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Ghorbel M, Zribi I, Besbes M, Bouali N, Brini F. Catalase Gene Family in Durum Wheat: Genome-Wide Analysis and Expression Profiling in Response to Multiple Abiotic Stress Conditions. Plants (Basel) 2023; 12:2720. [PMID: 37514334 PMCID: PMC10384705 DOI: 10.3390/plants12142720] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/30/2023]
Abstract
Catalase (CAT) is an antioxidant enzyme expressed by the CAT gene family and exists in almost all aerobic organisms. In fact, the CAT enzyme modulates the hydrogen peroxide (H2O2) contents in cells by translating this toxic compound into water (H2O) and O2- to reduce reactive oxygen species (ROS) contents in cells. ROS are produced as a result of biotic and abiotic environmental stressors. To avoid ROS toxicity, plants are armed with different enzymatic and non-enzymatic systems to decompose ROS. Among the enzymatic system, CAT proteins are well studied. CAT not only controls growth and development in plants but is also involved in plant defense against different stresses. So far, the CAT gene family has not been reported in durum wheat (Triticum turgidum ssp. durum L.). Therefore, a genome-wide comprehensive analysis was conducted to classify the CAT genes in the durum wheat genome. Here, six TdCAT genes were identified. Based on phylogenetics, the TdCAT genes belong to three groups (Groups I-III) which is explainable by their comparable structural characteristics. Using bio-informatic analysis, we found that the secondary and tertiary structures were conserved among plants and present similar structures among durum wheat CATs. Two conserved domains (pfam00199 and pfam06628) are also present in all identified proteins, which have different subcellular localizations: peroxisome and mitochondrion. By analyzing their promoters, different cis-elements were identified, such as hormone-correlated response and stress-related responsive elements. Finally, we studied the expression pattern of two catalase genes belonging to two different sub-classes under different abiotic stresses. Expression profiling revealed that TdCAT2 and TdCAT3 presented a constitutive expression pattern. Moreover, both genes are induced in response to salt, mannitol, cold, heat and ABA. Thus, we speculate that those genes are activated by different stresses, such as oxygen deficiency, light, cold, abscisic acid and methyl jasmonate. Further, this study will help in understanding the behavior of CAT genes during environmental stress in durum wheat and in Triticeae species in general.
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Affiliation(s)
- Mouna Ghorbel
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha'il City 81451, Saudi Arabia
| | - Ikram Zribi
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha'il City 81451, Saudi Arabia
| | - Malek Besbes
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha'il City 81451, Saudi Arabia
| | - Nouha Bouali
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha'il City 81451, Saudi Arabia
| | - Faiçal Brini
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia
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Zribi I, Ghorbel M, Haddaji N, Besbes M, Brini F. Genome-Wide Identification and Expression Profiling of Pathogenesis-Related Protein 1 ( PR-1) Genes in Durum Wheat ( Triticum durum Desf.). Plants (Basel) 2023; 12:1998. [PMID: 37653915 PMCID: PMC10223549 DOI: 10.3390/plants12101998] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/03/2023] [Accepted: 05/09/2023] [Indexed: 07/30/2023]
Abstract
Pathogen-related proteins (PRs) are diversified proteins with a low molecular weight implicated in plant response to biotic and abiotic stress as well in regulating different functions in plant maturation. Interestingly, no systematical study has been conducted in durum wheat (Triticum turgidum subsp. durum). In the present study, 12 PR-1 genes encoding a CAP superfamily domain were identified in the genome of Triticum turgidum subsp. durum, which is an important cereal, using in silico approaches. Additionally, phylogenetic analysis showed that the PR-1 genes were classified into three groups based on their isoelectric point and the conserved motif domain. Moreover, our analysis showed that most of the TdPR-1 proteins presented an N-terminal signal peptide. Expression patterns analysis showed that the PR-1 gene family presented temporal and spatial specificity and was induced by different abiotic stresses. This is the first report describing the genome-scale analysis of the durum wheat PR-1 gene family, and these data will help further study the roles of PR-1 genes during stress responses, leading to crop improvement.
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Affiliation(s)
- Ikram Zribi
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia;
| | - Mouna Ghorbel
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia; (M.G.); (N.H.); (M.B.)
| | - Najla Haddaji
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia; (M.G.); (N.H.); (M.B.)
| | - Malek Besbes
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia; (M.G.); (N.H.); (M.B.)
| | - Faiçal Brini
- Laboratory of Biotechnology and Plant Improvement, Centre of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia;
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Yacoub A, Ayadi A, Ayed W, Ayari S, Chebbi S, Magroun I, Ben Afia L, Mersni M, Mechergui N, Brahim D, Ben Said H, Bahri G, Youssef I, Ladhari N, Mziou N, Grassa A, M'rad M, Khessairi N, Krir A, Chihaoui M, Mahjoub S, Bahlous A, Jridi M, Cherif Y, Derbal S, Chebbi D, Hentati O, Ben Dahmen F, Abdallah M, Hamdi I, Sahli F, Ouerdani Y, Mnekbi Y, Abaza H, Ajmi M, Guedria A, Randaline A, Ben Abid H, Gaddour N, Maatouk A, Zemni I, Gara A, Kacem M, Maatouk I, Ben Fredj M, Abroug H, Ben Nasrallah C, Dhouib W, Bouanene I, Sriha A, Mahmoudi M, Gharbi G, Khsiba A, Azouz M, Ben Mohamed A, Yakoubi M, Medhioub M, Hamzaoui L, Azouz M, Ben Attig Y, Hamdi S, Essid R, Ben Jemia E, Rezgui B, Boudaya MS, Hassine H, Dabbabi H, Fradi Y, Cherif D, Lassoued I, Yacoub H, Kchir H, Maamouri N, Khairi W, Ben Ammar H, Abaza H, Chelbi E, Merhaben S, Neffati W, Ajmi M, Tarchalla S, Boughzala S, Gazzeh M, Gara S, Labidi A, Touati H, Nefzi AM, Ben Mustpha N, Fekih M, Serghini M, Boubaker J, Zouiten L, Driss A, Meddeb N, Driss I, Walha S, Ben Said H, Bel Hadj Mabrouk E, Zaimi Y, Mensi A, Trad N, Ayadi