Synthesis, characterisation and antimicrobial activity of a new 1,3-bis (4-fluorophenyl)-5-butyl-1,3,5-triazacyclohexane

فرحاتي امال, 

Résumé: In this paper, a new hexahydrotriazine derivative which have the structure 1,3-bis(4-fluorophenyl)-5-butyl-1,3,5-triazacyclohexane was synthesized by the condensation reaction of a 1 :2 :1 ratio, 4-fluoroaniline and butylamine with formalin in a basic solution. The synthesized compound was characterized by elementary analysis and spectroscopic methods IR, UV, mass spectroscopy, 1H and 13C NMR. The new triazacyclohexane has been screened for its antimicrobial activity against Gram positive and Gram negative bacteria by the diffusion on agar medium.

Mots clés: triazacyclohexane ; formalin ; butylamine ; antimicrobial activity ; condensation

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Transmission and Q-factor improvement in 2D square photonic crystal demultiplexer

Mirouh Fatima Zohra,  Lebbal Mohamed Redha,  Bouchemat Mohamed,  Bouchemat Thouraya, 

Résumé: Our novel designed structure is a demultiplexer of 2D square photonic crystal (PC) of circular rods embedded in air in which we have created three resonant cavities with different radiuses. So we have three channels based on these cavities which have been implemented to realize the desired demultiplexer structure. The three radiuses of cavities deduce us to obtain three different output resonant wavelengths; it means that this structure drops the desired wavelength depending on the cavity radius. The refractive index n that we will use in this study have a constant value, n = 3.3763. In addition, we had optimized this structure by the variation of the adjacent rods radiuses and positions for each of these cavities. The obtained result is a structure with geometrically three different resonance zones. Then, we were being able to extract three resonant wavelengths characterized by a high transmission power T and Q-factor which the mean values are 91% and 4247 respectively. We denote that this resulting T and Q-factor are higher than those investigated in bibliography.

Mots clés: Photonic Crystal ; Demultiplexer ; 2D-FDTD ; Cavity ; Q-factor

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Beneficial effect of gallic acid on oxidative stress and chronic hepatotoxicity induced by carcinogenic benzopyrene in rats.

بن شويب إلهام,  لحول مصباح, 

Résumé: Benzo[a]pyrene is an environmental pollutant, well known for its powerful genotoxic and carcinogenic effects in various organs. Gallic acid, a widely distributed phenolic acid, possesses strong antioxidant, anti-inflammatory and anti-carcinogenic activities. This study investigated the effects of gallic acid on chronic liver injury induced by benzo[a]pyrene in Wistar rats. The intoxicated group received an intraperitoneally single dose of benzo[a]pyrene at 100 mg/kg, while the treated animals were intraperitoneally injected with benzo[a]pyrene at 100 mg/kg and then they orally received gallic acid at 100 mg/kg per day for five consecutive days. The liver toxicity was assessed by evaluation of the serum hepatic markers (alanine aminotransferase and aspartate aminotransferase), the enzymatic and nonenzymatic oxidative stress indicators and the histopathological changes. The benzo[a]pyrene administration increased the levels of malondialdehyde with a concomitant decrease in superoxide dismutase, glutathione-s-transferase and glutathione. Parralelly, liver histological alterations were observed. The animals treatment with gallic acid restored the alterations in liver tissues, decreased lipid peroxidation and serum marker enzyme activity and significantly improved the overall antioxidant capacity, suggesting that gallic acid was responsible of a beneficial effects against oxidative stress and hepatotoxicity induced by benzo[a]pyrene in rat.

Mots clés: Carcinogen ; benzopyrene ; gallic acid ; oxidative stress ; hepatotoxicity ; rat

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Crystallographic characterization of the spinel system CuyCryZr2-ySe4 by X-ray diffraction

بن الشيخ راضية,  بلعكروم كريمة, 

Résumé: Polycrystalline CuCr2Se4 spinels with Zr admixtures have been prepared by solid-state reaction, with an aim to study the influence of zirconium concentration on the cation distribution of the Cu-Cr-Zr-Se system. A series of samples of the chemical composition CuyCryZr2-ySe4 (y = 1.00, 1.15, 1.20, 1.25 and 1.30) have been studied by x–ray diffraction. The structural refinements have been performed according to the Rietveld method. In the system CuyCryZr2-ySe4 (y = 1.05, 1.15, 1.20, 1.25 and 1.30), the formula indicates a copper excess with respect to the ideal spinel composition. It is important to point out that CuyCryZr2-ySe4 retains the normal cubic spinel structure with increase in Cr substitution up to y = 1.0, with space group Fd3 ̅m. The formula of the spinel system CuyCryZr2-ySe4 indicates a copper excess, with respect to the ideal spinel composition. The question whether short metal-metal distances is discussed. It was found that the lattice parameter decreases with increasing y, and it doesn’t obey Vegard’s law. Also the variation of the cation distribution has been discussed on the basis of site preference, and the substituting cations. The data given in this paper provide structural support for further studies on magnetic measurements and explanations of the interesting properties of this family of compounds.

