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Processes for the Clarification of the Crude Oil of Baobab Seeds Extracted by Pressing on Activated Carbon elaborated from the Capsules of the Fruit (Adansonia digitata L.)

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Advances in Chemical Engineering and Science 2023年第2期13卷 105-118页

作者： Edouard Mbarick Ndiaye Alioune Sow Kalidou Ba Mouhamed Ndoye yousra el idrissi Seyni Ndiaye Hamza el Moudden Papa Guedel Faye Hicham Harhar Nicolas Ayessou Mohamed Tabyaoui Mady Cisse Laboratory of Water Energy Environment and Industrial Processes (LE3PI) ESP-UCAD ESP-UCAD Cheikh Anta Diop University Dakar Senegal Laboratory of Materials Nanotechnology and Environment Faculty of Sciences-Rabat Mohammed V University of Rabat Rabat Morocco Laboratory of Biological Agronomic Food Sciences and Modeling of Complex Systems (LABAAM) UFR of Agronomic Scienc-es Aquaculture and Food Technologies (S2ATA) Gaston Berger University of Saint-Louis Saint-Louis Senegal Higher School of Technology of el Kelaa of The Sraghna Cadi Ayyad University Marrakech Morocco

The baobab, Adansonia digitata L. plays an important role in the economy of local populations. The oil from the seeds of the baobab fruit is nowadays highly prized because of its numerous cosmetic and therapeutic applications and its composition of unsaturated fatty acids, sterols and tocopherols. However, unlike refined oils, locally extracted baobab oil has not undergone purification operations to ensure its quality. Only a filtration on special cloths is carried out after decantation. Indeed, the oil obtained after pressing is cloudy because of the presence of various impurities. It therefore requires treatment operations to make it more attractive and of higher quality. Therefore, in order to provide innovative solutions to local companies to improve the quality of vegetable oils, a study of clarification (treatment) of crude oil is necessary. An experimental device has been developed in the laboratory. It includes a glass column and a filter bed of dune sand and activated carbon. This study has shown the efficiency of the experimental device. Indeed, the activated carbon, thanks to its adsorbing power, has allowed a significant decrease in turbidity at the 5% threshold, from 14.61 NTU for the raw oil to 0.08 NTU for the oil filtered on 3% carbon and 0.033 NTU for the oil filtered on 5% carbon. That is to say an abatement higher than 95%. This decrease in turbidity could be correlated with the decrease in brown index from 187.39a for the initial crude oil to 128.53d for the oil treated with 3% activated carbon versus 187.59a for the oil filtered on cloths. The lowest brown index was observed with the filtration using 5% activated carbon (35.99b). Thus, for the yellowness index, only the filtration on 5% charcoal allowed to obtain a significant decrease in yellowness. The yellowing index of the oil with 5% was 44.67b against 79.04a for the oil filtered with 3% activated carbon, 86.33a fo

关键词： Activated Carbon Baobab Oil Clarification Filtration Process

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Valorization of Natural Residue into Activated Carbon:Example of the Shells of the African Baobab Fruit(Adansonia digitata)L.

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材料科学与工程（中英文A版） 2022年第2期12卷 41-54页

作者： Edouard Mbarick Ndiaye Kalidou Ba Alioune Sow Adama Diop yousra el idrissi Hamza el Moudden Papa Guedel Faye Hicham Harhar Nicolas Ayessou Mohamed Tabyaoui Mady Cisse Laboratory of Water Energy Environment and Industrial Processes(LE3PI) ESP-UCADESP-UCADCheikh Anta Diop UniversityBP 5085DakarSenegal Laboratory of Biological AgronomicFood Sciences and Modeling of Complex Systems(LABAAM)UFR of Agronomic SciencesAquaculture and Food Technologies(S2ATA)Gaston Berger University of Saint-LouisNgallele RoadBP 234Saint-LouisSenegal Laboratory of Materials Nanotechnology and EnvironmentFaculty of Sciences-RabatMohammed V University of RabatBP 1014RabatMorocco Higher School of Technology of el Kelaa of the Sraghna Cadi Ayyad UniversityBP 104El Kelaa of the SraghnaMorocco