S, Said Y, Mouelhi L, Dabbèche R, Belfkih H, Bani M, Moussa A, Souissi S, Trabelsi Werchfeni B, Chelly S, Ezzi O, Ammar A, Besbes M, Njah M, Mahjoub M, Ghali H, Neffati A, Bhiri S, Bannour R, Ayadi S, Khouya FE, Kamel A, Hariz E, Aidani S, Kefacha S, Ben Cheikh A, Said H, Dogui S, Atig A, Gara A, Ezzar S, Ben Fradj M, Bouanène I, M'kadmi H, Farhati M, Dakhli N, Nalouti K, Chanoufi MB, Abouda SH, Louati C, Zaaimi Y, Dabbeche R, Hermi A, Saadi A, Mokaddem S, Boussaffa H, Bellali M, Zaghbib S, Ayed H, Bouzouita A, Derouiche A, Allouche M, Chakroun M, Ben Slama R, Gannoun N, Kacem I, Tlili G, Kahloul M, Belhadj Chabbah N, Douma F, Bouhoula M, Chouchene A, Aloui A, Maoua M, Brahem A, Kalboussi H, El Maalel O, Chatti S, Jaidane M, Naija W, Mrizek N, Sellami I, Feki A, Hrairi A, Kotti N, Baklouti S, Jmal Hammami K, Masmoudi ML, Hajjaji M, Naaroura A, Ben Amar J, Ouertani H, Ben Moussa O, Zaibi H, Aouina H, Ben Jemaa S, Gassara Z, Ezzeddine M, Kallel MH, Fourati H, Akrout R, Kallel H, Ayari M, Chehaider A, Souli F, Abdelaali I, Ziedi H, Boughzala C, Haouari W, Chelli M, Soltani M, Trabelsi H, Sahli H, Hamdaoui R, Masmoudi Y, Halouani A, Triki A, Ben Amor A, Makni C, Eloillaf M, Riahi S, Tlili R, Jmal L, Belhaj Ammar L, Nsibi S, Jmal A, Boukhzar R, Somai M, Daoud F, Rachdi I, Ben Dhaou B, Aydi Z, Boussema F, Frikha H, Hammami R, Ben Cheikh S, Chourabi S, Bokri E, Elloumi D, Hasni N, Hamza S, Berriche O, Dalhoum M, Jamoussi H, Kallel L, Mtira A, Sghaier Z, Ghezal MA, Fitouri S, Rhimi S, Omri N, Rouiss S, Soua A, Ben Slimene D, Mjendel I, Ferchichi I, Zmerli R, Belhadj Mabrouk E, Debbeche R, Makhloufi M, Chouchane A, Sridi C, Chelly F, Gaddour A, Kacem I, Chatti S, Mrizak N, Elloumi H, Debbabi H, Ben Azouz S, Marouani R, Cheikh I, Ben Said M, Kallel M, Amdouni A, Rejaibi N, Aouadi L, Zaouche K, Khouya FE, Aidani S, Khefacha S, Jelleli N, Sakly A, Zakhama W, Binous MY, Ben Said H, Bouallegue E, Jemmali S, Abcha S, Wahab H, Hmida A, Mabrouk I, Mabrouk M, Elleuch M, Mrad M, Ben Safta N, Medhioub A, Ghanem M, Boughoula K, Ben Slimane B, Ben Abdallah H, Bouali R, Bizid S, Abdelli MN, Ben Nejma Y, Bellakhal S, Antit S, Bourguiba R, Zakhama L, Douggui MH, Bahloul E, Dhouib F, Turki H, Sabbah M, Baghdadi S, Trad D, Bellil N, Bibani N, Elloumi H, Gargouri D, Ben Said M, Hamdaoui R, Chokri R, Kacem M, Ben Rejeb M, Miladi A, Kooli J, Touati S, Trabelsi S, Klila M, Rejeb H, Kammoun H, Akrout I, Greb D, Ben Abdelghaffar H, Hassene H, Fekih L, Smadhi H, Megdiche MA, Ksouri J, Kasdalli H, Hayder A, Gattoussi M, Chérif L, Ben Saida F, Gueldich M, Ben Jemaa H, Dammak A, Frikha I, Saidani A, Ben Amar J, Aissi W, Chatti AB, Naceur I, Ben Achour T, Said F, Khanfir M, Lamloum M, Ben Ghorbel I, Houman M, Cherif T, Ben Mansour A, Daghfous H, Slim A, Ben Saad S, Tritar F, Naffeti W, Abdellatif J, Ben Fredj M, Selmi M, Kbir GH, Maatouk M, Jedidi L, Taamallah F, Ben Moussa M, Halouani L, Rejeb S, Khalffalah N, Ben Ammar J, Hedhli S, Azouz MM, Chatti S, Athimni Z, Bouhoula M, Elmaalel O, Mrizak N, Maalej M, Kammoun R, Gargouri F, Sallemi S, Haddar A, Masmoudi K, Oussaifi A, Sahli A, Bhouri M, Hmaissi R, Friha M, Cherif H, Baya C, Triki M, Yangui F, Charfi MR, Ben Hamida HY, Karoui S, Aouini F, Hajlaoui A, Jlassi H, Sabbah M, Fendri MN, Kammoun N, Fehri S, Nouagui H, Harzalli A, Snène H, Belakhal S, Ben Hassine L, Labbene I, Jouini M, Kalboussi S, Ayedi Y, Harizi C, Skhiri A, Fakhfakh R, Jelleli B, Belkahla A, Fejjeri M, Zeddini M, Mahjoub S, Nouira M, Frih N, Debiche S, Blibech H, Belhaj S, Mehiri N, Ben Salah N, Louzir B, Kooli J, Bahri R, Chaka A, Abdenneji S, Majdoub Fehri S, Hammadi J, Dorgham D, Hriz N, Kwas H, Issaoui N, Jaafoura S, Bellali H, Shimi M, Belhaj Mabrouk E, Sellami R, Ketata I, Medi W, Mahjoub M, Ben Yacoub S, Ben Chaabene A, Touil E, Ben Ayed H, Ben Miled S, El Zine E, Khouni H, Ben Kadhi S, Maatoug J, Boulma R, Rezgui R, Boudokhane M, Jomni T, Chamekh S, Aissa S, Touhiri E, Jlaiel N, Oueslati B, Maaroufi N, Aouadi S, Belkhir S, Daghfous H, Merhaben S, Dhaouadi N, Ounaes Y, Chaker K, Yaich S, Marrak M, Bibi M, Mrad Dali K, Sellami A, Nouira Y, Sellami S, Anane I, Trabelsi H, Ennaifer R, Benzarti Z, Bouchabou B, Hemdani N, Nakhli A, Cherif Y, Abdelkef M, Derbel K, Barkous B, Yahiaoui A, Sayhi A, Guezguez F, Rouatbi S, Racil H, Ksouri C, Znegui T, Maazaoui S, Touil A, Habibech S, Chaouech N, Ben Hmid O, Ismail S, Chouaieb H, Chatti M, Guediri N, Belhadj Mohamed M, Bennasrallah C, Bouzid Y, Zaouali F, Toumia M, El Khemiri N, El Khemiri A, Sfar H, Farhati S, Ben Chehida F, Yamoun R, Braham N, Hamdi Y, Ben Mansour A, Mtir M, Ayari M, Toumia M, Rouis S, Sakly H, Nakhli R, Ben Garouia H, Chebil D, Hannachi H, Merzougui L, Samet S, Hrairi A, Mnif I, Hentati O, Bouzgarrou L, Souissi D, Boujdaria R, Kadoussi R, Rejeb H, Ben Limem I, Ben Salah I, Greb D, Ben Abdelghaffar H, Smadhi H, Laatiri H, Manoubi SA, Gharbaoui M, Hmandi O, Zhioua M, Taboubi F, Hamza Y, Hannach W, Jaziri H, Gharbi R, Hammami A, Dahmani W, Ben Ameur W, Ksiaa M, Ben Slama A, Brahem A, Elleuch N, Jmaa A, Kort I, Jlass S, Benabderrahim S, Turki E, Belhaj A, Kebsi D, Ben Khelil M, Rmadi N, Gamaoun H, Alaya Youzbechi F, Brahim T, Boujnah S, Abid N, Gader N, Kalboussi S, Ben Sassi S, Loukil M, Ghrairi H, Ben Said N, Mrad O, Ferjaoui M, Hedhli L, Ben Kaab B, Berriche A, Charfi R, Mourali O, Smichi I, Bel Haj Kacem L, Ksentini M, Aloui R, Ferchichi L, Nasraoui H, Maoua M, Chérif F, Belil Y, Ayed MA, Alloulou Y, Belhadj S, Daghfous J, Mehiri N, Louzir B, Abbes A, Ghrab A, Chermiti A, Akacha A, Mejri O, Debbiche A, Yahiaoui C, Binous M, Tissaoui A, Mekni K, El Fekih C, Said MA, Chtioui S, Mestiri S, Smaoui H, Ben Hamida S, Haddar A, Mrizek N, Gares N, Zaibi A, Bouazizi N, Gallas S, Lachhab A, Belhadj M, Hadj Salem N, Garrouch A, Mezgar Z, Khrouf M, Abbassi H, Souissi D, Hamra I, Ben Mustapha N, Abessi I, Boubaker F, Bouchareb S, ElOmma Mrabet H, Touil I, Boussoffara L, Knani J, Boudawara N, Alaya W, Sfar MH, Fekih S, Snène H, Boudawara N, Gargouri I, Benzarti W, Knaz A, Abdelghani A, Aissa S, Hayouni A, Mejri I, Kacem M, Mhamdi S, Daboussi S, Aichaouia C, Moatemri Z, Chaachou A, Fsili R, Ben Ghezala H, Ben Jazia A, Brahmi N. 2022 TUNISIAN NATIONAL CONGRESS OF MEDICINE ABSTRACTS. Tunis Med 2023; 101:62-64. [PMID: 37682263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Indexed: 09/09/2023]
