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Geochemical Record of the Cenomanian-Turonian Anoxic Event in Tunisia:Is it Correlative and Isochronous to the Biotic Signal?

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Acta Geologica Sinica(English Edition) 2011年第6期85卷 1310-1335页

作者： Mohamed SOUA Dalila ZAGHBIB-TURKI Hela ben JEMIA Jalel SMAOUI amel BOUKADI Exploration and Studies Department Entreprise Tunisienne d'Activités Pétrolières(ETAP) Charguia Ⅱ2035 Tunisia Département of Geology Faculty of sciences of Tunis University of Tunis El Manar1068 Tunisia Petroleum Research and Development Center(CRDP-ETAP) Charguia Ⅱ 2035 Tunisia

In Tunisia, five Bahloul spaced sections, Bargou, Jerisa, Guern Halfaya, Kherij and Gafsa were analyzed for biostratigraphy （foraminifera and radiolarians） and major and trace elements. This high-resolution biostratigraphic and chemostratigraphic integrated analyses for the Late Cenomanian-Early Turonian Bahloul Formation provide new insight into the palaeoceanographic evolution of the southern Tethyan margin. Relative low abundance of related terrigenous Ti/Ai and K/ Al ratios and enrichment of some productivity proxies such as Ba, Cu, and Ni （organic matter related trace elements） suggests that the Bahloul, deposited during a relatively short period （0.5 Ma）, was of relatively elevated primary productivity and minimal detrital input. While higher D＊ values concurrent with lower Ti/AI ratios are interpreted as caused by enhanced fluvial material contribution, due to more humid climate during the OAE-2. Enhanced humidity triggered probably fluvial influxes, resulted in a sluggish water circulation and consequent anoxic/euxinic conditions favoring the preservation of organic matter at the bottom. Enrichments in redox-sensitive trace metals U, V, and Mo in the Bahloul Formation deposits and redox indices, such as V/（V＋Ni）, U/Th, V/Cr, and Ni/Co, indicate that oxygen-restricted conditions prevailed during the Late Cenomanian to earliest Turonian times and correlate well with relative abundances of some foraminiferal and radiolarian paleo- environmental relevant indicators. High Ba~ values and Uauth may indicate anoxic conditions at least at the water-sediment interface during the Bahloul Formation deposition and provide information about low to moderate sulfate-reduction reactions.

关键词： Bahloul Formation Foraminifera chemostratigraphy OAE-2

Physiological, histopathological and cellular immune effects of Pergularia tomentosa extract on Locusta migratoria nymphs

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Journal of Integrative Agriculture 2019年第12期18卷 2823-2834页

作者： Meriam Miladi Khemais Abdellaoui amel ben Hamouda Iteb Boughattas Mouna Mhafdhi Fatma Acheuk Monia ben Halima-Kamel Higher Agronomic Institute of Chott Mariem Sousse UniversityChott Mariem 4042Tunisia General Directorate of Plant Health and Agricultural Inputs Control Ministry of AgricultureTunis 1002Tunisia Laboratory of Valorization and Conservation of Biological Resources Department of BiologyFaculty of SciencesUniversity of BoumerdesBoumerdes 35000Algeria

The migratory locust Locusta migratoria(Orthoptera,Acrididae)is one of the most important pests due to its extensive and severe damage to crops in large parts of Africa and *** and ecologically natural products such as bota nical insecticides are emergi ng can didates for replaceme nt of usually applied chemical *** crude methanolic extract of Pergularia tomentosa(PME)was investigated for their toxicity and physiological aspects on *** *** showed that treatment of newly emerged fourth and fifth instar nymphs resulted in significant mortality and significant repellent activity with an LC50 value of 0.18 and 0.38%,respectively,after seven days of *** PME toxicity was also dem on strated by histopathological cha nges in the alime ntary canal resulting in con siderable disorganization and severe damage of the caeca and proventriculus *** extract induced cellular immune reactions which manifested by a significant decrease in the number of the differential haemocyte counts(prohemocytes and plasmatocytes)and important cell *** of biochemical analyses showed that the PME reduced the activity of acetylcholinesterase and induced the glutathione *** neurotoxic effect was confirmed by the histological alterations in the brain structure,particularly in the neurosecretory cells showing typical signs of cell necrosis.

