Faculty of sciences and technology

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    1-Formyl-3-phenyl-5-(4-isopropylphenyl)-2-pyrazoline: Synthesis, characterization, antimicrobial activity and DFT studies
    (2016-05-13) Amel Messai
    The structure of 1-formyl-3-phenyl-5-(4-isopropylphenyl)-2-pyrazoline synthesized as single crystal was investigated by FTIR, NMR, XRD. Experimental data were complemented by quantum mechanical calculations. XRD data show that the compound crystallizes in the triclinic system (P 1) via trans isomer (a ¼ 6.4267(4) Å, b ¼ 10.9259(12) Å, c ¼ 12.4628(9) Å and a ¼ 102.894(8) , b ¼ 102.535(6) , g ¼ 101.633(7) ). Anti-microbial screening results indicate that the compound shows promising activity. The theoretically predicted and experimentally obtained parameters reveal further insight into pyrazoline systems
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    1ères journées nationals d’étude sur la chimie théorique et ses applications JCTA1-21
    (Université de Khenchela, 2021-12-13) Lekmine Farid
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    2-Methylanilinium nitrate
    (2007) BOUSSEKINE Houda
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    3-Hydroxyanilinium hydrogensulfate
    (2017-06-13) Amel Messai
    In the title compound, C6H8NO+ HSO4ÿ, there is an intricate cation–cation, cation–anion and anion–anion three-dimensional hydrogen-bond network.
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    4-Methylanilinium nitrate
    (2009) BOUSSEKINE
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    (4S)-4-Benzyl-N-{[(4S)-4-benzyl-2-oxo-1,3-oxazolidin-3- yl]sulfonyl}-2-oxo-1,3-oxazolidine-3-carboxamide
    (2010) Amani Direm
    Acta Crystallographica Section E: Structure Reports Online is the IUCr’s highly popular open-access structural journal. It provides a simple and easily accessible publication mechanism for the growing number of inorganic, metal-organic and organic crystal structure determinations. The electronic submission, validation, refereeing and publication facilities of the journal ensure very rapid and high-quality publication, whilst key indicators and validation reports provide measures of structural reliability. In 2007, the journal published over 5000 structures. The average publication time is less than one month.
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    (4S)-4-Benzyl-N-{[(4S)-4-benzyl-2-oxo-1,3-oxazolidin-3yl]sulfonyl}-2-oxo-1,3-oxazolidine-3-carboxamide
    (2010-06-01) Malika Berredjem
    The title compound, C 21 H 21 N 3 O S, contains an oxazolidinone ring and a sulfonamide group, both characteristic for biologically and pharrmaceutically active compounds. Both stereogenic centres reveal an S absolute configuration. The two oxazolidinone rings are in an envelope conformation with the methylene carbon flap atoms deviating by 0.428 (1) and 0.364 (2) A 7 ˚ from the best least-square planes formed by the four other ring atoms. An intramolecular N—H O hydrogen bond contributes to the folded conformation of the molecule. In the crystal, weak intermolecular C—H O interactions connect the molecules into helices along the the twofold screw axes.
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    A Category-theoretic Approach to Organization-based Modeling of Multi Agent Systems on the Basis of Collective Phenomena and Organizations in Human Societies
    (2016-06-30) Abderrahim Siam
    This paper presents an idea of using category theory for developing organizational multi-agent systems by taking inspiration from collective phenomena and organizations in human societies. Category theory is used for studying and formalizing organizations and collective phenomena in human societies with the aim of capturing their logics into categorical models. Afterward, the captured models are mapped categorically to categorical MAS organizational models. This way of thinking allows studying properties of result MAS organizational models as well as properties of organizations in human societies such as stability and adaptation before taking them as landmarks for developing MAS organizational models.
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    A comparative study of two novel unsymmetrically substituted triazacyclohexanes
    (2017-03-06) Amel Messai
    ovel unsymmetrically N-substituted N,N0-R1N00-R2-1,3,5-triazacyclohexanes (1b and 2b; R1 ¼ p-chlorophenyl or p-methoxyphenyl and R2 ¼ butyl or cyclohexyl) have been synthesized in a good yield from condensation reaction by excess amine. Both triazacyclohexane rings have chair conformation. However, 1b adopts diaxial orientation of aryl groups and an equatorial form of alkyl group whereas 2b prefers an axial orientation of the alkyl group and diequatorial forms of aryl groups. 1b is consolidated by weak CH/p interactions. Intra-molecular C-H/O or C-H/N hydrogen bonds and C-H/p may be effective in the stabilization of 2b. Both compounds have showed moderate antimicrobial activity, but 1b exhibits higher activity than 2b. All experimental results are found in good support to theoretical data. Findings of research may be helpful guide for the medicinal chemists and the field is further open for pharmacokinetics studies.
