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Hazam S, Touati S, Touati L, Saher L, Khedidji H, Ait Kaki S, Chemat S. Promising Algerian essential oils as natural acaricides against the honey bee mite Varroa destructor (Acari: Varroidae). Exp Appl Acarol 2024; 92:87-107. [PMID: 38015279 DOI: 10.1007/s10493-023-00866-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023]
Abstract
Varroosis induced by Varroa destructor Anderson and Trueman represents the most pathogenic and destructive disease affecting the western honey bee, Apis mellifera. In this study, we investigated the acaricidal activity against the Varroa mite using essential oils (EOs) from the aerial parts of four autochthonous Algerian herbal species, namely Artemisia herba alba, Artemisia campestris, Artemisia judaica and Ruta montana. EOs were obtained by means of hydrodistillation and their composition was characterized by gas chromatography-mass spectrometry. The toxicity of the selected EOs toward V. destructor and A. mellifera adult honey bees was evaluated using the complete exposure method. The results indicate the predominance of davanone (66.9%) in A. herba alba, β-pinene (19.5%) in A. campestris, piperitone (68.7%) in A. judaica and 2-undecanone (70.1%) in R. montana EOs. Interestingly, the LC50 values coupled to bee mortality rates revealed that all tested oils exhibited significant acaricidal efficiency with selectivity ratio (SR) values of 10.77, 8.78, 5.62 and 3.73 for A. campestris, A. judaica, A. herba alba, and R. montana, respectively. These values were better than that of thymol (SR = 3.65), the positive control. These findings suggest that these EOs could be used as plant-derived veterinary acaricides to control varroosis in field conditions.
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Affiliation(s)
- Souad Hazam
- Laboratory of Valorization and Conservation of Biological Resources (VALCOR), Faculty of Sciences, University of M'hamed Bougara, Boumerdes, Algeria.
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (CRAPC), Zone Industrielle de Bousmail, PB 384, Tipaza, 42004, Algeria.
| | - Salem Touati
- Multipurpose Agricultural Cooperative of Tizi-Ouzou (CAPTO), Tizi-Ouzou, Algeria
| | - Lounis Touati
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (CRAPC), Zone Industrielle de Bousmail, PB 384, Tipaza, 42004, Algeria
| | - Liza Saher
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (CRAPC), Zone Industrielle de Bousmail, PB 384, Tipaza, 42004, Algeria
| | - Hassiba Khedidji
- Laboratory of Valorization and Conservation of Biological Resources (VALCOR), Faculty of Sciences, University of M'hamed Bougara, Boumerdes, Algeria
| | - Sabrina Ait Kaki
- Laboratory of Valorization and Conservation of Biological Resources (VALCOR), Faculty of Sciences, University of M'hamed Bougara, Boumerdes, Algeria
| | - Smain Chemat
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques (CRAPC), Zone Industrielle de Bousmail, PB 384, Tipaza, 42004, Algeria
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Ikhlef A, Ait‐Amar H, Khelifi L, Chemat S. Optimization of silybin production from
Silybum marianum
tissue cell cultures using different elicitor solutions. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Ahlem Ikhlef
- Faculty of Process and Mechanical Engineering University Sciences and Technologies Houari Boumediene (USTHB) BP 32 16112 Alger Algeria
| | - Hamid Ait‐Amar
- Faculty of Process and Mechanical Engineering University Sciences and Technologies Houari Boumediene (USTHB) BP 32 16112 Alger Algeria
| | - Lakhdar Khelifi
- Laboratory of Genetic Resources & Biotechnology National School of Agricultural Sciences (ENSA) El‐Harrach Algiers Algeria
| | - Smain Chemat
- Extraction & Separation Techniques Team Research Centre in Chemical and Physical Analysis (CRAPC) Zone Industrielle de Bousmail BP 384 RP 42004 Tipaza Algeria
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Ahmed-Laloui H, Zaak H, Rahmani A, Kashi I, Chemat S, Miara MD, Cherb N, Derdour M. Assessment of artemisinin and antioxidant activities of three wild Artemisia species of Algeria. Nat Prod Res 2022; 36:6344-6352. [PMID: 35001764 DOI: 10.1080/14786419.2022.2025803] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Artemisinin, a natural product, has received considerable attention in the last few years as a potent antimalarial drug.This study reports the presence of Artemisinin in three Algerian wild Artemisia species assessed by HPLC method: A. herba-alba (AH), A. campestris subsp. glutinosa (AC), and A. judaica subsp sahariensis (AJ).The HPLC analysis of the hexane extracts, showed a difference in artemisinin content in studied species with a yield of 0.64%, 0.34% and 0.04% for AC, AH and AJ, respectively. Moreover, the level of artemisinin obtained in A. campestris was better than those found in A. sieberi and A. annua. This rate has been reported for the first time.Furthermore, the antiradical activities of methanolic extracts of plants were also tested. There was a remarkable antioxidant capacity found in all Artemisia methanolic extracts analysed.
