Institution
University of Avignon
Education•Avignon, Provence-Alpes-Côte-d'Azur, France•
About: University of Avignon is a education organization based out in Avignon, Provence-Alpes-Côte-d'Azur, France. It is known for research contribution in the topics: Population & Speaker recognition. The organization has 1526 authors who have published 3766 publications receiving 88928 citations.
Topics: Population, Speaker recognition, Context (language use), Extraction (chemistry), Wireless network
Papers published on a yearly basis
Papers
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TL;DR: Although MWE at 100 degrees C typically affords higher yields in total phenols, Mwe at 80 degrees C appears more convenient for the extraction of the green tea-specific and chemically sensitive flavanols.
Abstract: Introduction – Green tea, a popular drink with beneficial health properties, is a rich source of specific flavanols (polyphenols). There is a special interest in the water extraction of green tea polyphenols since the composition of the corresponding extracts is expected to reflect the one of green tea infusions consumed worldwide.
Objective – To develop a microwave-assisted water extraction (MWE) of green tea polyphenols.
Methodology – MWE of green tea polyphenols has been investigated as an alternative to water extraction under conventional heating (CWE). The experimental conditions were selected after consideration of both temperature and extraction time. The efficiency and selectivity of the process were determined in terms of extraction time, total phenolic content, chemical composition (HPLC-MS analysis) and antioxidant activity of the extracts.
Results – By MWE (80°C, 30 min), the flavanol content of the extract reached 97.46 (± 0.08) mg of catechin equivalent/g of green tea extract, vs. only 83.06 (± 0.08) by CWE (80°C, 45 min). In particular, the concentration of the most bioactive flavanol EGCG was 77.14 (± 0.26) mg of catechin equivalent/g of green tea extract obtained by MWE, vs 64.18 (± 0.26) mg/g by CWE.
Conclusion – MWE appears more efficient than CWE at both 80 and 100°C, particularly for the extraction of flavanols and hydroxycinnamic acids. Although MWE at 100°C typically affords higher yields in total phenols, MWE at 80°C appears more convenient for the extraction of the green tea-specific and chemically sensitive flavanols. Copyright © 2009 John Wiley & Sons, Ltd.
110 citations
TL;DR: Microwave extraction offers important advantages like shorter extraction time (23min), cleaner feature (no solvent or water used) and extraction of valuable onion crude juice retaining fresh organoleptic properties with higher phenolic content at optimized power (500W).
110 citations
TL;DR: In this paper, a non-destructive optical method based on near-infrared spectroscopy has been used for the evaluation of apricot fruit quality, and the relationship between spectral wavelengths and quality attributes was evaluated by application of chemometric techniques based on partial least squares (PLS) on fruit set divided randomly into two groups: 598 fruits for calibration and 279 for validation.
109 citations
TL;DR: Microwave steam diffusion was developed as a cleaner and new process design and operation for isolation of essentials oils and was compared to conventional steam diffusion, and was better than SD in terms of energy saving, cleanliness and reduced waste water.
109 citations
TL;DR: In this paper, the authors collected visible and thermal infrared images with an unmanned aerial vehicle and established a comprehensive rice lodging recognition model using a particle swarm optimization and support vector machine algorithm.
109 citations
Authors
Showing all 1574 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Peter J. Diggle | 85 | 518 | 40325 |
| Frédéric Baret | 73 | 289 | 25453 |
| Farid Chemat | 71 | 339 | 18533 |
| Eitan Altman | 60 | 637 | 16760 |
| Mathilde Causse | 56 | 122 | 11973 |
| Giancarlo Cravotto | 54 | 484 | 13555 |
| Montserrat Dueñas | 52 | 117 | 6401 |
| Catherine M.G.C. Renard | 52 | 235 | 9183 |
| Pierre Renault | 49 | 172 | 23844 |
| Yves Le Conte | 48 | 155 | 7985 |
| Christophe Nguyen-The | 47 | 122 | 7499 |
| Olivier Ouari | 46 | 145 | 6231 |
| Miguel A. Pappolla | 46 | 121 | 9864 |
| Marie-Josèphe Amiot | 45 | 113 | 7893 |
| Marie Weiss | 44 | 139 | 9955 |