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Ghorbel M, Besbes M, Haddaji N, Bouali N, Brini F. Identification and Expression Profiling of Two Saudi Arabia Catalase Genes from Wheat and Barley in Response to Abiotic and Hormonal Stresses. Antioxidants (Basel) 2022; 11:2208. [PMID: 36358580 PMCID: PMC9686680 DOI: 10.3390/antiox11112208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 10/31/2022] [Accepted: 11/03/2022] [Indexed: 07/30/2023] Open
Abstract
Catalase is a crucial enzyme in antioxidant defense systems protecting eukaryotes from oxidative stress. These proteins are present in almost all living organisms and play important roles in controlling plant responses to biotic and abiotic stresses by catalyzing the decomposition of H2O2. Despite their importance, little is known about their expression in the majority of monocotyledonous species. Here, we isolated and characterized two novel catalase genes from Triticum turgidum and Hordeum vulgare, designated as TtCAT1 and HvCAT1, respectively. Phylogenetic analysis revealed that TtCAT1 and HvCAT1 presented 492 aa and shared an important identity with other catalase proteins belonging to subfamily 1. Using bioinformatic analysis, we predicted the 3D structure models of TtCAT1 and HvCAT1. Interestingly, analysis showed that the novel catalases harbor a peroxisomal targeting signal (PTS1) located at their C-terminus portion, as shown for other catalase proteins. In addition, this motif is responsible for the in silico peroxisomal localization of both proteins. Finally, RT-qPCR analysis showed that TtCAT1 and HvCAT1 are highly expressed in leaves in normal conditions but faintly in roots. Moreover, both genes are upregulated after the application of different stresses such as salt, osmotic, cold, heavy metal, and hormonal stresses. The positive responses of TtCAT1 and HvCAT1 to the various stimuli suggested that these proteins can help to protect both species against environmental stresses.
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Affiliation(s)
- Mouna Ghorbel
- Biology Department, Faculty of Science, University of Hail, Ha’il 2440, Saudi Arabia
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, Sfax 3018, Tunisia
| | - Malek Besbes
- Biology Department, Faculty of Science, University of Hail, Ha’il 2440, Saudi Arabia
| | - Najla Haddaji
- Biology Department, Faculty of Science, University of Hail, Ha’il 2440, Saudi Arabia
| | - Nouha Bouali
- Biology Department, Faculty of Science, University of Hail, Ha’il 2440, Saudi Arabia
| | - Faiçal Brini
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, Sfax 3018, Tunisia
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Ghorbel M, Feki K, Tounsi S, Bouali N, Besbes M, Brini F. The Putative Auto-Inhibitory Domain of Durum Wheat Catalase (TdCAT1) Positively Regulates Bacteria Cells in Response to Different Stress Conditions. Antioxidants (Basel) 2022; 11:antiox11091820. [PMID: 36139894 PMCID: PMC9495866 DOI: 10.3390/antiox11091820] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 09/03/2022] [Accepted: 09/09/2022] [Indexed: 01/24/2023] Open
Abstract
Catalase is a crucial enzyme in the antioxidant defense system protecting organisms from oxidative stress. Proteins of this kind play important roles in controlling plant response to biotic and abiotic stresses by catalyzing the decomposition of H2O2. The durum wheat catalase 1, TdCAT1, has been previously isolated and characterized. Here, using bio-informatic analysis, we showed that durum wheat catalase 1 TdCAT1 harbors different novel conserved domains. In addition, TdCAT1 contains various phosphorylation residues and S-Nitrosylation residues located at different positions along the protein sequence. TdCAT1 activity decreased after treatment with λ−phosphatase. On the other hand, we showed that durum wheat catalase 1 (TdCAT1) exhibits a low CAT activity in vitro, whereas a deleted form of TdCAT1 has better activity compared to the full-length protein (TdCAT460), suggesting that TdCAT1 could present a putative autoinhibitory domain in its C-terminal portion. Moreover, we showed that TdCAT1 positively regulates E. coli cells in response to salt, ionic and osmotic stresses as well as heavy metal stress in solid and liquid mediums. Such effects had not been reported and lead us to suggest that the durum wheat catalase 1 TdCAT1 protein could play a positive role in response to a wide array of abiotic stress conditions.
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Affiliation(s)
- Mouna Ghorbel
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia
| | - Kaouthar Feki
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia
| | - Sana Tounsi
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia
| | - Nouha Bouali
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia
| | - Malek Besbes
- Department of Biology, College of Sciences, University of Hail, P.O. Box 2440, Ha’il City 81451, Saudi Arabia
| | - Faiçal Brini
- Laboratory of Biotechnology and Plant Improvement, Center of Biotechnology of Sfax, P.O. Box 1177, Sfax 3018, Tunisia
- Correspondence:
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Ben Othman A, Belkilani K, Besbes M. Prediction improvement of potential PV production pattern, imagery satellite-based. Sci Rep 2020; 10:19951. [PMID: 33204008 PMCID: PMC7673135 DOI: 10.1038/s41598-020-76957-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 10/26/2020] [Indexed: 11/25/2022] Open
Abstract
The results obtained by using an existing model to estimate global solar radiation (GHI) in three different locations in Tunisia. These data are compared with GHI meteorological measurements and PV_Gis satellite imagery estimation. Some statistical indicators (R, R2, MPE, AMPE, MBE, AMBE and RMSE) have been used to measure the performance of the used model. Correlation coefficient for the different stations was close to 1.0. The meteorology and satellite determination coefficient (R2) were also near 1.0 except in the case of Nabeul station in which the meteorology measurements (R) were equals to 0.5848 because of the loss of data in this location due to meteorological conditions. This numerical model provides the best performance according to statistical results in different locations; therefore, this model can be used to estimate global solar radiation in Tunisia. The R square values are used as a statistical indicator to demonstrate that the model’s results are compatible with those of meteorology with a percentage of error less than 10%.
