【摘要】 研究了不同时期的苹果渣内果胶含量、果胶提取率及其它的指标的变化。比较了人工干燥和自然干燥两种方式对果胶的影响,并测定了果胶在保存了一段时间后胶凝度的变化情况。结果表明,苹果渣果胶含量从8月到11月保持高水平,以后下降,9月份达到最大值。果胶提取率与果胶含量变化相一致,以9月份为最高。且人工干燥比自然干燥条件果胶提取率高。果胶在存放一段时间后胶凝度会有不同程度的下降。更多还原

【Abstract】 Galacturonic acid content,pectin yield and other indexes of apple pomace(AP) at different stages were studied.The influence of oven drying and air drying was compared,and the gels variation of pectin which was conserved for different periods was measured.The result showed that the galacturonic acid content of AP kept a high level from August to November,then decreased continuously,reached the highest level in September.The pectin yield of AP was consistent with the galacturonic acid content,and it was higher under oven drying than air drying.The gels of pectin which was conserved for a period decreased to some extent.更多还原