List of Articles سیال فوق بحرانی

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  1 - Modeling of Supercritical Extraction of Essential Oil from Orange Peel
  Marjan Haghayegh Seyyed Ali Vaziri Fatemeh Zabihi Mohammad Hassan Eikani
  Introduction: Supercritical fluid extraction (SCFE) is a promising technique that has been attracted by some scientist recently due to the moderate operational condition.Moreover, SCFE products are pure and free of residual solvents. Mathematical modeling of supercritic More

  Introduction: Supercritical fluid extraction (SCFE) is a promising technique that has been attracted by some scientist recently due to the moderate operational condition.Moreover, SCFE products are pure and free of residual solvents. Mathematical modeling of supercritical extraction is a useful tool for deducing the SCF extraction systems, prediction of optimum operational conditions and system design variables, and scale-up to the pilot and industrial scales. Materials and Methods: A new mathematical model modified by Sovova, based on the concept of broken and intact cells, has been applied to understand the variables effect on extraction efficiency in a SCF extraction system. System was made in order to extract the essential oil from orange peel. This model simulates the experimental data points adequately for two separate time using combined pattern of phase equilibrium equations, solute/matrix interaction and internal diffusion rules in the solid particles. Model equations for plug flow are ordinary differential equations and are solved by matlab using numirical method. A number of physical parameters have been determined by experimental data fitting.Results: Extraction curves have been presented on the form of extraction yield versus relative amount of passed solvent. The effect of operational parameters including grinding efficiency, bed void fraction, number of mixers and external mass transfer coefficient have been also investigated.Conclusion: The most desirable result is obtained from grinding efficiency and external mass transfer coefficient of 0.7 and 0.011 respectively, within 20 mixers. The model results present a good agreement with the experimental results. Average absolute deviation between experimental data and the modeling results is about 6%. Manuscript profile
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  2 - Extraction of Phenolic Compounds and Tocopherols from Ferula Persica and Evaluating the Effect of the Extract on the Stability of Sunflower Seed Oil as an Alternative to the Synthetic Antioxidant
  B. Mehdinia Lichaei R. Esmaeilzadeh Kenari Gh. Dinpanah
  Introduction: The addition of antioxidants is one of the ways to protect the oil from oxidation. The aim of this research is to obtain ferula persica plant extract using supercritical fluid method and measure the phenolic compounds and tocopherols and also to evaluate t More

  Introduction: The addition of antioxidants is one of the ways to protect the oil from oxidation. The aim of this research is to obtain ferula persica plant extract using supercritical fluid method and measure the phenolic compounds and tocopherols and also to evaluate the effect on the oxidative stability of sunflower seed oil during storage. Materials and Methods: Using supercritical fluids (SCF), the ethanolic extracts at different concentrations (100, 1500, 2000 and 2500 ppm) were prepared. Total amount of phenolic compounds and tocopherols in the extracts were determined by the Folin–Ciocalteu and spectrophotometry procedures, respectively. The antioxidant activity was evaluated and the concentration of 2500 ppm showed the highest antioxidant activity, therefore, this concentration was selected and added to sunflower seed oil. The oil was kept at room temperature for 60 days and peroxide value, carbonyl number, oxidative stability index, total polar compounds and acid value were measured every 15 day and compared with the synthetic antioxidant (TBHQ 100 ppm). Results: The concentrations of phenolic compounds and tocopherols in the SCF extract were determined and found to be 1495.81 mg as gallic acid and 58.6 mg alpha-tocopherol per 100 gram of extract. Conclusion: Ferula persica extract at the concentration of 2500 ppm due to the presence of both phenolic compounds and tocopherols exhibited antioxidant acivity in sunflower seed oil and have the ability similar to TBHQ that results in increased oxidative stability of the substrate, therefore, Ferula persica that is a natural product might be considered as a potent antioxidant to improve the stability of oils and fats. Manuscript profile
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  3 - Effect of the solvent types and extraction conditions on the quality and antimicrobial characteristics of Paeonia officinalis L. extract
  Zahra Yaghobi koupaei Hajar Abbasi
  10.30495/jfh.2023.1979539.1390
  Paeonia officinalis L. is one of the species of the Paeoniaceae family. Its root has different effective compounds e.g., polyphenols, flavonoids, triterpenoids, tannins, and monoterpenes. It shows biological activities such as antibacterial, anti-oxidative, relaxing and More