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Karray R, Jamoussi A, Ayed S, Lakhdhar D, Rachdi E, Ben Khelil J, Besbes M. Surmortalité de l’insuffisance rénale aiguë oligoanurique au cours de la COVID-19 : étude prospective tunisienne. Nephrol Ther 2020. [PMCID: PMC7494301 DOI: 10.1016/j.nephro.2020.07.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Trigui R, Yahyaoui S, Zaraa S, Abidi R, Youssfi A, Mahjoubi K, Belaid A, Nasr C, Saidani I, Abassi A, Jlassi I, Aouinti K, Besbes M, Dkhil I, Sghaier S, Abidi F, Zidi A. Curiethérapie utérovaginale préopératoire du cancer du col utérin : quelles doses pour les ovaires ? Cancer Radiother 2019. [DOI: 10.1016/j.canrad.2019.07.094] [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: 10/26/2022]
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Tounsi N, Essadok A, Saidani I, Mahdouani M, Hadhri A, Zaidi E, Ben Salem L, Nasr C, Besbes M. Technique de réduction de la dose rétrodiffusée due aux implantations dentaires métalliques. Cancer Radiother 2019. [DOI: 10.1016/j.canrad.2019.07.084] [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: 11/27/2022]
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Iff WA, Hugonin JP, Sauvan C, Besbes M, Chavel P, Vienne G, Milord L, Alliata D, Herth E, Coste P, Bosseboeuf A. Electromagnetic analysis for optical coherence tomography based through silicon vias metrology. Appl Opt 2019; 58:7472-7488. [PMID: 31674397 DOI: 10.1364/ao.58.007472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This paper reports on progress in the analysis of time-domain optical coherence tomography (OCT) applied to the dimensional metrology of through-silicon vias (TSVs), which are vertical interconnect accesses in silicon, enabling three-dimensional (3D) integration in microelectronics, and estimates the deviations from earlier, simpler models. The considered TSV structures are 1D trenches and circular holes etched into silicon with a large aspect ratio. As a prerequisite for a realistic modeling, we work with spectra obtained from reference interferograms measured at a planar substrate, which fully includes the dispersion of the OCT apparatus. Applying a rigorous modal approach, we estimate the differences to a pure ray tracing technique. Accelerating our computations, we focus on the relevant fundamental modes and apply a Fabry-Perot model as an efficient approximation. Exploiting our results, we construct and present an iterative procedure based on the minimization of a merit function, which concludes TSV heights reliably, accurately, and rapidly from measured interferograms.
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Frikha H, Chaouache K, Abdessaied S, Elhattab I, Bousselmi S, Ksouri W, Aletti P, Besbes M, Abdelmajid K, Jerbi G. Implementation of a Radiation Therapy Center in Low and Middle-Income Countries. the Case of Collaborative Project to Implement Modern Radiotherapy Center in Tunisia. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1483] [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: 10/26/2022]
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Cherni N, Jamoussi A, Merhebène T, Ayed S, Ben Khelil J, Besbes M. RIFLE, AKIN et KDIGO en réanimation : quelle classification pour l’insuffisance rénale aiguë au cours du choc septique ? Nephrol Ther 2019. [DOI: 10.1016/j.nephro.2019.07.259] [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: 10/26/2022]
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Jamoussi A, Merhabene T, Neji H, Ayed K, Ben Khelil J, Besbes M. Hypertension artérielle pulmonaire au cours de la drépanocytose : complication aiguë ou chronique ? Méd Intensive Réa 2019. [DOI: 10.3166/rea-2019-0097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Introduction : Au cours de la drépanocytose (DPC), l’hypertension artérielle pulmonaire (HTAP) est fréquente et aggrave le pronostic. Son diagnostic précoce revêt un intérêt capital sur ce terrain.
Observations : Le premier cas est celui d’un patient avec HTAP chronique et retentissement fonctionnel respiratoire, suspectée à l’occasion d’un épisode aigu et confirmée à distance. Le second cas rapporte une HTAP aiguë au cours d’un syndrome thoracique aigu ; spontanément réversible après résolution de la crise.
Conclusion : L’HTAP découverte lors d’une exacerbation de la DPC peut être aiguë et réversible ou chronique et permanente. À distance de cet épisode aigu, une exploration de la fonction cardiaque droite est nécessaire pour étiqueter la forme clinique de l’HTAP et préconiser la surveillance adéquate.
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Lalanne P, Yan W, Gras A, Sauvan C, Hugonin JP, Besbes M, Demésy G, Truong MD, Gralak B, Zolla F, Nicolet A, Binkowski F, Zschiedrich L, Burger S, Zimmerling J, Remis R, Urbach P, Liu HT, Weiss T. Quasinormal mode solvers for resonators with dispersive materials. J Opt Soc Am A Opt Image Sci Vis 2019; 36:686-704. [PMID: 31044992 DOI: 10.1364/josaa.36.000686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 02/27/2019] [Indexed: 06/09/2023]
Abstract
Optical resonators are widely used in modern photonics. Their spectral response and temporal dynamics are fundamentally driven by their natural resonances, the so-called quasinormal modes (QNMs), with complex frequencies. For optical resonators made of dispersive materials, the QNM computation requires solving a nonlinear eigenvalue problem. This raises a difficulty that is only scarcely documented in the literature. We review our recent efforts for implementing efficient and accurate QNM solvers for computing and normalizing the QNMs of micro- and nanoresonators made of highly dispersive materials. We benchmark several methods for three geometries, a two-dimensional plasmonic crystal, a two-dimensional metal grating, and a three-dimensional nanopatch antenna on a metal substrate, with the perspective to elaborate standards for the computation of resonance modes.
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Bryche JF, Hamouda F, Besbes M, Gogol P, Moreau J, Lamy de la Chapelle M, Canva M, Bartenlian B. Experimental and numerical investigation of biosensors plasmonic substrates induced differences by e-beam, soft and hard UV-NIL fabrication techniques. Micro and Nano Engineering 2019. [DOI: 10.1016/j.mne.2018.11.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mahjoubi K, Ben Zid K, Zaidi C, Belaid A, Abidi R, Essadok A, Besbes M, Nasr C. Évaluation des erreurs de positionnement dans l’irradiation des cancers du cavum avec modulation d’intensité. Cancer Radiother 2018. [DOI: 10.1016/j.canrad.2018.07.048] [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: 11/17/2022]
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Belaïd A, Jmour O, Abidi R, Doghri R, Cherif A, Mahjoubi K, Yahiaoui S, Zaraa S, Yousfi A, Gargouri W, Bouguila H, Besbes M, Nasr C. Radiothérapie de contact des carcinomes conjonctivaux : à propos de 22 cas. Cancer Radiother 2018. [DOI: 10.1016/j.canrad.2018.07.122] [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: 11/28/2022]
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Jamoussi A, Ayed S, Ben Ismail K, Chtara K, Bouaziz M, Mokline A, Messaadi A, Merhebene T, Tilouche N, El Atrous S, Boussarsar M, Daly F, Benlakhel S, Fathallal I, Kouraichi N, El Hechmi YZ, Jerbi Z, Attigue R, Hamouda H, Ghadhoun H, El Ghord H, Ben Romdhane K, Khedher S, Allala R, Mateur H, Brahmi N, Ben Khelil J, Besbes M. The prevalence of healthcare-associated infection in medical intensive care units in Tunisia. Results of the multi-centre nosorea1 study. Tunis Med 2018; 96:731-736. [PMID: 30746666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
OBJECTIVES To determine the prevalence of Healthcare-Associated Infection (HAI) in medical Intensive Care Unit (ICU), risk factors for these infections and identify the predominant infecting organisms. METHODS A 1-day point-prevalence study within all medical ICUs in Tunisia, all patients occupying an ICU bed over a 48-hour period were included. Rates of HAI, resistance patterns of microbiological isolates and potential risk factors for HAI were recorded. RESULTS One hundred and three patients were collected from 15 Tunisian medical ICUs. HAI prevalence was 25.2% CI 95% [15-35].The most frequent HAIs were hospital acquired pneumonia in 19 cases (59%) and catheter related infection in 5 cases (15%). Independent factors associated with HAI occurrence were SAPSII score ≥ 33 with OR 1.047; CI 95% [1.015-1.077], p=0.003 and recent hospitalization with OR 4.14 CI 95% [1.235-13.889], p=0.021. Non-fermenting pathogens were the most frequent microorganisms reported in ICUs ecology, prior colonization and HAIs of the screened patients. CONCLUSION HAIs are frequent in medical ICUs in Tunisia, which emphasize the importance of specific measures for surveillance and infection control in critically ill patients. Implementing a national monitoring system of HAI should be a major priority of public health in Tunisia.
