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A Glassy Carbon Electrode Modified with Cellulose Nanofibrils from Ammophila arenaria for the Sensitive Detection of L-Trytophan

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Journal of Sensor Technology 2024年第3期14卷 35-50页

作者： Sondes Bourigua feriel Boussema Zayneb Jebali Houcine Barhoumi Hatem Majdoub Abderrazak Maaref Nicole Jaffrezic-Renault Laboratory of Advanced Materials and Interfaces Faculty of Sciences University of Monastir Monastir Tunisia Institute of Analytical Sciences University of Lyon Villeurbanne France

L-tryptophan is an essential amino acid for human health. Nanofibrillated cellulose (NFC) from marram grass (Ammophila arenaria) extracted from plants harvested in the center of Tunisia was used for the first time for the modification of a glassy carbon electrode (GCE), for the sensitive detection of L-tryptophan (Trp). After spectroscopic and morphological characterization of the extracted NFC, the GC electrode modification was monitored through cyclic voltammetry. The NFC-modified electrode exhibited good analytical performance in detecting Trp with a wide linear range between 7.5 × 10−4 mM and 10−2 mM, a detection limit of 0.2 µM, and a high sensitivity of 140.0 µA∙mM−1. Additionally, the NFC/GCE showed a good reproducibility, good selectivity versus other amino acids, uric acid, ascorbic acid, and good applicability to the detection of Trp in urine samples.

关键词： Nanofibrillated Cellulose Chitosan Chemically Modified Glassy Carbon Electrode Electrochemical Detection L-Tryptophan

High performance novel flexible perovskite solar cell based on a low-cost-processed ZnO:Co electron transport layer

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Nano Research 2020年第9期13卷 2546-2555页

作者： feriel Bouhjar Lotfi Derbali BernabéMari Institut de Disseny i Fabricació(IDF)-Departament de Fisica Aplicada Universitat Politecnica de Valenciciy Cami de Vera s/n46022 ValenciaSpain Photovoltaic Laboratory Research and Technology Centre of Energy(CRTEn)Borj-Cedria Science and Technology Parky BP 952050 Hammam-LifTunisia Laboratory of Semiconductors Nanostructures and Advanced TechnologyResearch and Technology Center of Energy(CRTEn)Borj-Cedria Science and Technology ParkBP 952050 Hammam-LifTunisia Department of Physics College of Sciences and HumanitiesAl QuwayiyahShaqraa UniversityAl QuwayiyahSaudi Arabia

In this work,high quality uniform and dense nanostructured cobalt-doped zinc oxide(ZnO:Co)films were used as electron-transport layers in CH3NH3Pbl3-based planar heterojunction perovskite solar cells(PSCs)on a flexible conductive *** photo catalytically active ZnO:Co films were prepared by a low cost hydrothermal process using the aqueous solution of zinc nitrate hexahydrate,hexamethylenete-tramine and cobalt(II)nitrate ***:Co films were deposited on indium tin oxide(ITO)covered polyethylene terephthalate(PET)flexible *** growth was controlled by maintaining the autoclave temperature at 150℃for 4 *** CH3NH3Pbl3 layer was deposited on the ZnO:Co films by spin ***-OMeTAD was employed as a hole-transporting *** structural,morphology and optical properties of the grown ZnO nanostructures were characterized by X-ray diffraction(XRD),field-emission scanning electron microcopy(FESEM),energy-dispersive X-ray spectrometry(EDX),ultraviolet-visible(UV-Vis)and photoelectrochemical *** spectra showed that both ZnO and ZnO:Co nanorods had a hexagonal wurtzite structure with a strong preferred orientation along the(002)*** surface morphology of films was studied by FESEM and showed that both the pure and Co-doped ZnO films had hexagonal shaped *** the steady state,the ZnO electrode gave a photocurrent density of about 1.5 mA/***,the Co-doped ZnO electrode showed a photocurrent density of about 6 mA/cm^2,which is 4-fold higher than that of the ZnO *** on the above synthesized Co-doped ZnO films,the photovoltaic performance of PSCs was *** Co-doped ZnO layers had a significant impact on the photovoltaic conversion efficiency(PCE)of the *** latter was attributed to an efficient charge separation and transport due to the better coverage of perovskite on the nanostructured Co-doped ZnO *** a result,the measured PCE under standard solar conditions(A M 1.5G,100 mW/cm^2)r

关键词： perovskite solar cell ZnO nanorods hydrotherm al deposition X-ray diffraction(XRD)analysis field-em ission scanning electron m icrocopy(FESEM)analysis photoelectrochem ical properties