This study deals with the valorization of natural residues into activated carbon prepared from waste“Baobab fruit shell”from the Fatick Region,***,after the preparation of the baobab shell,a chemical activation with orthophosphoric acid H3PO4(85%)was performed followed by pyrolysis at 530°*** eliminate possible carbonization residues,the activated carbons were impregnated in 0.1 M hydrochloric acid and/or soda solutions and then washed thoroughly with distilled water to obtain a pH between 6.5 and *** latter were then dried in an oven at 105°C for 24 h.A characterization was carried out to determine the moisture content,the ash content,the iodine and methylene blue indices,the surface functions and the pH at zero charge point(pHpzc).The moisture and ash contents were 1.87%and 0.72%,*** iodine and peroxide indices obtained were 939,09 mg/g and 575.73 mg/g,*** function analysis by Boehm’s method showed that the acidic functions were higher than the basic functions and their pHpzc was lower than *** best efficiency of methylene blue removal was 99.75%and was obtained with a mass of 0.150 g of activated carbon,pH equal to 10,an initial concentration of methylene blue of 200 mg/L and a contact time of 35 min.

关键词： Orthophosphoric acid activated carbon baobab fruit shell pyrolysis valorization

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electrical properties of ^(70)Ge:Ga near the metal–insulator transition

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Journal of Semiconductors 2015年第6期36卷 1-5页

作者： M Errai A el kaaouachi H el idrissi Laboratoire MSTI Ecole Supérieure de tecchnologie d'Agadir B.P: 33/S University Ibn ZohrFaculty of Sciences AgadirMorocco Laboratoire electronique électrotechnique Automatique et Traitement de l'Information Département Génie Electrique Faculté des Sciences et Techniques de Mohammedia Université Hassan II Mohammedia CasablancaBP 146 Quartier YasminaMohammedia

The results of the metal-insulator transition （MIT） induced by impurity concentration are presented in the case of metallic and insulating samples 70Ge：Ga p-type. The eight samples studied have Ga concentrations N ranging from 1.848 × 1017 to 1.912 × 10^17 cm-3. The conductivity measurements were carried out at low temperature in the range 1 to 0.019 K. We provide physical explanations to explain the behaviors of the temperature dependence of the electrical conductivity in both sides of the MIT. The data are for a 70Ge：Ga sample prepared and reported by Itoh et aL in Ref. [Itoh K M, Watanabe M, Ootuka Y, et al. J Phys Soc Jpn, 2004, 73（1）： 173].

关键词： 70Ge: Ga semiconductor low temperature impurity concentration metal-insulator variable rangehopping conductivity transport properties

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Variable range hopping conduction in n-CdSe samples at very low temperature

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Journal of Semiconductors 2015年第12期36卷 14-17页

作者： M Errai A el Kaaouachi H el idrissi Physics Department Ibn Zohr University Faculty of Sciences Laboratoire electronique électrotechnique Automatique et Traitement de l'Information Département Génie ElectriqueFaculté des Sciences et Techniques de Mohammedia Université Hassan Ⅱ Mohammedia Casablanca

We reanalyzed experimental data already published in Friedman J R, Zhang Y, Dai P, et al. Phys Rev B, 1996, 53（15）： 9528. Variable range hopping （VRH） conduction in the insulating three-dimensional n-CdSe samples has been studied over the entire temperature range from 0.03 to 1 K. In the absence of a magnetic field, the low temperature conductivity a of the three samples （A, B and C） obeys the Mott VRH conduction with an appropriate temperature dependence in the prefactor （a = σ0 exp [- （T0/T）]^p with p ≈ 0.25）. This behavior can be explained by a VRH model where the transport occurs by hopping between localized states in the vicinity of the Fermi level, EF, without creation of the Coulomb gap （CG）. On the contrary, no Efros-Shklovskii VRH is observed, suggesting that the density is constant in the vicinity of the EF.

