant addition reduced the surface tension and conductivity but the viscosity increased. Highly uniform particles were formed by electrospray-assisted drying of autoclaved 35 wt.% acacia gum solution containing 1 wt.% Tween 80. Thermal sterilization and surfactant addition improved electrospray-ability of acacia gum solution. Bacterial count showed that more than 96 percent of probiotic cells passed the process viably.
阿拉伯树胶溶液被用作电喷雾辅助干燥益生菌细胞的载体。为了优化该工艺，研究了胶浓度、热灭菌（微生物研究的前提）和表面活性剂添加对进料溶液物理性质的影响。胶浓度从 20wt.%增加到 40wt.%会导致粘度增加，而表面张力没有显著变化，电导率在增加到 30wt.%的胶后呈下降趋势。热灭菌会增加粘度，而对电导率和表面张力没有显著影响。表面活性剂的添加会降低表面张力和电导率，但会增加粘度。通过对含有 1wt.%吐温 80 的 35wt.%阿拉伯树胶溶液进行高压灭菌和电喷雾辅助干燥，形成了高度均匀的颗粒。热灭菌和表面活性剂添加改善了阿拉伯树胶溶液的电喷雾性能。细菌计数表明，超过 96%的益生菌细胞在该过程中存活下来。
