scholarly journals Deep eutectic solvent for the synthesis of (E)- Nitroalkene via microwave assisted Henry reaction

2021 ◽  
pp. 100187
Author(s):  
M. Shaibuna ◽  
K. Hiba ◽  
K. Sreekumar
Keyword(s):  
Deep Eutectic Solvent ◽  
Henry Reaction ◽  
Microwave Assisted

scholarly journals Deep Eutectic Solvent-Based Microwave-Assisted Extraction of Baicalin from Scutellaria baicalensis Georgi

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Hui Wang ◽  
Xiaodi Ma ◽  
Qibin Cheng ◽  
Xiaoli Xi ◽  
Liwei Zhang
Keyword(s):  
Maximum Yield ◽  
Deep Eutectic Solvent ◽  
Extraction Yield ◽  
Scutellaria Baicalensis ◽  
Molar Ratio ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Scutellaria Baicalensis Georgi ◽  
Microwave Assisted ◽  
Assisted Extraction

Deep eutectic solvents (DESs) have attracted significant attention as green media for the extraction and separation of natural compounds from Chinese medicine. In this study, a hydrophobic DESs-based microwave-assisted extraction (MAE) was successfully used to efficiently extract baicalin from Scutellaria baicalensis Georgi. Firstly, DecA: N4444-Cl (DES-1 , molar ratio 1 : 2) was screened and selected as the most appropriate DES by comparing the extraction yield in different hydrophobic DESs. Based on the extraction yield of baicalin, response surface methodology (RSM) was employed to model and optimize the parameters (extraction temperature, liquid-solid ratio, and extraction time). Furthermore, the maximum yield of 106.96 mg·g−1 was achieved under optimum conditions in DES-containing aqueous solutions (33 vol% water content), which reached a similar level that was conducted using the pharmacopoeia procedure (104.94 mg·g−1). These results indicated that the proposed method is an excellent alternative for the extraction of baicalin.

scholarly journals Combining acid-based deep eutectic solvents and microwave irradiation for improved chestnut shell waste valorization

2021 ◽  
Author(s):  
José González-Rivera ◽  
Angelica Mero ◽  
Elena Husanu ◽  
Andrea Mezzetta ◽  
Carlo Ferrari ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Waste Valorization ◽  
Simultaneous Extraction ◽  
Microwave Assisted ◽  
Chestnut Shell ◽  
Shell Waste ◽  
Key Features

Key features of the deep eutectic solvent-microwave assisted simultaneous extraction of polyphenols and delignification pretreatment of chestnut shell waste are presented.

scholarly journals Liquid Phase and Microwave-Assisted Extractions for Multicomponent Phenolic Pattern Determination of Five Romanian Galium Species Coupled with Bioassays

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1226 ◽  
Author(s):  
Andrei Mocan ◽  
Alina Diuzheva ◽  
Sabin Bădărău ◽  
Cadmiel Moldovan ◽  
Vasil Andruch ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Iridoid Glycosides ◽  
Deep Eutectic Solvent ◽  
Inhibitory Effect ◽  
Total Phenolic ◽  
Extraction Solvent ◽  
Microwave Assisted ◽  
Pattern Determination ◽  
Natural Deep Eutectic Solvent

Background: Galium is a plant rich in iridoid glycosides, flavonoids, anthraquinones, and small amounts of essential oils and vitamin C. Recent works showed the antibacterial, antifungal, antiparasitic, and antioxidant activity of this plant genus. Methods: For the determination of the multicomponent phenolic pattern, liquid phase microextraction procedures were applied, combined with HPLC-PDA instrument configuration in five Galium species aerial parts (G. verum, G. album, G. rivale, G. pseudoaristatum, and G. purpureum). Dispersive Liquid–Liquid MicroExtraction (DLLME) with NaCl and NAtural Deep Eutectic Solvent (NADES) medium and Ultrasound-Assisted (UA)-DLLME with β-cyclodextrin medium were optimized. Results: The optimal DLLME conditions were found to be: 10 mg of the sample, 10% NaCl, 15% NADES or 1% β-cyclodextrin as extraction solvent—400 μL of ethyl acetate as dispersive solvent—300 μL of ethanol, vortex time—30 s, extraction time—1 min, centrifugation at 12000× g for 5 min. Conclusions: These results were compared with microwave-assisted extraction procedures. G. purpureum and G. verum extracts showed the highest total phenolic and flavonoid content, respectively. The most potent extract in terms of antioxidant capacity was obtained from G. purpureum, whereas the extract obtained from G. album exhibited the strongest inhibitory effect against tyrosinase.

