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A New Non-centrosymmetric Microporous Fluorinated Iron Phosphate： Structural Elucidation, Spectroscopic Study and Hirshfeld Surface Analysis

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Chemical Research in Chinese Universities 2016年第4期32卷 519-526页

作者： Nabaa BOUZIDIA Besma HAMDI Abdelhamid ben salah Laboratory of Materials Science and Environment Faculty of Sciences of Sfax University of Sfax PB 1171 3000 SFAX Tunisia

The crystal structure of a new non-centrosymmetric microporous fluorinated iron phosphate, （H30）2[Fe4（H2O）2F4（PO4）2（HPO4）2]（H2O）, was determined by single crystal X-ray diffraction analysis and the result reveals that it belongs to the orthorhombic system with four molecules in the unit cell（space group P212121）. Thus, the complex was characterized by powder X-ray diffraction, spectroscopic techniques（Fourier transform infrared and Fourier transform Raman） and 19F MAS NMR. The elemental analysis of the sample was also carried out. The chiral inorganic sheets, which stacked along [100] showed the presence of FeF2O4 as well as FeF2O3H2O octahedra, PO4 besides HPO4 tetrahedra, hydronium ions（H3O＋） and isolated water molecules. Hirshfeld surface analysis, especially dnom surface and fingerprint plots, were used for decoding the intermolecular interactions in the crystal network and the contribution of component units for the construction of the 3D architecture. From the Hirshfeld surfaces and 2D fingerprint analysis, it was found that the subtle interactions, such as H...H associating the third intense interaction of all intercontacts, provide extra stabilization in addition to the presence of the strong hydrogen bonds mentioned above.

关键词： Non-centrosymmetric structure Iron fluorinated phosphate Hirshfeld surface analysis

Food Value of Soft Dates Cultivated in Tunisian Coastal Oases

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Journal of Life Sciences 2015年第5期9卷 234-241页

作者： Mohamed ben salah Laboratory of Aridology and Oases Crops Arid Land lnstitute Naha16051 Tunisia

Coastal date palm cultivars are interesting through their soft dates, their abundant and earliest production than continental cultivars. Maintaining bio-diversity in Tunisian oases has become a subject of first interest in date palm cultivation in Tunisia. Coastal oases still retain a very rich and varied plant biodiversity in comparison with the continental oases, weakened by the mono cultivation of ＂Deglet Nour＂ cultivar. Study of soft date＇s composition can make there well known to date consumers, help to valorize there and to help of sustainability of coastal oases ecosystem. Fresh dates from 15 cultivars was collected, dried by 80 ~C in 20-24 h. Acidity was determinate by pH meter. Sugars were appreciated by enzymatic method. Ash and minerals was calculated by photometer and spectrometer. Chemical date composition study showed that coastal date palm cultivars are predominantly rich of carbohydrates, have a low quantity of sucrose which gives them an important dietary value. Their pH varies from 5 to 6, classifies them as the best date quality for fresh consumption. Their richness in Total Nitrogen Matters and total minerals makes them at almost the same level as the other date palm eultivars analyzed by different authors in different areas of date palm production. Mineral composition showed that these dates are K and P-rich and relatively poor in Na and Ca.

关键词： Dates coastal oases Tunisia chemical composition sugars Total Nitrogen minerals.

Nitrate-induced Biochemical and Histopathological Changes in the Liver of Rats:Ameliorative Effect of Hyparrhenia hirta

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Biomedical and Environmental Sciences 2014年第9期27卷 695-706页

作者： Hanen BOUAZIZ-KETATA Ghada ben salah Hichem ben salah Rim MARREKCHI Kamel JAMOUSSI Tahia BOUDAWARA Faiza FAKHFEKH Najiba ZEGHAL Animal Physiology Laboratory UR/11 ES70Sfax Faculty of SciencesUniversity of SfaxBP1171Sfax 3000Tunisia Laboratory of Human Molecular Genetics Faculty of MedicineSfax 3029Tunisia Laboratory of Chemistry Sfax Faculty of SciencesUniversity of SfaxBP1171Sfax 3000Tunisia Laboratory of Biochemistry CHU Hedi ChakerSfax 3029Tunisia Histopathology Laboratory University of SfaxCHU Habib BourguibaSfax 3029Tunisia