Mots clés: CuyCryZr2-ySe4; ; spinel structure; ; Rietveld refinement; ; X-ray powder diffraction

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Structural, Electronic and Magnetic Properties of quaternary Heusler compounds CoYFeZ and CoYMnZ (Z = Si, Ge, Ga and Al): An ab-initio Study

Torrichi Mohamed , 

Received date: 16-11-2018    Publication date: 04-07-2019    pages  10-15.   

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A Hybrid Optimization Approach to Interaction Parameter Identification in thermodynamic model problems

Merzougui Abdelkrim ,  Regabe Slimane , 

Received date: 19-11-2018    Publication date: 04-07-2019    pages  16-21.   

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Structural Characterization of Sol Gel-Synthesized ZnO Nano Powders With Different Sources of Al Doping

Mahcene Fatima ,  Chari Abdelhamid ,  Hioual Ouided ,  Belabed Naoual ,  Kasouit Samir , 

Received date: 18-03-2019    Publication date: 04-07-2019    pages  22-27.   

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Growth and properties of SnO2 thin films obtained by spray pyrolysis technique

Bendahmane Bouteina ,  Touidjen Nour El Houda ,  Mansour Farida , 

Received date: 18-03-2019    Publication date: 04-07-2019    pages  28-35.   

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Investigation of biocompatible polymer poly(caprolactone)-chitosan as nanolayer contain vitamin E with Two methods of electrospinning and finishing.

Saeidi Zahra ,  Ashjaran Ali , 

Received date: 08-04-2018    Publication date: 04-07-2019    pages  36-46.   

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Hydrochemical characterization of Gareat-El-Tarf plain groundwaters, northeastern, Algeria

Ouldammar Hanane ,  Houha Belgacem , 

Received date: 31-01-2018    Publication date: 04-07-2019    pages  47-51.   

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Study of Interface Trapped Charges effect on Performance of Junction Less Trial Material Cylindrical Surrounding-Gate MOSFETs

Lagraf Fairouz ,  Rechem Djamil ,  Guergouri Kamel , 

Received date: 23-07-2018    Publication date: 04-07-2019    pages  52-58.   

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The impact of wall emissivity on the thermal and dynamic behavior of an air channel integrated into the roof

Ababsa Dalila , 

Received date: 06-12-2018    Publication date: 04-07-2019    pages  59-69.   

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Double-diffusive natural convection in an inclined bi-L-shaped layered porous media: Darcy-Brinkman-Forcheimer model

Djezzar Mahfoud ,  Latreche Abdelkrim , 

Received date: 09-06-2018    Publication date: 04-07-2019    pages  70-80.   

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Growth rate influence on indium oxide thin films grown by an ultrasonic spraytechnique.

Attaf Abdallah ,  Azizi Rahil ,  Saidi Hanane ,  Benkhetta Youcef ,  Bouhaf Kherkhachi Imane ,  Attaf Nadir ,  Dahnoun Mohamed , 

Received date: 20-02-2019    Publication date: 04-07-2019    pages  81-88.   

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Heat transfer study in binary alloys solidification Pb-Sn and Pb-Sb

Adouane Samira ,  Kerboub Abdelhak ,  Belbacha El-djemai , 

Received date: 05-03-2019    Publication date: 04-07-2019    pages  89-96.   

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Propagation caracteristics of interaction of chirped vector soliton trains in birefringent optical fibers with variable coefficients in the presence of third and fourth order dispersion and quintic nonlinearity

Aziez Siham , 

Received date: 25-06-2018    Publication date: 04-07-2019    pages  97-106.   

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Investigation of Temperature Anisotropy in Highly-Magnetized Plasma

Amel Benahmed ,  Abdelaziz Sid , 

Received date: 19-10-2018    Publication date: 04-07-2019    pages  107-112.   

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