Extraction of phenolic compounds from melissa using microwave and ultrasound

Date

2013-01-01

Author

INCE, Alev Emine
Şahin, Serpil
Şümnü, Servet Gülüm

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

187
views

0
downloads

In this study, extraction of phenolic compounds from melissa by microwave and ultrasound was studied. In both the microwave and ultrasound extractions, the effects of extraction time (5-20 min for microwave; 5-30 min for ultrasound) and solid-to-solvent ratio (1:10, 1:20, and 1:30 g mL(-1)) on total phenolic content (TPC) were investigated. Effects of different powers (50% and 80%) were also studied for the ultrasound extraction. As a solvent, water was used. In microwave extractions, the highest TPC of extracts (145.8 mg GAE g(-1) dry material) was obtained in 5 mm and at a 1:30 solid-to-solvent ratio. For ultrasound extraction, the conditions that gave the highest TPC (105.5 mg GAE g(-1) dry material) were 20 min with a 1:30 solid-to-solvent ratio at 50% power. Extracts obtained at the optimum conditions of microwave and ultrasound were compared with conventional extraction and maceration, respectively TPC and antioxidant activity of the extract was the highest in microwave extraction among all extraction methods. In addition, microwave reduced extraction time by 83%.

Subject Keywords

Ultrasound, Phenolic, Microwave, Leaching, Melissa

URI

https://hdl.handle.net/11511/41926

Journal

TURKISH JOURNAL OF AGRICULTURE AND FORESTRY

DOI

https://doi.org/10.3906/tar-1201-1

Collections

Department of Food Engineering, Article

Suggestions

OpenMETU
Core

Comparison of microwave and ultrasound-assisted extraction techniques for leaching of phenolic compounds from nettle Ince, Alev Emine; Şahin, Serpil; Şümnü, Servet Gülüm (2014-10-01) In this study, extraction of phenolic compounds from nettle by microwave and ultrasound was studied. In both microwave and ultrasound-assisted extractions, effects of extraction time (5-20 min for microwave; 5-30 min for ultrasound) and solid to solvent ratio (1:10, 1:20, and 1:30 g/mL) on total phenolic content (TPC) were investigated. Effects of different powers (50 % and 80 %) were also studied for ultrasound-assisted extraction. In microwave-assisted extraction, the optimum TPC of the extracts (24.64 +/...
Microwave-Assisted Extraction of Phenolic Compounds from Caper DURMAZ, Ezgi; Şümnü, Servet Gülüm; Şahin, Serpil (2015-09-02) In this study, it was aimed to extract phenolic compounds from caper by using microwave and to compare the results with conventional extraction. For microwave-assisted extraction, power, extraction time, solid to solvent ratio, and solvent type were selected as independent variables. Dependent variables were total phenolic content (TPC), antioxidant activity, and concentration of phenolic compounds. The increase in solvent amount increased TPC. The highest TPC was obtained by using extraction conditions of ...
Usage of microwave and ultrasound in the extraction of essential oils and phenolic compounds İnce, Alev Emine; Şahin, Serpil; Şümnü, Servet Gülüm; Department of Food Engineering (2011) The objective of this study is to extract phenolic compounds from nettle and melissa by using microwave and ultrasound and to compare these methods with conventional extraction and maceration, respectively. Extraction of melissa essential oil was also studied. In extraction of phenolics, effects of extraction time (5-20 min for microwave; 5-30 min for ultrasound) and solid to solvent ratio (1:10, 1:20, 1:30 g/ml) on total phenolic content (TPC) were investigated for microwave and ultrasound extractions. Dif...
Production and characterization of boron carbide powder by mechanochemical method Büyüklüoğlu, Berkay; Sargın, Irmak; Department of Metallurgical and Materials Engineering (2023-1-27) In this study, the production of boron carbide (B4C) powders at room temperature by mechanochemical alloying is investigated. The conventional production methods of this industrially important material requires high energy consumption, whereas the low energy production methods could only produce small amounts. By optimizing the mechanochemical alloying, the know-how for the larger scale production is developed. The mechanochemical method consists of mechanical grinding and acid leaching to remove by-p...
Characterization of extracellular beta-lactamases from penicillin G-resistant cells of Streptococcus thermophilus Chirica, LC; Güray, Nülüfer Tülün; Gültekin, Güzin Candan; Bozoglu, F (International Association for Food Protection, 1998-07-01) In this study, biochemical properties of two extracellular beta-lactamases produced by penicillin-resistant Streptococcus thermophilus cells were investigated. Both beta-lactamases showed specificity for penicillins but not for cephaloridins. The p-lactamases exhibited different affinities for penicillin G. The one with the higher molecular weight (F1) had a K(m) value of 3.44 mu M and a V(max), value of 8.33, mu mol/min/mg of protein, whereas the beta-lactamase with the lower molecular weight (FII) had a K...

Citation Formats

A. E. INCE, S. Şahin, and S. G. Şümnü, “Extraction of phenolic compounds from melissa using microwave and ultrasound,” TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, pp. 69–75, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/41926.