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    A comparative study of two novel unsymmetrically substituted triazacyclohexanes
    (2017-02-27) Hanane Lamraoui
    Novel unsymmetrically N-substituted N,N0-R1N00-R2-1,3,5-triazacyclohexanes (1b and 2b; R1 ¼ p-chlorophenyl or p-methoxyphenyl and R2 ¼ butyl or cyclohexyl) have been synthesized in a good yield from condensation reaction by excess amine. Both triazacyclohexane rings have chair conformation. However, 1b adopts diaxial orientation of aryl groups and an equatorial form of alkyl group whereas 2b prefers an axial orientation of the alkyl group and diequatorial forms of aryl groups. 1b is consolidated by weak CH/p interactions. Intra-molecular C-H/O or C-H/N hydrogen bonds and C-H/p may be effective in the stabilization of 2b. Both compounds have showed moderate antimicrobial activity, but 1b exhibits higher activity than 2b. All experimental results are found in good support to theoretical data. Findings of research may be helpful guide for the medicinal chemists and the field is further open for pharmacokinetics studies.
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    A comparative study of two polymorphs of L-aspartic acid hydrochloride
    (2014-06-05) Rim Benali-Cherif; Takouachet Radhwnae; Nourredine Benali-Cherif
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    A Comparative Theoretical and Spectroscopic Study of Aminomethylbenzoic Acid Derivatives as Potential NLO Candidates †
    (2020-11-13) Amani Direm
    Three aminomethylbenzoic acid derivatives were theoretically studied at M062X/6-311++G(d,p) level in a vacuum, namely 2-ammonio-5-methylcarboxybenzene perchlorate (1), 4-(ammoniomethyl) carboxybenzene nitrate (2) and 4-(ammoniomethyl)carboxybenze perchlorate (3). The compounds’ structures were fully optimized and compared with the single-crystal X-ray diffraction results, showing a very close agreement with the experimental structural parameters. Their IR, 1H- and 13C-NMR spectra were calculated and examined in detail. Furthermore, the molecular electrostatic potential (MEP) maps of the studied compounds were investigated and the strength of the non-covalent interactions evaluated. In addition to these results, the NLO properties of the three compounds were predicted.
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    A Comparative Theoretical and Spectroscopic Study of Aminomethylbenzoic Acid Derivatives as Potential NLO Candidates †
    (2020-12-25) Amani Direm
    Three aminomethylbenzoic acid derivatives were theoretically studied at M062X/6-311++G(d,p) level in a vacuum, namely 2-ammonio-5-methylcarboxybenzene perchlorate (1), 4-(ammoniomethyl) carboxybenzene nitrate (2) and 4-(ammoniomethyl)carboxybenze perchlorate (3). The compounds’ structures were fully optimized and compared with the single-crystal X-ray diffraction results, showing a very close agreement with the experimental structural parameters. Their IR, 1H- and 13C-NMR spectra were calculated and examined in detail. Furthermore, the molecular electrostatic potential (MEP) maps of the studied compounds were investigated and the strength of the non-covalent interactions evaluated. In addition to these results, the NLO properties of the three compounds were p
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    A coordinate approach in intrusion detection systems
    (2022)  M. Bouchareb Abir Nihal  M. Hanou Selma
    With the evolution of computer, information and networks, the vulnerability to intrusions has increased. In order to face this phenomenon, several works and researches were born. The main objective of this study is the detection of intrusion to secure a local network by using a network of IDSs based on multi-agent systems and an Open Source IDS, which is the SNORT. In this work we propose a coordinate approach in intrusion detection, that have combined the use of several technologies, among other the development of distributed applications, consultation of a database (JDBC), and intrusion detection systems.
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    A coordinate approach in intrusion detection systems
    (2021) M. Bouchareb Abir Nihal M. Hanou Selma
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    A Discrete Crow Search Algorithm for Mining Quantitative Association Rules
    (2021) Abderrahim Siam
    Associationrulesarethespecificdataminingmethodsaimingtodiscoverexplicitrelationsbetweenthe differentattributesinalargedataset.However,inreality,severaldatasetsmaycontainbothnumericand categoricalattributes.Recently,manymeta-heuristicalgorithmsthatmimicthenaturearedeveloped forsolvingcontinuousproblems.Thisarticleproposesanewalgorithm,DCSA-QAR,formining quantitativeassociationrulesbasedoncrowsearchalgorithm(CSA).Toaccomplishthis,newoperators aredefinedtoincreasetheabilitytoexplorethesearchingspaceandensurethetransitionfromthe continuoustothediscreteversionofCSA.Moreover,anewdiscretizationalgorithmisadoptedfor numericalattributestakingintoaccountdependenciesprobablythatexistbetweenattributes.Finally, toevaluatetheperformance,DCSA-QARiscomparedwithparticleswarmoptimizationandmono andmulti-objectiveevolutionaryapproachesforminingassociationrules.Theresultsobtainedover real-worlddatasetsshowtheoutstandingperformanceofDCSA-QARintermsofqualitymeasures.