This document presents research testing the extraction of eugenol, the main essential oil in clove buds, using two perfluoro organic solvents: Novec 1230 and Novec 7100. Extraction methods included simple maceration and circulation extraction in a Soxhlet apparatus. Analysis using GC-MS and RP-HPLC found that Novec 7100 extracted eugenol most effectively at 73% yield, followed by n-hexane at 81% and Novec 1230 at only 6.9%. Circulation extraction for 2 hours using Novec 7100 achieved the highest yield of 85%. The results demonstrate that higher solvent molecule fluorination results in lower eugenol extraction. Perflu
Rapid UHPLC Determination of Common Preservatives in Cosmetic Products v2zq
Rapid UHPLC Determination of Common Preservatives in Cosmetic Products - Resources for Healthy Children www.scribd.com/doc/254613619 - For more information, Please see Organic Edible Schoolyards & Gardening with Children www.scribd.com/doc/254613963 - Gardening with Volcanic Rock Dust www.scribd.com/doc/254613846 - Double Food Production from your School Garden with Organic Tech www.scribd.com/doc/254613765 - Free School Gardening Art Posters www.scribd.com/doc/254613694 - Increase Food Production with Companion Planting in your School Garden www.scribd.com/doc/254609890 - Healthy Foods Dramatically Improves Student Academic Success www.scribd.com/doc/254613619 - City Chickens for your Organic School Garden www.scribd.com/doc/254613553 - Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica www.scribd.com/doc/254613494 - Simple Square Foot Gardening for Schools - Teacher Guide www.scribd.com/doc/254613410 - Free Organic Gardening Publications www.scribd.com/doc/254609890 ~ perkinelmer.com
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Analysis of Phenolic Antioxidants in Edible Oil/Shortening Using the PerkinEl...PerkinElmer, Inc.
Phenolic antioxidants are commonly used in food to prevent the oxidation of oils. Oxidized oil and fats cause foul odor and rancidity in food products, which is a major cause for concern to the food industry. Globally, regulations vary, but current maximum allowable levels are as low as 100 μg/g (100 ppm). This application note presents a UHPLC method for the analysis of the ten most common phenolic antioxidants that may be found in such products.
Method Development for Visible
Spectrophotometric Analysis of Ibuprofen in Pharmaceuticals
Ibuprofen is a prominent member of the group of non-steroidal anti-inflammatory drugs (NSAIDs), with good anti-inflammatory
action, a very effective analgesic, with increased antipyretic effect. The aim of this research was to exactly quantify pure Ibuprofen content in tablets of a pharmaceutical, by a spectrophotometric analysis method in the Visible range. Ibuprofen was quantitatively converted to a bright orange dye
with a yellowish shade, by a color reaction with alpha-naphthylamine
in the presence of sodium nitrite, in an absolute ethanol medium. Following the analysis, it was found 397.952 milligrams of pure Ibuprofen content / film-coated tablet of the pharmaceutical product. This value was very close to Ibuprofen content declared by the pharmaceutical manufacturer (400 milligrams), with a mean deviation of only 0.512 percent from the officially declared amount of active substance. The value found fits perfectly within the normal limits provided by the European and International Pharmacopoeias standards, taken over by the Romanian Pharmacopoeia, 10th Edition. The spectrophotometric analysis method was then successfully subjected to statistical analysis.
