The Experts below are selected from a list of 13605 Experts worldwide ranked by ideXlab platform
Federica Menichini - One of the best experts on this subject based on the ideXlab platform.
-
chemical composition and bioactivity of citrus medica l cv diamante essential oil obtained by Hydrodistillation cold pressing and supercritical carbon dioxide extraction
Natural Product Research, 2011Co-Authors: Rosa Tundis, Marco Bonesi, Bruno De Cindio, Monica Rosa Loizzo, Filomena Conforti, Giancarlo A Statti, Roberta Menabeni, Ruggero Bettini, Federica MenichiniAbstract:The chemical composition of the essential oil of Citrus medica L. cv. Diamante peel obtained by Hydrodistillation, cold-pressing and supercritical carbon dioxide extraction techniques was determined by GC/MS analysis. Forty-six components were fully characterised. Limonene and γ-terpinene were the major components of the oils obtained by Hydrodistillation (HD) and cold-pressing (CP), while citropten was the major constituent in the oil obtained by supercritical carbon dioxide extraction (SFE). Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities were evaluated. The essential oil obtained by Hydrodistillation exerted the highest inhibitory activity against BChE (IC50 value of 154.6 µg mL−1) and AChE (IC50 value of 171.3 µg mL−1). Interestingly, the oil obtained by cold-pressing exhibited a selective inhibitory activity against AChE. The essential oils have also been evaluated for the inhibition of NO production in LPS induced RAW 264.7 macrophages. The oil obtained by hydrodis...
-
chemical composition and bioactivity of citrus medica l cv diamante essential oil obtained by Hydrodistillation cold pressing and supercritical carbon dioxide extraction
Natural Product Research, 2011Co-Authors: Federica Menichini, Rosa Tundis, Marco Bonesi, Bruno De Cindio, Monica Rosa Loizzo, Filomena Conforti, Giancarlo A Statti, Roberta Menabeni, Ruggero Bettini, Francesco MenichiniAbstract:The chemical composition of the essential oil of Citrus medica L. cv. Diamante peel obtained by Hydrodistillation, cold-pressing and supercritical carbon dioxide extraction techniques was determined by GC/MS analysis. Forty-six components were fully characterised. Limonene and γ-terpinene were the major components of the oils obtained by Hydrodistillation (HD) and cold-pressing (CP), while citropten was the major constituent in the oil obtained by supercritical carbon dioxide extraction (SFE). Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities were evaluated. The essential oil obtained by Hydrodistillation exerted the highest inhibitory activity against BChE (IC₅₀ value of 154.6 µg mL⁻¹) and AChE (IC₅₀ value of 171.3 µg mL⁻¹. Interestingly, the oil obtained by cold-pressing exhibited a selective inhibitory activity against AChE. The essential oils have also been evaluated for the inhibition of NO production in LPS induced RAW 264.7 macrophages. The oil obtained by Hydrodistillation exerted a significant inhibition of NO production with an IC₅₀ value of 17 µg mL⁻¹ (IC₅₀ of positive control 53 µg mL⁻¹).
Mahfud Mahfud - One of the best experts on this subject based on the ideXlab platform.
