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Search Results: 1 - 10 of 68 matches for " Mounia Heddad "
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The Evolution of Light Stress Proteins in Photosynthetic Organisms
Mounia Heddad,Iwona Adamska
Comparative and Functional Genomics , 2002, DOI: 10.1002/cfg.221
Abstract: The Elip (early light-inducible protein) family in pro- and eukaryotic photosynthetic organisms consists of more than 100 different stress proteins. These proteins accumulate in photosynthetic membranes in response to light stress and have photoprotective functions. At the amino acid level, members of the Elip family are closely related to light-harvesting chlorophyll a/b-binding (Cab) antenna proteins of photosystem I and II, present in higher plants and some algae. Based on their predicted secondary structure, members of the Elip family are divided into three groups: (a) one-helix Hlips (high light-induced proteins), also called Scps (small Cab-like proteins) or Ohps (one-helix proteins); (b) two-helix Seps (stress-enhanced proteins); and (c) three-helix Elips and related proteins. Despite having different physiological functions it is believed that eukaryotic three-helix Cab proteins evolved from the prokaryotic Hlips through a series of duplications and fusions. In this review we analyse the occurrence of Elip family members in various photosynthetic prokaryotic and eukaryotic organisms and discuss their evolutionary relationship with Cab proteins.
The association of Crohn’s disease with celiac disease  [PDF]
Iliass Charif, Mohamed El Abkari, Adil Ibrahimi, Mounia El Yousfi, Mounia El Yousfi
Open Journal of Gastroenterology (OJGas) , 2012, DOI: 10.4236/ojgas.2012.24036
Abstract: We report two cases of a man and a woman whose association of Crohn’s disease (CRD) and celiac disease (CD) was evident and significant. The characteristic of our patients was the young age of discovery, and the localization of the CRD which was different in the two cases: colic localization in the woman and ileal stenosing in the man. The diagnosis of MCO was confirmed by the histological study of the jejunal biopsies in both cases and by serologies (anti-gliadines Antibody) in one case. Through these two observations, we insist on the singularity of the association of the celiac disease to the Crohn’s disease and on the complex etiopathogenesis of CRD which could have common points with that of CD. This fact can help us to understand more the two diseases and thereafter master their management.
Normalization and Personalization of Learning Situation: NPLS
Mounia Abik,Rachida Ajhoun
International Journal of Emerging Technologies in Learning (iJET) , 2009, DOI: 10.3991/ijet.v4i2.818
Abstract: The personalization of learning is a major pedagogical challenge solicited by pedagogues and didacts. There are several projects about the production of personalizable learning situations such as Reload-LDE and Alfanet. These projects are interested in producing new standardized and personalizable learning situations. However, on the Web, an important number of learning situations exist. These situations are rich in information but don't consider all the characteristics of participants taking part in the learning, nor their technical environments. In this paper we suggest a help system that can transform an existing learning situation to another structure standardized and personalizable depending on the context of learning personalization that we have defined.
An Exploration of Cursor tracking Data
David Warnock,Mounia Lalmas
Computer Science , 2015,
Abstract: Cursor tracking data contains information about website visitors which may provide new ways to understand visitors and their needs. This paper presents an Amazon Mechanical Turk study where participants were tracked as they used modified variants of the Wikipedia and BBC News websites. Participants were asked to complete reading and information-finding tasks. The results showed that it was possible to differentiate between users reading content and users looking for information based on cursor data. The effects of website aesthetics, user interest and cursor hardware were also analysed which showed it was possible to identify hardware from cursor data, but no relationship between cursor data and engagement was found. The implications of these results, from the impact on web analytics to the design of experiments to assess user engagement, are discussed.