Rapid UHPLC Determination of Common Preservatives in Cosmetic Products v2zq
Rapid UHPLC Determination of Common Preservatives in Cosmetic Products - Resources for Healthy Children www.scribd.com/doc/254613619 - For more information, Please see Organic Edible Schoolyards & Gardening with Children www.scribd.com/doc/254613963 - Gardening with Volcanic Rock Dust www.scribd.com/doc/254613846 - Double Food Production from your School Garden with Organic Tech www.scribd.com/doc/254613765 - Free School Gardening Art Posters www.scribd.com/doc/254613694 - Increase Food Production with Companion Planting in your School Garden www.scribd.com/doc/254609890 - Healthy Foods Dramatically Improves Student Academic Success www.scribd.com/doc/254613619 - City Chickens for your Organic School Garden www.scribd.com/doc/254613553 - Huerto Ecológico, Tecnologías Sostenibles, Agricultura Organica www.scribd.com/doc/254613494 - Simple Square Foot Gardening for Schools - Teacher Guide www.scribd.com/doc/254613410 - Free Organic Gardening Publications www.scribd.com/doc/254609890 ~ perkinelmer.com
ER Publication,
IJETR, IJMCTR,
Journals,
International Journals,
High Impact Journals,
Monthly Journal,
Good quality Journals,
Research,
Research Papers,
Research Article,
Free Journals, Open access Journals,
erpublication.org,
Engineering Journal,
Science Journals,
Analysis of Phenolic Antioxidants in Edible Oil/Shortening Using the PerkinEl...PerkinElmer, Inc.
Phenolic antioxidants are commonly used in food to prevent the oxidation of oils. Oxidized oil and fats cause foul odor and rancidity in food products, which is a major cause for concern to the food industry. Globally, regulations vary, but current maximum allowable levels are as low as 100 μg/g (100 ppm). This application note presents a UHPLC method for the analysis of the ten most common phenolic antioxidants that may be found in such products.
Method Development for Visible
Spectrophotometric Analysis of Ibuprofen in Pharmaceuticals
Ibuprofen is a prominent member of the group of non-steroidal anti-inflammatory drugs (NSAIDs), with good anti-inflammatory
action, a very effective analgesic, with increased antipyretic effect. The aim of this research was to exactly quantify pure Ibuprofen content in tablets of a pharmaceutical, by a spectrophotometric analysis method in the Visible range. Ibuprofen was quantitatively converted to a bright orange dye
with a yellowish shade, by a color reaction with alpha-naphthylamine
in the presence of sodium nitrite, in an absolute ethanol medium. Following the analysis, it was found 397.952 milligrams of pure Ibuprofen content / film-coated tablet of the pharmaceutical product. This value was very close to Ibuprofen content declared by the pharmaceutical manufacturer (400 milligrams), with a mean deviation of only 0.512 percent from the officially declared amount of active substance. The value found fits perfectly within the normal limits provided by the European and International Pharmacopoeias standards, taken over by the Romanian Pharmacopoeia, 10th Edition. The spectrophotometric analysis method was then successfully subjected to statistical analysis.
Chemical Composition and Antifungal Activity of Nigella Sativa L. Oil Seed C...inventionjournals
International Journal of Pharmaceutical Science Invention (IJPSI) is an international journal intended for professionals and researchers in all fields of Pahrmaceutical Science. IJPSI publishes research articles and reviews within the whole field Pharmacy and Pharmaceutical Science, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Process of implementing and developing technical standards based on the consensus of different parties that include firms, users, interest groups, standards organizations and governments
Embedded portable instruments for olive oil quality analysisMarco Grossi
The presentation describes two portable battery operated electronic systems to make measurements of free acidity, peroxide value and total phenol content in olive oil.
If you want to know more about this topic, please read:
[1] Grossi M., Di Lecce G., Gallina Toschi T., Riccò B. (2014). Fast and accurate determination of olive oil acidity by electrochemical impedance spectroscopy. IEEE Sensors Journal, 14 (9), 2947-2954.
http://dx.doi.org/10.1109/JSEN.2014.2321323
[2] Grossi M., Di Lecce G., Gallina Toschi T., Riccò B. (2014). A novel electrochemical method for olive oil acidity determination. Microelectronics Journal, 45, 1701-1707. http://dx.doi.org/10.1016/j.mejo.2014.07.006
[3] Grossi M., Di Lecce G., Arru, M., Gallina Toschi T., Riccò B. (2015). An opto-electronic system for in-situ determination of peroxide value and total phenol content in olive oil. Journal of Food Engineering, 146, 1-7.
http://dx.doi.org/10.1016/j.jfoodeng.2014.08.015
Purpose: Quantitative analysis of steroidal saponin „Diosgenin‟ from methanol extract of Moringa oleifera Lam (Drumstick) by HPTLC technique.