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Merhabene T, Ben Slimene A, Jamoussi A, Zayet S, Ayed S, Ben Khelil J, Besbes M. Pneumopathies communautaires virales admises en réanimation : expérience de 10 ans. Med Mal Infect 2018. [DOI: 10.1016/j.medmal.2018.04.326] [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: 11/16/2022]
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Ben Salem L, Essadok A, Saidani I, Mahdouani M, Benna M, Mahjoubi K, Besbes M, Benna F. [Experimental determination of correction factors of four detectors used in small field radiotherapy]. Cancer Radiother 2018; 22:45-51. [PMID: 29290555 DOI: 10.1016/j.canrad.2017.08.110] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 07/22/2017] [Accepted: 08/02/2017] [Indexed: 10/18/2022]
Abstract
PURPOSE The aim of this work is to determine experimentally the correction factors [Formula: see text] for four active commercial dosimeters: two microchambers and two diode detectors based on the output factor measured with radiochromic film for a radiotherapy linear accelerator equipped with circular cones. MATERIALS AND METHODS Initially, a radiochromic film dosimetry measurement protocol with an accuracy of 2% was developed to approach the "reference output factor". Afterwards, the corrective factors of four detectors were determined for two ionization chambers (PinPoint PTW 31016 3D, Micropoint Extradin A16) and two diodes (PTW T60017 Diode, PTW-60019 Micro-Diamond). These measurements were carried out under conical BrainLAB® collimators defining circular fields with diameters equal to 7.5mm, 10mm, 12.5mm, 15mm, 17.5mm, 20mm, 25mm, 30mm, 35mm and 45mm of a 6MV X-ray beam generated by the ClinaciX linear accelerator (Varian®). These factors are weakly dependent on the type of accelerator, whether the model and the collimation type. This allowed their comparisons with those published for the same type of detector and for an accelerator with the same index of beam quality. RESULTS The correction factors obtained experimentally were comparable in maximum deviation of 1.9% with published ones of the works using the same type of detector (mark and model) and an accelerator delivering the same beam quality for the same field size at the measurement point. CONCLUSION The measurement protocol using the EBT3 film, which was used as a passive dosimeter to determine the "reference output factor", was validated by comparing measured and published data of active detector correction factors.
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Affiliation(s)
- L Ben Salem
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie.
| | - A Essadok
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - I Saidani
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - M Mahdouani
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - M Benna
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - K Mahjoubi
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - M Besbes
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
| | - F Benna
- Unité de radiophysique, service de radiothérapie, institut Salah-Azaiz de Tunis, boulevard 9-Avril, 1006 Tunis, Tunisie
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Sassi A, Amroussi S, Besbes M, Aouni M, Skhiri F. Antioxidant and α-glucosidase activities and phytochemical constituents of Chrysanthoglossum trifurcatum (Desf.). ASIAN PAC J TROP MED 2018. [DOI: 10.4103/1995-7645.231469] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Abbes I, Abdelhak S, Abdelhedi C, Abid K, Abidi R, Acacha E, Achour S, Achour A, Adouni O, Afrit M, Ahlem A, Akik I, Akremi M, Aloui R, Aloulou S, Ammar N, Arem S, Athimni S, Attia L, Attia M, Ayadi M, Ayadi A, Ayadi K, Ayadi H, Ayadi L, Ayadi I, Ayari J, Azzouz H, Bacha D, Bahloul R, Bahri I, Bahri M, Bakir D, Balti M, Bargaoui H, Batti R, Bayar R, Bdioui Thabet A, Beji M, Bel Hadj Hassen S, Bel Haj Ali A, Belaid I, Belaid A, Beldjiilali Y, Belkacem O, Bellamlih O, Ben Abdallah W, Ben Abdallah M, Ben Abdellah H, Ben Abderrahmen S, Ben Ahmed S, Ben Ahmed K, Ben Ayache M, Ben Ayoub W, Ben Azaiz M, Ben Azouz M, Ben Daly A, Ben Dhia S, Ben Dhiab M, Ben Dhiab T, Ben Fatma L, Ben Ghachem D, Ben Hammadi S, Ben Hassen M, Ben Hassena R, Ben Hassouna J, Ben Kridis W, Ben Leila F, Ben Mahfoudh KH, Ben Mustapha N, Ben Nasr S, Ben Othman F, Ben Rejeb M, Ben Rekaya M, Ben Rhouma S, Ben Safta Z, Ben Safta I, Ben Said A, Ben Salah M, Ben Salah H, Ben Slama S, Ben Temime R, Ben Youssef Y, Ben Zid K, Benabdella H, Benasr S, Bengueddach A, Benna M, Benna F, Bergaoui H, Berrazaga Y, Besbes M, Bhiri H, Bibi M, Blel A, Bohli M, Bouali S, Bouaouina N, Bouassida K, Bouaziz H, Boubaker J, Boudaouara T, Boudaouara Z, Boudaouara O, Boughanmi F, Boughattas W, Boughizane S, Bouguila H, Bouhani M, Bouhlel B, Boujelbane N, Boujemaa M, Boulma R, Bouraoui S, Bouriga R, Bourmech M, Bousrih C, Boussen H, Boussen N, Bouzaien F, Bouzayene F, Brahem I, Briki R, Chaabene K, Chaabouni M, Chaari H, Chabchoub I, Chachia S, Chaker K, Chamlali M, Charfi L, Charfi M, Charfi S, Charradi H, Cheffai I, Chelly B, Chelly I, Chenguel A, Cherif A, Cherif O, Chiboub A, Chouchene A, Chraiet N, Daghfous A, Daldoul A, Daoud N, Daoud J, Daoud R, Daoud E, Debaibi M, Dhaouadi S, Dhief R, Dhouib F, Dimassi S, Djebbi A, Doghri R, Doghri Y, Doudech B, Dridi M, El Amine O, El Benna H, El Khal MC, Eladeb M, Elloumi M, Elmeddeb K, Enaceur F, Ennouri S, Essoussi M, Ezzairi F, Ezzine A, Faleh R, Fallah S, Faouzi N, Fathallah K, Fehri R, Feki J, Fekih M, Fendri S, Fessi Z, Fourati N, Fourati M, Frikha I, Frikha M, Gabsi A, Gadria S, Gamoudi A, Gargoura A, Gargouri W, Ghariani N, Ghazouani E, Ghorbal A, Ghorbel L, Ghorbel S, Ghozzi A, Glili A, Gmadh K, Goucha A, Gouiaa N, Gritli S, Guazzah K, Guebsi A, Guermazi Z, Guermazi F, Gueryani N, Guezguez M, Hacheni F, Hachicha M, Haddad A, Haddaoui A, Hadoussa M, Haj Mansour M, Hajjaji A, Hajji A, Hamdi A, Hamdi Y, Hammemi R, Haouet S, Hdiji A, Hechiche M, Hedfi M, Helali AJ, Henchiri H, Heni S, Hentati A, Herbegue K, Hidar S, Hlaf M, Hmida W, Hmida I, Hmida L, Hmila Ben Salem I, Hochlef M, Hsairi M, Jaffel H, Jaidane M, Jarraya H, Jebsi M, Jedidi M, Jlassi A, Jlassi H, Jmal H, Jmour O, Jouini M, Kabtni W, Kacem M, Kacem S, Kacem I, Kaid M, Kairi H, Kallel M, Kallel R, Kallel F, Kammoun H, Kamoun S, Kanoun Belajouza S, Karray W, Karrit S, Karrou M, Kchir N, Kdous S, Kehili H, Keskes H, Khairi H, Khalfallah MT, Khalifa MB, Khanfir A, Khanfir F, Khechine W, Khemiri S, Khiari H, Khlif A, Khouni H, Khrouf S, Kochbati L, Korbi I, Korbi A, Krir MW, Ksaier I, Ksantini R, Ksantini M, Ksantini F, Ktari K, Laabidi S, Laamouri B, Labidi A, Lahmar A, Lahouar R, Lamine O, Letaief F, Limaiem F, Limayem I, Limem S, Limem F, Loghmari A, M'ghirbi F, Maamouri F, Magherbi H, Mahjoub N, Mahjoub M, Mahjoubi K, Majdoub S, Makhlouf T, Makni A, Makni S, Mallat N, Manai MH, Mansouri H, Maoua