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Comparison of lipid extraction methods for the microalgae Acutodesmus obliquus

International Journal of Agricultural and Biological Engineering 2018年第5期11卷 211-217页

作者： Diana Ximena Hurtado Claudia Lorena Garzón-Castro jhon cortés-romero Edisson Tello Camacho Bioprospecting and CAPsAB Research Groups Faculty of EngineeringUniversidad de La SabanaCundinamarca 53753Colombia Biosciences Doctoral Program Faculty of EngineeringUniversidad de La SabanaCundinamarca 53753Colombia Department of Electrical and Electronic Engineering Universidad Nacional de ColombiaBogotá53753Colombia

Microalgae are widely used in the pharmaceutical and energy industries,therefore the conditions for their cultivation and extraction methods play an important role in the profiling and acquisition of *** efficiency of lipid extraction from microalgae has attracted great interest from industry because of the wide variety of lipids and amounts that can be *** obliquus(scenedesmus obliquus UTEX 393)was used in this *** was cultivated in Bold 3N medium modified with 75%nitrogen at 25℃,pH 6.8,125 r/min and a photoperiod of 18/6 h and illuminated with white light provided by a Light-Emitting Diode surface Mount Device extensions(LED sMD)with an intensity of 1200μE/(m^(2)·s).The cells were stained with the Red Nile(RN)technique to indicate lipid *** extraction methods were compared,classical,microwave(MW),soxhlet,and ultrasound(Us),using the same solvent proportions(hexane:chloroform:methanol=1:2:3).All samples were analyzed with Fourier Transform Infrared spectroscopy(FTIR)and Gas Chromatography coupled to Mass spectrometry(GC-Ms).The results showed:1)lipid production detected by RN was consistent with microalgal growth;2)the MW technique was the best extraction method,according to the statistical analysis through Randomized Complete Block(RCB)design and performance of 4.6%;and 3)the presence of saturated and unsaturated acids was indicated by FTIR ***-Ms was able to identify palmitic and linoleic acids as the likely major constituents of the sample.

关键词： Acutodesmus obliquus lipid extraction trans-esterification Red Nile(RN)

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