-
kinetic studies on extraction of essential oil from sandalwood santalum album by microwave air Hydrodistillation method
alexandria engineering journal, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Abstract Essential oil from sandalwood is commonly obtained by conventional extraction methods which requires great energy, significant amount of solvents, and quite a long process time. Therefore, the use of new ‘green method’ for extracting essential oil with minimum/low energy, solvents, and time needs to be considered. One extraction method that has been successfully developed is microwave Hydrodistillation method. This research employs a method developed from microwave Hydrodistillation, that is microwave air-Hydrodistillation for optimizing the extraction of essential oil. The purpose of this study was to examine the effect of the presence and absence of additional air flow to the microwave Hydrodistillation method. The material used in this study includes sandalwood powder. The extractions by microwave Hydrodistillation and microwave air-Hydrodistillation methods were done on the power of 600 W; the ratio of the raw material to be extracted and the solvent was 0.05 g mL−1 and the extraction time was 120 min. In the extraction by microwave air-Hydrodistillation, the rates of air flow used were 0.1, 0.5, 1.5, 3.0, and 5.0 L/min. The results of the research show that the extraction of sandalwood oil by microwave air-Hydrodistillation is faster and produces higher yields compared to the extraction by microwave Hydrodistillation method. Based on kinetics modeling that has been done, it can be said that the second-order kinetic model more can represent well the experimental results of sandalwood oil extraction by microwave Hydrodistillation and microwave air-Hydrodistillation methods when compared with the first-order kinetic model. The testing of the physical properties of the sandalwood oil indicates that essential oil obtained by microwave Hydrodistillation and microwave air-Hydrodistillation has the same quality (refractive index and specific gravity). Further, the testing of the chemical properties of the sandalwood oil shows that essential oil obtained by microwave air-Hydrodistillation has better quality (flavor) compared to the oil obtained by microwave Hydrodistillation.
-
microwave Hydrodistillation for extraction of essential oil from pogostemon cablin benth analysis and modelling of extraction kinetics
Journal of Applied Research on Medicinal and Aromatic Plants, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Abstract In this study the extraction of essential oil from Pogostemon cablin Benth done by using microwave Hydrodistillation. In the patchouli oil extraction with microwave Hydrodistillation method is studied the effect of the size of the material (intact and chopped leaves) and the effect of the ratio of raw material to be extracted with a solvent to the yield of patchouli oil. Besides it also studied the effect of microwave power to the yield of patchouli oil and kinetics during the extraction process. Then, a microwave Hydrodistillation model based on the assumption of a second-order mechanism was developed to predict the rate constant of extraction, the saturated extraction capacity and the initial extraction rate with various temperatures in two microwave powers, 400 and 600 W. Furthermore, the activation energies were determined as based on the second-order rate constants of extraction used for the model building. The values resulting from these calculations and experiments were compared and discussed.
-
the extraction of essential oils from patchouli leaves pogostemon cablin benth using a microwave air Hydrodistillation method as a new green technique
RSC Advances, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Nowadays, patchouli oil extraction in Indonesia is generally carried out using conventional methods, although such methods require large amounts of energy, solvents in significant amounts, and quite a long time. Therefore, in this study, patchouli oil extraction was done using a microwave Hydrodistillation method. In addition to optimizing the extraction process of patchouli oil, this study used a development of the microwave Hydrodistillation method, microwave air-Hydrodistillation. Based on this research, it can be seen that patchouli oil extraction using the microwave air-Hydrodistillation method is faster, produces a better yield and a higher accumulation of recovery than extraction using the standard microwave Hydrodistillation method. A gas chromatography-mass spectrometry analysis of the composition of the compounds in the patchouli oils shows that the heavy fraction components obtained by microwave air-Hydrodistillation are more numerous than those obtained using the microwave Hydrodistillation method. Furthermore, an analysis of the electric consumption and the environmental impact of the microwave air-Hydrodistillation method for patchouli oil extraction indicates that this method can be considered a new green technique.
-
preliminary study kinetics of oil extraction from sandalwood by microwave assisted Hydrodistillation
Microelectronics Systems Education, 2016Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Sandalwood and its oil, is one of the oldest known perfume materials and has a long history (more than 4000 years) of use as mentioned in Sanskrit manuscripts. Sandalwood oil plays an important role as an export commodity in many countries and its widely used in the food, perfumery and pharmaceuticals industries. The aim of this study is to know and verify the kinetics and mechanism of microwave-assisted Hydrodistillation of sandalwood based on a second-order model. In this study, microwave-assisted Hydrodistillation is used to extract essential oils from sandalwood. The extraction was carried out in ten extraction cycles of 15 min to 2.5 hours. The initial extraction rate, the extraction capacity and the second-order extraction rate constant were calculated using the model. Kinetics of oil extraction from sandalwood by microwave-assisted Hydrodistillation proved that the extraction process was based on the second-order extraction model as the experimentally done in three different steps. The initial extraction rate, h, was 0.0232 g L-1 min-1, the extraction capacity, C S, was 0.6015 g L-1, the second-order extraction rate constant, k, was 0.0642 L g-1 min-1 and coefficient of determination, R 2, was 0.9597.