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Affiliation(s)
- Hamza Ahmed-Laloui
- Animal Biotechnology Laboratory, Biotechnology and Agriculture Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
| | - Hadjer Zaak
- Food Biotechnology Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
| | - Abderrahman Rahmani
- Animal Biotechnology Laboratory, Biotechnology and Agriculture Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
| | - Imad Kashi
- Industry Biotechnology Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
| | - Smain Chemat
- Extraction & Separation Techniques Team, Centre de Recherches Scientifique et Technique en Analyses Physico-Chimiques (C.R.A.P.C.), Algiers, Algeria
| | - Mohamed Djamel Miara
- Department of Nature and life Science, Faculty of Nature and life Science, Ibn Khaldoun University, Tiaret, Algeria
| | - Nora Cherb
- Environment Biotechnology Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
| | - Mouna Derdour
- Animal Biotechnology Laboratory, Biotechnology and Agriculture Division, Biotechnology Research Center (C.R.Bt), Ali Mendjeli, Constantine, Algeria
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Sehailia M, Chemat S. Antimalarial-agent artemisinin and derivatives portray more potent binding to Lys353 and Lys31-binding hotspots of SARS-CoV-2 spike protein than hydroxychloroquine: potential repurposing of artenimol for COVID-19. J Biomol Struct Dyn 2021; 39:6184-6194. [PMID: 32696720 DOI: 10.26434/chemrxiv.12098652.v1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Medicinal herbs have proved along history to be a source of multiple cures. In this paper, we demonstrate how hydroxychloroquine can act as a good inhibitor of SARS-CoV-2 Spike protein receptor-binding-domain using molecular docking studies. We also unveil how hydroxychloroquine can interfere in the prevention of Lys353 in hACE2 from interacting with the corresponding binding hotspot present on the Spike protein. Further screening of artemisinin & derived compounds produced better Vina docking score than hydroxychloroquine (-7.1 kcal mol-1 for artelinic acid vs. -5.5 kcal mol-1 for hydroxychloroquine). Artesunate, artemisinin and artenimol, showed two mode of interactions with Lys353 and Lys31 binding hotspots of the Spike protein. Molecular dynamics analysis confirmed that the formed complexes are able to interact and remain stable in the active site of their respective targets. Given that these molecules are effective antivirals with excellent safety track records in humans against various ailment, we recommend their potential repurposing for the treatment of SARS-CoV-2 patients after successful clinical studies. In addition, an extraction protocol for artemisinin from Artemisia annua L. is proposed in order to cope with the potential urgent global demand. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Moussa Sehailia
- Research Centre in Physical and Chemical Analysis (C.R.A.P.C), Tipaza, Algeria
| | - Smain Chemat
- Research Centre in Physical and Chemical Analysis (C.R.A.P.C), Tipaza, Algeria
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Sehailia M, Chemat S. Antimalarial-agent artemisinin and derivatives portray more potent binding to Lys353 and Lys31-binding hotspots of SARS-CoV-2 spike protein than hydroxychloroquine: potential repurposing of artenimol for COVID-19. J Biomol Struct Dyn 2020; 39:6184-6194. [PMID: 32696720 PMCID: PMC7441758 DOI: 10.1080/07391102.2020.1796809] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Medicinal herbs have proved along history to be a source of multiple cures. In this paper, we demonstrate how hydroxychloroquine can act as a good inhibitor of SARS-CoV-2 Spike protein receptor-binding-domain using molecular docking studies. We also unveil how hydroxychloroquine can interfere in the prevention of Lys353 in hACE2 from interacting with the corresponding binding hotspot present on the Spike protein. Further screening of artemisinin & derived compounds produced better Vina docking score than hydroxychloroquine (-7.1 kcal mol−1 for artelinic acid vs. −5.5 kcal mol−1 for hydroxychloroquine). Artesunate, artemisinin and artenimol, showed two mode of interactions with Lys353 and Lys31 binding hotspots of the Spike protein. Molecular dynamics analysis confirmed that the formed complexes are able to interact and remain stable in the active site of their respective targets. Given that these molecules are effective antivirals with excellent safety track records in humans against various ailment, we recommend their potential repurposing for the treatment of SARS-CoV-2 patients after successful clinical studies. In addition, an extraction protocol for artemisinin from Artemisia annua L. is proposed in order to cope with the potential urgent global demand. Communicated by Ramaswamy H. Sarma
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Affiliation(s)
- Moussa Sehailia
- Research Centre in Physical and Chemical Analysis (C.R.A.P.C), Tipaza, Algeria
| | - Smain Chemat
- Research Centre in Physical and Chemical Analysis (C.R.A.P.C), Tipaza, Algeria
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Tahrioui A, Ortiz S, Azuama OC, Bouffartigues E, Benalia N, Tortuel D, Maillot O, Chemat S, Kritsanida M, Feuilloley M, Orange N, Michel S, Lesouhaitier O, Cornelis P, Grougnet R, Boutefnouchet S, Chevalier S. Membrane-Interactive Compounds From Pistacia lentiscus L. Thwart Pseudomonas aeruginosa Virulence. Front Microbiol 2020; 11:1068. [PMID: 32528451 PMCID: PMC7264755 DOI: 10.3389/fmicb.2020.01068] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 04/29/2020] [Indexed: 12/22/2022] Open