M, Marghli I, Masmoudi T, Mathlouthi N, Meddeb K, Medini B, Mejri N, Merdessi A, Mesali C, Mezlini E, Mezlini A, Mezni E, Mghirbi F, Mhiri N, Mighri N, Mlika M, Mnejja W, Mnif H, Mokni M, Mokrani A, Mosbah F, Moujahed R, Mousli A, Moussa A, Mrad Dali K, Mrizak N, Msakni I, Mzabi S, Mzali R, Mzoughi Z, Naimi Z, Najjar S, Nakkouri R, Nasr C, Nasrallah D, Nasri M, Njim L, Noubigh GEF, Nouira Y, Nouri O, Omrani S, Osmane W, Ouanes Y, Ouanna N, Oubich F, Oumelreit Belamlih G, Rachdi H, Rafraf F, Rahal K, Raies H, Rammeh S, Rebaii N, Rekik W, Rekik H, Rhim MS, Rhim S, Rihab D, Rjiba R, Rziga T, Saad H, Saad A, Saadi M, Said N, Salah R, Sallemi N, Sassi A, Sassi K, Sassi Mahfoudh A, Sbika W, Sellami A, Serghini M, Sghaier S, Sh Zidi Y, Siala W, Slimane M, Slimani O, Soltani S, Souguir MK, Sridi A, Tabet Zatla A, Tajina D, Talbi G, Tbessi S, Tebra Mrad S, Temessek H, Tlili G, Toumi N, Toumi O, Toumia N, Tounsi H, Trigui E, Triki M, Triki A, Turki M, Werda I, Yahyaoui S, Yahyaoui Y, Yaich A, Yamouni M, Yazid D, Yousfi A, Zaghouani H, Zaied S, Zairi F, Zaraa S, Zehani A, Zenzri Y, Zidi A, Znaidi N, Zouari K, Zouari S, Zoukar O, Zribi A. Summaries of the papers of the 4th National Congress of the Tunisian Society of Medical Oncology attached to the 4th Maghreb Congress of Oncology. Tunis Med 2017; 95:859-964. [PMID: 29873056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Zayet S, Merhabene T, Jamoussi A, Ghariani A, Slim L, Khelil JB, Besbes M. Méningo-encéphalites infectieuses en milieu de réanimation. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.228] [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: 10/19/2022]
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Zayet S, Merhabene T, Jamoussi A, Ghariani A, Slim L, Khelil JB, Besbes M. Intérêt de la fibrinolyse intrapleurale dans le traitement des pleurésies purulentes. Med Mal Infect 2017. [DOI: 10.1016/j.medmal.2017.03.297] [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: 11/30/2022]
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Ben nejma A, Besbes M, Guérineau V, Touboul D, Ben jannet H, Hamza MA. Isolation and structure elucidation of acetylcholinesterase lipophilic lupeol derivatives inhibitors from the latex of the Tunisian Periploca laevigata. ARAB J CHEM 2017. [DOI: 10.1016/j.arabjc.2013.10.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Jamoussi A, Merhebene T, Khelil JB, Besbes M. Syndrome de détresse respiratoire aiguë (SDRA) dû à la grippe : quelles séquelles après la réanimation ? Rev Mal Respir 2017. [DOI: 10.1016/j.rmr.2016.10.356] [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: 10/20/2022]
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Besbes M, Ben Salem L, Assadok A, Saidani I, Mahdouani M, Mahjoubi H, Benna F. Détermination du facteur de diffusion du collimateur pour des faisceaux d’irradiation de petite dimension : étude comparative de différents types de mini-fantômes. Cancer Radiother 2016. [DOI: 10.1016/j.canrad.2016.08.089] [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: 10/21/2022]
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Dakhli M, Garrab K, Chemli S, Besbes M, Braham Y. Intoxication aux opiacés chez les enfants dans le Centre et Sud Tunisien. Toxicologie Analytique et Clinique 2016. [DOI: 10.1016/j.toxac.2016.05.044] [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: 12/01/2022]
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Jennewein S, Besbes M, Schilder NJ, Jenkins SD, Sauvan C, Ruostekoski J, Greffet JJ, Sortais YRP, Browaeys A. Coherent Scattering of Near-Resonant Light by a Dense Microscopic Cold Atomic Cloud. Phys Rev Lett 2016; 116:233601. [PMID: 27341230 DOI: 10.1103/physrevlett.116.233601] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 06/06/2023]
Abstract
We measure the coherent scattering of light by a cloud of laser-cooled atoms with a size comparable to the wavelength of light. By interfering a laser beam tuned near an atomic resonance with the field scattered by the atoms, we observe a resonance with a redshift, a broadening, and a saturation of the extinction for increasing atom numbers. We attribute these features to enhanced light-induced dipole-dipole interactions in a cold, dense atomic ensemble that result in a failure of standard predictions such as the "cooperative Lamb shift". The description of the atomic cloud by a mean-field model based on the Lorentz-Lorenz formula that ignores scattering events where light is scattered recurrently by the same atom and by a microscopic discrete dipole model that incorporates these effects lead to progressively closer agreement with the observations, despite remaining differences.
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Affiliation(s)
- S Jennewein
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - M Besbes
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - N J Schilder
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - S D Jenkins
- Mathematical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - C Sauvan
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - J Ruostekoski
- Mathematical Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - J-J Greffet
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - Y R P Sortais
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
| | - A Browaeys
- Laboratoire Charles Fabry, Institut d'Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France
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Ghribi L, Ben Nejma A, Besbes M, Harzalla-Skhiri F, Flamini G, Ben Jannet H. Chemical Composition, Cytotoxic and Antibacterial Activities of the Essential Oil from the Tunisian Ononis angustissima L. (Fabaceae). J Oleo Sci 2016; 65:339-45. [PMID: 26972463 DOI: 10.5650/jos.ess15242] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The chemical composition, cytotoxic and antibacterial activities of the hydrodistilled essential oil of the aerial parts of Ononis angustissima from south Tunisia has been evaluated. The oil yield was 0.04% (w/w). The chemical composition, determined by GC and GC-MS is reported for the first time. Forty-five components, accounting for 93.7% of the total oil have been identified. The oil was characterized by a high proportion of oxygenated sesquiterpenes (33.2%), followed by sesquiterpene hydrocarbons (6.3%) and apocarotenoids (10.3%). The main components of the oil were α-eudesmol (22.4%), 2-tridecanone (9.3%) and acetophenone (7.4%). The essential oil was tested for its possible cytotoxic activity towards the human cervical cell line HeLa using the MTT assay and the antibacterial activity against Pseudomonas aeruginosa, Escherichia coli, Enterococcus faecalis, Staphylococcus aureus and the clinical strain Acinetobacter sp. This oil exerted a cytotoxic activity with an IC50 of 0.53 ± 0.02 mg/mL and a significant antibacterial effect against P. aeruginosa and E. faecalis.
