Publications by authors named "N Ben Salah"

175 Publications

Synthesis of carbon nanotubes using pre-sintered oil fly ash via a reproducible process with large-scale potential.

Methods 2021 Sep 17. Epub 2021 Sep 17.

Department of Chemistry, Faculty of Applied Sciences, Taiz University, Taiz, Yemen.

Oil fly ash (OFA) is a byproduct generated by the burning of heavy crude oil in factories and power plants. Millions of tons of OFA is produced annually worldwide and is mostly treated as solid waste. Extensive efforts have been made to utilize OFA and reduce its environmental effects. Recently, OFA has been found to be a suitable catalyst and co-precursor for carbon nanotube (CNTs) production. However, the treatment methods used are expensive and time consuming. Here, we describe a new method for OFA treatment and provide optimized growth conditions for CNTs production. Pre-sintering of OFA at elevated temperatures (400-450 °C) in air or vacuum using a chemical vapor deposition (CVD) tube furnace (80-100 min) is a very effective treatment method for CNTs growth under optimum growth conditions. The optimum parameters for CNTs growth were growth temperature, gas pressure, gas flow rate, and growth time. Well-defined, thin nanotubes with diameters of 20-40 nm were produced. Bamboo-like nanotubes with zigzag curved walls were also observed in the produced CNTs. The weight percentage of the produced CNTs was approximately twice that of the treated OFA. Consequently, the pre-sintering method exhibited suitability for the mass production of CNTs. Thus, large quantities of the nanomaterial can be supplied for use in various applications, e.g., polymer composites, the rubber industry, construction materials, and lubricant additives.
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http://dx.doi.org/10.1016/j.ymeth.2021.09.004DOI Listing
September 2021

[Paraneoplastic limbic encephalitis complicating pulmonary adenocarcinoma: a case report].

Pan Afr Med J 2021 2;39:95. Epub 2021 Jun 2.

Université de Tunis El Manar, Faculté de Médecine de Tunis, Centre Hospitalier Universitaire Mongi Slim, La Marsa, Service de Pneumologie Allergologie, Tunis, Tunisie.

Limbic encephalitis (LE) is a rare disease often of paraneoplastic origin. It is frequently associated with bronchopulmonary cancer. Diagnosis is based on brain magnetic resonance imaging (MRI). We here report the case of a 54-year-old female patient with a history of active smoking, presenting with chronic dry cough. Chest X-ray showed suspicious right lung opacity. Bronchial fibroscopy and bronchial biopsies were not contributory. Thoraco-abdomino-pelvic computed tomography (CT)-scan and brain CT-scan showed a mass in the right upper lobe classified as T4N2M1a. CT-guided lung biopsy confirmed the diagnosis of bronchopulmonary adenocarcinoma. The patient had reported a recent history of memory disturbances associated with depressed mood, anxiety and paroxysmal confusion. Metabolic screening and tests for detecting infection were normal and brain MRI suggested limbic encephalitis. The evolution was characterized by rapid disease progression; the patient died in about ten days.
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http://dx.doi.org/10.11604/pamj.2021.39.95.26568DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8379404PMC
September 2021

A case of interstitial granulomatous dermatitis associated with human immunodeficiency virus infection.

Australas J Dermatol 2021 Aug 23. Epub 2021 Aug 23.

Dermatology Department, Research Laboratory LR20SP03A, Fattouma Bourguiba University Hospital, University of Monastir, Monastir, Tunisia.

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http://dx.doi.org/10.1111/ajd.13696DOI Listing
August 2021

Serious Combination of Chronic Non Tamponade Uremic Pericardial Effusion, Hypotension, and Atrial Fibrillation on Living Donor Renal Transplantation: A Case Report and Review of Literature.

Transplant Proc 2021 Jul 12. Epub 2021 Jul 12.

Department of Anesthesiology, Armed Forces Hospital-Southern Regions, Khamis Mushayt, Saudi Arabia.

Although pericardial effusions are not uncommon in patients with end-stage renal disease, uremic pericardial effusion (UPE) frequently remains unrecognized in the absence of clinical signs and symptoms. We present a case of post-living donor renal transplantation delayed graft function due to asymptomatic undiagnosed chronic nontamponade UPE. The patient developed dramatic intraoperative severe hypotension, electrolyte abnormalities, and atrial fibrillation. Prolonged intraoperative hypotension and allograft hypoperfusion caused mild acute tubular necrosis and postoperative delayed graft function that required 2 weeks to recover. The combination of chronic UPE, even without tamponade, hypotension, and atrial fibrillation could lead to significant hemodynamic instability during renal transplantation. More careful immediate pretransplantation cardiac evaluation and avoidance of intraoperative hypotension could prevent these serious consequences of silent UPE.s.
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http://dx.doi.org/10.1016/j.transproceed.2021.06.023DOI Listing
July 2021

Case Report: Allergic Bronchopulmonary Aspergillosis Revealing Asthma.

Front Immunol 2021 22;12:695954. Epub 2021 Jun 22.

Faculty of Medicine, Tunis El Manar University, Tunis, Tunisia.

Allergic bronchopulmonary aspergillosis (ABPA) is an immunological pulmonary disorder caused by hypersensitivity to which colonizes the airways of patients with asthma and cystic fibrosis. Its diagnosis could be difficult in some cases due to atypical presentations especially when there is no medical history of asthma. Treatment of ABPA is frequently associated to side effects but cumulated drug toxicity due to different molecules is rarely reported. An accurate choice among the different available molecules and effective on ABPA is crucial. We report a case of ABPA in a woman without a known history of asthma. She presented an acute bronchitis with wheezing dyspnea leading to an acute respiratory failure. She was hospitalized in the intensive care unit. The bronchoscopy revealed a complete obstruction of the left primary bronchus by a sticky greenish material. The culture of this material isolated and that of bronchial aspiration fluid isolated . The diagnosis of ABPA was based on elevated eosinophil count, the presence of specific IgE and IgG against and left segmental collapse on chest computed tomography. The patient received an inhaled treatment for her asthma and a high dose of oral corticosteroids for ABPA. Her symptoms improved but during the decrease of corticosteroids, the patient presented a relapse. She received itraconazole in addition to corticosteroids. Four months later, she presented a drug-induced hepatitis due to itraconazole which was immediately stopped. During the monitoring of her asthma which was partially controlled, the patient presented an aseptic osteonecrosis of both femoral heads that required surgery. Nine months after itraconazole discontinuation, she presented a second relapse of her ABPA. She received voriconazole for nine months associated with a low dose of systemic corticosteroid therapy with an improvement of her symptoms. After discontinuation of antifungal treatment, there was no relapse for one year follow-up.
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http://dx.doi.org/10.3389/fimmu.2021.695954DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8259593PMC
June 2021
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