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Production and investigation of the physico-chemical properties of MEL-A from glycerol and coconut water
World Journal of Microbiology and Biotechnology ( IF 4.1 ) Pub Date : 2020-06-01 , DOI: 10.1007/s11274-020-02857-8
Chandraprasad Madihalli 1, 2 , Harshal Sudhakar 1 , Mukesh Doble 1
Affiliation  

This work reports the production of MEL-A using coconut water as the carbon source. Proximate analysis of coconut water indicated the presence of nutrients necessary for growth of the organism and production of desired metabolite. The amount of MEL produced using coconut water was 3.85 g/L (± 0.35) with 74% of it being MEL-A when compared to 2.58 g/L (± 0.15) with 60% being MEL-A using glycerol, a conventional carbon source. MEL-A from coconut water consisted of 38.1% long-chain saturated fatty acids (C16:0 and C18:0) whereas with glycerol it was 9.6%. The critical micellar concentration of the biosurfactant from coconut water was 2.32 ± 0.21 µM when compared to 4.41 ± 0.25 µM from glycerol. The stability of O/W emulsion was reduced by 50% and 90% after incubation for 8 h in the case of MEL-A from coconut water and glycerol respectively when compared to synthetic surfactant, Tween-20. MEL-A from both the sources exhibited free radical scavenging activity (DPPH assay) in a dose-dependent manner wherein MEL-A from coconut water showed two fold higher activity than the other. The interaction of coconut water MEL-A with DPPC for drug encapsulation applications was also studied. The DSC measurements showed the differences in the interaction of drugs with DPPC/MEL-A liposome. The differences were also observed in the solubility of drugs after encapsulation with DPPC/MEL-A liposome.

中文翻译:

从甘油和椰子水中制备 MEL-A 及其理化性质的研究

这项工作报告了使用椰子水作为碳源生产 MEL-A。椰子水的近似分析表明存在生物体生长和所需代谢物产生所必需的营养物质。使用椰子水生产的 MEL 量为 3.85 g/L (± 0.35),其中 74% 为 MEL-A,而使用甘油(一种常规碳)产生的 MEL 量为 2.58 g/L (± 0.15),60% 为 MEL-A来源。来自椰子水的 MEL-A 由 38.1% 的长链饱和脂肪酸(C16:0 和 C18:0)组成,而甘油则为 9.6%。椰子水生物表面活性剂的临界胶束浓度为 2.32 ± 0.21 µM,而甘油为 4.41 ± 0.25 µM。与合成表面活性剂 Tween-20 相比,来自椰子水和甘油的 MEL-A 在孵育 8 小时后,O/W 乳液的稳定性分别降低了 50% 和 90%。两种来源的 MEL-A 都以剂量依赖性方式表现出自由基清除活性(DPPH 测定),其中来自椰子水的 MEL-A 显示出比其他来源高两倍的活性。还研究了椰子水 MEL-A 与 DPPC 在药物包封应用中的相互作用。DSC 测量显示药物与 DPPC/MEL-A 脂质体相互作用的差异。在用 DPPC/MEL-A 脂质体封装后,药物的溶解度也存在差异。两种来源的 MEL-A 都以剂量依赖性方式表现出自由基清除活性(DPPH 测定),其中来自椰子水的 MEL-A 显示出比其他来源高两倍的活性。还研究了椰子水 MEL-A 与 DPPC 在药物包封应用中的相互作用。DSC 测量显示药物与 DPPC/MEL-A 脂质体相互作用的差异。在用 DPPC/MEL-A 脂质体封装后,药物的溶解度也存在差异。两种来源的 MEL-A 都以剂量依赖性方式表现出自由基清除活性(DPPH 测定),其中来自椰子水的 MEL-A 显示出比其他来源高两倍的活性。还研究了椰子水 MEL-A 与 DPPC 在药物包封应用中的相互作用。DSC 测量显示药物与 DPPC/MEL-A 脂质体相互作用的差异。在用 DPPC/MEL-A 脂质体封装后,药物的溶解度也存在差异。
更新日期:2020-06-01
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