This work deals with the use of microwave hydrodiffusion and gravity (MHG) for the recovery of hybrid carrageenans with specific mechanical features together with bioactive compounds. For this purpose, Mastocarpus stellatus red seaweed was used as raw material and the most adequate MHG processing conditions were studied. The physicochemical properties of the algae and the corresponding biopolymers, the fundamental characterisation of the bioactive compounds from the extracts (antioxidant capacity, sulfate content, protein content, among others) and the rheological features of the formulated gels were analysed. Results indicated that MHG is an adequate technique for obtaining functional extracts with potential applications in the food and non-food fields. Hybrid carrageenans with a wide range of viscoelastic features were recovered by MHG, saving time compared to conventional methods. The yields obtained for the recovered hybrid carrageenans and bioactive fractions were comparable to those obtained in red algae with conventional techniques.

这项工作涉及使用微波加氢扩散和重力（MHG）回收具有特定机械特征的杂化角叉菜胶以及生物活性化合物。为此，Mastocarpus stellatus以红海藻为原料，研究了最合适的MHG加工条件。分析了藻类和相应生物聚合物的理化性质，提取物中生物活性化合物的基本特征（抗氧化能力，硫酸盐含量，蛋白质含量等）以及配制凝胶的流变特性。结果表明，MHG是一种获得功能性提取物的适当技术，在食品和非食品领域具有潜在应用。MHG回收了具有广泛粘弹性特征的混合角叉菜胶，与传统方法相比节省了时间。回收的杂合角叉菜胶和生物活性成分的收率与常规技术在红藻中的收率相当。