Objective The present study investigated the protective role of Hyparrhenia hirta （H. hirta） against sodium nitrate （NaNO3）-induced hepatoxicity. Methods Male Wistar rats were randomly divided into three groups： a control group and two treated groups during 50 d with NaNO3 administered either alone in drinking water or co-administered with H. hit＇to. Results NaNO3 treatment induced a significant increase in serum levels of glucose, total cholesterol and triglyceride while serum total protein level decreased significantly. Transaminases and lactate deshydrogenase activities in serum were elevated indicating hepatic cells＇ damage after treatment with NaNO3. The hyperbilirubinemia and the increased serum gamma glutamyl transferase activities suggested the presence of cholestasis in NaNO3 exposed rats. In parallel, a significant increase in malondialdehyde level along with a concomitant decrease in total glutathione content and superoxide dismutase, catalase and glutathione peroxidase activities were observed in the liver after NaNO3 treatment. Furthermore, nitrate caused a significant induction of DNA fragmentation. These modifications in NaNO3-treated rats corresponded histologically with hepatoceltular necrosis and mononuclear cells infiltration. H. hirta supplementation showed a remarkable amelioration of the abnormalities cited above. Conclusion The results concluded that the treatment with H. hirta had a significant role in protecting the animals from nitrate-induced liver dysfunction.

关键词： Antioxidant Hyparrhenia hirta Liver Nitrate toxicity Oxidative stress Rat

Architecter Study of the Young Date Palm （Phoenix dactylifera L.） Root System

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Journal of Life Sciences 2014年第5期8卷 425-432页

作者： JRAD Amira ben salah Mohamed Department of Biology Faculty of Sciences of Tunis University Campus Tunis ElManar 2092 Tunis Experimental Station of Arid Lands Institute of Gabe Gabes Nahal 6051 Tunis

The architectural analysis of the young date palm （Phoenix dactylifera L.） root system （its form and its structure）, is necessary to describe its principal functions of absorption and anchoring. In this study the authors present an analysis of the root branching process. It allows them to understand the distribution of inter-lateral root length on the radicle and to account the development of the root system in the soil. Root architecture was studied from samples sprouted naturally in the oases of Chott el Ferikh （Gabes） and other plants grown in polyethylene bags under the shadow. This analysis has showed five categories of roots belonging to four different topological orders in the youthful phasis.

关键词： Architecture Phoenix dactylifera L. root system root branching.

Modeling of Date Palm （Phoenix dactylifera L.） Vegetative Aerial Architecture, Example of Two Tunisian Cultivars

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Journal of Life Sciences 2014年第5期8卷 418-424页

作者： Sana Gammoudi René Lecoustre Mohamed ben salah Arid and Oases Cropping Laboratory Arid Lands Institute Medenine 4119 Tunisia UMR AMAP CIRAD-BIOS Boulevard de la Lironde TA AS1/PS2 - 34398 Montpellier Cedex 5 France

The present study was carried out to verify the statistical relationships between the characteristic parameters in terms of vegetative aerial architecture of the date palms for simulating realistic 3D models. The vegetal material was composed of two Tunisian varieties of Phoenix dactylifera L., ＂Barhi＂ and ＂Rochdi＂. The observations are taken place in Gabes and on one pair of palms per main stem and offshoot for each cultivar. The analysis of the characteristic dimensions of the pinnae and rachis allowed the determination of a minimum sample. The geometrical analysis confirmed the existence of a strong correlation between rotation angles and radial angles. The architectural analysis of the two Tunisian cultivars revealed that the distribution of characteristic parameter values of pinnae was the outcome ofa regionalized variable along the rachis. This statistical study of relationships between the characteristic parameters in terms of vegetative aerial architecture of the two varieties allows executing a new measurement protocol for computing and simulating realistic 3D models.