Square Wave Voltammetry for Analytical Determination of Cadmium in Natural Water Using Ca10(PO4)6(OH)2-Modified Platinum Electrode  [PDF]
Moulay Abderrahim El Mhammedi, Mounia Achak, Mina Bakasse
American Journal of Analytical Chemistry (AJAC) , 2010, DOI: 10.4236/ajac.2010.13019
Abstract: This paper reports on the development of a novel electrochemical assay for cadmium (II) in natural water, which involves the use of disposable hydroxyapatite modified platinum electrode (HAP/Pt). Cadmium (II) was preconcentrated on the surface of the modified electrode and adsorbed onto HAP and oxidized at E = –680 mV. The HAP-modified platinum electrode exhibited superior performance in comparison to the plati- num electrode and surprisingly, yielded a higher electrochemical response. The best defined anodic peak was obtained with 0.2 mol L-1 KNO3 pH 5.0 after 25 min of accumulation time. Using these conditions, the cali- bration plot was linear over the range 1 × 10?8 to 5 × 10?6 mol L-1 Cd2+. The precision was examined by car- rying out eight replicate measurements at a concentration of 2.5 ×10?5 mol L-1; the coefficient of variation was 2.9%. The method was applied to the determination of the analyte in river water samples. The interfere- ence of other metal ions on the voltammetric response of Cd(II) was studied. The HAP films was clearly ob- served in the SEM images and characterized by X-ray diffraction, IR spectroscopy and chemical analysis.
Mild Cognitive Impairment in Parkinson Disease: A Neuropsychological Study of 25 Patients  [PDF]
Siham Sanhaji, Mounia Rahmani, Maria Benabdeljlil, Mustapha El Alaoui Faris
World Journal of Neuroscience (WJNS) , 2018, DOI: 10.4236/wjns.2018.84037
Abstract: Parkinson’s disease (PD) is associated with an increased incidence of cognitive impairment and dementia. Population-based cohort of 25 patients with incident PD underwent a large neuropsychological battery. Executive functions were the most affected cognitive domain including particularly initiation, mental flexibility and inhibition. Episodic memory and visuo-spatial functions were less affected. We found that 92% of patients were classified as having Mild Cognitive Impairment (MCI); most of them experienced PD-MCI Single-Domain (17 patients) with disturbances on executive functions. Less frequently, we identified a group of patients with multiple-domain PD-MCI demonstrating deficits on executive functions as well as on episodic memory and/or visuospatial capacities.
ELECTROCHEMICAL INCINERATION OF REFRACTORY ORGANIC POLLUTION BY ELECTROCHEMICALLY GENERATED FENTON'S REAGENT
AZRI YAMINA MOUNIA,ZEROUALI DJILALI
Journal of the Chilean Chemical Society , 2012,
Abstract: The electro-Fenton process is an electrochemical method for waste water treatment based on the production of hydroxyl radicals via H2O2 generation in the presence of ferrous ions. The aim of this work is of applied Electro-Fenton technique to incinerate lubricate additive biocide N,N-methylenebismorpholine (C9H18N2O2).the effect of some operational parameters such as applied cathodic potential, the electrolysis time and aeration,concentration of supporting electrolyte on the generation of H2O2 was investigated. The optimal cathodic potential on the generation of H2O2 production was -500mV/SCE corresponding to a density current of 1.4 mA/cm2, the production of hydrogen peroxide with the aeration and electrolysis time, then became stationary after 2h of electrolysis, the low pH favorite production of H2O2 electro generated. Whereas the Concentrations of supporting electrolyte of the solution have a slight affect. The degradation and incineration of N,N-methylenebismorpholine in the optimized parameters was also investigated (potential, current density, COD/Fe2+ ratio ) the result indicates that 97% of COD was incinerated at 50mA and the optimal concentration of catalyst is between 28 and 58mg/l.
Young patient with juvenile polyposis syndrome: A case report  [PDF]
Mounia El Yousfi, Bahija Benyachou, Adil Ibrahimi, Laila Chbani, Afaf Amarti
Open Journal of Gastroenterology (OJGas) , 2012, DOI: 10.4236/ojgas.2012.23022
Abstract: A case is reported here of juvenile polyposis in a 15- year-old girl. She was diagnosed upon the assessment of the dysenteric syndrome. Coloscopy and gastro- scopy had shown polyps of variable size whose histological study confirmed the hamartomatous character typical of the youthful non adenomatous polyps free of dysplasia. There was no localization in the small bowel. Coloprotectomy with ileoanal anastomosis was carried out in view of the importance of diarrhoea and the impacts on the general state of health.