Approach: The approach of the study was to find out the presence of Diosgenin from Moringa and then its quantity.
Method: HPTLC analysis was performed with methonolic extract of seeds. Standard Diosgenin curve was used to detect the availability of the steroidal saponin Diosgenin.
Results: 20 μL of sample was applied which showed 159.4084 ng of Diosgenin. About 0.797 % w/v of Diosgenin was estimated form seeds of Moringa in methonolic extract. It was compared with the standard Diosgenin curve.
Conclusions: Moringa oleifera Lam seeds are the source of steroidal saponin- Diosgenin which can be used as female contraceptive to control human population.
Development and Validation of Reversed Phase-High-Performance Liquid Chromato...BRNSS Publication Hub
A simple, accurate, precise, and robust in vitro methods developed and validated for measurement of drug release in Aminocaproic Acid tablets. High-performance liquid chromatography (HPLC) method for quantification of drug in dissolution samples of Aminocaproic Acid tablet is developed and validated. 0.1 N Hydrochloric acid is used as dissolution medium and Basket (USP-I) as apparatus at 100 rpm. The sample was withdrawn after 60 min. The developed HPLC method was used for quantitative estimation of drug release in dissolution samples of Aminocaproic Acid tablet. Chromatogram was run through Inertsil ODS 3V, (250 × 4.6 mm), 5 μm. Mobile phase containing buffer solution and methanol in the pumped through column at a flow rate of 1 ml/min. Buffer used in this method was 13.3 g sodium dihydrogen phosphate monohydrate, 500 mg of Heptane-1-sulfonic acid sodium salt, and 1.0 mL of Triethylamine buffer with pH 2.20 adjusted by orthophosphoric acid. Optimized wavelength for Aminocaproic acid was 210 nm. Retention time of Aminocaproic acid was found about 4.0 min; linearity range was 132.605 μg/ml–828.787 μg/ml. The new method was evaluated according to ICH guideline and as far as validation results are concern correlation coefficient value was 0.9999 for the very compound, percentage recovery 100.0%, repeatability results relative standard deviation 0.9 for Aminocaproic acid. The developed HPLC method was found to be a simple and rapid one for regular analysis in professional laboratory.
Chemical fingerprint of Centella Asiatica’s bioactive compounds in the ethanol...Mohd Shukri Mat Nor
Abstract
Centella asiatica is a herbal plant that is widely used as medicine due to the benefit of its bioactive compounds such as rutin, kaempferol, quercetin, gallic acid, luteolin and cate-chin. Typically, the amount of these bioactive compounds are varies depending on the solvent used. Therefore, this study aims to investigate the chemical fingerprint of six Centella asiatica’s bioactive compounds (kaempferol, quercetin, luteolin, gallic acid, rutin and catechin) in the ethanolic and aqueous ethanol extracts. Water, ethanol, and 50% aqueous ethanol were used as extracting solvents via maceration (solid-liquid) technique to extract bioactive compounds from C.asiatica. Rotary evaporator procedure was performed to concentrate the extracts before these crudes were analysed using HPLC instrument. The percentage yield of crude extract (% w/w) was calculated, and its mathematical model was reported in this study. The exponential equation model was also applied to predict the percentage yield of the C.asiatica extract. From the equation, satisfactory results have been obtained, which gave less than 12.21% error with 0.9967 of R2 value. Besides, the percentage yield of bioactive compounds resulting from HPLC analysis was also explained. HPLC result showed that kaempferol was the highest bioactive compound with 373.2 mg/g dry powder using 100% ethanol as extract solvent. Therefore, the development of this study can be extended to assess this plant potential in the formulation of pharmaceutical and cosmetic products.