关键词： n-CdSe samples low temperature variable range hopping density of state

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Kimura Disease: A Rare Case of Parotid Localization and Review of the Literature (Case Report)

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International Journal of Otolaryngology and Head & Neck Surgery 2023年第4期12卷 287-292页

作者： Drissia Benfadil Lachakar Azzedine Fahd el idrissi el Ayoubi Department of Otorhinolaryngology and Head & Neck Surgery Oto-Neuro-Ophthalmology Research Laboratory (LRONO) Medicine Faculty University Mohammed I Oujda Morocco

Kimura’s disease is a rare chronic affection of unknown etiology, endemic in the far east with a net male predominance. We present the case of a 37-year-old female patient who developed a tumor process in the left parotid region over a period of 3 years. A total left parotidectomy was performed with simple postoperative course. The anatomopathological study of the surgical specimen was in favor of Kimura’s disease. Through this case and a review of the literature, we present the main clinical, anatomopathological, therapeutic and evolutionary characteristics of this rare disease.

关键词： Kimura Disease Parotid Rare

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Comparative study of semiconductor power losses between CSI-based STATCOM and VSI-based STATCOM,both used for unbalance compensation

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Protection and Control of Modern Power Systems 2020年第1期5卷 56-69页

作者： Anas Benslimane Jamal Bouchnaif Mohammed Essoufi Bekkay Hajji Loukmane el idrissi Laboratory Renewable energy embedded system and information processingNational School of Applied SciencesUniversity of Mohammed IOujdaMorocco Laboratory of electrical Engineering and Maintenance Higher School of TechnologyUniversity of Mohammed IOujdaMorocco

In this paper,we present a detailed procedure to determine the semiconductor losses for both structures of a shunt STATCOM(Static Compensator),STATCOM based on Current Source Inverter(CSI)and STATCOM based on Voltage Source Inverter(VSI),both used for voltage unbalance *** a first step,we study the VSI-based STATCOM and the CSI-based STATCOM used in high speed railway *** we analyze the design and the sizing of the unbalance compensator in order to obtain an unbalance factor that does not exceed the limits imposed by the standards or by the energy *** that,we compare the performances obtained with both structures VSI-STATCOM and CSI-STATCOM,after calculating the semiconductor power losses in the STATCOM ***,we validate our approach by simulation over real data of unbalance compensation caused by the new high-speed railway in *** use the tools MATLAB/Simulink/Simpowersys for performing our simulations.

关键词： Power losses VSI CSI STATCOM Unbalance compensation Railway

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Magnetic properties of La2CuMnO6 double perovskite ceramic investigated by Monte Carlo simulations

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Chinese Physics B 2020年第5期29卷 387-391页

作者： S Mtougui I el Housni N el Mekkaoui S Ziti S idrissi H Labrim R Khalladi L Bahmad Laboratoire de la Matière Condensée et des Sciences Interdisciplinaires (LaMCScI) Mohammed V University of RabatFaculty of SciencesB.P.1014 RabatMorocco Intelligent Processing and Security Systems Mohammed V University of RabatFaculty of SciencesB.P.1014 RabatMorocco USM/DERS/Centre National de l’Energie des Sciences et des Techniques Nucl´eaires(CNESTEN)RabatMorocco

We present a theoretical study of the magnetic properties of the lanthanum copper manganate double perovskite La2CuMnO6 ceramic,using Monte Carlo *** analyze and discuss the ground state phase diagrams in different planes to show the effect of every physical *** on the Monte Carlo simulations,which combine Metropolis algorithm and Ising model,we explore the thermal behavior of the total magnetization and *** also present and discuss the influence of physical parameters such as the external magnetic field,the exchange coupling interactions between magnetic atoms,and the exchange magnetic field on the magnetization of the ***,the critical temperature of the system is about Tc=70 K,in agreement with the experimental ***,the hysteresis loops of La2CuMnO6 are discussed.

关键词： double perovskite La2CuMnO6 Monte Carlo simulations Ising model hysteresis loops Metropolis algorithm critical temperature

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Pediatric Inflammatory Multisystem Syndrome;Unusual Presentation of COVID-19 in Children: About Thirty Cases

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Open Journal of Pediatrics 2023年第1期13卷 74-81页

作者： Fatima-Ezzahra Tahiri Karima el Fakiri Nourredine Rada Ghizlaine Draiss Nadia el idrissi Slitine Mounir Bourrous Said Younous Mohammed Bouskraoui Pediatrics Department A University Hospital Center Mohamed VI Marrakech Morocco Department of Neonatal Resuscitation University Hospital Center Mohamed VI Marrakech Morocco Pediatric Emergency Department University Hospital Center Mohamed VI Marrakech Morocco Pediatric Intensive Care Unit University Hospital Center Mohamed VI Marrakech Morocco

Pediatric inflammatory multisystem syndrome PIMS is a new entity of systemic inflammatory disease in children that appeared in the epidemic context of COVID-19 infection in April 2020. The pathophysiological mechanisms of PIMS are poorly understood and the hypothesis of a maladaptive hyperactive immune response, notably involving cytokines, is described in the literature. In our study, we report our experience regarding the clinical presentation, diagnosis, management and outcome of patients who presented with pediatric inflammatory multisystem syndrome post COVID-19.