关键词： Locusta migratoria Pergularia tomentosa toxicity histopathology haemocytes enzymes

On fractional discrete financial system:Bifurcation,chaos,and control

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Chinese Physics B 2024年第10期33卷 129-140页

作者： Louiza Diabi Adel Ouannas amel Hioual Shaher Momani Abderrahmane Abbes Laboratory of Dynamical Systems and Control University of Larbi Ben M’hidiOum El Bouaghi 04000Algeria Department of Mathematics and Computer Science University of Larbi Ben M’hidiOum El Bouaghi 04000Algeria Nonlinear Dynamics Research Center Ajman UniversityAjman 346United Arab Emirates Department of Mathematics The University of JordanAmman 11942Jordan Laboratory of Mathematics Dynamics and ModelizationUniversity Badji MokhtarAnnaba 23000Algeria

The dynamic analysis of financial systems is a developing field that combines mathematics and economics to understand and explain fluctuations in financial *** paper introduces a new three-dimensional(3D)fractional financial map and we dissect its nonlinear dynamics system under commensurate and incommensurate *** such,we evaluate when the equilibrium points are stable or unstable at various fractional *** use many numerical methods,phase plots in 2D and 3D projections,bifurcation diagrams and the maximum Lyapunov *** techniques reveal that financial maps exhibit chaotic attractor *** study is grounded on the Caputo-like discrete operator,which is specifically influenced by the variance of the commensurate and incommensurate ***,we confirm the presence and measure the complexity of chaos in financial maps by the 0-1 test and the approximate entropy ***,we offer nonlinear-type controllers to stabilize the fractional financial *** numerical results of this study are obtained using MATLAB.

关键词： financial model stability chaos commensurate and incommensurate orders complexity

Hybrid Task and Message Scheduling in Hard Real Time Distributed Systems over FlexRay Bus

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Computer Technology and Application 2013年第9期4卷 445-454页

作者： Houda Jaouani Rim Bouhouch amel ben Ncira Salem Hasnaoui Khaled Jlassi Ecole Nationale d'lngdnieurs de Tunis LR-99-ES21 Laboratoire des Syst~mes de Communications Universitd de Tunis El ManarTunis PC 1002 Tunisies Institut Superieur des Sciences Appliqu~es et de Technologie de Kasserine Universit~ de Kairouan Kairouan PC 3131 Tunisie Ecole Nationale d'Ingdnieurs de Tunis LR-I 1-ES15 Laboratoire des Systbmes Electriques Universitd de Tunis El Manar TunisPC 1002 Tunisie

FlexRay is a vehicular communication protocol designed to meet growing requirements in hard real time automotive systems and to support time triggered as well as event triggered paradigms. Thus, there has been a lot of recent interest in timing analysis techniques in order to provide bounds for the message communication times on FlexRay. In this paper, we present an approach to compute the WCRT （worst case response time） for periodic and sporadic tasks, within a FlexRay node, responsible for sending messages on the FlexRay SS （static segment） and DS （dynamic segment）. On the other hand, we propose a scheduling table for messages transmitted over the FlexRay SS. An interesting innovation would be the use of a scheduling algorithm performed on a FlexRay node to guarantee the arrival of the right data on the right time and to ensure that every task meets its deadline. As application, we will use the extended SAE （society of automotive engineers） benchmark for the FlexRay network to identify the static and dynamic tasks, and calculate the response time, based on a hybrid scheduling model to further prove that the deadline of the SAE benchmark applications is insured.

关键词： FlexRay fixed scheduling periodic tasks WCRT SAE benchmark.