The endoscopic pneumatic balloon dilation in treating achalasia in a Moroccan center  [PDF]
Mounia El Yousfi, Nada Lahmidani, Adil Ibrahimi, Dafr-Allah Benajah
Open Journal of Gastroenterology (OJGas) , 2012, DOI: 10.4236/ojgas.2012.24033
Abstract: Aim of the work: Achalasia is a rare pathology whose physiopathogenesis is mysterious. The treatment is based on endoscopic pneumatic dilation (PD) and surgery. The aim of our work is to show our experiment about endoscopic pneumatic dilation as the principal treatment suggested for patients presenting achalasia. Material and method: It is a retrospective study relating 21 cases of achalasia indexed between 2002 and 2007. The remission was judged on Eckardt’s clinical criteria. If the symptoms persist after three episodes of PD, there’s a therapy failure and the patients were then proposed to surgery or recurrent DP. The results: The Middle Age at the time of diagnosis was of 44 ± 10, 66 years (20 to 76). The sex ratio was 1, 3 (12M?9F) (p = 0.5). The diagnosis of achalasia is based on imaging, endoscopy and manometric arguments. The PD of the cardia was proposed in first intention, except two patients who were treated 6 and 15 years before by surgery. 38 dilations were performed for 21 patients with an average of 1.8 PD per patient [1-6]. The rate of good answers after the third episode of PD was about 90.47% (19 patients). There was no complication of the PD. In plain-varied analysis, no predictive factor of good answers to PD was retained. Conclusion: PD is an effective cure with a negligible morbidity and no mortality. The surgery is reserved for the failures of pneumatic dilation.
Chemotherapy in advanced bladder cancer: current status and future
Nabil Ismaili, Mounia Amzerin, Aude Flechon
Journal of Hematology & Oncology , 2011, DOI: 10.1186/1756-8722-4-35
Abstract: The incidence of bladder cancer is increasing. An estimated 386,300 new cases and 150,200 deaths from bladder cancer occurred in 2008 worldwide [1]. The highest incidence is observed in Egypt with 37 cases per 100,000 inhabitants [2]. Bladder cancer occurs in the majority of cases in males with a male/female sex ratio of 3:1. It represents the seventh most common cancer for men [1]. In France, 10 700 new cases were diagnosed in 2000 and accounts for 3.5% of all cancer deaths. Bladder cancer is the sixth most common cancer (fifth most common cancer in men and seventh in women). In Morocco, bladder cancer was the sixth most common cancer in 2005 according to Rabat registry. The average age of diagnosis is 65 years [3].Smoking is the most implicated risk factor in western countries, followed by other factors such as polycyclic aromatic hydrocarbons and cyclophosphamide [2]. In East Africa (especially Egypt), chronic infection with Schistosoma haematobium is the most common etiology and is often associated with squamous cell carcinoma [1,2].Transitional cell carcinoma (TCC) is the most predominant histological type which represents more than 90% of the cases [4,5].In more than 70% of the cases, the diagnosis is made at early stage of the disease (stages Ta and T1). Fifty percent of the patients with the disease at advanced stages (T2 or more) experience metastatic relapse.In metastatic setting, chemotherapy treatment remains the only therapeutic option. It has the objective to alleviate the symptoms, to improve quality of life and to improve survival. In bladder TCC, chemotherapy showed very little progress and the standard MVAC is still the most used regimen and that since several years. New drugs are in the process of development, including those used in targeted therapies for which the role remains to be defined more clearly. This review emphasizes the role of chemotherapy and targeted therapies in metastatic bladder transitional cell carcinoma. Neoadjuvant or adjuva
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