Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, United States.
Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, United States.
Food Chem. 2021 Aug 1;352:129367. doi: 10.1016/j.foodchem.2021.129367. Epub 2021 Feb 23.
About 90% of grapefruit in Florida are affected by Huanglongbing (HLB). HLB negatively affects the organoleptic properties of grapefruit juice because affected trees overproduce bitter secondary-metabolites, mostly naringin. The objective of this research was to remove naringin from HLB-affected grapefruit juice using microporous-adsorbents and to investigate how debittering affected narirutin, limonoids, bergamottin, and consumer acceptability. The adsorption kinetics of naringin on seven adsorbent resins obeyed pseudo-second order. PAD550 and PAD600 showed better static adsorption/desorption. Adsorption-isotherms on these resins were better fitted on Temkin-Pyzhev-model. On a fixed-bed-column packed with PAD550 resin, a slower loading rate increased its breakthrough volume before naringin in effluent reached its taste-threshold. In addition to naringin being reduced to below its taste-threshold, debittering significantly decreased the content of limonin, nomilin, and bergamottin. A consumer taste panel rated debittered and half-debittered juices higher for overall acceptability than the untreated. The half-debittered juice was ranked the most preferred while untreated was the least preferred.
佛罗里达州约 90%的葡萄柚受到黄龙病（HLB）的影响。HLB 会对葡萄柚汁的感官特性产生负面影响，因为受影响的树木会过度产生苦味的次生代谢物，主要是柚皮苷。本研究的目的是使用微孔吸附剂从 HLB 感染的葡萄柚汁中去除柚皮苷，并研究脱苦对柚皮芸香苷、柠檬苦素、毕澄茄素和消费者可接受性的影响。七种吸附树脂对柚皮苷的吸附动力学符合拟二级动力学。PAD550 和 PAD600 显示出更好的静态吸附/解吸性能。这些树脂上的吸附等温线更符合 Temkin-Pyzhev 模型。在填充 PAD550 树脂的固定床柱上，较低的加载速率增加了其穿透体积，直到流出物中的柚皮苷达到其味觉阈值。脱苦不仅将柚皮苷降低到其味觉阈值以下，还显著降低了柠碱、诺米林和毕澄茄素的含量。消费者品尝小组对脱苦和半脱苦的果汁的整体可接受性评价高于未处理的果汁。半脱苦的果汁被评为最受欢迎，而未处理的果汁则最不受欢迎。