Hemothorax Revealing Aortic Aneurism and Aortic Dissection

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Open Journal of Respiratory Diseases 2013年第3期3卷 113-115页

作者： Fatma Chermiti ben Abdallah Houda Gharsalli Hamida Kwas Sofia Taktak amel Chtourou Ali ben Kheder Pneumology IV department Abderrahman Mami Hospital Ariana Tunisie

Hemothorax caused by rupture of aortic aneurysm or aortic dissection is an uncommon manifestation and carries a high mortality rate. We report two cases of 75- and 80-year-old men, who were referred to our department for exploration of a left pleural opacity. Thoracentesis produced a hemorrhagic fluid. The computed tomography scan revealed an aortic dissection type B of Stanford in the first case and an aneurysm of the descending thoracic aorta in the second patient. Emergency operation was performed in the first case but the patient died of multiple organ failure 48 hours after surgery. Aortic dissection or aneurysm can result in a hemothorax especially in patient with favourable conditions such as elderly patient and systemic hypertension. Diagnosis relies on computed tomography (CT) scan and echocardiography.

关键词： Aortic Aneurysm Aortic Dissection Hemothorax Computed Tomography Scan Echocardiography

Drug-Induced Acute Kidney Injury in Diabetes Mellitus

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Open Journal of Nephrology 2016年第4期6卷 176-187页

作者： amel Harzallah Hayet Kaaroud Mariem Hajji Fethi ben Hamida K. Khiari I. Gorsane Taieb ben Abdallah Department of Medicine A Charles Nicolle Hospital Tunis Tunisia Faculty of Medicine University of Tunis El Manar Tunis Tunisia Laboratory of Renal Pathology LR00SP01 Charles Nicolle Hospital Tunis Tunisia

Background: Drug-induced acute kidney injury is a common situation in clinical practice. Many treatments are involved and they are even more aggressive when associated with a predisposing factor such as diabetes. We aimed to investigate clinical features of acute drug-induced kidney injury in diabetics in order to clarify renal prognosis. Methods: This was a descriptive and analytical retrospective study including diabetics who presented drug-induced acute kidney injury, conducted in our department during the period from 1986 to 2015. Acute kidney injury was classified according to Kidney Disease Improving Global Outcomes criteria. We analyzed medical records of patients. Results: 31 patients were included with mean age of 65.41 years and gender ratio M/F at 0.93. Diabetes was type 2 in 97% of cases. Mean previous creatinine clearance was 39.33 ml/min/1.73 m2. Drugs involved were blockers of renin-angiotensin system (35%), aminoglycosides (16%), non-steroidal anti-inflammatory (16%), diuretics (13%), lipid-lowering agents (10%), rifampicin (6%) and ifosfamide (3%). Extracellular dehydration was present in nine cases (29%). Main drug combinations were with diuretics in 16 cases (52%) and with ACE inhibitor or ARB in eight cases (26%). Oligo anuria was observed in 5 cases (16%). Proteinuria with urine strips was objectified in 25 cases (81%). Acute kidney injury was grade 3 in 24 cases (77%), grade 2 in three cases (10%) and grade 1 in four cases (13%). Renal survival at 102 months was 57%. Identified renal prognosis factors were serum phosphorus >1.47 mmol/l (p = 0.01), proteinuria at urine strips (p = 0.042), dehydration (p = 0.013), oral antidiabetic treatment (p = 0.038), intravenous rehydration (p = 0.021) and insulin (p = 0.006). Conclusion: Drug-induced acute kidney injury is potentially serious in diabetics. Prevention is essential to improve the prognosis of this renal damage.

关键词： Renal Failure Nephrotoxicity Drugs

A seropositive nodular rheumatoid polyarthritis without arthritis, does it exist?

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Open Journal of Internal Medicine 2013年第2期3卷 70-72页

作者： ben Fredj Ismail Fatma Rezgui amel Karmani Monia ben Abdallah Olfa Azzebi Samira Laouani Kechrid Chedia Department of Internal Medicine Sahloul Hospital Sousse Tunisia

