BACKGROUND In the present study, the usability of saponin rich extracts (soapwort and horse chestnut) was evaluated as a foaming agent for foam mat drying of pomegranate juice. RESULTS According to the foaming and stabilization studies, the optimum conditions were determined as 0.4% of soapwort extract, 0.03% of carboxymethyl cellulose (CMC) as a stabilizer and 3 min of whipping time. The foam produced using these conditions were dried at the different spreading thickness and drying temperatures. The results showed that the thicker spreading thicknesses provided a higher antioxidant activity. On the other hand, drying temperature had a significant effect on all measured parameters except moisture content and water activity. The higher drying temperature caused the higher colour change and lower content of total phenolics, total monomeric anthocyanins, cyanidin-3-glucoside and delphinidin-3-glucoside. On the other hand, higher content of ascorbic acid and better antioxidant activity was determined in the samples dried at 70°C. CONCLUSION According to the obtained results, spreading thickness of 2 mm and drying temperature of 70°C were suggested for pomegranate juice powder production by foam mat drying. Overall, it was demonstrated that saponin rich extracts are a good foaming agent alternative that provides foaming at very low concentrations and a product with high quality. This article is protected by copyright. All rights reserved.

中文翻译：

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皂草和七叶树皂苷提取物作为发泡剂在石榴汁泡沫垫干燥中的应用

背景在本研究中，我们评估了富含皂角苷的提取物（皂草和七叶树）作为石榴汁泡沫垫干燥的发泡剂的可用性。结果 根据发泡和稳定研究，最佳条件确定为皂草提取物 0.4%、羧甲基纤维素 (CMC) 0.03% 作为稳定剂，搅打时间为 3 分钟。使用这些条件生产的泡沫在不同的铺展厚度和干燥温度下干燥。结果表明，较厚的铺展厚度提供了较高的抗氧化活性。另一方面，干燥温度对除水分含量和水分活度外的所有测量参数都有显着影响。干燥温度越高，颜色变化越大，总酚含量越低，总单体花青素、花青素-3-葡萄糖苷和飞燕草素-3-葡萄糖苷。另一方面，在 70°C 干燥的样品中测定了更高的抗坏血酸含量和更好的抗氧化活性。结论根据所得结果，建议采用泡沫垫干燥法生产石榴汁粉，铺展厚度为2 mm，干燥温度为70°C。总体而言，已证明富含皂苷的提取物是一种良好的发泡剂替代品，可在非常低的浓度下提供发泡和高质量的产品。本文受版权保护。版权所有。泡沫垫干燥法生产石榴汁粉时，建议铺展厚度为 2 mm，干燥温度为 70°C。总体而言，已证明富含皂苷的提取物是一种良好的发泡剂替代品，可在非常低的浓度下提供发泡和高质量的产品。本文受版权保护。版权所有。泡沫垫干燥法生产石榴汁粉时，建议铺展厚度为 2 mm，干燥温度为 70°C。总体而言，已证明富含皂苷的提取物是一种良好的发泡剂替代品，可在非常低的浓度下提供发泡和高质量的产品。本文受版权保护。版权所有。