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Technological Characterization and Industrial Application of Tunisian Clays from Makthar Area (Central Tunisia) in the Ceramic Industry

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Open Journal of Geology 2016年第7期6卷 626-639页

作者： Imed ben Salah Moufida ben M’Barek Jemai Ali Sdiri Najet Shimi Slim mabrouk Boughdiri Department of Geology University of Sciences of Bizerte Bizerte Tunisia National Engineering School of Sfax Sfax Tunisia Department of Geology University of Sciences of Tunis Tunis Tunisia

This study focused on the geochemical, mineralogical and technological characterization of clays in Makthar area (Central of Tunisia) of Cretaceous-Paleogene. Its aims are to identify and promote use in the field of ceramics industry. The result of the mineralogical analysis of clays showed a dominance of illite with a percentage higher than 65%, of kaolinite and smectite with percentages of 15%. Geochemical analysis of the major elements of clay showed a SiO2 content exceeding 29% and a percentage of Al2O3 higher than 7.5%. The Fe2O3 percentage was ranging from 3% to 8%. The percentage of CaO was between 22.5% and 28% while that of K2O is 4%. The percentages of SO4, MgO and NaO2 were in very small fractions. Granulometric and microgranulometric analysis showed that the clay fraction (lasticity index showed the plasticity character of clays which presented a specific surface area ranging from 112 m2/g to 178 m2/g reflecting illite dominance. Drying behavior indicated that clay mixture had a drying shrinkage less than 7%, while the firing shrinkage didn’t exceed 2% giving the possibility of clay using in the ceramics field.

关键词： Clay Mineral Mineralogy Chemical and Physical Properties Ceramic Industry

路德维希肠杆菌A18沿镰孢霉JK菌丝迁移的生态学效应

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应用与环境生物学报 2024年第1期30卷 151-157页

作者：杨埔王鹏然张鑫张犇张丽珍山西大学生命科学学院太原030006

土壤细菌沿真菌菌丝的迁移可以扩大细菌的生境,增强其作用效果;然而,生防细菌的迁移对植物致病真菌的影响尚待深入研究.利用细菌-真菌共培养体系,研究生防细菌路德维希肠杆菌A18(Enterobacter ludwigii A18)沿植物致病真菌镰孢霉JK(Fusa... 详细信息

土壤细菌沿真菌菌丝的迁移可以扩大细菌的生境,增强其作用效果;然而,生防细菌的迁移对植物致病真菌的影响尚待深入研究.利用细菌-真菌共培养体系,研究生防细菌路德维希肠杆菌A18(Enterobacter ludwigii A18)沿植物致病真菌镰孢霉JK(Fusarium ***)迁移的生态学效应.结果发现,在没有真菌菌丝存在的情况下,路德维希肠杆菌A18只能在3 g/l琼脂浓度的半固体培养基中游动,不能在更高浓度琼脂的培养基表面运动;而在镰孢霉JK存在的情况下,该细菌可以沿真菌菌丝迁移,在移动位点细菌的生物量可达108 CFU/g agar.在路德维希肠杆菌A18存在的情况下,镰孢霉JK的生长没有受到影响;然而,镰孢霉JK的产孢受到了路德维希肠杆菌A18的显著抑制,抑制率达90%.另外,路德维希肠杆菌A18可以黏附于镰孢霉JK菌丝表面形成生物膜,并利用镰孢霉JK分泌物生长,接种10 d后,路德维希肠杆菌A18的生物量从106.07±0.09 CFU/ml增加到109.07±0.10 CFU/ml.本研究表明路德维希肠杆菌A18沿镰孢霉JK菌丝迁移,不仅可以利用真菌分泌物生长,扩大其生境,而且可以抑制镰孢霉JK孢子的产生,减轻镰孢霉对农作物的危害.(图5表1参40)

关键词：路德维希肠杆菌镰孢霉菌丝际孢子迁移土壤生防细菌

Hepatitis D infection:from initial discovery to current investigational therapies

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Gastroenterology Report 2019年第4期7卷 231-245,I0001页

作者： ben l.Da Theo Heller Christopher Koh Digestive Diseases Branch National Institute of Diabetes&Digestive&Kidney DiseasesNational Institutes of HealthBethesdaMDUSA liver Diseases Branch National Institute of Diabetes&Digestive&Kidney DiseasesNational Institutes of HealthBethesdaMDUSA

Hepatitis D is the most severe form of viral hepatitis associated with a more rapid progression to cirrhosis and an increased risk of hepatocellular carcinoma and mortality compared with hepatitis B *** once thought of as a disappearing disease,hepatitis D is now becoming recognized as a serious worldwide issue due to improvement in diagnostic testing and immigration from endemic *** these concerns,there is currently only one accepted medical therapy(pegylated-interferon-a)for the treatment of hepatitis D with less than desirable efficacy and significant side *** to these reasons,many patients never undergo ***,increasing knowledge about the virus and its life cycle has led to the clinical development of multiple promising new therapies that hope to alter the natural history of this disease and improve patient *** this article,we will review the literature from discovery to the current investigational therapies.