Asgar Farahnaky - One of the best experts on this subject based on the ideXlab platform.
-
ohmic assisted Hydrodistillation technology a review
Trends in Food Science and Technology, 2018Co-Authors: Mohsen Gavahian, Asgar FarahnakyAbstract:Abstract Background Volumetric heating techniques such as ohmic heating have emerged as alternatives to conventional processing methods for diverse applications in the food industry. One of the novel applications of ohmic heating is ohmic-assisted Hydrodistillation (OAHD), which utilizes the volumetric heating benefits to overcome traditional distillation shortcomings. This technique proffers benefits such as saving time and energy and has gained increasing interest as a preferred approach for ethanol distillation and essential oil extraction from various plant materials. Scope and approach This paper reviews the principles and current applications of OAHD. The effects of OAHD on process time, energy consumption, and distillate quality are discussed. Considerations for industrial application of OAHD are highlighted and its salient drawbacks are also taken into account. Key findings and conclusions Advantages of OAHD over conventional distillation include high thermal efficiency, short processing time and reduced operational cost. Further research on safety and sustainability along with economic study are prerequisites for commercial application of this technology.
-
ethanol concentration of fermented broth by ohmic assisted Hydrodistillation
Innovative Food Science and Emerging Technologies, 2016Co-Authors: Mohsen Gavahian, Asgar Farahnaky, Mohammad Shavezipur, Sudhir K SastryAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) as an innovative extraction method was employed to concentrate ethanol from corn beer. OAHD reduces the time and energy required for distillation of bioethanol production compared to traditional method. OAHD process was compared to traditional Hydrodistillation (HD) for 3 l of 13% (v/v) beer at a constant wattage of 168 W. Test results indicate that the required energy for separation of ethanol in OAHD is 77% less than HD. Moreover, OAHD completed the distillation process in 70.6 ± 1.8 min while HD required 116.1 ± 7.8 min. The concentrations of ethanol in the final distilled product from both methods were similar (56.5% ± 1.3 for OAHD vs. 52.3% ± 4.0 for HD). Interestingly, the process control in OAHD is faster and distillation can be stopped quickly, and consequently, it will contain less unwanted distillate in comparison with HD. The findings of this study introduce OAHD as a potentially economical and environmentally friendly method for bioethanol distillation process. Industrial relevance In this research, ohmic-assisted Hydrodistillation (OAHD) was used as an advanced Hydrodistillation (HD) technique and compared with traditional HD in concentration of ethanol from industrial fermented corn beer. OAHD method was quicker, more economical, more sustainable and with a better ability of process control than HD method. Such advantages can make OAHD as an alternative technique for the production of larger quantities and higher concentrations of ethanol by scaling up the equipments and process in biofuel factories, instead of the conventional HD process.
-
effect of applied voltage and frequency on extraction parameters and extracted essential oils from mentha piperita by ohmic assisted Hydrodistillation
Innovative Food Science and Emerging Technologies, 2015Co-Authors: Mohsen Gavahian, Reza Farhoosh, Katayoun Javidnia, Fakhri Shahidi, Asgar FarahnakyAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) is a new method proposed for extraction of essential oils in which ohmic heating technology is combined with distillation. In this study, different frequencies (25, 50 and 100 Hz) as well as high and low intensity OAHD (220 and 380 V) were applied on aerial parts of Mentha piperita L. and the results were compared with those of the conventional Hydrodistillation (HD). The results showed that high and low intensity OAHD methods had the extraction times of 13.54 and 19.71 min, respectively, while this value was about 1 h for HD. Scanning electron micrographs of mint showed a sudden eruption of essential oil glands for all OAHD samples. GC–MS analysis did not indicate any noticeable changes in the compounds of all extracted essential oils. The results of this study showed that higher applied voltage can speed up OAHD and confirmed this emerging technology as a green technology (considering fossil fuels as the main source of electrical energy). Industrial relevance The quality and quantity of essential oils extracted from herbs and other raw materials are affected by the extraction method. In this research different frequencies (25, 50 and 100 Hz) and also high and low intensity OAHD (220 and 380 V, applicable in industries in many regions) of ohmic-assisted Hydrodistillation (OAHD), as an innovative and emerging technology, were used and compared with traditional Hydrodistillation in extraction of essential oils from the aerial parts of Mentha piperita L. (peppermint). All OAHD treatments were more economical and more environmentally friendly than Hydrodistillation method. In addition, high intensity OAHD method not only can enhance the amount of extracted essential oil but also was the quickest method and consequently can be a valuable industrial alternative for extraction of essential oils.