Ferrofluid-based dispersive liquid–liquid microextraction using a deep eutectic solvent as a support: applications in the analysis of polycyclic aromatic hydrocarbons in grilled meats

2020 ◽  
Vol 12 (11) ◽  
pp. 1522-1531 ◽  
Author(s):  
Abolghasem Jouyban ◽  
Mir Ali Farajzadeh ◽  
Mohammad Reza Afshar Mogaddam ◽  
Mahboob Nemati ◽  
Ali Akbar Alizadeh Nabil
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Deep Eutectic Solvent ◽  
Microwave Assisted ◽  
Ultrasonic Assisted ◽  
Polycyclic Aromatic ◽  
Dispersive Liquid Liquid Microextraction ◽  
Meat Samples ◽  
Counter Current ◽  
Liquid Microextraction

An ultrasonic-assisted ferrofluid-based dispersive liquid–liquid microextraction procedure combined with microwave-assisted counter current extraction has been used for the extraction of sixteen polycyclic aromatic hydrocarbons from grilled meat samples.

Metal–Organic Frameworks with Pyridyl-Based Isophthalic Acid and Their Catalytic Applications in Microwave Assisted Peroxidative Oxidation of Alcohols and Henry Reaction

2016 ◽  
Vol 16 (4) ◽  
pp. 1837-1849 ◽  
Author(s):  
Anirban Karmakar ◽  
Luísa M. D. R. S. Martins ◽  
Susanta Hazra ◽  
M. Fátima C. Guedes da Silva ◽  
Armando J. L. Pombeiro
Keyword(s):  
Metal Organic Frameworks ◽  
Isophthalic Acid ◽  
Henry Reaction ◽  
Microwave Assisted ◽  
Oxidation Of Alcohols ◽  
Metal Organic ◽  
Catalytic Applications

Microwave-assisted extraction for recovery of polyphenolic antioxidants from ripe mango (Mangifera indica L.) peel using lactic acid/sodium acetate deep eutectic mixtures

2019 ◽  
Vol 26 (1) ◽  
pp. 78-92 ◽  
Author(s):  
Chandra Bhushan T Pal ◽  
Girirajsinh C Jadeja
Keyword(s):  
Lactic Acid ◽  
Sodium Acetate ◽  
Mangifera Indica ◽  
Deep Eutectic Solvent ◽  
Total Phenolic ◽  
Microwave Assisted Extraction ◽  
Solid Ratio ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Mango Peel

The present study investigates recovery of polyphenolic compounds from ripe mango ( Mangifera indica L.) peel using deep eutectic solvents based on microwave-assisted extraction method. Lactic acid/sodium acetate/water (3:1:4) screened out from eight different types of deep eutectic solvent systems was used as extractant. A Box–Behnken design along with response surface methodology was applied to optimize the effect of microwave power (W), time (min), and liquid-to-solid ratio (mL g−1) on polyphenol extraction. The optimized conditions determined were power of 436.45 W, time of 19.66 min, and liquid-to-solid ratio of 59.82 mL g−1. Under the optimal conditions, the recovery of total phenolic content, ferric reducing antioxidant power, and 2,2-diphenyl-1-picrylhydrazyl scavenging activity was 56.17 mg gallic acid equivalent g−1 dw, 683.27 µmol ascorbic acid equivalent g−1 dw, and 82.64 DPPHsc%, respectively. High Performance Liquid Chromatography (HPLC) analysis revealed mangiferin as the prominent phenolic compound in the mango peel extracts. Microwave-assisted deep eutectic solvent extraction showed remarkable effects on the extraction efficiency of phenolic compounds as revealed from scanning electron microscopy analysis. Rancimat test results revealed that the oxidative stability almost doubled upon addition of purified mango peel extracts to the sunflower oil and thus paving way for the use of mango peel waste as a potential source of antioxidants.

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