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Affiliation(s)
- Lotfi Ghribi
- Laboratoire de Chimie Hétérocyclique, Produit Naturels et Réactivité. Equipe : Chimie Médicinale et Produits Naturels, Département de Chimie, Faculté des Sciences de Monastir, Université de Monastir
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Jolliet P, Besbes L, Abroug F, Ben Kheli J, Besbes M, Arnal JM, Daviaud F, Chiche JD, Lortat-Jacob B, Diehl JL, Lerolle N, Mercat A, Razazi K, Brun-Buisson C, Bertini S, Corrado A, Texereau J, Brochard L. An international phase iii randomised trial on the efficacy of helium/oxygen during spontaneous breathing and intermittent non-invasive ventilation for severe exacerbations of chronic obstructive pulmonary disease (the E.C.H.O.ICUtrial). Intensive Care Med Exp 2015. [PMCID: PMC4798073 DOI: 10.1186/2197-425x-3-s1-a422] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Bougot-Robin K, Hugonin JP, Besbes M, Benisty H. Broad working bandwidth and "endlessly" single-mode guidance within hybrid silicon photonics. Opt Lett 2015; 40:3512-3515. [PMID: 26258345 DOI: 10.1364/ol.40.003512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The successes of nonlinear photonics and hybrid silicon photonics with a growing variety of functional materials entail ever-enlarging bandwidths. It is best exemplified by parametric comb frequency generation. Such operation challenges the dielectric channel waveguide as the basis for guidance, because of the adverse advent of higher order modes at short wavelengths. Surprisingly, the popular mechanism of endlessly single-mode guidance [Opt. Lett.22, 961 (1997).] operating in photonic crystal fibers has not been transposed within silicon photonics yet. We outline here the strategy and potential of this approach within planar and hybrid silicon photonics, whereby in-plane and vertical confinement are shown to be amenable to near-single-mode behavior in the typical silicon band, i.e., λ=1.1 μm to ∼5 μm.
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Marzouk M, Boukadida A, Chouchene I, Ferjani A, Hannachi N, Besbes M, Bouchoucha S, Boukadida J. Analyse des cas de légionellose grave hospitalisés dans les services de réanimation en Tunisie. ACTA ACUST UNITED AC 2015; 108:191-6. [DOI: 10.1007/s13149-014-0414-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 10/30/2014] [Indexed: 11/29/2022]
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Zghab I, Trimeche B, Besbes M, Touboul D, Martin MT, Jannet HB. Synthesis and spectral studies of biologically active organophosphorus derivatives of substituted 4-(2-hydroxyphenylamino)-2H-chromen-2-one. Med Chem Res 2014. [DOI: 10.1007/s00044-014-1291-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Benabdennebi A, Oueslati H, Llanas D, Cheve M, Besbes M, Lefkopoulos D, Deutsch É, Benadjaoud M, Rivera S, de Vathaire F. Évaluation des doses reçues dans les organes hors ou partiellement dans le volume cible d’une irradiation partielle et accélérée du sein par RapidArc™. Cancer Radiother 2014. [DOI: 10.1016/j.canrad.2014.07.092] [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: 11/25/2022]
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Ben Abdennebi A, Auzac G, Chavaudra J, Besbes M, Llanas D, Allodji R, de Vathaire F, Diall I, Blanchard P. Comparaison entre RCMI et arcthérapie dynamique dans et en dehors du volume irradié dans le cas du cancer de la prostate. Cancer Radiother 2013. [DOI: 10.1016/j.canrad.2013.07.093] [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: 11/29/2022]
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Boukhari N, Taleb-Senouci D, Chabane FZ, Besbes M, Lamri-Senhadji MY. [Fish by-products oil corrects dyslipidemia, improves reverse cholesterol transport and stimulates paraoxonase-1 activity in obese rat]. Ann Cardiol Angeiol (Paris) 2013; 62:149-154. [PMID: 23721985 DOI: 10.1016/j.ancard.2013.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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] [Received: 03/14/2013] [Accepted: 04/01/2013] [Indexed: 06/02/2023]
Abstract
AIM OF THE STUDY To valorize fish by-products oil by investigating its effects on dyslipidemia, hyperglycemia, reverse cholesterol transport and paraoxonase-1 activity in obese rat. METHODS Sixteen male Wistar rats were fed a high fat diet. At 400 ± 10 g, obese rats were randomly divided into two groups: the first received 20% of sardine by-products oil and the second 20% of the edible portion oil. At d28, glycemia and serum lipids concentrations were estimated. High density lipoproteins (HDL2 and HDL3) were separated and their contents and composition in lipids and apolipoproteins were analyzed. Lecithin: cholesterol acyltransferase and paraoxonase-1 activities were assessed. RESULTS In group which consumed sardine by-products oil, serum cholesterol and triacylglycerols were reduced (-8% and -36%, respectively). However, glycemia was similar. HDL3-phospholipids, HDL3-unesterified cholesterol and HDL3-apolipoproteins were decreased by 56%, 10% and 12%, respectively. Lecithin: cholesterol acyltransferase activity was increased by 35% and the content of HDL2-cholesteryl esters was elevated by 12%. Serum paraoxonase-1 activity was increased by 25%. CONCLUSION In obese rat, sardine by-products oil may have a protective effect against cardiovascular risk by improving the anti-atherogenic metabolic pathway of cholesterol and triacylglycerols. This anti-atherogenic action is particularly enhanced by the increase in paraoxonase-1 activity which protects lipoproteins from oxidation.
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Affiliation(s)
- N Boukhari
- Laboratoire de nutrition clinique et métabolique (LNCM), faculté des sciences, département de biologie, université d'Oran, BP 1524, El M'Nouer, 31100 Oran, Algérie
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Ben Abdennebi A, Auzac G, Chavaudra J, Besbes M, Llanas D, Allodji R, Tao Y, Blanchard P, Veres A, Bridier A, Lefkopoulos D, de Vathaire F, Diallo I. Comparison of dose distribution between intensity modulated radiation therapy and dynamic arc therapy in and out-of-field for prostate cancer treatment plan. Phys Med 2013. [DOI: 10.1016/j.ejmp.2013.08.121] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Ben-Mustapha I, Belkhouja K, Kheder S, Mekki N, Ben Romdhane K, Hantous S, Ben Khelil J, Slim LS, Barbouche MR, Besbes M. Coinfection with Mycobacterium tuberculosis and Pneumocystis Jirovecii in immunocompetent young woman. Arch Inst Pasteur Tunis 2013; 90:55-60. [PMID: 26012211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Pneumocystis pneumonia is a severe opportunistic infection in immunocompromised patients, caused by Pneumocystis jirovecii (P. jirovecii). The co-infection with community-acquired P. jirovecii and Mycobacterium tuberculosis (M. tuberculosis) is exceptionally described in non immunocompromised patients. We herein report the case of a young woman, with no medical history, who developed an acute respiratory failure due to P. jirovecii pneumonia associated with miliary tuberculosis. An extensive immunological investigation ruled out any acquired or primary immunodeficiency, suggesting that she was most likely immunocompetent. This report shows that such infections are not restricted to immunocompromised hosts. Moreover, it is tempting to speculate that the development of M. tuberculosis infection in this patient could be a risk factor for transition from colonization status of respiratory tract by P. jirovecii to pneumocystosis.