  Paeonia officinalis L. is one of the species of the Paeoniaceae family. Its root has different effective compounds e.g., polyphenols, flavonoids, triterpenoids, tannins, and monoterpenes. It shows biological activities such as antibacterial, anti-oxidative, relaxing and anti-pain properties. This study evaluated the effect of three solvents, ethanol/water, water, and water/ethanol/hexane on extracting the active ingredients. These solvents were applied by the methods of immersion, immersion with ultrasonic waves, and the use of supercritical fluid carbon dioxide with auxiliary solvents. The efficiency, qualitative characteristics (pH, polyphenolic compounds and antioxidant properties) and antimicrobial properties of the extracts were evaluated by the well-diffusion method against Escherichia coli, Staphylococcus aureus, Salmonella Typhimurium and Candida albicans. Also, the MIC and MBC of the extracts on the activity of these organisms were determined. The results showed that the independent variables significantly affect the quantity and quality of the produced extracts (P ≤ 0.05). Using the water/ethanol, and the immersion method in combination with ultrasonic waves, the highest extract efficiency (17.66± 0.34), of the phenolic compounds (33.5±0.65) and antioxidant property (76±1.44) was obtained. The diameter of the inhibition zone for E. coli, S. aureus and C. albicans in the vicinity of this sample was more than others. Meanwhile, the inhibition zone of S. Typhimurium was larger in the presence of watery extract using the immersion method. The quantity and quality of the extract using supercritical fluid was lower than others. Manuscript profile
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  4 - Effects of supercritical fluid and distillation extraction methods on the yield, antioxidant and antifungal activities of Artemisia persica Boiss essential oil
  Parvin Ramak Vahid Karimian Asghar Sepahvand
  In this study, aerial parts of Artemisia persica in blooming satage were collected from Noor Abad Research Farm (Lorestan province, Iran) in the summer of 2017. Essential oils of plants were extracted by water distillation and supercritical fluid extraction (SFE) method More

  In this study, aerial parts of Artemisia persica in blooming satage were collected from Noor Abad Research Farm (Lorestan province, Iran) in the summer of 2017. Essential oils of plants were extracted by water distillation and supercritical fluid extraction (SFE) methods and were analyzed by using GC/MS device. Antifungal properties of essential oils were evaluated on Microsporum canis, Trichophyton rubrum, Epidermophyton floccosum, and Trichophyton mentagrophytes strains by broth microdilution method. Antioxidant activity of the essential oils was also evaluated by two free radical scavenging tests, viz. 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azino bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS). Essential oil yields were 1.7% and 1.7-5.7% in water distillation and SFE methods, respectively. Major compounds identified in the SFE method were Davanone (29%), lacintafuran H (18.1%), C-artedoglacia oxide (8.5%), and neurodevnet (7.6%). Davanone (22%), lacintaphoran G (7.1%), and D-artedoglacia oxide (6%) were the predominant compounds detected in water distillation method. The essential oil extracted by water distillation had the highest antifungal effects on E. floccosum and T. montagrophytes strains with MFC and MIC of 32 µg/mL. Water extracted essential oil presented the highest free radical scavenging capacity in DPPH and ABTS tests with IC50 values of 20.32 and 14.23 μg/ml, respectively. Manuscript profile
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  5 - The extraction and identification of compounds in sea urchin (Echinodermata mathaei) with Supercritical Fluid Extraction
  T. Naji M. Ghomi S. Bagheri Ziari
  The existing compounds in a species of sea urchin (Echinodermata mathaei) were identified. The study area was in sub-tidal waters of Bandar- e - lengeh within the geographic east longitude 54° 53.312 and north latitude 26° 32.739. Random sampling took the full t More

  The existing compounds in a species of sea urchin (Echinodermata mathaei) were identified. The study area was in sub-tidal waters of Bandar- e - lengeh within the geographic east longitude 54° 53.312 and north latitude 26° 32.739. Random sampling took the full tide by diver. In order to identify the components of this organism, five sea urchins with an average length of about 8.5±1 cm and a width of 7±1 cm and a weight of 66.680±10 grams were evaluated. After preparation, samples were extracted by supercritical fluid (Model Suprex MPS/225 Manufacturing Co. America Pittsburgh) and identified by gas chromatography (Model 5890 Manufacturing Co. Hewlett Packard) coupled with mass spectroscopy (Model 5970 Manufacturing Co. Hewlett Packard). Compounds identified in this sea urchin with SFE method under optimal conditions were: 2.85% n-Hexadecanoic acid, methyl ester, 1.9% Octadecanoic acid, 3.03% Cyclo propanenonanoic acid, 77.4% Cholesterol, 6.45% Ergosta-5, 22-dien-3-ol, 5.15% Fucosterol. Among these compounds, fucosterol and n-Hexadecanoic acid had antioxidant and anti-inflammatory properties respectively. Also Ergosta-5; 22-dien-3-ol had the germination properties. Manuscript profile