PREPARATION AND IN-VITRO EVALUATION OF ITRACONAZOLE LOADED NANOSPONGES FOR T...Mahewash Sana Pathan
Itraconazole is an imidazole derivative and used for the treatment of local and systemic fungal infections. It is a BCS Class II drug having very low solubility in water i.e. 1-4ng/ml. The oral use of Itraconazole is not much recommended as it has many side effects. The present research has been undertaken with the aim to develop a topical hydrogel formulation of Itraconazole loaded nanosponges to increase the solubility, permeability and stability of itraconazole. Itraconazole loaded nanosponge was prepared by emulsion solvent diffusion method by using different concentrations of ethyl cellulose as a polymer, Polyvinyl alcohol as surfactant and dichloromethane as cross linking agent. Physical characteristics of the nanosponges as well as the drug entrapment efficiency, percentage drug content, Percent yield, drug polymer compatibility, solubility studies of the nanosponges were investigated. Particle size analysis and surface morphology of nanosponges were performed. The scanning electron microscopy of nanosponges showed that they were spherical in shape and spongy in nature. Drug entrapment efficiency was found to be in the range of 42.75 % to 73.10 %. The optimized nanosponge formulation was loaded into hydrogel using carbopol 940 and studied for pH, viscosity, in vitro drug release. Of the nanosponge formulations prepared, F4 was found to show drug release of 70.62%. It was concluded that Itraconazole nanosponge hydrogel may have increased solubility and drug release
Blade servers are efficient solutions for data centres requiring flexible, high density deployment and management of high performance servers. Blade servers can pack more server performance into less space while reducing cost and complexity, simplifying deployment and management, and improving overall data centre performance.
Chemical Composition and Antifungal Activity of Nigella Sativa L. Oil Seed C...inventionjournals
International Journal of Pharmaceutical Science Invention (IJPSI) is an international journal intended for professionals and researchers in all fields of Pahrmaceutical Science. IJPSI publishes research articles and reviews within the whole field Pharmacy and Pharmaceutical Science, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Process of implementing and developing technical standards based on the consensus of different parties that include firms, users, interest groups, standards organizations and governments
Embedded portable instruments for olive oil quality analysisMarco Grossi
The presentation describes two portable battery operated electronic systems to make measurements of free acidity, peroxide value and total phenol content in olive oil.
If you want to know more about this topic, please read:
[1] Grossi M., Di Lecce G., Gallina Toschi T., Riccò B. (2014). Fast and accurate determination of olive oil acidity by electrochemical impedance spectroscopy. IEEE Sensors Journal, 14 (9), 2947-2954.
http://dx.doi.org/10.1109/JSEN.2014.2321323
[2] Grossi M., Di Lecce G., Gallina Toschi T., Riccò B. (2014). A novel electrochemical method for olive oil acidity determination. Microelectronics Journal, 45, 1701-1707. http://dx.doi.org/10.1016/j.mejo.2014.07.006
[3] Grossi M., Di Lecce G., Arru, M., Gallina Toschi T., Riccò B. (2015). An opto-electronic system for in-situ determination of peroxide value and total phenol content in olive oil. Journal of Food Engineering, 146, 1-7.
http://dx.doi.org/10.1016/j.jfoodeng.2014.08.015
Purpose: Quantitative analysis of steroidal saponin „Diosgenin‟ from methanol extract of Moringa oleifera Lam (Drumstick) by HPTLC technique.
Approach: The approach of the study was to find out the presence of Diosgenin from Moringa and then its quantity.
Method: HPTLC analysis was performed with methonolic extract of seeds. Standard Diosgenin curve was used to detect the availability of the steroidal saponin Diosgenin.
Results: 20 μL of sample was applied which showed 159.4084 ng of Diosgenin. About 0.797 % w/v of Diosgenin was estimated form seeds of Moringa in methonolic extract. It was compared with the standard Diosgenin curve.
