Department of Dietetics and Food Studies, Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, Armii Krajowej 13/15, 42-200 Czestochowa, Poland.
Institute of Food Technology and Analysis, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 2/22, 90-537 Lodz, Poland.
Int J Mol Sci. 2024 Oct 18;25(20):11202. doi: 10.3390/ijms252011202.
The dextrinization of potato starch was performed using a sophisticated single-mode microwave reactor with temperature and pressure control using 10 cycles of heating with stirring between cycles. Microwave power from 150 to 250 W, a cycle time from 15 to 25 s, and two types of vessels with different internal diameters (12 and 24 mm) and therefore different thicknesses of the heated starch layer were used in order to estimate the impact of vessel size used for microwave dextrinization. The characteristics of resistant dextrins (RD) including solubility in water, total dietary fiber (TDF) content, color parameters, the share of various glycosidic bonds, and pasting and rheological properties were carried out. The applied conditions allowed us to obtain RDs with water solubility up to 74% at 20 °C, as well as TDF content up to 47%, with a predominance of low-molecular-weight soluble fiber fraction, with increased content of non-starch glycosidic bonds, negligible viscosity, and a slightly beige color. The geometry of the reaction vessel influenced the properties of dextrins obtained under the same heating power, time, and repetition amounts. Among the conditions used, the most favorable conditions were heating 10 times for 20 s at 200 W in a 10 mL vessel and the least favorable were 15 s cycles.
采用先进的单模微波反应器，通过 10 个加热循环和循环间搅拌，实现马铃薯淀粉的糊化。使用 150 至 250 W 的微波功率、15 至 25 s 的循环时间以及两种不同内径（12 和 24 毫米）的容器，以评估用于微波糊化的容器尺寸对其的影响。研究了抗性糊精（RD）的特性，包括在水中的溶解度、总膳食纤维（TDF）含量、颜色参数、各种糖苷键的比例以及糊化和流变性能。应用的条件允许我们获得在 20°C 下溶解度高达 74%的 RD，以及高达 47%的 TDF 含量，其中以低分子量可溶性纤维为主，非淀粉糖苷键含量增加，粘度可忽略不计，颜色略带米色。反应容器的几何形状会影响在相同加热功率、时间和重复次数下获得的糊精的性质。在所使用的条件中，最有利的条件是在 10 mL 容器中以 200 W 加热 10 次 20 s，最不利的条件是 15 s 循环。
