中文摘要：

对不同加热条件下处理豆浆的异黄酮成分、总酚含量以及DPPH自由基清除率的变化进行了研究。结果表明：在所设置的处理条件下，当加热时间相同时，随着加热温度的升高，异黄酮总量随之增大；在相同的加热温度下随着加热时间的延长，异黄酮总量亦呈现增大的趋势，同时，异黄酮糖苷含量、异黄酮苷元含量、3种异黄酮系列的含量（大豆苷系列、黄豆黄素系列以及染料木素系列）以及DPPH自由基清除率均呈现相似的变化趋势。总酚含量和异黄酮含量之间存在一定的正相关性。

英文摘要：

This research investigated the effects of heat treatment on isoflavones composition, total phenolic content, and DPPH free radical scavenging activity of soymilk. The results showed that the experiment set under the condition of recognition pro- cessing, while holding the time of heating,the total content of isofiavones increase with the increasing heating temperature. Fur- thermore, when holding the temperature,the total content of isoflavones showed a significant trend of increase when the time of heating was longer. Additionally, the total glncosides, aglycones, the three isoflavone series（ daidzein series, glycitein series and genistein series）and DPPH free radical scavenging activity showed the similar trends. There was a positive COlTelation between the total r~henolic content and the total content of isoflavones.