关键词： Hepatitis D hepatitis B epidemiology natural history outcome treatment novel therapies

Pancreatic Gastrointestinal Stromal Tumour: A Case Report and Review of the literature

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Journal of Cancer Therapy 2017年第11期8卷 954-961页

作者： Daadoucha Abderrahmen Farhat Waad ben mabrouk Mohamed Harrabi Fathia Azzaza Mohamed ben Ali Ali Department of Medical Imaging Ibn Al Jazzar University Hospital Kairouan Tunisia Department of Digestive Surgery Sahloul University Hospital Sousse Tunisia

Gastrointestinal stromal tumours (GIST) are rare mesenchymal neoplasms that can develop in the entire length of the gastrointestinal tract or sometimes from the omentum and mesentery. In most cases, they arise from the stomach, less often the jejunum or ileum. We report the case of a 53-year-old-female patient, without significant medical history, consulting for chronic epigastric pain, with no other associated signs. She had underwent an abdominal ultrasound completed with a Contrast-enhanced computed tomography (CT) of the abdomen showing a large tissular mass developed at the expense of the cephalic portion of the pancreas, with central calcifications and heterogeneous enhancement after contrast injection. Pancreaticoduodenectomy, partial colectomy and antrectomy has been performed and histological examination with immunohistochemical study had concluded the diagnosis of pancreatic primary GIST.

关键词： Stromal Tumor Pancreas Imaging Histopathology

Predictive Factors of Surgery in Peptic Stenosis of the Bulb

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Open Journal of Gastroenterology 2015年第9期5卷 129-133页

作者： Mohamed ben mabrouk Aida ben Slama Trabelsi Mehdi Ksiaa Waad Farhat Ali Jmaa Ali ben Ali Department of Digestive Surgery Sahloul Hospital Sousse Tunisia Department of Gastroenterology Sahloul Hospital Sousse Tunisia

The bulb ulcer stenosis, becoming exceptional in developed countries, remains frequent in our country despite the use of the antisecretory. The purpose of our study was to study epidemiological, diagnostic, and evolutionary complication particularities, and to find potential predictive factors of resistance of ulcer stenosis of the bulb to the pump inhibitors Proton through a recent series. This is a retrospective and descriptive study involving 105 patients, treated for ulcer stenosis of the bulb between January 2007 and December 2012. All our patients had received inhibitors of Proton pump, parenterally for 7 days. They were divided into 2 groups according to their response to treatment: the first group (G1) was sensitive and the second (G2) was resistant. All patients of the G2 were operated. We had compared the two groups. There was no statistically significant difference concerning age, sex, blood group and smoking between the two groups. In univariate study, the age of the epigastralgies was greater than or equal to 9 years;the clapotage fasting, dilation and gastric atony, objectified by the oesogastroduodenal transit were significantly associated with the failure of medical treatment. Only gastric atony and seniority of the disease over 9 years were independent risk factors of resistance to the Proton pump inhibitors in multivariate study.

关键词： Bulbar Ulcer Stenosis Surgery Proton Pump Inhibitors

Three-dimensional modelling of shear keys in concrete gravity dams using an advanced grillage method

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Water Science and Engineering 2020年第3期13卷 223-232页

作者： Mahdi ben Ftima Steephane lafrance Pierre leeger Polytechnique Montreal Montreal University CampusMontrealH3C 3A7Canada

Contraction joint shear keys are resilient features of gravity dams that can be considered to increase the sliding safety factors or minimise seismic residual sliding displacements,allowing costly remedial actions to be *** paper presents a novel,robust,and computationally efficient three-dimensional(3D)modelling and simulation strategy of gravity dams,using a series of adjacent cantilever beam elements to represent individual *** monoliths are interconnected in the longitudinal direction by 3D no-tension link elements representing the lumped shear key stiffness contributions at a particular *** objective is to assess the shear key internal force demands,including the axial force,shear,and moment *** key demand-capacity ratios can then be assessed with related multi-axial failure *** 3D link element stiffness coefficients were derived from a series of 3D finite element(FE)solid models with a detailed representation of geometrical features of multiple shear *** results from the proposed method based on advanced grillage analysis show strong agreement with reference solutions from 3D FE solid models,demonstrating high accuracy and performance of the proposed *** application of the proposed advanced grillage method to a dam model with two monoliths clearly shows the advantage of the proposed method,in comparison to the classical approach used in practise.

