The influence of bath and probe sonication on the physicochemical and microstructural properties of wheat starch
The influence of bath and probe sonication on the physicochemical and microstructural properties of wheat starch
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DOI：
10.1002/fsn3.1111
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发表时间：
2019-07-01
影响因子：
3.9
通讯作者：
Jafari, Seid Mahdi
中科院分区：
文献类型：
--
作者：
Jamalabadi, Maryam;Saremnezhad, Solmaz;Jafari, Seid Mahdi
超声波已迅速成功地应用于各种食品技术方面，包括改善食品成分（如淀粉）的功能特性。本工作进行了比较两种类型的超声波处理，浴和探针，对小麦淀粉的几个物理化学和微观结构特性的影响。两个超声波探头（200和400 W）和超声波浴（690 W）被施加到处理小麦淀粉悬浮液在15和30 min。超声波时间在400 W探头是间歇的，而对于其他治疗，它是连续的。膨胀能力（SC），溶解度（SB），浊度（TB），和吸油量（OA）参数进行了研究的天然（对照）和超声处理的小麦淀粉。此外，扫描电子显微镜（SEM），以确定超声处理对小麦淀粉颗粒的形态的影响。用200 W超声探头处理的淀粉样品获得了最高水平的SB和OA以及最低的SC，而在两个超声时间（15和30 min）之间没有观察到显著差异（p < 0.05）。扫描电镜图像显示，超声波对淀粉颗粒的结构有明显的影响，且影响不均匀，有些颗粒表面光滑，有些颗粒表面不规则，有些颗粒甚至出现结构塌陷。在探头200 W处理中获得最高的颗粒崩解。
Ultrasound has been rapidly applied successfully in diverse food technological aspects including improvement of functional properties of food ingredients such as starch. This work was carried out to compare the influence of two types of sonication, bath and probe, on several physicochemical and microstructural properties of wheat starch. Two sonication probes (200 and 400 W) and a sonication bath (690 W) were applied to treat wheat starch suspensions at 15 and 30 min. Sonication time in 400 W probe was intermittent while for the other treatments, it was continuous. Swelling capacity (SC), solubility (SB), turbidity (TB), and oil absorption (OA) parameters were investigated for native (control) and sonicated wheat starch. Moreover, scanning electron microscopy (SEM) was performed to determine the influence of sonication treatments on the morphology of wheat starch granules. The highest level of SB and OA, as well as the lowest SC, was obtained for starch samples treated with 200 W sonication probe, while no significant difference (p < 0.05) was observed between two sonication times (15 and 30 min). The SEM images showed significant and nonuniform impact of ultrasound on the structure of starch granules in which some granules remained almost smooth, but some showed high irregular surfaces or even in some cases structure collapse. The highest disintegration of granules was obtained in probe 200 W treatments.