Department of Pharmaceutical Botany, Medical University of Lublin, 20-093 Lublin, Poland.
Department of Inorganic Chemistry, Medical University of Lublin, 20-093 Lublin, Poland.
Molecules. 2020 Oct 3;25(19):4538. doi: 10.3390/molecules25194538.
Goji fruit ( L.) has been identified as a polyphenolic compound plant source of noted richness. It also contains polysaccharides, carotenoids, vitamins and minerals, fatty and organic acids. The purpose of the presented research was to produce innovative instant corn gruels with various dry goji berry contents (1, 3 and 5%), to determine the level of included polyphenolic compounds (including individual free phenolic acids) and to assess the antioxidant properties of these functional-food products. A further objective was to identify the optimum value of one of the most important production parameter, the rotational speed of the extruder's screw during gruel processing. The undertaken chromatographic analysis (LC-ESI-MS/MS) showed a wide variety of available phenolic acids. In the samples with 5% addition of fruit, eight phenolic acids were detected, whereas in the corn gruel without additives, only five were noted. The antioxidant activity, the content of free phenolic acids and the sum of polyphenols increased with increase of the functional additive. For all goji content, screw speeds of 100 and 120 rpm rather than 80 rpm resulted in higher polyphenol amounts and greater Trolox equivalent antioxidant capacity, as well as higher ability to scavenge DPPH.
枸杞（L.）已被确定为具有显著丰富多酚化合物的植物来源。它还含有多糖、类胡萝卜素、维生素和矿物质、脂肪和有机酸。本研究的目的是生产具有不同干枸杞含量（1%、3%和 5%）的创新速溶玉米粥，以确定所包含的多酚化合物（包括个别游离酚酸）的水平，并评估这些功能性食品的抗氧化特性。另一个目标是确定最关键的生产参数之一——在玉米粥加工过程中螺杆的旋转速度的最佳值。进行的色谱分析（LC-ESI-MS/MS）显示了大量可用的酚酸。在添加 5%水果的样品中，检测到八种酚酸，而在没有添加剂的玉米粥中，仅检测到五种。抗氧化活性、游离酚酸含量和多酚总量随着功能添加剂的增加而增加。对于所有枸杞含量，螺杆速度为 100 和 120 rpm 比 80 rpm 产生更高的多酚含量和更高的 Trolox 当量抗氧化能力，以及更高的 DPPH 清除能力。