关键词： Gravity dam Shear keys Seismic analysis Grillage analysis Finite element model Multi-scale approach

Adjusting to climate:Acclimation,adaptation and developmental plasticity in physiological traits of a tropical rainforest lizard

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Integrative Zoology 2018年第4期13卷 411-427页

作者： John llEWElYN Stewart l.MACDONAlD Craig MORITZ Felipe MARTINS AmberleeHATCHER ben l.PHIllIPS Centre for Tropical Biodiversity and Climate Change James Cook UniversityTownsvilleQueenslandAustralia CSIRO land and Water TownsvilleQueenslandAustralia Centre for Biodiversity Analysis Australian National UniversityCanberraAustralia School of BioSciences University of MelbourneMelbourneAustralia

The impact of climate change may be felt most keenly by tropical *** these taxa,it is argued,thermal specialization means a given shift in temperature will have a larger effect on *** species with limited dispersal ability,the impact of climate change depends on the capacity for their climate-relevant traits to *** shifts can occur through genetic adaptation,various forms of plasticity,or a combination of these *** we assess the extent and causes of shifts in 7 physiological traits in a tropical lizard,the rainforest sunskink(lampropholis coggeri).Two populations were sampled that differ from each other in both climate and physiological *** compared trait values in each animal soon after field collection versus following acclimation to laboratory *** also compared trait values between populations in:(i)recently field-collected animals;(ii)the same animals following laboratory acclimation;and(iii)the laboratory-reared offspring of these *** results reveal high trait lability,driven primarily by acclimation and local *** contrast,developmental plasticity,resulting from incubation temperature,had little to no effect on most *** results suggest that,while specialized,tropical ectotherms may be capable of rapid shifts in climate-relevant traits.

关键词： acclimation adaptation climate change ectotherm reptile

基于动态CRITIC赋权的中国金融压力指数构建与金融风险识别

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新疆财经 2024年第1期 21-33页

作者：祝志川蒋犇辽宁大学辽宁沈阳110036

合理测度和准确识别金融市场风险,对于稳定经济、有效防范金融风险意义重大。依据中国金融市场特征,本文采用动态CRITIC法计算权重并建立金融压力指数测度模型,通过非参数统计核密度法和B-N数据分解法对金融压力指数的分布和金融风险状... 详细信息

合理测度和准确识别金融市场风险,对于稳定经济、有效防范金融风险意义重大。依据中国金融市场特征,本文采用动态CRITIC法计算权重并建立金融压力指数测度模型,通过非参数统计核密度法和B-N数据分解法对金融压力指数的分布和金融风险状态进行估计与识别,采用马尔科夫区制转换模型检验高低风险转换概率,并与基于确定项进行识别的结果进行对比分析。研究表明:基于动态CRITIC赋权的金融压力指数更能反映金融市场的极端值和金融风险,随机冲击是影响我国金融压力指数的重要因素,两种金融风险识别方法均可识别金融风险状态且各有优势,研究中可以互为补充。今后应建立更加完善的风险测度指标体系,进一步完善监管制度,加强对金融风险的宏观审慎管理和防范。

关键词：金融压力指数动态CRITIC法 B-N数据分解法马尔科夫区制转换模型

Early Cretaceous Tectonostratigraphic Evolution of the Southern Tunisian Margin Based on Gravity,Seismic and Potential Field Data:New Insights into a Geodynamic Evolution in a Tethyan and Mesogean Rifting Context

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Journal of Earth Science 2023年第3期34卷 879-899页

作者： Mohamed ben Chelbi Faculty of Sciences of Tunis Laboratory of GeodynamicGeonumeric and Geomaterials(L3G)LR18ES37University of Tunis El ManarTunisTunisia

Many geophysical and geological data have been used to interpret the tectonic evolution of the south-eastern part of the Tunisian margin and to analyze the dominant structures in the *** Menzel Habib Plain(MHP)and surroundings,targeted by this study,exhibits thick siliciclastic and carbonate formations attributed to the Early Cretaceous *** of seismic and gravimetric data coupled with analysis of the syndepositional faults affecting these formations prove that the Tunisian margin is dominated,during this period,by N-S to NE-SW extensional *** geodynamic evolution of the MHP is mainly due to the irregular normal movement of the N-S faults,which represents the southernmost branch of the N-S Axis(NSA)and of the NW-SE faults,which constitutes the SE segment of the South Atlasic fault corridor(SAFC).In addition,the NE-SW and E-W oriented faults contributed to this *** extensive periods,this network of faults determines horst and grabens basin geometry or tilted blocks inducing formation of several distinct areas with different subsidence ***,the normal activity of the major faults promotes the vertical mobilization of the Triassic salt resulting in the individualization of several diapiric bodies,some of which pierced their sedimentary *** dynamics reflect echoes of the sinistral drifting of Africa with respect to Europe,integrated in a long Tethyan rifting cycle,and the beginning of opening of the Mesogean Sea,respectively.

关键词： Tunisian margin Early Cretaceous extensive tectonics Tethyan and Mesogean rifting geodynamics