【摘要】 利用不同的微波真空和热风组合方式对扇贝柱进行干燥试验研究,并与单纯微波真空干燥及单纯热风干燥进行比较,研究结果表明,利用微波真空+热风+微波真空的组合干燥方式进行扇贝柱的干燥,所需干燥时间比单纯热风干燥缩短50%以上,干燥扇贝柱的收缩率和复水率比单纯微波真空干燥均有不同程度的改善,抗破碎能力明显优于热风干燥。在微波功率和真空度分别为3W/g和0.090MPa、热风干燥温度为70℃的条件下,利用MV5(min)+AD120(min)+MV和MV5(min)+AD180(min)+MV两种组合干燥方法,所得干燥扇贝柱的10min复水率和20min复水率分别达到42.19%、89.85%和83.2%、106.5%,收缩率减小到49.43%和53.71%,干燥扇贝柱具有良好的感官品质(色泽嫩黄、表面无缝隙、形状保持完好等)和适中疏密程度的组织结构,是较优的扇贝柱干燥参数组合。更多还原

【Abstract】 <Abstrcat> The extraction conditions of antioxidative substances from black rice pericarp were studied by (orthorhombic) analysis and total antioxidant capacity (TAC) was used as the activity monitoring parameter. The optimized extraction conditions were as follows: using 60% ethanol as the solvent to extract antioxidative (substances) from black rice pericarp at 60℃ for 4 h, and with a material/solvent ratio of 1∶4. The one-time (extraction) rate under such conditions was 71.38%, and the twice extraction rate was over 85%. In order to (remove) the fat, the solvent of petroleum ether or normal hexane, which did not have significant effects on TAC of the extract, could be used as the degreaser. By comparing static and dynamic absorption performance, macropore adsorptive resin NKA-Ⅱ that had the highest performance in absorbing antioxidative extract from black rice (pericarp) and optimum absorption relieving agent 70% ethanol solution were selected. After absorption and (separation) by NKA-Ⅱ, the TAC and total anthocyanin content of antioxidative extract from black rice were (increased) by (4.00) and 4.01 times, respectively.更多还原