Optimization of ethanol modified supercritical carbon dioxide on the extract yield and antioxidant activity from Biebersteinia multifida DC

Kamali, Hossein; Golmakani, Ebrahim; Golshan, Alireza; Mohammadi, Ameneh; Sani, T. Ahmadzadeh

doi:10.1016/j.supflu.2014.04.004

Cited by 20 publications

(4 citation statements)

References 18 publications

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“…Zekovic et al (2009) analyzed laurel leaves (Laurus nobilis) by supercritical CO 2 extraction and obtained phytol only under the extraction condition of 40°C and 250 bar. Kamali et al (2014) extracted phytol from Biebersteinia multifida by supercritical CO 2 under the condition of 60°C and 270 bar, where the maximum antioxidant activity occurred.…”

Section: Discussionmentioning

confidence: 99%

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Jorge¹,

Meniqueti²,

Silva³

et al. 2017

Genet. Mol. Res.

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ABSTRACT. In this study, the temperature and pressure of supercritical CO 2 extraction were evaluated to obtain oleoresin of Brunfelsia uniflora leaves and flowers. The oleoresin compounds were identified by gas chromatography-mass spectrometry. The antioxidant activity was evaluated by three different methods. The highest oleoresin yields were 3.32% at 40°C and 200 bar for the leaves, and 1.03% at 60°C and 200 bar for the flowers. The main extracted compounds from leaves were phytol varying from 11.95 to 36.42% and α-tocopherol from 15.53 to 43.10%, and from flowers were geranyl linalool from 11.05 to 21.42% and α-amyrin from 9.66 to 22.12%. Oleoresin obtained at 60°C and 150 bar from leaves presented high antioxidant activity by DPPH (IC 50 1.90 mg/mL) and by FRAP (1.8 µmol Fe 2+ /mg). β-carotene/linoleic acid co-oxidation oleoresin from leaves at 0.25 mg/mL presented higher antioxidant activity than Trolox. The total phenolic content of the oleoresin from leaves ranged from 66.20 to 83.33 µg/mg and from flowers it was just up to 12.46 µg/mg. The extraction conditions affected yield, chemical composition, and antioxidant activity of oleoresin from leaves and flowers. This is the first report on the antioxidant activity of B. uniflora oleoresin from leaves and flowers and provides subsidies for potential applications in chemical, pharmaceutical, and food industries.

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Section: Discussionmentioning

confidence: 99%

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Jorge¹,

Meniqueti²,

Silva³

et al. 2017

Genet. Mol. Res.

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“…On the basis of ANOVA and 95% con dence intervals, the effects of these models were obtained to be statistically signi cant (p-value < 0.05). It should be noticed that even though p-value > 0.05 (supplementary Table s1) for the linear terms but owing to Hierarchy rule in which the p-value < 0.05 for the higher order (interaction or quadratic) of this variable 29,30 . The results of p-value indicted that the total independent parameters have strong effect on the ber diameters.…”

Section: Correlation Between Process Parameters and Ber Diametermentioning

confidence: 97%

Characterization of PVPK90 core shell nanofibers containing curcumin prepared by emulsion electrospinning process

Kamali

Farzadnia

Movaffagh

et al. 2021

Preprint

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The pharmacological effects of curcumin (CUR) as a polyphenolic ingredient of turmeric affected by its water insolubility, poor bioavailability, and instability. The electrospun nanofibers of hydrophilic biodegradable polymer can be addressed this issue. The current study aimed to investigate the CUR-loaded core-shell PVPK90 nanofibers generated from O/W nanoemulsions. CUR-loaded PVPK90 fibers were prepared based on the central composite design and different levels of drug concentration, flow rate, amount of acetone, and organic phase percentage by electrospinning technique and their diameter and uniformity, tensile strength, wetting and disintegration time were evaluated. Then, DSC, FTIR, XRD, TEM, fluorescence microscopy, and drug release test were carried out on the optimized nanofibers. The formulation containing 6 mg/mL CUR, 30% organic phase, 0.4 mL acetone, and flow rate of 1 mL/h was selected as optimum formulation. The results were confirmed the core-shell bead-free uniform fibers at the nanometer scale. The optimum nanofiber showed a good flexibility, short wetting and disintegrating times as well as the amorphous structure. The drug release pattern indicated the rapid release of the drug within 30 min. Our findings confirm that the O/W emulsion electrospinning-based PVPK90 core-shell nanofiber would be beneficial as a novel delivery system for water insoluble drug.

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“…4,5 Meanwhile, CO 2 also has widespread applications in many industrial fields, such as enhanced oil recovery, 6 microelectronics cleaning, 7 and industrial extraction. 8 Capturing CO 2 from N 2 , on one hand, could reduce the amount of CO 2 in the atmosphere and on the other hand could realize the recycle of CO 2 . Therefore, many efforts have been devoted to developing various strategies to separate CO 2 /N 2 .…”

Section: ■ Introductionmentioning

confidence: 99%

“…In the past decades, the increasing emission of CO 2 has aroused serious environmental problems, − especially the greenhouse effect. , Meanwhile, CO 2 also has widespread applications in many industrial fields, such as enhanced oil recovery, microelectronics cleaning, and industrial extraction . Capturing CO 2 from N 2 , on one hand, could reduce the amount of CO 2 in the atmosphere and on the other hand could realize the recycle of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of CO₂/N₂ Separation through Two-Dimensional Graphene Oxide Membranes

et al. 2016

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Graphene oxide (GO), as an ultrathin, high-flux, and energy-efficient separation membrane, has shown great potential for CO2 capture. In this study, using molecular dynamics simulations, the separation of CO2 and N2 through the interlayer gallery of GO membranes was studied. The preferential adsorption of CO2 in the GO channel derived from their strong interaction is responsible for the selectivity of CO2 over N2. Furthermore, the influences of interlayer spacing, oxidization degree, and channel length on the separation of CO2/N2 were investigated. Our studies unveil the underlying mechanism of CO2/N2 separation in the interlayer GO channel, and the results may be helpful in guiding rational design of GO membranes for gas separation.

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Optimization of ethanol modified supercritical carbon dioxide on the extract yield and antioxidant activity from Biebersteinia multifida DC

Cited by 20 publications

References 18 publications

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Characterization of PVPK90 core shell nanofibers containing curcumin prepared by emulsion electrospinning process

Molecular Dynamics Simulations of CO₂/N₂ Separation through Two-Dimensional Graphene Oxide Membranes

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Optimization of ethanol modified supercritical carbon dioxide on the extract yield and antioxidant activity from Biebersteinia multifida DC

Cited by 20 publications

References 18 publications

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Research Article Antioxidant activity and chemical composition of oleoresin from leaves and flowers of Brunfelsia uniflora.

Characterization of PVPK90 core shell nanofibers containing curcumin prepared by emulsion electrospinning process

Molecular Dynamics Simulations of CO2/N2 Separation through Two-Dimensional Graphene Oxide Membranes

Contact Info

Product

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About

Molecular Dynamics Simulations of CO₂/N₂ Separation through Two-Dimensional Graphene Oxide Membranes