-
comparison of ohmic assisted Hydrodistillation with traditional Hydrodistillation for the extraction of essential oils from thymus vulgaris l
Innovative Food Science and Emerging Technologies, 2012Co-Authors: Mohsen Gavahian, Katayoun Javidnia, Asgar Farahnaky, Mahsa MajzoobiAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) is an advanced Hydrodistillation (HD) technique utilizing ohmic heating process and could be considered as a novel method for the extraction of essential oils. One of the major problems with traditional methods is long extraction time. OAHD of essential oils from the aerial parts of Thymus vulgaris L. (common thyme) was studied and the results were compared with those of the conventional HD. The results showed that OAHD method had the extraction time of 24.75 min while this value was about 1 h for HD. Scanning electron micrographs of thyme leaves showed a sudden eruption of essential oil glands and their surrounding area for OAHD samples. GC–MS analysis did not indicate any noticeable changes in the compounds of the essential oils obtained by OAHD in comparison with HD. Results of this study introduced OAHD as a green technology because of less energy required per ml of essential oil extraction. Industrial relevance The quality and quantity of essential oils extracted from herbs and other raw materials are affected by the extraction method. In this research ohmic-assisted Hydrodistillation (OAHD) was used as an advanced and novel Hydrodistillation (HD) technique and compared with traditional Hydrodistillation in extraction of essential oils from the aerial parts of Thymus vulgaris L. (common thyme). OAHD method was quicker, more economical and environmentally friendly than Hydrodistillation method. The results of this study introduced OAHD as a green technology.
-
ohmic assisted Hydrodistillation of essential oils from zataria multiflora boiss shirazi thyme
International Journal of Food Science and Technology, 2011Co-Authors: Mohsen Gavahian, Katayoun Javidnia, Asgar Farahnaky, Mahsa Majzoobi, Mohammad Jamal Saharkhiz, Gholamreza MesbahiAbstract:Summary Ohmic-assisted Hydrodistillation (OAHD) is a combination of ohmic heating and distillation, and could be considered as a novel method for the extraction of essential oils. Major problems with traditional methods are long extraction time and lower purity of the extract. In this study, OAHD was applied as an economic and green technology for the extraction of essential oils from Zataria multiflora Boiss. (Shirazi thyme) aerial parts and the results were compared to those obtained from Hydrodistillation (HD) as a conventional method. The results showed that OAHD method had the extraction time of 32.21 ± 2.59 min while this value was about 57.21 ± 2.33 min for Hydrodistillation (HD). Scanning electron micrographs of thyme leaves showed a sudden eruption of essential oil glands and their surrounding area for OAHD samples. GC–MS analysis indicated that both methods of OAHD and HD can extract the same compounds.
Heri Septya Kusuma - One of the best experts on this subject based on the ideXlab platform.
