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Abstract：
Selective removal of phenolic compounds (PCs) from de-oiled sunflower kernel is generally considered a key step for food applications, but this often leads to protein loss. PC removal yield and protein loss were assessed during an aqueous or aqueous ethanol washing process with different temperatures, pH-values and ethanol contents. PC yield and protein loss increased when the ethanol content was < 60% or when a higher temperature was applied. Our main finding is that preventing protein loss should be the key objective when selecting process conditions. This can be achieved using solvents with high ethanol content. Simulation of the multi-step exhaustive process showed that process optimization is possible with additional washing steps. PC yield of 95% can be achieved with only 1% protein loss using 9 steps and 80% ethanol content at 25℃. The functional properties of the resulting concentrates were hardly altered with the use of high ethanol solvents.
摘要：
从脱油向日葵仁中选择性去除酚类化合物（PC）通常被认为是食品应用的关键步骤，但这通常会导致蛋白质损失。在不同温度下，在水性或水性乙醇洗涤过程中评估PC去除产量和蛋白质损失。pH值和乙醇含量。当乙醇含量<60%时或当施加较高温度时,PC产量和蛋白质损失增加。我们的主要发现是，在选择工艺条件时，防止蛋白质损失应该是关键目标。这可以使用具有高乙醇含量的溶剂来实现。多步骤穷举过程的模拟表明，可以通过额外的洗涤步骤进行过程优化。在25°C下,使用9个步骤和80%的乙醇含量,在仅1%的蛋白质损失的情况下,可以实现95%的PC产率。使用高乙醇溶剂几乎不会改变所得浓缩物的功能特性。