关键词： Phoenix dactylifera L. modeling architecture minimum sample correlation.

Assessment of the Energy Conversion on the Thermal Balance and Atmospheric Emissions in Ceramic Tile Product Industry in Tunisia: A Case Study

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Atmospheric and Climate Sciences 2020年第4期10卷 421-442页

作者： Imed ben salah Moufida ben M’barek Jemaï Aycer ben Saad Safa Mezza Department of Geology University of Sciences of Bizerte University of Carthage Tunis Tunisia

This work aims to assess the effect of energy conversion (Thermal oil, Natural gas and cogeneration system) on atmospheric emission and energy consumption in ceramic tile product sector in Tunisia. Two tile manufactures were selected. The first plant has two production lines: The first line (FF1) operates with thermal oil with a lower calorific value (LHV) of 9811 cal/g and the second line (FG1) operating with natural gas has a lower calorific value (HHV) of 10,520 cal/g, ensuring a daily output of 300 tons each one. The second manufacture (SC2) operates with natural gas with the same LHV value. The thermal oil energy balance showed a specific consumption of 0.0481 toe/ton tile product for the FF1 manufacture line, 0.0198 toe/ton of tile product for the FG1 manufacture line and 0.0143 toe/ton of tile product for the SC2 manufactory. The electrical energy consumption was 0.0121 toe/ton of tile product for the FF1 line, 0.0108 toe/ton of tile product for the FG1 line and a production of energy (exergy) of 0.014 toe/ton for the SC2 production line. The specific consumption was split into 40% for dryer and 60% for tunnel kilns. The conversion allow to record a dryer reduction rate of 80% for nitrogen oxides (NOx), 56% for sulfur oxides (SOx), 56% for fluorinated compounds, 52% for chlorinated compounds and 52% for volatile organic compound. Whereas, the kiln reduction rate was 36% for nitrogen oxides, 51% for sulfur oxides, 36% for chlorinated compounds and 55% for fluorinated and 50% for volatile organic compounds (VCOs). Compared to natural gas line, the use of cogeneration system in kiln process shows a decrease of 67% for NOx emissions, 80% for SOx emissions, 89% for fluorinated compounds, 58% for chlorinated emissions and 64% for volatiles organic compounds. Compared to thermal oil, the use of cogeneration system reduces the thermal energy consumption by 70% and allowed to save 30% of electric energy by generate 20% of needed electric energy. The specific atmospher

关键词： Ceramic Energy Conversion Cogeneration Energy Balance Atmospheric Emissions

New 3D Aware Formulation of MoM-GEC Method for Studying Planar Structures with Vertical Sources

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Journal of Electromagnetic Analysis and Applications 2016年第4期8卷 79-94页

作者： Oueslati Basma ben salah Taha Larbi Chiraz Aguili Taoufik Communication System Laboratory Sys’Com National Engineering School of Tunis University Tunis El Manar Tunis Tunisia

This paper proposes a generalization of the MoM-GEC method [1] needed for studying planar structures excited with a source located at perpendicular plan relative to circuit plan. A general formulation is detailed to allow modeling excitation of a planar structure with one or more sources located in plans other than the circuit plan. The numerical approach elaborated is based on the definition of new admittance operators and rotational transformations describing the transition from one plan to another. To validate this approach, we consider the case of a single source located in the perpendicular plan to the circuit.

