Microwave assisted extraction as an important technology for valorising orange waste

2014 ◽  
Vol 38 (6) ◽  
pp. 2278-2283 ◽  
Author(s):  
Thomas M. Attard ◽  
Baillie Watterson ◽  
Vitaliy L. Budarin ◽  
James H. Clark ◽  
Andrew J. Hunt
Keyword(s):  
Fold Increase ◽  
Microwave Assisted Extraction ◽  
Two Stage ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Orange Waste ◽  
Stage Process ◽  
Conventional Extraction ◽  
Kinetics Of

Kinetics of microwave-assisted d-limonene extraction demonstrates a five-fold increase in yield over conventional extraction in a two stage process.

Microwave-Assisted Extraction of Chlorophyll from Filter Mud of Sugercane Mill and Component Analysis

2012 ◽  
Vol 518-523 ◽  
pp. 430-435 ◽  
Author(s):  
Hai Rong Guo ◽  
Shao Ying Ma ◽  
Xiao Fei Wang ◽  
Er Fang Ren ◽  
Yuan Yuan Li
Keyword(s):  
Irradiation Time ◽  
Extraction Time ◽  
Extraction Temperature ◽  
Microwave Assisted Extraction ◽  
Optimal Conditions ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Extraction ◽  
Filter Mud ◽  
Strong Absorption Peak

Microwave-assisted extraction (MAE) was used to extract chlorophylls from filter mud. Ethanol was used as the solvent. The optimal conditions for the MAE of chlorophylls were concluded from the study as the irradiation time, 50 s, the ratio of liquid to solid, 8:1 (mL/g), the extraction temperature, 40 °C, and the extraction time, 60 min. Compared with conventional extraction, the MAE of chlorophylls from the filter mud was more effective. The extraction time for MAE was 60 min with 0.277 mg/g chlorophyll yield, while conventional extraction needed 240 min with only about 0.259 mg/g chlorophyll yield. The Ultraviolet Absorption Spectra of the extracted chlorophylls showed that there was a strong absorption peak at about 663 nm. C=N, Mg-N and C-N was not seen existed from the infrared spectroscopy probably because that the mixed extracts were not purified and the chlorophyll content was less.

scholarly journals Microwave-Assisted Extraction of Phlorotannins from Fucus vesiculosus

Marine Drugs ◽  
2020 ◽  
Vol 18 (11) ◽  
pp. 559
Author(s):  
Sónia J. Amarante ◽  
Marcelo D. Catarino ◽  
Catarina Marçal ◽  
Artur M. S. Silva ◽  
Rita Ferreira ◽  
...  
Keyword(s):  
Xanthine Oxidase ◽  
Conventional Method ◽  
Ethanol Concentration ◽  
Fucus Vesiculosus ◽  
Metabolic Enzyme ◽  
Microwave Assisted Extraction ◽  
Pharmaceutical Drug ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Extraction

Microwave-assisted extraction (MAE) was carried out to maximize the extraction of phlorotannins from Fucus vesiculosus using a hydroethanolic mixture as a solvent, as an alternative to the conventional method with a hydroacetonic mixture. Optimal MAE conditions were set as ethanol concentration of 57% (v/v), temperature of 75 °C, and time of 5 min, which allowed a similar recovery of phlorotannins from the macroalgae compared to the conventional extraction. While the phlorotannins richness of the conventional extract was slightly superior to that of MAE (11.1 ± 1.3 vs. 9.8 ± 1.8 mg PGE/g DWextract), both extracts presented identical phlorotannins constituents, which included, among others, tetrafucol, pentafucol, hexafucol, and heptafucol structures. In addition, MAE showed a moderate capacity to scavenge ABTS•+ (IC50 of 96.0 ± 3.4 µg/mL) and to inhibit the activity of xanthine oxidase (IC50 of 23.1 ± 3.4 µg/mL) and a superior ability to control the activity of the key metabolic enzyme α-glucosidase compared to the pharmaceutical drug acarbose.

scholarly journals Kinetics of soursop leaves antioxidant extraction using microwave-assisted extraction

2020 ◽  
Vol 572 ◽  
pp. 012041
Author(s):  
Megawati ◽  
D S Fardhyanti ◽  
D Widjanarko ◽  
Hanifah ◽  
G M Bungsu ◽  
...  
Keyword(s):  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Kinetics Of

scholarly journals Isothermal green microwave-assisted extraction of caffeine from guarana: a kinetic study

2017 ◽  
Vol 6 (6) ◽  
Author(s):  
Biljana Koturevic ◽  
Borivoj Adnadjevic ◽  
Jelena Jovanovic
Keyword(s):  
Microwave Heating ◽  
Model Fitting ◽  
Water Extract ◽  
Isoconversional Method ◽  
Microwave Assisted Extraction ◽  
Exponential Factor ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Caffeine Extraction ◽  
Kinetics Of

AbstractThe kinetics of isothermal green microwave-assisted extraction of caffeine from guarana seed powder with water at a temperature range from 40°C to 60°C was investigated. The caffeine concentration in the water extract was determined by UV-Vis spectrophotometry. By applying the isoconversional method, it was established that the kinetics of the caffeine extraction from the guarana seed powder with microwave heating is an elementary kinetic process. The model fitting method was used to determine the kinetic model of the caffeine extraction under microwave heating. It was found that the kinetics of the caffeine extraction can, under microwave heating, be modeled by the Jander’s model of three dimensional diffusion. The kinetic parameters, activation energy and pre-exponential factor of the caffeine extraction were determined.

scholarly journals Kinetic Study on Chlorophyll and Antioxidant Activity from Polyscias fruticosa (L.) Harms Leaves via Microwave-Assisted Extraction

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3761
Author(s):  
Thi-Thuy-Dung Nguyen ◽  
Quoc-Duy Nguyen ◽  
Thi-Van-Linh Nguyen
Keyword(s):  
Antioxidant Activity ◽  
Microwave Power ◽  
Order Kinetic ◽  
Microwave Assisted Extraction ◽  
Total Polyphenols ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Order Kinetic Model ◽  
High Antioxidant Activity ◽  
Kinetics Of

Polyscias fruticosa (L.) leaves contain significant bioactive compounds with high antioxidant activity such as chlorophylls, total polyphenols, etc. but these have still been underutilized. In this study, the kinetics of chlorophyll and antioxidant activity extraction from P. fruticosa leaves by microwave-assisted extraction (MAE) were investigated. Microwave power was 300, 450, or 600 (W); the ratio of material/solvent varied from 1:40 to 1:80 (g/mL). In this study, the second-order kinetic model successfully predicted the change of chlorophyll and antioxidant activity during MAE. The increase of microwave power or/and the solvent amount increased saturated extraction efficiency and the extraction rate constant. However, the saturated concentration of chlorophyll and antioxidant activity increased with the increment of microwave power and the decrease in solvent amount.

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