Exploiting microalgae as a source of essential fatty acids by supercritical fluid extraction of lipids: Comparison between Scenedesmus obliquus, Chlorella protothecoides and Nannochloropsis salina

2014 ◽  
Vol 92 ◽  
pp. 311-318 ◽  
Author(s):  
M. Solana ◽  
C.S. Rizza ◽  
A. Bertucco
Keyword(s):  
Fatty Acids ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Essential Fatty Acids ◽  
Scenedesmus Obliquus ◽  
Chlorella Protothecoides ◽  
Nannochloropsis Salina ◽  
Fluid Extraction

Mathematical Modeling of Supercritical Fluid Extraction of Fatty Acids from Trout Powder: Correlation of Mass Transfer Parameters

2007 ◽  
Vol 2 (3) ◽  
Author(s):  
Hamzeh Zakizadeh Nei Nei ◽  
Shohreh Fatemi ◽  
Alireza Salimi ◽  
Mohammd Reza Mehrnia
Keyword(s):  
Fatty Acids ◽  
Mass Transfer ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Essential Fatty Acids ◽  
Model Parameters ◽  
Operational Parameters ◽  
Fluid Extraction ◽  
Operational Conditions ◽  
Pharmaceutical Industries

Supercritical fluid extraction (SCFE) has been introduced as an excellent method especially for food and pharmaceutical industries. Trout powder was selected as a source of high amount of valuable materials such as essential fatty acids (FAs). In this work, a mathematical model is introduced to simulate the transitional behavior of the extraction process. This model is able to explain the variation of FAs concentration profile in the bulk and solid phases versus the time of extraction. Effects of main operational parameters such as pressure (280 to 340 bar) and temperature (310 to 326 K) on the extraction yields were investigated in the supercritical fluid extraction system of laboratory scale and the results were compared with that information obtained from the solution of the model. In order to describe solid-solvent interactions, a linear equilibrium relationship was used in the model. Partial differential mass balance equations for the solid and fluid phases were solved numerically using an implicit method. The effective diffusivity into the particle pores and mass transfer coefficient to the bulk phase were the model parameters and they were correlated at different temperatures and pressures by fitting the results of the model to the experiments. The axial diffusivity and equilibrium coefficient of solid-solvent were kept constant in whole range of the operational conditions and they were estimated as the model constants.

scholarly journals Extraction of Added-Value Triterpenoids from Acacia dealbata Leaves Using Supercritical Fluid Extraction

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1159
Author(s):  
Vítor H. Rodrigues ◽  
Marcelo M. R. de Melo ◽  
Inês Portugal ◽  
Carlos M. Silva
Keyword(s):  
Mass Spectrometry ◽  
Fatty Acids ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Extraction Yield ◽  
Added Value ◽  
Fluid Extraction ◽  
Acacia Dealbata ◽  
First Time ◽  
Total Extraction

Forestry biomass is a by-product which commonly ends up being burnt for energy generation, despite comprising valuable bioactive compounds with valorisation potential. Leaves of Acacia dealbata were extracted for the first time by supercritical fluid extraction (SFE) using different conditions of pressure, temperature and cosolvents. Total extraction yield, individual triterpenoids extraction yields and concentrations were assessed and contrasted with Soxhlet extractions using solvents of distinct polarity. The extracts were characterized by gas chromatography coupled to mass spectrometry (GC-MS) and target triterpenoids were quantified. The total extraction yields ranged from 1.76 to 11.58 wt.% and the major compounds identified were fatty acids, polyols, and, from the triterpenoids family, lupenone, α-amyrin and β-amyrin. SFE was selective to lupenone, with higher individual yields (2139–3512 mg kgleaves−1) and concentrations (10.1–12.4 wt.%) in comparison to Soxhlet extractions, which in turn obtained higher yields and concentrations of the remaining triterpenoids.

