Guerrero-Higareda Santiago, Carrillo-Nieves Danay
Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Av. General Ramón Corona No. 2514, 45201, Zapopan, Jalisco, Mexico.
Heliyon. 2025 Jan 8;11(2):e41810. doi: 10.1016/j.heliyon.2025.e41810. eCollection 2025 Jan 30.
The objective of this study was to evaluate Caribbean Mexican seaweed as a raw material for the production of fucoidans, alginates, and bioactive extracts with antioxidant activity, total flavonoid content, total phenolic content, and UV absorbance. Extractions were first performed using varying ethanol concentrations and maceration times, with the optimal treatment selected based on its superior antioxidant activity, flavonoid and phenolic contents, and UV absorbance. The solid fraction from this treatment was then subjected to extraction using green solvents, specifically natural deep eutectic solvents (NADESs) and ultrasound-assisted extraction (UAE), to isolate alginate and fucoidan. The green extraction cascade enables the recovery of multiple value-added products from each fraction, showcasing both versatility and sustainability. The new DES combination yielded a high amount of crude fucoidan (0.4103 ± 0.0042 g g⁻ dry algae), exceeding the yields reported in previous studies. FTIR-ATR analysis confirmed that the extracted fucoidan structure was consistent with that of spp., although further purification and characterization are needed to determine whether its known bioactive properties are preserved. All treatments exhibited strong UV-B absorbance, highlighting the potential of extracts as sunscreen filters, with polyphenolic compounds being the primary contributor to UV absorption. Additionally, UV-A absorbance was correlated with flavonoid and carotenoid content, particularly in 50 % ethanol extracts. Future research should explore the potential of for sunscreen applications and polysaccharide extraction, offering a sustainable solution to the environmental and economic challenges posed by annual blooms in Mexico.
本研究的目的是评估加勒比墨西哥海藻作为生产岩藻依聚糖、藻酸盐以及具有抗氧化活性、总黄酮含量、总酚含量和紫外线吸光度的生物活性提取物的原料。首先使用不同乙醇浓度和浸渍时间进行提取，根据其优异的抗氧化活性、黄酮和酚类含量以及紫外线吸光度选择最佳处理。然后对该处理的固体部分使用绿色溶剂进行提取，具体为天然低共熔溶剂（NADESs）和超声辅助提取（UAE），以分离藻酸盐和岩藻依聚糖。绿色提取级联能够从每个部分回收多种增值产品，展示了其多功能性和可持续性。新的DES组合产生了大量的粗岩藻依聚糖（0.4103±0.0042 g g⁻干藻），超过了先前研究报道的产量。傅里叶变换红外光谱-衰减全反射（FTIR-ATR）分析证实，提取的岩藻依聚糖结构与 spp. 的结构一致，尽管需要进一步纯化和表征以确定其已知的生物活性特性是否得以保留。所有处理均表现出强烈的UV-B吸光度，突出了 提取物作为防晒滤光剂的潜力，其中多酚类化合物是紫外线吸收的主要贡献者。此外，UV-A吸光度与黄酮和类胡萝卜素含量相关，特别是在50%乙醇提取物中。未来的研究应探索 在防晒应用和多糖提取方面的潜力，为墨西哥每年 藻华带来的环境和经济挑战提供可持续的解决方案。
