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Journal of Environmental Sciences 2012年第3期24卷 479-487页

作者： Kais Elghniji olfa hentati Najwa Mlaik Ayman Mahfoudh Mohamed Ksibi University of Sfax Laboratoire EauEnergie et Environnement ENISB.P 11733038 SfaxTunisia Institut Supe'rieur de Biotechnologie de Sfax B.P 1175 3038 SfaxTunisia

A series of phosphorus-modified titanium dioxide samples with varying P/Ti atomic ratio were conveniently prepared via a conventional solgel route. The effects of phosphorus content and calcination temperature on the crystalline structure, grain growth, surface area, and the photocatalytic activity of P-modified TiO2 were investigated. The XRD results showed that P species slow down the particle growth of anatase and increase the anatase-to-rutile phase transformation temperature to more than 900°C. Kinetic studies on the P-modified TiO2 to degraded 4-chlorophenol had found that the TP5500 prepared by adopting a P/Ti atomic ratio equal to 0.05 and calcined at 500°C had an apparent rate constant equal to 0.0075 min 1, which is superior to the performance of a commercial photocatalyst Degussa P25 Kapp = 0.0045 min 1 and of unmodified TiO2 （TP0500） Kapp = 0.0022 min 1. From HPLC analyses, various hydroxylated intermediates formed during oxidation had been identified, including hydroquinone （HQ）, benzoquinone （BQ） and （4CC） 4-chlorocatechol as main products. Phytotoxicity was assessed before and after irradiation against seed germination of tomato （Lycopersicon esculentum） whereas acute toxicity was assessed by using Folsomia candida as the test organism. Intermediates products were all less toxic than 4-chlorophenol and a significant removal of the overall toxicity was accomplished

关键词： P-modified TiO2 photocatalyst 4-chlorophenol acute toxicity germination

Polysaccharides from the Green Alga Ulva lactuca Improve Antioxidant Balance and Bone Mineral Density in Diabetic Rats

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Biomedical and Environmental Sciences 2021年第8期34卷 637-640页

作者： Sahla Belhadj Manel Gargouri Giulia Guerriero olfa hentati UFR Sciences University of BourgogneBoulevard Gabriel21000DijonFrance Laboratoire Génie de l'Environnement et Ecotechnologie(GEET-LR16ES19 Ecole Nationale d'Ingénieurs de Sfax(ENIS)Universitéde SfaxRoute de SoukraSfaxTunisie Institute of Technology University of BrestBrestFrance Department of Biology University of Naples FedericoⅡComplesso Universitario di Monte S.AngeloNaplesItaly Interdepartmental Research Center for Environment University of Naples FedericoⅡNaplesItaly Institut Supérieur de Biotechnologie de Sfax Universitéde SfaxRoute de SoukraSfaxTunisie

Diabetes mellitus(DM),the 10th leading cause of death worldwide,is a major and growing public health problem estimated to affect more than 578 million people in 2030 and 700 million people in 2045[1].In diabetic animals,protein glycation and glucose autoxidation generate free radicals,which cause lipid ***,reactive oxygen species(ROS)can quickly accumulate,decrease antioxidant activity,and cause deterioration of kidney and liver function.A disrupted redox balance in cells also damages crucial biomolecules such as deoxyribonucleic acid(DNA),proteins and *** stress(OS)is elevated in diabetes mellitus and may be a major factor in the development and evolution of the typical long-term pathophysiology of diabetes and its associated complications[2].

关键词： Antioxidant peroxidation elevated

Predictive Control Based on Fuzzy Supervisor for PWARX Hybrid Model

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International Journal of Automation and computing 2019年第5期16卷 683-695页

作者： olfa Yahya Zeineb Lassoued Kamel Abderrahim Numerical Control of Industrial Processes National Engineering School of Gabes University of Gabes

In this paper, the problem of hybrid model predictive control(HMPC) strategy based on fuzzy supervisor for piecewise autoregressive with exogenous input(PWARX) models is addressed. We first represent the nonlinear behavior of the system with a PWARX model. Then, we transform the obtained PWARX model into a mixed logical dynamic(MLD) model in order to apply the proposed predictive control which is able to stabilize such systems along desired reference trajectories while satisfying operating ***, we propose to introduce a fuzzy supervisor allowing the readjustment of the HMPC tuning parameters in order to maintain the desired performance. Simulation and experimental results are presented to illustrate the effectiveness of the proposed approach.