关键词： Admittance Operator MoM-GEC 3D Discontinuities Vertical Source

Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

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Nano-Micro Letters 2022年第7期14卷 209-227页

作者： Duo Pan Gui Yang Hala MAbo-Dief Jingwen Dong Fengmei Su Chuntai Liu Yifan Li ben Bin Xu Vignesh Murugadoss Nithesh Naik salah MEl-Bahy Zeinhom MEl-Bahy Minan Huang Zhanhu Guo Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon Tyne NE18STUK Integrated Composites Laboratory(ICL) Department of Chemical and Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Advanced Materials Division Engineered Multifunctional Composites(EMC)Nanotech LLCKnoxvilleTN 37934USA College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Mechanical and Manufacturing Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka 576104India Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Al-Azhar UniversityNasr CityCairo 11884Egypt

With the innovation of microelectronics technology, the heat dissipation problem inside the device will face a severe test. In this work, cellulose aerogel(CA) with highly enhanced thermal conductivity(TC) in vertical planes was successfully obtained by constructing a vertically aligned silicon carbide nanowires(SiC NWs)/boron nitride(BN) network via the ice template-assisted strategy. The unique network structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W m^(-1) K^(-1) at a low hybrid filler loading of 16.69 wt%, which was increased by 890% compared to pure epoxy(EP). In addition, relying on unique porous network structure of CA, EP-based composite also showed higher TC than other comparative samples in the horizontal direction. Meanwhile, the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35 × 10^(11) Ω cm and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of-21.5 dB and a wide effective absorption bandwidth(<-10 dB) from 8.8 to 11.6 GHz. Therefore, this work provides a new strategy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications.

关键词： Epoxy Ice template Vertical alignment Thermal conductivity Multifunctionality

健康支持城市设计的解剖学——对突尼斯城市的建筑环境、自然环境、社会凝聚力和健康进行多层次分析

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健康支持城市设计的解剖学——对突尼斯城市的建筑环境、自然环境...

作者： Yosra ben salah（尤拉）天津大学

学位级别：硕士

预测截止到2050年,全球将有三分之二的人口生活聚集在城市,面对日益显现和复杂化的公共健康问题,“基于健康支持的城市设计”成为一种可能。然而,在不可逆的城市化尤其是城市高密度的趋势下,城市建成环境如何影响健康应成为关注的重点... 详细信息

预测截止到2050年,全球将有三分之二的人口生活聚集在城市,面对日益显现和复杂化的公共健康问题,“基于健康支持的城市设计”成为一种可能。然而,在不可逆的城市化尤其是城市高密度的趋势下,城市建成环境如何影响健康应成为关注的重点。以此为背景,本研究通过解读健康城市内涵并构建城市建成环境对居民健康影响的理论框架,通过分析突尼斯城市建成环境现状特点及不足,从城市形态、土地功能、交通网络、社区设计和自然环境的城市设计策略。这将为突尼斯未来健康城市发展提供理论依据。首先,通过文献梳理和政策解读,从个体的健康行为、健康生活方式和社会凝聚层面解析城市对城市居民健康的影响,并构建城市建成环境对居民健康影响的理论框架;其次,以突尼斯首都突尼斯市为研究对象,通过统计和汇总大量政府数据土地利用、城市结构、城市肌理和道路系统的特征,梳理并提取了突尼斯市的建成环境现状特征;基于此,论文从城市形态设计层面提出综合考虑改善风环境、减少太阳辐射并提升热舒适度的健康支持设计策略;从城市土地利用层面提出土地复合利用、平衡职住用地的健康支持设计策略;从社区设计层面提出打造可步行性友好的设计策略;从城市交通层面提出完善社区慢性系统、公共交通运作高效的城市交通体系设计策略。最后,在突尼斯市“lac3”区域提出建设健康城市的设计方案。本文得到以下研究成果:第一,城市建成环境主要通过城市自然生态环境、影响居民社会凝聚力两个途径影响城市居民健康;第二,突尼斯作为经济、政治、文化中心,依旧存在城市规划与道路使用需求不匹配、城市结构松散、城市用地功能不合理等现象,这些都严重影响城市居民的生活健康和品质;第三,从城市形态、土地利用、城市交通、社区环境、城市自然环境5个方面提出了健康支持的城市设计策略。

关键词：健康支持城市设计建成环境自然环境社会融合