-
kinetic studies on extraction of essential oil from sandalwood santalum album by microwave air Hydrodistillation method
alexandria engineering journal, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Abstract Essential oil from sandalwood is commonly obtained by conventional extraction methods which requires great energy, significant amount of solvents, and quite a long process time. Therefore, the use of new ‘green method’ for extracting essential oil with minimum/low energy, solvents, and time needs to be considered. One extraction method that has been successfully developed is microwave Hydrodistillation method. This research employs a method developed from microwave Hydrodistillation, that is microwave air-Hydrodistillation for optimizing the extraction of essential oil. The purpose of this study was to examine the effect of the presence and absence of additional air flow to the microwave Hydrodistillation method. The material used in this study includes sandalwood powder. The extractions by microwave Hydrodistillation and microwave air-Hydrodistillation methods were done on the power of 600 W; the ratio of the raw material to be extracted and the solvent was 0.05 g mL−1 and the extraction time was 120 min. In the extraction by microwave air-Hydrodistillation, the rates of air flow used were 0.1, 0.5, 1.5, 3.0, and 5.0 L/min. The results of the research show that the extraction of sandalwood oil by microwave air-Hydrodistillation is faster and produces higher yields compared to the extraction by microwave Hydrodistillation method. Based on kinetics modeling that has been done, it can be said that the second-order kinetic model more can represent well the experimental results of sandalwood oil extraction by microwave Hydrodistillation and microwave air-Hydrodistillation methods when compared with the first-order kinetic model. The testing of the physical properties of the sandalwood oil indicates that essential oil obtained by microwave Hydrodistillation and microwave air-Hydrodistillation has the same quality (refractive index and specific gravity). Further, the testing of the chemical properties of the sandalwood oil shows that essential oil obtained by microwave air-Hydrodistillation has better quality (flavor) compared to the oil obtained by microwave Hydrodistillation.
-
microwave Hydrodistillation for extraction of essential oil from pogostemon cablin benth analysis and modelling of extraction kinetics
Journal of Applied Research on Medicinal and Aromatic Plants, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Abstract In this study the extraction of essential oil from Pogostemon cablin Benth done by using microwave Hydrodistillation. In the patchouli oil extraction with microwave Hydrodistillation method is studied the effect of the size of the material (intact and chopped leaves) and the effect of the ratio of raw material to be extracted with a solvent to the yield of patchouli oil. Besides it also studied the effect of microwave power to the yield of patchouli oil and kinetics during the extraction process. Then, a microwave Hydrodistillation model based on the assumption of a second-order mechanism was developed to predict the rate constant of extraction, the saturated extraction capacity and the initial extraction rate with various temperatures in two microwave powers, 400 and 600 W. Furthermore, the activation energies were determined as based on the second-order rate constants of extraction used for the model building. The values resulting from these calculations and experiments were compared and discussed.
-
the extraction of essential oils from patchouli leaves pogostemon cablin benth using a microwave air Hydrodistillation method as a new green technique
RSC Advances, 2017Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Nowadays, patchouli oil extraction in Indonesia is generally carried out using conventional methods, although such methods require large amounts of energy, solvents in significant amounts, and quite a long time. Therefore, in this study, patchouli oil extraction was done using a microwave Hydrodistillation method. In addition to optimizing the extraction process of patchouli oil, this study used a development of the microwave Hydrodistillation method, microwave air-Hydrodistillation. Based on this research, it can be seen that patchouli oil extraction using the microwave air-Hydrodistillation method is faster, produces a better yield and a higher accumulation of recovery than extraction using the standard microwave Hydrodistillation method. A gas chromatography-mass spectrometry analysis of the composition of the compounds in the patchouli oils shows that the heavy fraction components obtained by microwave air-Hydrodistillation are more numerous than those obtained using the microwave Hydrodistillation method. Furthermore, an analysis of the electric consumption and the environmental impact of the microwave air-Hydrodistillation method for patchouli oil extraction indicates that this method can be considered a new green technique.