关键词： Nonlinear control hybrid systems mixed logical dynamic(MLD) model predictive control fuzzy supervisor

Combining RUSLE model and the vegetation health index to unravel the relationship between soil erosion and droughts in southeastern Tunisia

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Journal of Arid Land 2023年第11期15卷 1269-1289页

作者： olfa TERWAYET BAYOULI ZHANG Wanchang Houssem TERWAYET BAYOULI Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences Beijing 100049China National Agronomic Institute of Tunisia(INAT) Tunis 1082Tunisia

Droughts and soil erosion are among the most prominent climatic driven hazards in drylands,leading to detrimental environmental impacts,such as degraded lands,deteriorated ecosystem services and biodiversity,and increased greenhouse gas *** response to the current lack of studies combining drought conditions and soil erosion processes,in this study,we developed a comprehensive Geographic Information System(GIS)-based approach to assess soil erosion and droughts,thereby revealing the relationship between soil erosion and droughts under an arid *** vegetation condition index(VCI)and temperature condition index(TCI)derived respectively from the enhanced vegetation index(EVI)MOD13A2 and land surface temperature(LST)MOD11A2 products were combined to generate the vegetation health index(VHI).The VHI has been conceived as an efficient tool to monitor droughts in the Negueb watershed,southeastern *** revised universal soil loss equation(RUSLE)model was applied to quantitatively estimate soil *** relationship between soil erosion and droughts was investigated through Pearson *** exhibited that the Negueb watershed experienced recurrent mild to extreme drought during 2000–*** average soil erosion rate was determined to be 1.8 t/(hm2•a).The mountainous western part of the watershed was the most vulnerable not only to soil erosion but also to *** slope length and steepness factor was shown to be the most significant controlling parameter driving soil *** relationship between droughts and soil erosion had a positive correlation(r=0.3);however,the correlation was highly varied spatially across the *** was linked to soil erosion in the Negueb *** current study provides insight for natural disaster risk assessment,land managers,and stake-holders to apply appropriate management measures to promote sustainable development goals in fragile environments.

关键词： droughts soil erosion vegetation health index(VHI) revised universal soil loss equation(RUSLE)model southeastern Tunisia

A Donsker Delta Functional Approach to Optimal Insider Control and Applications to Finance

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Communications in Mathematics and Statistics 2015年第3期3卷 365-421页

作者： olfa Draouil BerntФksendal Department of Mathematics University of Tunis El ManarTunisTunisia Department of Mathematics University of OsloP.O.Box 1053Blindern0316 OsloNorway Norwegian School of Economics(NHH) Helleveien 305045 BergenNorway

We study optimal insider control problems,i.e.,optimal control problems of stochastic systemswhere the controller at any time t,in addition to knowledge about the history of the system up to this time,also has additional information related to a future value of the *** this puts the associated controlled systems outside the context of semimartingales,we apply anticipative white noise analysis,including forward integration and Hida-Malliavin calculus to study the *** this with Donsker delta functionals,we transform the insider control problem into a classical(but parametrised)adapted control system,albeit with a non-classical performance *** establish a sufficient and a necessary maximum principle for such *** we apply the results to obtain explicit solutions for some optimal insider portfolio problems in financial markets described by Itô-Lévy ***,in the Appendix,we give a brief survey of the concepts and results we need from the theory of white noise,forward integrals and Hida-Malliavin calculus.