Supercritical Fluid Extraction of Lipids and Enrichment of DHA from Freshwater Fish Processing Wastes in Thailand

2014 ◽  
Vol 1044-1045 ◽  
pp. 444-447 ◽  
Author(s):  
Thitiphan Chimsook
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Freshwater Fish ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Omega 3 ◽  
Fish Processing ◽  
Fluid Extraction ◽  
Processing Wastes ◽  
By Products

Nowadays, an awareness of health benefits of omega-3 has been found. Polyunsaturated fatty acids, especially DHA, are more attention due to their role in human health. Hence, this study investigated the potential of by-products as freshwater fish source of omega-3 polyunsaturated fatty acids (omega-3 PUFAs). The by-products of processing accounted for approximately 55% of the catfish industry. Supercritical fluid extraction (SFE) of the by-products at 35 MPa, 40 ◦C, ethanol (95%, v/v) as the co-solvent, and the mass ratio of by-products to co-solvent as 1:1 generated a lipid yield at 30.9% and 21.5 % docosahexaenoic acid (DHA). Additionally, urea complexation was an effective tool to enrich and purify DHA from lipids. DHA purity increased from 21.5% to 38.4% under the optimum complexation condition.

scholarly journals Recovery of biologically active compounds from stinging nettle leaves part I: supercritical fluid extraction

2021 ◽  
Author(s):  
Saša Đurović ◽  
Saša Šorgić ◽  
Saša Popov ◽  
Lato Pezo ◽  
Pavle Mašković ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Kinetic Equations ◽  
Principal Component ◽  
Extraction Process ◽  
Biologically Active ◽  
Cytotoxic Activities ◽  
Fluid Extraction ◽  
Stinging Nettle

Abstract Stinging nettle (Urtica dioica L.) is annual plant from Urticaceae family growing wild all over the world. Throughout the history, this plant found its place as a both food and medicine. Due to the nonsufficient study, this work aimed to isolate the bioactive compounds from the stinging nettle leaves by supercritical fluid extraction. Extracts were analyzed and assessed for antioxidant and cytotoxic activities. Main fatty acids were α-linolenic, palmitic, and linoleic acids in all six samples. Beside fatty acids, chlorophylls and carotenoids were also found in all samples. Four empirical kinetic equations were effectively utilized for kinetic modeling of supercritical fluid extraction of stinging nettle leaves oil. As per proper statistical features, empirical models show good concurrence with experimental data. The numerical modeling of a process is gainful to foresee the process conduct and furthermore extend the methodology from laboratory to industrial scales. The principal component analysis was used to visualize the fatty acids profile and antioxidant capacity and cytotoxic activity of extract obtained from stinging nettle leaves. It was found that both composition and activity were strongly dependent on the parameters of the extraction process.

scholarly journals Supercritical Fluid Extraction of Berry Seeds: Chemical Composition and Antioxidant Activity

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Graziele Gustinelli ◽  
Lovisa Eliasson ◽  
Cecilia Svelander ◽  
Thomas Andlid ◽  
Leif Lundin ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Antioxidant Activity ◽  
Vitamin E ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Antioxidant Compounds ◽  
Fluid Extraction ◽  
Black Currant

The influence of supercritical fluid extraction (SFE) and solvent extraction of oils from cloudberry, bilberry, and black currant seeds on the yield, chemical properties, and recovery of antioxidant compounds was investigated. SFE was performed for 1 h at 350 bar and at 50°C and 80°C. Fatty acids, vitamin E, carotenoids, and free radical-scavenging activity (DPPH) were assayed. SFE at 80°C resulted in higher oil yields for cloudberry and black currant seeds. The oils were rich in polyunsaturated fatty acids (PUFAs) (66.8%–75.9% w/w), with high percentages of linoleic and α-linolenic acids. The black currant seed extracts had the highest concentrations of vitamin E (range, 113.0–241.8 mg/100 g oil) and carotenoids (range, 11.5–32.3 mg/100 g oil) and the highest antioxidant activity. The cloudberry seed oils also had high antioxidant content and activity. These findings indicate the potential of SFE for the recovery of PUFA and antioxidant compounds in berry by-products.

Supercritical fluid extraction of carotenoids and chlorophylls a, b and c, from a wild strain of Scenedesmus obliquus for use in food processing

2013 ◽  
Vol 116 (2) ◽  
pp. 478-482 ◽  
Author(s):  
A. Catarina Guedes ◽  
Maria S. Gião ◽  
Ana A. Matias ◽  
Ana V.M. Nunes ◽  
Manuela E. Pintado ◽  
...  
Keyword(s):  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Food Processing ◽  
Scenedesmus Obliquus ◽  
Wild Strain ◽  
Fluid Extraction
Sign in / Sign up

Export Citation Format

Share Document