-
preliminary study kinetics of oil extraction from sandalwood by microwave assisted Hydrodistillation
Microelectronics Systems Education, 2016Co-Authors: Heri Septya Kusuma, Mahfud MahfudAbstract:Sandalwood and its oil, is one of the oldest known perfume materials and has a long history (more than 4000 years) of use as mentioned in Sanskrit manuscripts. Sandalwood oil plays an important role as an export commodity in many countries and its widely used in the food, perfumery and pharmaceuticals industries. The aim of this study is to know and verify the kinetics and mechanism of microwave-assisted Hydrodistillation of sandalwood based on a second-order model. In this study, microwave-assisted Hydrodistillation is used to extract essential oils from sandalwood. The extraction was carried out in ten extraction cycles of 15 min to 2.5 hours. The initial extraction rate, the extraction capacity and the second-order extraction rate constant were calculated using the model. Kinetics of oil extraction from sandalwood by microwave-assisted Hydrodistillation proved that the extraction process was based on the second-order extraction model as the experimentally done in three different steps. The initial extraction rate, h, was 0.0232 g L-1 min-1, the extraction capacity, C S, was 0.6015 g L-1, the second-order extraction rate constant, k, was 0.0642 L g-1 min-1 and coefficient of determination, R 2, was 0.9597.
Mohsen Gavahian - One of the best experts on this subject based on the ideXlab platform.
-
ohmic assisted Hydrodistillation technology a review
Trends in Food Science and Technology, 2018Co-Authors: Mohsen Gavahian, Asgar FarahnakyAbstract:Abstract Background Volumetric heating techniques such as ohmic heating have emerged as alternatives to conventional processing methods for diverse applications in the food industry. One of the novel applications of ohmic heating is ohmic-assisted Hydrodistillation (OAHD), which utilizes the volumetric heating benefits to overcome traditional distillation shortcomings. This technique proffers benefits such as saving time and energy and has gained increasing interest as a preferred approach for ethanol distillation and essential oil extraction from various plant materials. Scope and approach This paper reviews the principles and current applications of OAHD. The effects of OAHD on process time, energy consumption, and distillate quality are discussed. Considerations for industrial application of OAHD are highlighted and its salient drawbacks are also taken into account. Key findings and conclusions Advantages of OAHD over conventional distillation include high thermal efficiency, short processing time and reduced operational cost. Further research on safety and sustainability along with economic study are prerequisites for commercial application of this technology.
-
ethanol concentration of fermented broth by ohmic assisted Hydrodistillation
Innovative Food Science and Emerging Technologies, 2016Co-Authors: Mohsen Gavahian, Asgar Farahnaky, Mohammad Shavezipur, Sudhir K SastryAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) as an innovative extraction method was employed to concentrate ethanol from corn beer. OAHD reduces the time and energy required for distillation of bioethanol production compared to traditional method. OAHD process was compared to traditional Hydrodistillation (HD) for 3 l of 13% (v/v) beer at a constant wattage of 168 W. Test results indicate that the required energy for separation of ethanol in OAHD is 77% less than HD. Moreover, OAHD completed the distillation process in 70.6 ± 1.8 min while HD required 116.1 ± 7.8 min. The concentrations of ethanol in the final distilled product from both methods were similar (56.5% ± 1.3 for OAHD vs. 52.3% ± 4.0 for HD). Interestingly, the process control in OAHD is faster and distillation can be stopped quickly, and consequently, it will contain less unwanted distillate in comparison with HD. The findings of this study introduce OAHD as a potentially economical and environmentally friendly method for bioethanol distillation process. Industrial relevance In this research, ohmic-assisted Hydrodistillation (OAHD) was used as an advanced Hydrodistillation (HD) technique and compared with traditional HD in concentration of ethanol from industrial fermented corn beer. OAHD method was quicker, more economical, more sustainable and with a better ability of process control than HD method. Such advantages can make OAHD as an alternative technique for the production of larger quantities and higher concentrations of ethanol by scaling up the equipments and process in biofuel factories, instead of the conventional HD process.
