Abstract Background The present study describes the production of biosurfactant (BS) and emulsifier (BE) by the filamentous fungus Mucor hiemalis UCP 0039, as well as the characterization and stability of the both biomolecules for environmental or industrial applications. Results Biosurfactants and bioemulsifiers are amphiphilic compounds and are produced as extracellular molecules. The results showed that bioproduct obtained by shaker condition reduced the water surface tension of 72 to 32 mN/m and reached an emulsification index of 96%, while the static cultivation resulted in a biomolecule with a surface tension of 40 mN/m and an emulsification index of 96%, suggesting the production of a biosurfactant and bioemulsifier, respectively. The compounds showed glycolipid nature but the biosurfactant presented cationic charge, while the bioemulsifier, anionic charge. Thus, the results confirmed that M. hiemalis produced two distinct biomolecules under different parameters and in the same culture medium. Conclusions It is the first time that biosurfactant and emulsifier production has been described in the same medium and under different physical conditions by Mucor hiemalis. Both biomolecules showed thermal stability, as well as have significant effect on the viscosity of hydrophobic compounds, indicating the excellent potential for environmental safety or industrial applications to improve the efficiency of sustainable and economic technologies. How to cite Ferreira INS, Rodriguez DM, Campos-Takaki, GM, et al. Biosurfactant and bioemulsifier as promissing molecules produced by Mucor hiemalis isolated from Caatinga soil. Electron J Biotechnol 2020; 47. https://doi.org/10.1016/j.ejbt.2020.06.006 .

中文翻译：

---

生物表面活性剂和生物乳化剂作为从 Caatinga 土壤中分离的 Mucor hiemalis 产生的有希望的分子

摘要 背景本研究描述了丝状真菌 Mucor hiemalis UCP 0039 生产生物表面活性剂 (BS) 和乳化剂 (BE)，以及这两种生物分子在环境或工业应用中的表征和稳定性。结果生物表面活性剂和生物乳化剂是两亲性化合物，作为细胞外分子产生。结果表明，摇床条件下获得的生物制品使水表面张力降低72～32 mN/m，乳化指数达到96%，而静态培养得到的生物分子表面张力为40 mN/m，乳化率达到96%。指数为 96%，表明分别产生了生物表面活性剂和生物乳化剂。化合物表现出糖脂性质，但生物表面活性剂表现出阳离子电荷，而生物乳化剂，阴离子电荷。因此，结果证实了M. hiemalis 在不同参数和相同培养基中产生了两种不同的生物分子。结论 Mucor hiemalis 首次描述了在相同培养基和不同物理条件下的生物表面活性剂和乳化剂生产。这两种生物分子都表现出热稳定性，并对疏水化合物的粘度有显着影响，表明在环境安全或工业应用方面具有提高可持续和经济技术效率的巨大潜力。如何引用 Ferreira INS、Rodriguez DM、Campos-Takaki、GM 等。生物表面活性剂和生物乳化剂作为从 Caatinga 土壤中分离的 Mucor hiemalis 产生的有希望的分子。电子 J 生物技术 2020；47. https://doi.org/10.1016/j.ejbt.2020.06。