关键词： COVID-19 Inflammation Kawasaki Like Myocarditis Immunoglobulins

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Nosocomial Klebsiella variicola Infection in Neonatal Intensive Care: A New Emerging Pathogen

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Open Journal of Pediatrics 2023年第3期13卷 450-458页

作者： Soraya Hani Abdessamad Lalaoui Fatiha Bennaoui Nabila Soraa Nadia el idrissi Slitine Fadl Mrabih Rabou Maoulainine Neonatal Resuscitation Service Mother and Child Hospital CHU Mohamed VI Marrakech Marrakech Morocco Laboratory of Childhood Health and Development Faculty of Medicine and Pharmacy of Marrakech Cadi Ayyad University Marrakech Morocco Microbiology Laboratory Arrazi Hospital CHU Mohammed VI Marrakech Marrakech Morocco

Klebsiella variicola is a human pathogen that has been misidentified as K. pneumoniae. This misidentification has led to a lack of understanding of important clinical and biological aspects of this bacterial species. It is responsible for serious and potentially fatal infections, with a prevalence of multi-resistance to routine antibiotics. We present through three clinical observations, the case of three newborns having been hospitalized in the neonatal intensive care unit and whose evolution was complicated by the occurrence of a nosocomial infection in front of which a blood culture was done on blood agar, with a manual antibiogram on antibiotic disks, isolated the germ Klebsiella variicola. The management of the newborns was initially centered on non-invasive ventilation with a bi-antibiotic therapy based on carbapenem and amikacin for two newborns and switched to colymicin for the third case. Newborn follow-up was based on assessment of general condition, clinical signs of infection, as well as a biological control made of a blood count, a c-reactive protein, a complete ionogram, and a blood culture, every four days or if signs of clinical call. The evolution was favorable for two cases with good clinical and biological improvement, and complicated by death due to alveolar hemorrhage in the third case. Given the high pathogenicity of this germ, and the frequency of misidentification, it is crucial to know the clinical spectrum of Klebsiella variicola infections in neonatal intensive care units, in order to adapt the antibiotic therapy and to mitigate the fulminant evolution of this germ.

关键词： Newborn Nosocomial Infection Klebsiella variicola Neonatal Resuscitation Antibiotic Therapy

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Neonatal Pleuropulmonary Staphylococcal Disease: A Case Report

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Open Journal of Pediatrics 2023年第1期13卷 138-145页

作者： Fatima-Ezzahra Tahiri Oualid Assem Fatiha Bennaoui Nadia el idrissi Slitine Nabila Soraa Fadl Marabih Rabou Maoulainine Department of Neonatal Resuscitation University Hospital Center Mohamed VI Marrakech Morocco Health Childhood and Development Research Team Faculty of Medicine Cadi Ayyad University Marrakech Morocco Microbiology Department University Hospital Center Mohamed VI Marrakech Morocco

Staphylococcal pleuropulmonary disease (SPP) is the localization of pathogenic staphylococcal disease in the lung and pleura and its general haematogenic consequences. This location is not primary, but follows a primary skin or mucous infection that may go unnoticed. This is a very rare phenomenon in neonatology and in the various literature reviews. Through our observation we report the clinical diagnosis of a newborn 13-day age with pleuro-pulmonary staphyloccocia point of departure cutaneous, thus the paraclinical explorations performed in our patient therapeutic management and evolutionary profile after a 3-month decline. Note that the problem of resistance of staphylococci to different antibiotics is currently a real public health problem making the choice of treatment very difficult for the clinician.

关键词： Newborn Skin Infection Respiratory Distress Meticillin-Resistant Staphylococcus Aureus Excavation Pneumothorax

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