Introduction: The rheumatoid polyarthritis is the most frequent chronic polyarthritis. It affects essentially woman between 40 and 60 years old. Rheumatic subcutaneous nodules and tenosynovitis are usually associated with seropositive symptomatic rheumatoid polyarthritis. However, it is rare that they constitute the essential clinical expression of the disease. Case report: A 60-year-old woman was hospitalized for tumefaction of the dorsal face of the right hand evolved two months before. The clinical examination was found isolated subcutaneous nodules. The anatomopathological exam of one nodule ended in its rheumatoid origin and the MRI of a second one confirmed a tenosynovitis. Anti-CCP antibodies were positive. The patient has never suffered from arthralgias. The evolution was favourable under corticosteroid therapy, methotrexate and colchicine. Discussion: Rheumatic subcutaneous nodules and tenosynovitis are usually associated with seropositive symptomatic rheumatoid polyarthritis. It is rare that they constitute the essential clinical expression of the disease. Conclusion: The extra-articular appearances of the rheumatoid polyarthritis must not be underestimated especially since they can constitute—even rarely—the essential clinical expression of the disease.

关键词： Rheumatoid Polyarthritis Rheumatoid nodules Seropositive Tenosynovitis

Primary Laryngeal Tuberculosis

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International Journal of Clinical Medicine 2015年第4期6卷 249-251页

作者： Madiha Mahfoudhi Khaled Khammassi amel Gaieb Battikh Mamia ben Salah Sami Turki Department of Internal Medicine A. Charles Nicolle Hospital Tunis Tunisia Department of Oto-Rhino-Laryngology Charles Nicolle Hospital Tunis Tunisia

Primary laryngeal tuberculosis is rare. It can manifest as a malignancy delaying the diagnosis and the therapeutic management. We report the case of a 34-year-old immunocompetent man whose plaints were fever, sweat and dysphonia. There were no adenopathy, nor hepatosplenomegaly. Several blood cultures were negative. Laboratory studies showed an inflammatory syndrome. In addition, the bacteriological examinations of sputum and urine in search of Mycobacterium tuberculosis were negative. Laryngoscopy confirmed the presence of a thickness of the right vocal cord and an ulcer in the hemilarynx. The histological examination revealed tuberculoid granulomas suggestive of tuberculosis. The culture from vocal cord tissue for Mycobacterium tuberculosis was positive. No other focus of tuberculosis was found on X-ray and computed tomography. Treatment by a combination of isoniazid, rifampicin, pyrazinamide induced a total resolution of symptoms.

关键词： Larynx Tuberculosis Dysphonia

Adult Onset Still’s Disease: Articular Manifestations in Twenty Cases

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Open Journal of Clinical Diagnostics 2015年第2期5卷 41-45页

作者： Madiha Mahfoudhi Imen Gorsane amel Gaieb Battikh Rafik Shimi Sami Turki Fathi ben Hamida Taieb ben Abdallah Internal medicine A department.Charles Nicolle Hospital TunisTunisia Research Unit of Kidney Diseases(LR00SP01) Charles Nicolle HospitalTunisTunisia

The adult onset Still’s disease is a rare inflammatory pathology of unknown pathogeny. The clinical features are variable. The diagnosis is difficult since exclusion of infectious, systemic and tumoral pathologies should be done. The articular complications are frequent and can be revelatory of this pathology. The articular prognosis depends on the diagnosis delay and the treatment efficiency. Our study aims to analyze different aspects of articular manifestations complicating adult onset Still’s disease to define epidemiological, clinical and evolving characteristics of these complications. It was a cross-sectional study concerning 20 cases of adult onset Still’s disease diagnosed from 1990 to 2015 in the internal medicine A department of Charles Nicolle Hospital in Tunis, meeting Yamaguchi criteria. We identified clinical, radiological, evolving and therapeutic profile of the articular manifestations occurred in these patients. There were 13 women and 7 men. The average age was 25 years. The arthralgias were reported in all cases;while, the arthritis interested fifteen patients. A hand deformation was found in four patients. A wrist ankylosis was noted in one case and a flexion elbow in one patient. The standard articular radiographs were normal in twelve cases. The treatment associated essentially non-steroidal anti-inflammatory and/or corticosteroids and/or methotrexate. Concerning the evolving profile, the monocyclic form was present in 25% of the cases, the intermittent form in 45% and the chronic articular form in 30% of our patients. The adult onset Still’s disease is rare and heterogeneous. The articular disturbances are frequent and have various outcomes.

关键词： Adult Onset Still’s Disease Arthritis Fever Corticosteroids Biotherapy Prognosis