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Affiliation(s)
- I Ben-Mustapha
- Laboratoire de Cyto-Immunologie, LR11IPT02, Institut Pasteur de Tunis, Tunis, Tunisia. El-Mana, Tunisia
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Abdennebi AB, Chavaudra J, Besbes M, Veres C, Girinsky T, Bridier A, Lefkopoulos D, de Vathaire F, Diallo I. Évaluation de dose−volume pour les organes à risque et pour le remaining volume at risk (RVR) en radiothérapie externe. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.017] [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: 11/25/2022]
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Kochbati L, Essaidi I, Labidi M, Yahiaoui S, Ben Salem L, Nasr C, Messai T, Gargouri W, Besbes M, Maalej M. Évaluation des doses de tolérance des organes à risque après radiothérapie bidimensionnelle des cancers du nasopharynx classés T4 chez les sujets jeunes. Cancer Radiother 2012. [DOI: 10.1016/j.canrad.2012.07.093] [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: 10/27/2022]
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Besbes M, Omri A, Cheraif I, Daami M, Jannet HB, Mastouri M, Aouni M, Selmi B. Chemical composition and antimicrobial activity of essential oils from Scabiosa arenaria Forssk: growing wild in Tunisia. Chem Biodivers 2012; 9:829-39. [PMID: 22492499 DOI: 10.1002/cbdv.201100191] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The essential oils isolated from three organs, i.e., fruits, stems and leaves, and flowers, of the endemic North African plant Scabiosa arenaria Forssk. were screened for their chemical composition, as well as their possible antibacterial, anticandidal, and antifungal properties. According to the GC-FID and GC/MS analyses, 61 (99.26% of the total oil composition), 79 (98.43%), and 51 compounds (99.9%) were identified in the three oils, respectively. While α-thujone (34.39%), camphor (17.48%), and β-thujone (15.29%) constituted the major compounds of the fruit oil, chrysanthenone (23.43%), together with camphor (12.98%) and α-thujone (10.7%), were the main constituents of the stem and leaf oil. In the case of the flower oil, also chrysanthenone (38.52%), camphor (11.75%), and α-thujone (9.5%) were identified as the major compounds. Furthermore, the isolated oils were tested against 16 Gram-positive and Gram-negative bacteria, four Candida species, and nine phytopathogenic fungal strains. It was found that the oils exhibited interesting antibacterial and anticandidal activities, comparable to those of thymol, which was used as positive control, but no activity against the phytopathogenic fungal strains was observed.
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Affiliation(s)
- Malek Besbes
- Laboratoire des Maladies Transmissibles et des Substances Biologiquement Actives, Monastir, Tunisie
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Kochbati L, Yahyaoui Y, El Benna H, Nasr C, Messaï T, Hentati D, Gargouri W, Besbes M, Maalej M. La mobilité des cordes vocales est-elle un facteur pronostique dans les cancers glottiques ? Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.097] [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: 10/17/2022]
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Kochbati L, Bouzid N, Saïdi I, Nasr C, Messaï T, Hentati D, Gargouri W, Besbes M, Maalej M. Impact du timing de la curiethérapie dans le traitement du cancer du col utérin. Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.199] [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: 11/30/2022]
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Saïd F, Abdallah M, Larbi T, Hamzaoui S, Ben Romdhane K, Harmel A, Ennafaa M, Bouslama K, Besbes M, M’Rad S. Pseudovascularite systémique révélant un phéochromocytome. Rev Med Interne 2010. [DOI: 10.1016/j.revmed.2010.10.329] [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: 10/18/2022]
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Maksymov IS, Besbes M, Hugonin JP, Yang J, Beveratos A, Sagnes I, Robert-Philip I, Lalanne P. Metal-coated nanocylinder cavity for broadband nonclassical light emission. Phys Rev Lett 2010; 105:180502. [PMID: 21231093 DOI: 10.1103/physrevlett.105.180502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2010] [Indexed: 05/30/2023]
Abstract
A novel metal-coated nanocylinder-cavity architecture fully compatible with III-V GaInAs technology and benefiting from a broad spectral range enhancement of the local density of states is proposed as an integrated source of nonclassical light. Because of a judicious selection of the mode volume, the cavity combines good collection efficiency (≈45%), large Purcell factors (≈15) over a 80 nm spectral range, and a low sensitivity to inevitable spatial mismatches between the single emitter and the cavity mode. This represents a decisive step towards the implementation of reliable solid-state devices for the generation of entangled photon pairs at infrared wavelengths.
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Affiliation(s)
- I S Maksymov
- Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Univ. Paris-Sud, Campus Polytechnique, Palaiseau, France
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Besbes M, Mahjoubi H, Kochbati L, Ben Abdennabi A, Farhat L, Abdessaied S, Salem L, Frikha H, Nasr Ben Ammar C, Hentati D, Gargouri W, Messai T, Benna F, Maalej M. [In vivo dosimetry study of semi-conductors EPD-20 in total body irradiation technique]. Cancer Radiother 2009; 14:29-33. [PMID: 19897396 DOI: 10.1016/j.canrad.2009.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2009] [Revised: 04/14/2009] [Accepted: 09/09/2009] [Indexed: 11/29/2022]
Abstract
PURPOSE The objective of this work was the study of in vivo dosimetry performed in a series of 54 patients receiving total body irradiation (TBI) at the Salah-Azaiz Institute of Tunis since 2004. In vivo dosimetry measurements were compared to analytically calculated doses from monitor units delivered. PATIENTS AND METHOD The irradiation was conducted by a linear accelerator (Clinac 1800, Varian, Palo Alto, USA) using nominal X-rays energies of 6 MV and 18 MV, depending on the thickness of the patient at the abdomen. The dose was measured by semi-conductors p-type EPD-20. These diodes were calibrated in advance with an ionization chamber "PTW Farmer" type of 0.6cm(3) and were placed on the surface of plexiglas phantom in the same TBI conditions. A study of dosimetric characteristics of semi-conductors EPD-20 was carried out as a function of beam direction and temperature. Afterwards, we conducted a comparative analysis of doses measured using these detectors during irradiation to those calculated retrospectively from monitor units delivered to each patient conditioned by TBI. RESULTS Experience showed that semi-conductors are sensitive to the angle of beam radiation (0-90 degrees ) and the temperature (22-40 degrees C). The maximum variation is respectively 5 and 7%, but in our irradiation conditions these correction factors are less than 1%. The analysis of the results of the in vivo dosimetry had shown that the ratio of the average measured doses and analytically calculated doses at the abdomen, mediastina, right lung and head are 1.005, 1.007, 1.0135 and 1.008 with a standard deviation "type A" respectively of 3.04, 2.37, 7.09 et 4.15%. CONCLUSION In vivo dosimetry by semi-conductors is in perfect agreement with dosimetry by calculation. However, in vivo dosimetry using semiconductors is the only technique that can reflect the dose actually received instantly by the patient during TBI given the many factors that calculation can not take into account: patient and organs motions and the heterogeneity of the targets.
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Affiliation(s)
- M Besbes
- Institut Salah-Azaiz, Tunis, Tunisie.
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Farhat L, Besbes M, Bridier A, Kaffel F, Daoud J. [Quality control of dosing delivered by in vivo measurements for head and neck radiotherapy]. Cancer Radiother 2009; 14:69-73. [PMID: 19695937 DOI: 10.1016/j.canrad.2009.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 04/15/2009] [Accepted: 05/02/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE Measurement of absorbed dose in target volume is widely considered to be an important tool for quality assurance in external radiotherapy. The aims of this work were to measure the entrance dose for patient treated for head and neck tumors and to compare this measured dose with the dose calculated. PATIENTS AND METHODS Twenty patients were evaluated. Initially, the measurements were performed on a polystyrene phantom in order to calibrate diodes in terms of entrance dose and to determinate appropriate correction factors. In vivo entrance dosimetry check was performed for these patients treated for head and neck tumors in (60)Co gamma-rays. RESULTS For the entrance dose evaluation over 100 field measurements, the mean deviation between the measured dose and the calculated dose was equal to 0.12% and the standard deviation was 1.84%. The deviation was less than 3% in 95% of measurements. Large deviation (more than 5%) was observed in one case. CONCLUSION Simple in vivo dose measurements are an additional safeguard against major set-up errors and calculation or transcription errors that were missed during pretreatment chart check.
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Affiliation(s)
- L Farhat
- CHU Habib-Bourguiba, Sfax, Tunisie.
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Frikha H, Chaari N, Nasr C, Bouguila H, Chebbi A, Bhouri L, Hentati D, Kochbati L, Besbes M, Rifi H, Oubiche F, Ayed S, Maalej M. Place de la radiothérapie dans le traitement du rétinoblastome : à propos de 40 cas. Cancer Radiother 2009; 13:30-6. [DOI: 10.1016/j.canrad.2008.08.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2007] [Revised: 07/10/2008] [Accepted: 08/03/2008] [Indexed: 10/21/2022]
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