Abstract
Pseudomonas aeruginosa is capable to deploy a collection of virulence factors that are not only essential for host infection and persistence, but also to escape from the host immune system and to become more resistant to drug therapies. Thus, developing anti-virulence agents that may directly counteract with specific virulence factors or disturb higher regulatory pathways controlling the production of virulence armories are urgently needed. In this regard, this study reports that Pistacia lentiscus L. fruit cyclohexane extract (PLFE1) thwarts P. aeruginosa virulence by targeting mainly the pyocyanin pigment production by interfering with 4-hydroxy-2-alkylquinolines molecules production. Importantly, the anti-virulence activity of PLFE1 appears to be associated with membrane homeostasis alteration through the modulation of SigX, an extracytoplasmic function sigma factor involved in cell wall stress response. A thorough chemical analysis of PLFE1 allowed us to identify the ginkgolic acid (C17:1) and hydroginkgolic acid (C15:0) as the main bioactive membrane-interactive compounds responsible for the observed increased membrane stiffness and anti-virulence activity against P. aeruginosa. This study delivers a promising perspective for the potential future use of PLFE1 or ginkgolic acid molecules as an adjuvant therapy to fight against P. aeruginosa infections.
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Affiliation(s)
- Ali Tahrioui
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Sergio Ortiz
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Onyedikachi Cecil Azuama
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Emeline Bouffartigues
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Nabiha Benalia
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Damien Tortuel
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Olivier Maillot
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Smain Chemat
- Centre de Recherche Scientifique et Technique en Analyses Physico-Chimiques, CRAPC, Bou Ismaïl, Algeria
| | - Marina Kritsanida
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Marc Feuilloley
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Nicole Orange
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Sylvie Michel
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Olivier Lesouhaitier
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Pierre Cornelis
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
| | - Raphaël Grougnet
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Sabrina Boutefnouchet
- CiTCoM UMR 8038 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Équipe Produits Naturels, Analyses et Synthèses (PNAS), Université Paris Descartes, Paris, France
| | - Sylvie Chevalier
- Laboratoire de Microbiologie Signaux et Microenvironnement, LMSM EA4312, Université de Rouen Normandie, Normandie Université, Évreux, France
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Eddaikra N, Boudjelal A, Amine Sbabdji M, Eddaikra A, Boudrissa A, Mounir Bouhenna M, Chemat S, Harrat Z. Leishmanicidal and Cytotoxic Activity of Algerian Medicinal Plants on Leishmania major and Leishmania infantum. JoMMID 2019. [DOI: 10.29252/jommid.7.3.66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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Chemat S, Aissa A, Boumechhour A, Arous O, Ait-Amar H. Extraction mechanism of ultrasound assisted extraction and its effect on higher yielding and purity of artemisinin crystals from Artemisia annua L. leaves. Ultrason Sonochem 2017; 34:310-316. [PMID: 27773251 DOI: 10.1016/j.ultsonch.2016.05.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/16/2016] [Accepted: 05/28/2016] [Indexed: 06/06/2023]
Abstract
This study proposes an ultrasound-horn system for the extraction of a natural active compound "artemisinin" from Artemisia annua L. leaves as an alternative to hot maceration technique. Ultrasound leaching improves artemisinin recovery at all temperatures where only ten minutes is required to recover 70% (4.42mgg-1) compared to 60min of conventional hot leaching for the same yield. For instance, ultrasound treatment at 30°C produced a higher yield than the one obtained by conventional maceration at 40°C. Kinetic study suggests that the extraction pattern can be assimilated, during the first ten minutes, to a first order steady state, from which activation energy calculations revealed that each gram of artemisinin required 7.38kJ in ultrasound versus 10.3kJ in the conventional system. Modeling results indicate the presence of two extraction stages, a faster stage with a diffusion coefficient of 19×10-5cm2min-1 for ultrasound technique at 40°C, seven times higher than the conventional one; and a second deceleration stage similar for both techniques with diffusion coefficient ranging from 1.7 to 3.1×10-5cm2min-1. It is noted that the efficient ultrasound extraction potential implies extraction of higher amount of co-metabolites so low artemisinin crystal purity is engendered but a combination with a purification step using activated charcoal and celite adsorbents produced crystals with comparable purity for conventional and ultrasound samples.