-
effect of applied voltage and frequency on extraction parameters and extracted essential oils from mentha piperita by ohmic assisted Hydrodistillation
Innovative Food Science and Emerging Technologies, 2015Co-Authors: Mohsen Gavahian, Reza Farhoosh, Katayoun Javidnia, Fakhri Shahidi, Asgar FarahnakyAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) is a new method proposed for extraction of essential oils in which ohmic heating technology is combined with distillation. In this study, different frequencies (25, 50 and 100 Hz) as well as high and low intensity OAHD (220 and 380 V) were applied on aerial parts of Mentha piperita L. and the results were compared with those of the conventional Hydrodistillation (HD). The results showed that high and low intensity OAHD methods had the extraction times of 13.54 and 19.71 min, respectively, while this value was about 1 h for HD. Scanning electron micrographs of mint showed a sudden eruption of essential oil glands for all OAHD samples. GC–MS analysis did not indicate any noticeable changes in the compounds of all extracted essential oils. The results of this study showed that higher applied voltage can speed up OAHD and confirmed this emerging technology as a green technology (considering fossil fuels as the main source of electrical energy). Industrial relevance The quality and quantity of essential oils extracted from herbs and other raw materials are affected by the extraction method. In this research different frequencies (25, 50 and 100 Hz) and also high and low intensity OAHD (220 and 380 V, applicable in industries in many regions) of ohmic-assisted Hydrodistillation (OAHD), as an innovative and emerging technology, were used and compared with traditional Hydrodistillation in extraction of essential oils from the aerial parts of Mentha piperita L. (peppermint). All OAHD treatments were more economical and more environmentally friendly than Hydrodistillation method. In addition, high intensity OAHD method not only can enhance the amount of extracted essential oil but also was the quickest method and consequently can be a valuable industrial alternative for extraction of essential oils.
-
comparison of ohmic assisted Hydrodistillation with traditional Hydrodistillation for the extraction of essential oils from thymus vulgaris l
Innovative Food Science and Emerging Technologies, 2012Co-Authors: Mohsen Gavahian, Katayoun Javidnia, Asgar Farahnaky, Mahsa MajzoobiAbstract:Abstract Ohmic-assisted Hydrodistillation (OAHD) is an advanced Hydrodistillation (HD) technique utilizing ohmic heating process and could be considered as a novel method for the extraction of essential oils. One of the major problems with traditional methods is long extraction time. OAHD of essential oils from the aerial parts of Thymus vulgaris L. (common thyme) was studied and the results were compared with those of the conventional HD. The results showed that OAHD method had the extraction time of 24.75 min while this value was about 1 h for HD. Scanning electron micrographs of thyme leaves showed a sudden eruption of essential oil glands and their surrounding area for OAHD samples. GC–MS analysis did not indicate any noticeable changes in the compounds of the essential oils obtained by OAHD in comparison with HD. Results of this study introduced OAHD as a green technology because of less energy required per ml of essential oil extraction. Industrial relevance The quality and quantity of essential oils extracted from herbs and other raw materials are affected by the extraction method. In this research ohmic-assisted Hydrodistillation (OAHD) was used as an advanced and novel Hydrodistillation (HD) technique and compared with traditional Hydrodistillation in extraction of essential oils from the aerial parts of Thymus vulgaris L. (common thyme). OAHD method was quicker, more economical and environmentally friendly than Hydrodistillation method. The results of this study introduced OAHD as a green technology.
-
ohmic assisted Hydrodistillation of essential oils from zataria multiflora boiss shirazi thyme
International Journal of Food Science and Technology, 2011Co-Authors: Mohsen Gavahian, Katayoun Javidnia, Asgar Farahnaky, Mahsa Majzoobi, Mohammad Jamal Saharkhiz, Gholamreza MesbahiAbstract:Summary Ohmic-assisted Hydrodistillation (OAHD) is a combination of ohmic heating and distillation, and could be considered as a novel method for the extraction of essential oils. Major problems with traditional methods are long extraction time and lower purity of the extract. In this study, OAHD was applied as an economic and green technology for the extraction of essential oils from Zataria multiflora Boiss. (Shirazi thyme) aerial parts and the results were compared to those obtained from Hydrodistillation (HD) as a conventional method. The results showed that OAHD method had the extraction time of 32.21 ± 2.59 min while this value was about 57.21 ± 2.33 min for Hydrodistillation (HD). Scanning electron micrographs of thyme leaves showed a sudden eruption of essential oil glands and their surrounding area for OAHD samples. GC–MS analysis indicated that both methods of OAHD and HD can extract the same compounds.