Numerical Study on the Combined Use of Corten Steel and Phase Change Materials in Container-Type Houses

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Fluid Dynamics & Materials Processing 2023年第4期19卷 953-958页

作者： feriel Mustapha Marwa El Yassi Ikram El Abbassi Abdelhak Kaci Elhadj Kadri A-Moumen Darcherif LR2E Research Laboratory in Industrial Eco-Innovation and EnergeticsCergy95000France L2MGC Laboratory of Mechanic and Materials of Civil Engineering Cergy95000France Laboratory of QUARTZ(EA 7393) University of Paris-SeineCergy-Pontoise95014France

A study is presented on the feasibility of an approach based on the combination of Phase Change Materials(PCM)with metal walls in container-type *** line of research finds its motivations in recent trends in the energy and building sectors about energy consumption *** important objective concerns possible improvements in the comfort provided by such houses during the summer *** results obtained through numerical solution of the governing equations accounting for heat transfer and latent heat effects associated with the PCM show that the indoor temperature can be reduced with a varying degree of success depending on the considered conditions.

关键词： Metallic wall phase change materials corten steel thermal comfort

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放纵文化对消费者购物背景音乐偏好影响研究

放纵文化对消费者购物背景音乐偏好影响研究

作者： Zeghoud feriel 大连理工大学

学位级别：硕士

音乐是我们日常生活不可或缺的一部分,俗话说,音乐无国界,无论属于什么文化、宗教或种族,人们都有自己对音乐的喜爱和偏好。音乐能够调节情绪并在短时间内改变我们的思维模式,因此在企业营销实践中得到了广泛应用,例如很多国家的购物商... 详细信息

音乐是我们日常生活不可或缺的一部分,俗话说,音乐无国界,无论属于什么文化、宗教或种族,人们都有自己对音乐的喜爱和偏好。音乐能够调节情绪并在短时间内改变我们的思维模式,因此在企业营销实践中得到了广泛应用,例如很多国家的购物商场都会播放背景音乐。但是,阿尔及利亚却很少有商场播放背景音乐,阿尔及利亚的消费者似乎也并不喜欢在有背景音乐的环境中购物。由此可见,消费者在购物时对商场背景音乐的偏好存在着文化差异。根据上述问题,本研究基于文献回顾提出了研究假设,并通过三个研究进行假设验证。研究1通过实验法验证主效应,结果表明放纵文化能够对消费者的购物背景音乐偏好产生正向影响,属于放纵文化导向的消费者显示出更强的购物背景音乐偏好。研究2通过实验发进一步验证主效应以及中介作用,结果表明情感需要是放纵文化与购物背景音乐偏好之间的中介变量,放纵文化通过影响情感需要进而影响购物背景音乐偏好。研究3通过实验法验证主效应以及调节作用,结果表明产品类别是放纵文化与购物背景音乐偏好之间调节变量,在购买享乐型产品时,放纵文化对消费者购物背景音乐偏好的影响更加显著。本研究具有积极的理论意义和实践意义。本研究探明了放纵文化对购物背景音乐偏好的影响作用及其心理机制和边界条件,拓展了跨文化营销领域的研究。同时,本研究启示企业在选择是否播放背景音乐时要考虑放纵文化的因素,为企业跨文化营销提供实践指导

关键词：放纵文化背景音乐偏好情感需要消费者行为

The Study of the Influence of Load＇s Chemical Composition in the Coking Process on the Efficiency and the Quality of Coke

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Journal of Chemistry and Chemical Engineering 2011年第7期5卷 631-637页

作者： Hadj Mimoun Noredine Bentahar feriel Hennaoui Meriama Kerboua Laboratory research of technology of hydrocarbon University of Boumerdes Algeria

This research was performed in order to allow the study of the chemical composition influence of the coking process load on the efficiency and the quality of coke. For this reason, the coking of the following loads was realized： Atmospheric residue （RAT）, vacuum Residue （RSV） and catalytic Residue of cracking （RCC）. （The residues are obtained from an Algerian crude oil）. As the oil residues are rich for their strongly polar composition, such as the asphaltene resins, and complex structures units （SCU）, which has a role in the formation of coke, and as the dispersion of these latter improves the quality of coke, a study on the stability of aggregation was carried out by the addition of one stabilizer （oil Extract） in the coking process load, The Compounding （Extracted from/RCC oil） has been drived to the best efficiency of coke. The study consists of the influence this is characterized by the analyses Infra-red （IR） and x-ray diffraction （XRD）.

关键词： Coking oil residue dispersant aggregation stability.