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Assessment of Heavy Metals Content in Sewage Discharges from Health Structure in Mauritania

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Journal of Pharmacy and Pharmacology 2022年第6期10卷 190-194页

作者： mohamed bouna ammar Brahim Ahmed Dick Yahya Maham Ould Sidi Hanan Deih Hana Youssef Learoussy Med Abderrahmane Sanhoury Vadly Sadegh mohamed Fekhaoui Geo-biodiversity and Natural Patrimony Laboratory Scientific InstituteMohamed V UniversityRabatMorocco Research Unit of the Water PollutionEnvironmentFSTUniversity of Nouakchott Al-AasryaMauritania National Laboratory for the Quality Control of Medicines(LNCQM) NouakchottMauritania Laboratory of Bioactive Molecules FSTSidi Mohamed Ben Abdellah UniversityFezMorocco Materials Chemistry Research Unit Department of ChemistryFSTUniversity of Nouakchott Al-AasryaMauritania Central Purchasing Center for Medicines Medical Equipment and Consumables

This study was carried to assess the quality of liquid waste produced by the Nouakchott Friendship Hospital in Mauritania,the aim is to quantify different heavy metals obtained from discharge of the hospital waste six heavy metals(arsenic,lead,cobalt,chromium,cadmium and copper)were object of *** was carried using inductively coupled plasma-optical emission spectrometry(ICP-OES)method and the standards used are those of the *** average content of heavy metals in different samples is different:Arsenic(4.625μg/L),Lead(3.800μg/L),Cyanide(0.05μg/L),Chromium(0.013μg/L),Cadmium(

关键词： Heavy metals waste ICP-OES pollutants health risk

Entropy generation of MHD natural convection heat transfer in a heated incinerator using hybrid-nanoliquid

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Propulsion and Power Research 2021年第2期10卷 143-154页

作者： Bouchmel Mliki mohamed ammar Abbassi Materials Energy and Renewable EnergiesFaculty of Sciences of GafsaB.P.19ZarrougGafsa2112Tunisia

The present study explores magnetic hybrid-nanoliquid(Al_(2)O_(3)-Cu/H_(2)O)natural convection in a heated incinerator shaped cavity by using the lattice Boltzmann method(LBM).Numerical results are presented in the form temperature contours,stream function and local entropy *** interaction between various physical phenomena characterizing this problem including the natural convection and the magnetic field has been *** of Rayleigh number(Ra=10^(3)-10^(6)),volumetric fraction of nanoparticles(ϕ=0-0.04),and Hartmann number(Ha=0-90)are clarified in details through graphical *** depict that the average Nusselt number(Nu_(m))and average entropy generation(S_(gen,A))increases with an increase of the Rayleigh number while are decreased by applying a magnetic *** addition,it is found that the average Nusselt number(Nu_(m))increases with the rise of volumetric fraction of nanoparticles for all Rayleigh and Hartmann ***,an opposite effect is obtained by an increase in volumetric fraction of nanoparticles on the average entropy generation(S_(gen,A)).Finally,the numerical results demonstrate that the effect of Lorentz force is reduced when the heat transfer regime conduction is considered.

关键词： Incinerator Entropy generation Natural convection Hybrid-nanoliquid Magnetohydrodynamic(MHD)

Analysis and Control of the Vehicle Roll Dynamics Using Sum of Squares Polynomial Approach

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Journal of Systems Science & Complexity 2024年第6期37卷 2318-2346页

作者： IBEN ammar Imen DOUMIATI Moustapha TALJ Reine CHOKOR Abbas MACHMOUM mohamed ESEO-IREENA 10 Bd Jeanneteau-CS 90717Angers49107France Institut de Recherche en Energie Electrique de Nantes Atlantique IREENA UR 464237 Boulevard de l'Universite-BP406Saint-NazaireF-44602France Sorbonne Universités Universite de Technologie de CompiegneCNRSHeudiasyc UMR 7253CS 6031960203 CompiegneFrance Continental 17 Rue Paulin Talabot31100 ToulouseFrance

