Subcritical Water Extraction of Allelochemical Compounds from Mucuna Beans

Djéssica T. Raspe, Oscar O. Santos Jr., Camila da Silva* and Lúcio Cardozo-Filho, 
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Abstract

This work aims to obtain allelochemical compounds from mucuna beans by applying subcritical water extraction (SWE). The influence of the water flow rate (solvent to beans ratio), temperature, and static time applied during extraction was evaluated in the removal of compounds of interest, with pressure fixed at 10 MPa. The application of water flow of 1 mL min–1 (22.5 mL g–1) provided greater removal of L-Dopa and total phenolic compounds (TPC). The temperature (120 °C) increased the extraction of L-Dopa, TPC, and total flavonoids (TF), providing greater antioxidant activity (AA). Furthermore, 20 min of static time preceding dynamic extraction promoted a percentage increase of ∼41.2% and ∼61.5% in the extraction of L-Dopa and TPC, respectively. In the profiled compounds, phenolic acids, flavonoids, and anthocyanins were the phytochemicals identified. The extract obtained under ideal conditions allowed a mass yield of ∼58.1 wt %, with active potential evaluated by levels of L-Dopa, TPC, and TF, as well as AA, validating the high antioxidant activity and suggesting allelopathic potential of the extract.

This study explores the obtaining of phytochemical compounds such as phenolic, flavonoids, and L-Dopa, which promote antioxidant activity with bioherbicidal potential from mucuna beans, through an extractive process using water under subcritical conditions.

亚临界水萃取毛豆中的 Allelochemical 化合物
这项研究旨在通过亚临界水萃取(SWE)从粘豆中获取等位化学化合物。在压力固定为 10 兆帕的条件下,评估了萃取过程中水流速度(溶剂与豆类的比率)、温度和静置时间对去除相关化合物的影响。水流量为 1 mL min-1 (22.5 mL g-1)时,左旋多巴和总酚类化合物(TPC)的去除率更高。温度(120 °C)提高了左旋多巴、总酚化合物和总黄酮(TF)的萃取率,从而提高了抗氧化活性(AA)。此外,在动态萃取前静置 20 分钟可使左旋多巴和 TPC 的萃取率分别提高 41.2% 和 61.5%。在分析的化合物中,酚酸、类黄酮和花青素是已鉴定的植物化学物质。本研究探讨了在亚临界条件下用水萃取法从粘豆中提取酚类、黄酮类和左旋多巴等植物化学物质的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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