Conclusions: Moringa oleifera Lam seeds are the source of steroidal saponin- Diosgenin which can be used as female contraceptive to control human population.
Development and Validation of Reversed Phase-High-Performance Liquid Chromato...BRNSS Publication Hub
A simple, accurate, precise, and robust in vitro methods developed and validated for measurement of drug release in Aminocaproic Acid tablets. High-performance liquid chromatography (HPLC) method for quantification of drug in dissolution samples of Aminocaproic Acid tablet is developed and validated. 0.1 N Hydrochloric acid is used as dissolution medium and Basket (USP-I) as apparatus at 100 rpm. The sample was withdrawn after 60 min. The developed HPLC method was used for quantitative estimation of drug release in dissolution samples of Aminocaproic Acid tablet. Chromatogram was run through Inertsil ODS 3V, (250 × 4.6 mm), 5 μm. Mobile phase containing buffer solution and methanol in the pumped through column at a flow rate of 1 ml/min. Buffer used in this method was 13.3 g sodium dihydrogen phosphate monohydrate, 500 mg of Heptane-1-sulfonic acid sodium salt, and 1.0 mL of Triethylamine buffer with pH 2.20 adjusted by orthophosphoric acid. Optimized wavelength for Aminocaproic acid was 210 nm. Retention time of Aminocaproic acid was found about 4.0 min; linearity range was 132.605 μg/ml–828.787 μg/ml. The new method was evaluated according to ICH guideline and as far as validation results are concern correlation coefficient value was 0.9999 for the very compound, percentage recovery 100.0%, repeatability results relative standard deviation 0.9 for Aminocaproic acid. The developed HPLC method was found to be a simple and rapid one for regular analysis in professional laboratory.
Chemical fingerprint of Centella Asiatica’s bioactive compounds in the ethanol...Mohd Shukri Mat Nor
Abstract
Centella asiatica is a herbal plant that is widely used as medicine due to the benefit of its bioactive compounds such as rutin, kaempferol, quercetin, gallic acid, luteolin and cate-chin. Typically, the amount of these bioactive compounds are varies depending on the solvent used. Therefore, this study aims to investigate the chemical fingerprint of six Centella asiatica’s bioactive compounds (kaempferol, quercetin, luteolin, gallic acid, rutin and catechin) in the ethanolic and aqueous ethanol extracts. Water, ethanol, and 50% aqueous ethanol were used as extracting solvents via maceration (solid-liquid) technique to extract bioactive compounds from C.asiatica. Rotary evaporator procedure was performed to concentrate the extracts before these crudes were analysed using HPLC instrument. The percentage yield of crude extract (% w/w) was calculated, and its mathematical model was reported in this study. The exponential equation model was also applied to predict the percentage yield of the C.asiatica extract. From the equation, satisfactory results have been obtained, which gave less than 12.21% error with 0.9967 of R2 value. Besides, the percentage yield of bioactive compounds resulting from HPLC analysis was also explained. HPLC result showed that kaempferol was the highest bioactive compound with 373.2 mg/g dry powder using 100% ethanol as extract solvent. Therefore, the development of this study can be extended to assess this plant potential in the formulation of pharmaceutical and cosmetic products.