The safety of vehicle travel relies on good stability performance,making vehicle motion control a vital technology in *** paper focuses on investigating the impact of roll control on vehicle performance,particularly in terms of avoiding rollover and ensuring lateral *** introducing a feedback roll moment,the roll motion can be effectively *** paper considers two roll reference generators:A static one aimed at zero roll,and a dynamic one based on the vehicle's lateral *** static roll reference generator enhances stability by employing a fixed reference,particularly beneficial during routine driving *** contrast,the dynamic roll reference generator continually adapts the roll angle reference in response to real-time vehicle dynamics and driving *** proposed reference generators can be paired with varying suspension systems—Static reference could be achieved using semi-active suspensions,while the dynamic one is integrated into advanced active suspension systems,offering heightened adaptability and *** address the roll control objectives,this paper proposes a novel sum of squares(SOS)integral polynomial tracking *** proposed controller satisfies control bounds and considers control constraints during the design *** effectiveness and robustness of the proposed control scheme are evaluated through numerical simulations using a full vehicle nonlinear model in Matlab/*** results of these simulations are compared to super-twisting sliding mode and Lyapunov-based controllers.

关键词： Active suspensions lateral stability polynomial control rollover avoidance SOS approach

TiO_2–PANI/Cork composite: A new floating photocatalyst for the treatment of organic pollutants under sunlight irradiation

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Journal of Environmental Sciences 2017年第10期29卷 3-13页

作者： Mouheb Sboui mohamed Faouzi Nsib Ali Rayes Meenakshisundaram Swaminathan ammar Houas Laboratory CI-Sfax Faculty of Science University of Sfax URCMEP (UR11ES85) Faculty of Sciences University of Gabès National School of Engineers (ENIG) University of Gabès High School of Sciences and Technology of Hammam Sousse University of Sousse Nanomaterials Laboratory International Research Centre Kalasalingam University Al Imam Mohammad Ibn Saud Islamic University (IMSIU) College of Sciences Department of Chemistry

A novel photocatalyst based on TiO2-PANI composite supported on small pieces of cork has been reported. It was prepared by simple impregnation method of the polyaniline（PANI）-modified TiO2 on cork. The TiO2-PANI/Cork catalyst shows the unique feature of floating on the water surface. The as-synthesized catalyst was characterized by X-ray diffraction（XRD）,scanning electron micrograph（SEM）, transmission electron microscopy（TEM）, thermogravimetric analysis（TGA）, Fourier transform infrared spectroscopy（FT-IR）, UV-vis diffuse reflectance spectra（UV-vis DRS） and the Brunauer-Emmett-Teller（BET） surface area analysis. Characterization suggested the formation of anatase highly dispersed on the cork surface. The prepared floating photocatalyst showed high efficiency for the degradation of methyl orange dye and other organic pollutants under solar irradiation and constrained conditions, i.e., no-stirring and no-oxygenation. The TiO2-PANI/Cork floating photocatalyst can be reused for at least four consecutive times without significant decrease of the degradation efficiency.

关键词： TiO2 Polyaniline Cork Floating catalyst Photodegradation Solar light

Acousto-optically driven lensless single-shot ultrafast optical imaging

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Light(Science & Applications) 2022年第4期11卷 628-643页

作者： mohamed Touil Said Idlahcen Rezki Becheker Denis Lebrun Claude Roze ammar Hideur Thomas Godin ORIA CNRS UMR6614-University de Rouen Normandie-INSA Rouen76800 Saint Etienne du RouvrayFrance

