Results 291 to 300 of about 2,061,847 (332)

Determination of tobramycin in soil by HPLC with ultrasonic-assisted extraction and solid-phase extraction

Journal of Chromatography B, 2011
Pharmaceuticals residues in the environment have become a growing scientific interest worldwide. In the light of the possible harmful effects of tobramycin, a rapid and sensitive analytical method for determination of tobramycin in soil was developed. The extraction and purification methods, derivatization conditions, and chromatographic conditions in ...
Shun, He, Qiyou, Chen, Yan, Sun, Yuncong, Zhu, Laixin, Luo, Jianqiang, Li, Yongsong, Cao   +6 more
openaire   +2 more sources

Optimization of Ultrasonic-Assisted Extraction of Phenolic Compounds from Apples

Food Analytical Methods, 2015
In order to optimize conditions for the extraction of polyphenols from apples, peel and flesh of apples were subjected to an extraction process with different solvents consisting of various ratios of methanol and water (40%, 60%, 80%), 100% methanol or with methanol acidified with hydrochloric acid (0.1%). Extractions were performed using an ultrasonic
Lidija Jakobek, Martina Boc, Andrew R. Barron   +2 more
openaire   +1 more source

Green and efficient extraction of phenolic compounds from Neem leaves using deep eutectic solvents based ultrasonic-assisted extraction.

Food Chemistry
Deep eutectic solvent (DES) combined with ultrasonic-assisted extraction was employed as an environmentally friendly technique for extracting antioxidant phenolic compounds from Neem leaves in place of organic solvents.
Kirandeep Kaur, P. Schmitt‐Kopplin, Ashok Kumar Malik   +2 more
semanticscholar   +1 more source

Optimization of ultrasonic-assisted extraction for herbicidal activity of chicory root extracts

Industrial Crops and Products, 2011
Abstract The present study evaluated the herbicidal potential of extracts from chicory (Cichorium intybus L.) roots on the germination of Echinochloa crusgalli L. Beauv and Amaranthus retroflexus L. Eight ultrasonic assisted-extraction (UAE) conditions were optimized, using an orthogonal matrix design.
Quanzhen Wang, Yuyan Liu, Jian Cui, Jinhong Du, Guo Chen, Haitao Liu   +5 more
openaire   +1 more source

Ultrasonic-assisted extraction for flavonoid compounds content and antioxidant activities of India Moringa oleifera L. leaves: Simultaneous optimization, HPLC characterization and comparison with other methods

, 2020
In this work, the performance of ultrasonic-assisted extraction (UAE) in simultaneously enhancing the total flavonoid content (TFC) and antioxidant activities of India Moringa oleifera L.
Xue Lin, Lingfeng Wu, Xiong-Ke Wang, Linling Yao, Lu Wang   +4 more
semanticscholar   +1 more source

Recovery of astaxanthin from shrimp (Penaeus vannamei) waste by ultrasonic-assisted extraction using ionic liquid-in-water microemulsions.

Food Chemistry, 2020
In this study, an ultrasonic-assisted extraction using microemulsions was developed for the recovery of natural astaxanthin from shrimp waste. To select applicable solvent systems, the phase equilibrium, microstructure, and physical properties of the ...
Jing Gao, Juyu You, Juhong Kang, Fang-Hong Nie, Hong-Wu Ji, Shucheng Liu   +5 more
semanticscholar   +1 more source

Ultrasonic Assisted Cloud Point Extraction of Polyaromatic Hydrocarbons

Separation Science and Technology, 2007
Abstract Cloud point extraction (CPE) of three PAHs, anthracene, phenanthrene, and pyrene was performed in an ultrasonic environment with Tergitol TMN‐6 as extractant. During the process, surfactant micelle aggregates came out gradually and deposited to form a surfactant‐rich phase.
Bingjia Yao, Li Yang
openaire   +1 more source

Ultrasonic-assisted extraction of polyphenols and antioxidants from Picea abies bark

Journal of Biotechnology, 2020
Spruce bark represents a reservoir of bioactive compounds. The aim of this study was to investigate the effect of independent variables (temperature, liquid to solid ratio, time and methanol content) and their interaction within the extraction process by the response surface methodology (RSM).
Daniela, Chmelová, Dominika, Škulcová, Barbora, Legerská, Miroslav, Horník, Miroslav, Ondrejovič   +4 more
openaire   +2 more sources

Study on optimization of ultrasonic assisted extraction of phenolic compounds from rye bran

, 2020
Ultrasonic assisted extraction (UAE) conditions for the extraction of phenolic compounds from rye bran (RB) were optimized by using response surface methodology.
M. Iftikhar, Hui-Juan Zhang, Asra Iftikhar, A. Raza, N. Begum, Afroza Tahamina, H. Syed, Majid Khan, Jing Wang   +8 more
semanticscholar   +1 more source

Development, comparison and application of sorbent-assisted accelerated solvent extraction, microwave-assisted extraction and ultrasonic-assisted extraction for the determination of polybrominated diphenyl ethers in sediments

Journal of Chromatography A, 2016
Fast and selective analytical methods were developed based on sorbent-assisted mechanism and microwave-assisted extraction (SA-MAE), accelerate solvent extraction (SA-ASE) and ultrasonic-assisted extraction (SA-UAE) for the determination of polybrominated diphenyl ethers (PBDEs) in sediments.
Shanjun, Song, Mingwu, Shao, Hua, Tang, Yajuan, He, Weihua, Wang, Liliang, Liu, Jiajia, Wu   +6 more
openaire   +2 more sources