PREPARATION AND IN-VITRO EVALUATION OF ITRACONAZOLE LOADED NANOSPONGES FOR T...Mahewash Sana Pathan
Itraconazole is an imidazole derivative and used for the treatment of local and systemic fungal infections. It is a BCS Class II drug having very low solubility in water i.e. 1-4ng/ml. The oral use of Itraconazole is not much recommended as it has many side effects. The present research has been undertaken with the aim to develop a topical hydrogel formulation of Itraconazole loaded nanosponges to increase the solubility, permeability and stability of itraconazole. Itraconazole loaded nanosponge was prepared by emulsion solvent diffusion method by using different concentrations of ethyl cellulose as a polymer, Polyvinyl alcohol as surfactant and dichloromethane as cross linking agent. Physical characteristics of the nanosponges as well as the drug entrapment efficiency, percentage drug content, Percent yield, drug polymer compatibility, solubility studies of the nanosponges were investigated. Particle size analysis and surface morphology of nanosponges were performed. The scanning electron microscopy of nanosponges showed that they were spherical in shape and spongy in nature. Drug entrapment efficiency was found to be in the range of 42.75 % to 73.10 %. The optimized nanosponge formulation was loaded into hydrogel using carbopol 940 and studied for pH, viscosity, in vitro drug release. Of the nanosponge formulations prepared, F4 was found to show drug release of 70.62%. It was concluded that Itraconazole nanosponge hydrogel may have increased solubility and drug release
Blade servers are efficient solutions for data centres requiring flexible, high density deployment and management of high performance servers. Blade servers can pack more server performance into less space while reducing cost and complexity, simplifying deployment and management, and improving overall data centre performance.
Bubble CPAP is a non-invasive ventilation strategy for newborns with infant respiratory distress syndrome (IRDS). It is one of the methods by which continuous positive airway pressure (CPAP) is delivered to a spontaneously breathing newborn to maintain lung volumes during expiration.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
2. Cloves are the aromatic flower buds of a tree in the
family Myrtaceae, Syzygium aromaticum.
Clove buds are useful plant raw material in medicinal, perfume, food
and liquor industries.
Major constituents of clove buds are essential oil ≈20%, galotanins,
flavonoids, phytosterols, microelements etc.
Biologically active substances from clove buds have different useful
pharmacological activities such as analgesic, anti-inflammatory,
anti-microbial, antifungal properties.
3. To test a hypothesis about the possibility of extraction of main
essential oil substances from clove buds with two different types of
perfluoro organic solvents:
Novec 1230 (С6F12O)
(Higher degree of molecule
fluorination)
Novec 7100 (C4F9OСH3 )
(Comparative lower degree
of molecule fluorination)
4. Plant raw material : Milled clove buds sample with the particle
size ranging from 0.1 to 0.5 mm.
Chemicals : Novec 1230, Novec 7100 and n-hexane as solvents.
Eugenol Sigma-Aldrich ≥ 99.0% as reference substance.
Methods of extraction : Simple maceration at 24 ± 1°С for 24 hr
and the extract was decanted and centrifuged at 3,000 rpm for 10
min.
5. Circulation method of extraction : Soxhlet extraction carried
out for specified time period (i.e. 5 hrs).
6. Gas Chromatography Mass spectroscopy (GC-MS) :
Qualitative analysis of extracts was carried out by GC-MS using
equipment GCMS-QP2010 (Injection volume = 1 μL).
Reversed Phase High Performance Liquid Chromatography
: Quantitative analysis of extracts was carried out by
RP-HPLC using equipment Agilent 1200.
7. The results of eugenol yield into n-hexane and per-fluoro organic
solvents Novec 1230 and Novec 7100 are presented in Figure 1.
Novec 1230 : 6.9 ± 0.4%
Novec 7100 : 73 ± 4%
n-hexane : 81 ± 4%
8. Moreover, the optimum yield of eugenol from the circulation method
for the extraction was:
Novec 7100 : 85 ± 4% after 2 hrs
Novec 1230 : 54 ± 3% after 4 hrs
9. These results demonstrated that the yield of eugenol depended
significantly on the degree of solvent molecule fluorination,
the more fluorination the less eugenol yield.
Eugenol :
10. As observed from aforementioned results, using per-fluoro organic
solvents is a new and very promising technology :
Relatively simple in use
Cost efficient
Comparable to the technologies that use liquefied gases and
supercritical carbon dioxide in terms of their yield.
However, further research is needed to study the extraction
properties of these solvents and determine their limits.