Driven by many applications in a wide span of scientifc fields,a myriad of advanced ultrafast imaging techniques have emerged in the last decade,featuring record-high imaging speeds above a trllion-frame-per-second with long sequence *** bringing remarkable insights into various ultrafast phenomena,their application out of a laboratory environment is however limited in most cases,either by the cost,complexity of the operation or by heavy data *** then report a versatile single-shot imaging technique combining sequentially timed lloptical mapping photography(STAMP)with acousto-optics programmable dispersive fhItering(AOPDF)and digital in-line holography(DIH).On the one hand,a high degree of simplicity is reached through the AOPDF,which enables full control over the acquisition parameters via an electrically driven phase and amplitude spectro-temporal tailoring of the imaging ***,contrary to most single-shot techniques,the frame rate,exposure time,and frame intensities can be independently adjusted in a wide range of pulse durations and chirp values without resorting to complex shaping stages,making the system remarkably agile and *** the other hand,the use of DIH,which does not require any reference beam,allows to achieve an even higher technical simplicity by allowing its lensless operation but also for reconstructing the object on a wide depth of field,contrary to classical techniques that only provide images in a single *** imaging speed of the system as well as its flexibility are demonstrated by visualizing ultrashort events on both the picosecond and nanosecond *** virtues and limitations as welll as the potential improvements of this on-demand ultrafast imaging method are critically discussed.

关键词： simplicity resort bringing

Combining Monte Carlo simulations and dosimetry measurements for process control in the Tunisian Cobalt-60 irradiator after three half lives of the source

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Nuclear Science and Techniques 2017年第9期28卷 119-128页

作者： Leila Ounalli Maroua Bhar Arbi Mejri Kais Manai ammar Bouabidi Shayma mohamed Abdallah Nafaa Reguigui Tunisian Center for Nuclear Sciences and Technology Technopark Sidi Thabet 2020 Ariana Tunisia Laboratory on Energy and Matter for Nuclear SciencesDevelopment Technopark Sidi Thabet 2020 Ariana Tunisia Tunisian Higher Institute of Medical Technologies 9 RueZouhair Essafi 1006 TUNIS 1006 Tunis Tunisia Faculty of Sciences of Tunis Technopark Sidi Thabet2020 Ariana Tunisia College of Science and Arts University of Bisha BishaKingdom of Saudi Arabia

To check the dose uniformity and to determine the efficiency of medical devices sterilization by gamma irradiation after three half lives of the source, calculations of the absorbed dose were carried out. Monte Carlo simulations and dosimetry measurements, were established to study the radiation processing quality control. An isodose chart was created by GEANT4 Monte Carlo code to evaluate the absorbed dose rate uniformity inside the irradiation room from the year of the installation until the year of the source reload. The dose uniformity ratio(DUR) is deduced from maximum and minimum experimental doses in medical devices after three half lives of the source.

关键词：剂量测量蒙特卡洛半衰期过程控制辐照模拟钴-60 突尼斯 Geant4

Clinical outcomes of transepithelial photorefractive keratectomy versus femtosecond laser assisted keratomileusis for correction of high myopia in South Egyptian population

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International Journal of Ophthalmology(English edition) 2020年第1期13卷 129-134页

作者： Amr Mounir Engy mohamed Mostafa Hatem ammar Osama Ali Mohammed Alahmady Hamad Alsmman Mahmoud mohamed Farouk mohamed Gamal Elghobaier Department of Ophthalmology Sohag Faculty of MedicineSohag UniversitySohag 82524Egypt Egyptian Police Hospitals Cairo 11765Egypt