关键词： Optimal inside information control Hida-Malliavin calculus Donsker delta functional Anticipative stochastic calculus BSDE Optimal insider portfolio

Analysis of Genetic Diversity and Relationships in a Tunisian Fig （Ficus carica） Germplasm Collection by Random Amplified Microsatellite Polymorphisms

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Journal of Integrative Plant Biology 2007年第3期49卷 386-391页

作者： Khaled Chatti olfa Saddoud Amel Salhi-Hannachi Messaoud Mars Mohamed Marrakchi Mokhtar Trifi Laboratory of Molecular Genetics Immunology and Biotechnology Faculty of Sciences Campus University 2092 EI Manar Tunis Tunisia High Institute of Breeding and Horticulture 4042 Chott Mariem Sousse Tunisia

The random amplified mirosatellite polymorphism method was performed in a set of Tunisian fig landraces using eighteen primer combinations. A total of sixty three random amplified microsatellite polymorphism （RAMPO） markers were scored and used either to assess the genetic diversity in these cultivars or to detect cases of mislabeling. Opportunely, data proved that the designed procedure constitutes an attractive and fast method with low costs and prevents radio exposure. As a result, we have identified the primer combinations that are the most efficient to detect genetic polymorphism in this crop. Therefore, the derived unweighted pair-group method with arithmetic averages （UPGMA） dendrogram illustrates the genetic divergence among the landraces studied and exhibits a typically continuous variation. Moreover, no evident correlation between the sexes of trees was observed. In addition, using these markers, discrimination between landraces has been achieved. Thus, random amplified mirosatellite polymor- phism is proved to be powerful for characterizing the local fig germplasm.

关键词： collection Ficus carica genetic diversity germplasm random amplified microsatellite polymorphism Tunisia

Chemical composition of Rosmarinus and Lavandula essential oils and their insecticidal effects on Orgyia trigotephras(Lepidoptera,Lymantriidae)

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Asian Pacific Journal of Tropical Medicine 2015年第2期8卷 98-103页

作者： Ben Slimane Badreddine Ezzine olfa Dhahri Samir Chograni Hnia Ben Jamaa Mohamed Lahbib Institut Superieur des Sciences et Technologies de l'Environnement de Borj-Cédria B.P.1003Hammam-Lif 2050-Tunisia Institut National de Recherche en Génie Rural Eaux et ForêtsTunis.Tunisia Institut National des Sciences Appliquees et Technologiques.Tunis.Tunisia

Objective:To evaluate toxic activities of essential oils obtained from Rosmarinus officinalis and Lavandula stoechas against the fourth larval instars of Orgyia ***:A total of 1 200 larvae were divided into three groups Ⅰ,Ⅱ,Ⅲ.Group Ⅰ was to investigate the effect of extracted essential oils from these aromatic plants as gastric *** thuringiensis and ethanol were used as control *** Ⅱ was used as contact action and Group Ⅲ was used as fumigant *** and ethanol were used as control *** the three experiments,the effect of essential oils on larvae was ***:The chemical composition of essential oils from two medicinal plants was determined and,their insecticidal effects on the fourth larval slate of Orgyia trigotephras were *** two simples presented an insecticidal activity,nevertheless Rosmarinus officinalis essential oil was less efficient compared to Lavandula stoechas one are ***:The relationship between the chemical composition and the biologieal activities is confirmed by the present *** the potential uses of these essential oils as bioinsecticides can he considered as an alternative to the use of synthetic products.

关键词： Rosmarinus Lavandula Orgyia trigotephras Essential oils Insect control

AI-Based Helmet Violation Detection for Traffic Management System

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Computer Modeling in Engineering & Sciences 2024年第10期141卷 733-749页

作者： Yahia Said YahyaAlassaf Refka Ghodhbani Yazan Ahmad Alsariera Taoufik Saidani olfa Ben Rhaiem Mohamad Khaled Makhdoum Manel Hleili Department of Electrical Engineering College of EngineeringNorthern Border UniversityArar91431Saudi Arabia Department of Civil Engineering College of EngineeringNorthern Border UniversityArar91431Saudi Arabia Faculty of Computing and Information Technology Northern Border UniversityRafha91911Saudi Arabia College of Science Northern Border UniversityArar91431Saudi Arabia Department of Mathematics Faculty of Sciences of TabukUniversity of TabukTabuk71491Saudi Arabia