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Affiliation(s)
- Smain Chemat
- Extraction & Separation Techniques Team, Centre de Recherches Scientifique et Technique en Analyses Physico-Chimiques (C.R.A.P.C.), BP 248 Alger RP 16004, Algiers, Algeria.
| | - Abdallah Aissa
- Extraction & Separation Techniques Team, Centre de Recherches Scientifique et Technique en Analyses Physico-Chimiques (C.R.A.P.C.), BP 248 Alger RP 16004, Algiers, Algeria
| | - Abdenour Boumechhour
- Extraction & Separation Techniques Team, Centre de Recherches Scientifique et Technique en Analyses Physico-Chimiques (C.R.A.P.C.), BP 248 Alger RP 16004, Algiers, Algeria; Faculté de Chimie, Université Houari Boumediene (USTHB), BP 32, El-Alia 16112 Bab-Ezzouar, Alger, Algeria
| | - Omar Arous
- Faculté de Chimie, Université Houari Boumediene (USTHB), BP 32, El-Alia 16112 Bab-Ezzouar, Alger, Algeria
| | - Hamid Ait-Amar
- Faculté de Génie des Procédés et de Génie Mécanique, Université Houari Boumediene (USTHB), BP 32, El-Alia 16112 Bab-Ezzouar, Alger, Algeria
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Lapkin A, Adou E, Mlambo BN, Chemat S, Suberu J, Collis AE, Clark A, Barker G. Integrating medicinal plants extraction into a high-value biorefinery: An example of Artemisia annua L. CR CHIM 2014. [DOI: 10.1016/j.crci.2013.10.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Suberu JO, Yamin P, Leonhard K, Song L, Chemat S, Sullivan N, Barker G, Lapkin AA. The effect of O-methylated flavonoids and other co-metabolites on the crystallization and purification of artemisinin. J Biotechnol 2014; 171:25-33. [DOI: 10.1016/j.jbiotec.2013.11.024] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 11/22/2013] [Accepted: 11/26/2013] [Indexed: 11/15/2022]
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Chemat S, Esveld ED. Contribution of microwaves or ultrasonics on carvone and limonene recovery from dill fruits (Anethum graveolens L.). INNOV FOOD SCI EMERG 2013. [DOI: 10.1016/j.ifset.2012.12.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Chemat S, Cherfouh R, Meklati BY, Belanteur K. Composition and microbial activity of thyme (Thymus algeriensis genuinus) essential oil. Journal of Essential Oil Research 2012. [DOI: 10.1080/10412905.2012.645303] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ferhat MA, Tigrine-Kordjani N, Chemat S, Meklati BY, Chemat F. Rapid Extraction of Volatile Compounds Using a New Simultaneous Microwave Distillation: Solvent Extraction Device. Chromatographia 2007. [DOI: 10.1365/s10337-006-0130-5] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Chemat S, Lagha A, AitAmar H, Bartels PV, Chemat F. Comparison of conventional and ultrasound-assisted extraction of carvone and limonene from caraway seeds. FLAVOUR FRAG J 2004. [DOI: 10.1002/ffj.1339] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Simultaneous microwave and ultrasound irradiation is shown as a new technique for digestion of solid and liquid samples suitable for chemical and food analysis. Its application in analytical chemistry has been shown by decreases in digestion time: determination of copper in edible oils and total Kjeldahl nitrogen.
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Affiliation(s)
- Smain Chemat
- Centre des Recherches Techniques et Scientifiques en Analyses Physico-chimiques, BP 248 Alger RP 16004 Alger, Algeria.
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Abstract
Currently humic substances are removed from the raw water prior to chlorination by the conventional coagulation and filtration method using aluminium sulphate. Application of high-intensity (> 10 W/cm2) ultrasonic irradiation in conjunction with oxidative process using commercial oxidants H2O2 was investigated as an alternative. Sono-oxidation and sonodegradation of natural and synthetic humic substances have been followed over time by measuring total organic carbon (TOC) and absorbance by ultraviolet spectrometer (UV-VIS). It took approximately 60 min to reduce TOC by half and to have a complete degradation of humic acid.
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Affiliation(s)
- F Chemat
- Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, Faculté des Sciences et Technologies, Université de la Réunion, 15 Avenue René Cassin, B.P. 7151, F-97715 Saint Denis messag, La Réunion, France D.O.M.
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Lagha A, Chemat S, Bartels PV, Chemat F. Microwave - ultrasound combined reactor suitable for atmospheric sample preparation procedure of biological and chemical products. ACTA ACUST UNITED AC 1999. [DOI: 10.1051/analusis:1999124] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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