AIM: To evaluate the safety and efficacy of transepithelial photorefractive keratectomy(t-PRK) with adjuvant mitomycin C(MMC) versus femtosecond laser assisted keratomileusis(Femto-LASIK) in correction of high ***: Prospective randomized comparative study including 156 eyes of 156 patients with high myopia and a spherical equivalent refraction(SER) <-6.00 D. They were divided randomly into two groups: Group A included 72 eyes treated with t-PRK with adjuvant MMC and Group B included 84 eyes treated with Femto-LASIK. Visual acuity, SER, corneal topography, pachymetry and keratometry were assessed for 12 mo ***: The preoperative mean SER was-8.86±1.81 and-9.25±1.70 D in t-PRK MMC group and Femto-LASIK respectively(P=0.99) which improved to-0.65±0.43 D and-0.69±0.50 D at 12 mo follow up. Mean SER remained stable during the 12 mo of follow-up, with no statistically significant difference between the two groups(P=0.64). In t-PRK MMC group, only six eyes needed retreatment after six months of follow up. And two eyes showed haze(one reversible haze grade 2, while the other had dense irreversible haze grade 4).CONCLUSION: t-PRK MMC provides safe and satisfactory visual outcomes and acceptable risk as Femto-LASIK in patients with high myopia.

关键词： transepithelial photorefractive keratectomy femtosecond laser assisted keratomileusis high myopia corneal haze Egypt

Identification of suitable sites for rainwater harvesting structures in arid and semi-arid regions:A review

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International Soil and Water Conservation Research 2016年第2期4卷 108-120页

作者： ammar Adham Michel Riksen mohamed Ouessar Coen Ritsema Wageningen University Soil Physics and Land Management Group476700 AA WageningenThe Netherlands Institut des Régions Arides Route de Djorf km 22.54119 MedenineTunisia University of Anbar RamadiIraq

Harvested rainwater is an alternative source of water in arid and semi-arid regions(ASARs)around the *** researchers have developed and applied various methodologies and criteria to identify suitable sites and techniques for rainwater harvesting(RWH).Determining the best method or guidelines for site selection,however,is *** main objective of this study was to define a general method for selecting suitable RWH sites in ASARs by assembling an inventory of the main methods and criteria developed during the last three *** categorised and compared four main methodologies of site selection from 48 studies published in scientific journals,reports of international organisations,or sources of information obtained from *** then identified three main sets of criteria for selecting RWH locations and the main characteristics of the most common RWH techniques used in *** methods were diverse,ranging from those based only on biophysical criteria to more integrated approaches including socio-economic criteria,especially after *** most important criteria for the selection of suitable sites for RWH were slope,land use/cover,soil type,rainfall,distance to settlements/streams,and *** success rate of RWH projects tended to increase when these criteria were considered,but an objective evaluation of these selection methods is still *** studies now select RHW sites using geographic information systems in combination with hydrological models and multi-criteria analysis.

关键词： Arid and semi-arid regions RWH Suitability Multi-criteria GIS Modelling

Synthesis and spectroscopic characterization of novel 2-amino-4,5,6,7-tetrahydro-3H-cyclopenta[d]pyrimidine and pyrimido[1,2-α]pyrimidine derivatives

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Chinese Chemical Letters 2015年第6期26卷 690-694页

作者： mohamed S.A.El-Gaby Jehan A.Micky Nadia M.Saleh Yousry A.ammar Heba S.A.mohamed Chemistry Department Faculty of ScienceAl-Azhar University at Assiut Chemistry Department Faculty of Science (Girl’s)Al-Azhar University Chemistry Department Faculty of ScienceAl-Azhar University Photochemistry Department National Research CenterEl-DokkiGizaEgypt

2-Aminocyclopenta[d]pyrimidines 3a-c were achieved via a one-pot, three-component reactions of cyclopentanone 1, aromatic aldehyde and guanidine hydrochloride （1：2：1 molar ratio）. Also, cyclization of 2,5-bis-（arylmethylidene）cyclopentanones 2 with guanidine hydrochloride （1：1 molar ratio） in methanol in the presence of sodium methoxide afforded cyclopenta-[d]pyrimidines 3. Compound 3c has been shown to be a useful building block for the synthesis of some novel pyrimido[ 1,2-a]pyrimidines 5, 7 and 12. The structures of the newly synthesized compounds were confirmed on the basis of analytical and spectral data,

关键词： Multicomponent reaction Cyclopenta[d]pyrimidine Pyrimido[1 2-a]pyrimidine Cyclopentanone