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Naked Eye and Selective Detection of Copper(II) in Mixed Aqueous Media Using a Cellulose-based Support

Chemical Research in Chinese Universities 2019年第4期35卷 598-603页

作者： FETTOUCHE Souad BOUKHRISS Aicha TAHIRI Mohamed cherkaoui omar BAZI Fathallaah GMOUH Said Laboratoire Recherche sur les Materiaux Textile(REN4TEX) Ecole Supeneure des Induseries de Textile et de L'habillement(ESITH)CasablancaBP 7731Maroc Laboratoire Hydrogeochimie et Bassin versant Faculte des Sciences Ain ChockUniversite Hassan IICasablancaB. P 5366Maroc Laboratore Chimie Analytique et Physico-chimie des Materiaux Faculte des Sciences Ben M'sik Universitie Hassan II CasablancaBP 150Macro Laboratoire d'lngeniene et Materiaux(LIMAT) Faculte des Sciences Ben MsikUniv er site Hassan IICasablanceBP 150Maroc

A new colorimetric sensor based-azo dye for Cu^2+ detection was synthesized and characterized by FTIR and NMR spectroscopies. The results showed that the azo dye had a high selective and sensitive recognition toward Cu^2+. The solution containing the sensor changed color from pink to pale yellow with a hypsochromic shift in the presence of Cu^2+. The sensor selectivity and sensitivity toward Cu^2+ ions were investigated by colorimetry and UV-Vis spectroscopy. For practical applications, a cellulosic textile test strip for high-selectivity detection of Cu^2+ ions in aqueous solution was developed using the synthesized azo dye as chromogenic chemosensor molecule, while using a solid cellulose textile as a substrate. As a result, a spectacular color change of the test strip was observed do pending on the amount of copper ions in contact with the strip, which allows an estimation of Cu^2+ concentration by naked eye.

关键词： Copper(II) ions detection Azo dye Chromogenic chemosensor Cellulose-based probe

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Polyester-supported Chitosan-Poly(vinylidene fluoride)-Inorganic-Oxide-Nanoparticles Composites with Improved Flame Retardancy and Thermal Stability

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Chinese Journal of Polymer Science 2020年第1期38卷 84-91,I0007页

作者： Ahmed Abed Nabil Bouazizi Stephane Giraud Ahmida El Achari Christine Campagne Olivier Thoumire Reddad El Moznine omar cherkaoui Julien Vieillard Abdelkrim Azzouz ENSAIT GEMTEX-Laboratoire de Genie et Materiaux TextilesF-59000 LilleFrance Laboratory LPMC Faculty of Science El JadidaChouaib Doukkali UniversityEl JadidaMorocco Laboratory REMTEX ESITHRouted'EI Jadidakm8BP 7731-OulfaCasablancaMorocco Normandie Univ. UNIROUENCNRSPBS(UMR 6270)55 rue Saint Germain27000 EvreuxFrance Normandie Univ. UNI ROUENINSA RouenCNRSCOBRA(UMR 6014)55 rue Saint Germain27000 EvreuxFrance Nanoqam Department of ChemistryUniversity of Quebec at MontrealQCCanada

Polyester(PET) was pre-activated by atmospheric air plasma and coated by various inorganic oxide nanoparticles(MOx) such as titanium dioxide(TiO2), zinc oxide(ZnO), and silicon oxide(SiO2), using poly(vinylidene fluoride)(PVDF) and chitosan(CT) as binders. The resulting PET-PVDF-MOx-CT composites were thermally compressed and then characterized by scanning electron microscopy, Fourier infrared spectroscopy, thermal gravimetric analysis, and flame retardancy(FR) ability tests. PET modifications resulted in more thermally stable and less harmful composites with weaker hazardous gas release. This was explained in terms of structure compaction that blocks pyrolysis gas *** incorporation was found to reduce the material susceptibility to oxidation. This judicious procedure also allowed improving flame retardancy ability, by lengthening the combustion delay and slowing the flame propagation. Chitosan also turned out to contribute to a possible synergy with the other polymers present in the synthesized materials. These results provide valuable data that allow understanding the FR phenomena and envisaging low-cost high FR materials from biodegradable raw materials.

关键词： Polyester nonwovens Composite PVDF Flame retardancy Material oxides Chitosan

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Pattern-Oriented Approach for Enterprise Architecture: TOGAF Framework

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Journal of Software Engineering and Applications 2012年第1期5卷 45-50页

作者： Mohamed Taleb omar cherkaoui 不详

Design pattern suggests that developers must be able to reuse proven solutions emerging from the best design practices to solve common design problems while composing patterns to create reusable designs that can be mapped to different types of enterprise frameworks and architectures such as The Open Group Architecture Framework (TOGAF). Without this, business analysts, designers and developers are not properly applying design solutions or take full benefit of the power of patterns as reuse blocks, resulting in poor performance, poor scalability, and poor usability. Furthermore, these professionals may “reinvent the wheel” when attempting to implement the same design for different types of architectures of TOGAF framework. In this paper, we introduce different categories of design patterns as a vehicle for capturing and reusing good analyses, designs and implementation applied to TOGAF framework while detailing a motivating exemplar on how design patterns can be composed to create generic types of architectures of TOGAF framework. Then, we discuss why patterns are a suitable for developing and documenting various architectures including enterprise architectures as TOGAF.

关键词： Design Patterns Enterprise Architecture TOGAF Framework

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工业4.0对全球供应链的影响研究 ——以摩洛哥为例

工业4.0对全球供应链的影响研究 ——以摩洛哥为例

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作者： omar cherkaoui 山东财经大学

学位级别：硕士

由于数字化转型的加速,全球化进一步推动了收入的增长。在目前情况下,由于COVID-19病毒的影响,供应链数字化转型开始显得至关重要。近来,作为生态系统多样化和工业化战略的一部分,工业4.0在一些国家越来越重要。本文首先讨论工业4.0的... 详细信息

由于数字化转型的加速,全球化进一步推动了收入的增长。在目前情况下,由于COVID-19病毒的影响,供应链数字化转型开始显得至关重要。近来,作为生态系统多样化和工业化战略的一部分,工业4.0在一些国家越来越重要。本文首先讨论工业4.0的设置以及文献中引用最广的先进创新,这些创新在工业4.0中起着至关重要的作用。然后重点分析供应链数字化的影响:成功因素和挑战因素。这将有助于企业确定其计划和实践,以有效地完成从传统供应链到数字供应链的转型。本文分析了这一领域的文献,以便了解这一模式并提出未来的研究方向。本文的研究目的是为了揭示供应链4.0和工业4.0对企业的影响,并研究它们之间的联系,从而为我们继续开展SC4.0应用对摩洛哥等新兴国家汽车企业工业绩效影响的研究提供了基础。

关键词：供应链4.0 智能物流工业4.0 汽车工业摩洛哥

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