Enhancing road safety globally is imperative,especially given the significant portion of traffic-related fatalities attributed to motorcycle accidents resulting from non-compliance with helmet *** the critical role of helmets in rider protection,this paper presents an innovative approach to helmet violation detection using deep learning *** primary innovation involves the adaptation of the PerspectiveNet architecture,transitioning from the original Res2Net to the more efficient EfficientNet v2 backbone,aimed at bolstering detection *** rigorous optimization techniques and extensive experimentation utilizing the India driving dataset(IDD)for training and validation,the system demonstrates exceptional performance,achieving an impressive detection accuracy of 95.2%,surpassing existing ***,the optimized PerspectiveNet model showcases reduced computational complexity,marking a significant stride in real-time helmet violation detection for enhanced traffic management and road safety measures.

关键词： Non-helmet use detection traffic violation safety deep learning optimized PerspectiveNet

Combining fluids and vasopressors:A magic potion?

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Journal of Intensive Medicine 2022年第1期2卷 3-7页

作者： olfa Hamzaoui Department of Intensive Care Hôpital Antoine BéclèreUniversity Paris-SaclayClamart 92141France

Early detection and prompt reversal of sepsis-induced tissue hypoperfusion are key elements while treating pa-tients with septic *** administration is widely accepted as the first-line therapy followed by vasopressor use in persistently hypotensive patients or in those with insufficient arterial pressure to ensure adequate tissue *** evidence suggests a beneficial effect of combining fluids with vasopressors in the early phase of *** with fluids alone,combining fluids and vasopressors increases mean systemic pressure and venous return and corrects hypotension *** approach also limits fluid overload,which is an independent factor of poor outcomes in *** produces less hemodilution than fluids *** a consequence of these effects,combined treatment may improve outcomes in septic shock patients.

关键词： Fluid management Norepinephrine Septic shock

Systematic approach to select lactic acid bacteria from spontaneously fermented milk able to fight Listeria monocytogenes and Staphylococcus aureus

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Food Bioscience 2023年第1期51卷 656-668页

作者： Wafa Mkadem Khaoula Belguith olfa Oussaief Halima ElHatmi Valentina Indio Federica Savini Alessandra De Cesare Nourhene Boudhrioua Laboratory of Physiopathology Alimentation and Biomolecules(LR17ES03)Higher Institute of Biotechnology Sidi ThabetUniversity of MannoubaBP-662020ArianaTunisia Livestock and Wildlife Laboratory Arid Lands Institute of MedenineUniversity of Gabes4119MedenineTunisia Food Department Higher Institute of Applied Biology of MedenineUniversity of GabesMedenineTunisia Department of Veterinary Medical Sciences Alma Mater Studiorum University of Bolognavia Tolara di Sopra 5040064Ozzano dell’Emilia(BO)Italy

The aim of this study was to present a systematic approach to select lactic acid bacteria strains to be added in food products and with antimicrobial properties against Listeria monocytogenes and Staphylococcus aureus.A total of 73 lactic acid bacteria was selected and tested for their antimicrobial activity against the target pathogens.A subgroup of 44 isolates was selected applying the Principal Component Analysis and tested for co-aggregation and inhibition of biofilm forming ability against the two target *** on the latter properties and Heat Map Analysis,10 strains were submitted to whole genome sequencing to achieve the species identification and explore the presence of genes coding virulence factors and for *** application of the systematic approach presented in this study resulted in the final selection of one Lactobacillus paracasei and four Lactobacillus fermentum strains promising as strains to be added in food products.

关键词： Fermented milk Lactic acid bacteria Foodborne pathogens Mathematical approach Next generation sequencing