دور الأستاذ الجامعي في تعزيز القيم الاخلاقية لدى الطلبة " دراسة تحليلية "
مقال في مجلة علمية

تلعب الجامعة دوراً مهماً في عملية تعزيز القيم لدى الطلاب ، ودورها لايقل أهمية عن دور الأسرة حيث تمتاز عن غيرها في عملية التنمية الأخلاقية ، وهي تتحمل دوراً مهماً في تأهيل هولاء الشباب لتلك القيادة في مسيرة التقدم والحضارة سواء كان هذا الدور يتمثل في الجوانب الأكاديمية والعملية ، أم كان يتعلق بالقيم والأخلاق التي تدفعهم للعمل ضمن إطر وأدلة تعينهم في مسيرتهم نحو التطوير ، كما ينبغي أن تقوم جامعاتنا بدورها ويجب أن يعي الأساتذة فيها القيم التي يؤكد عليها المجتمع وتحتاجها التنمية في ظل ثوابت التربية الاسلامية.

هاجر أحمد ميلاد الشريف، (03-2020)، المجلة العلمية المحكمة لكليات التربية: جامعة الزاوية، 17 (2)، 174-188

Conformational stability of 5-substituted orotic acid derivatives analysed by measuring 13C NMR chemical shifts and applying linear free energy relationships
Journal Article

Conformational stability of various 5-substituted orotic acid derivatives was studied by applying linear free energy relationships (LFER) to the 13C NMR chemical shifts. The correlation analysis for the substituent-induced chemical shifts (SCS) with inductive (σI), and various resonance (σR) parameters were carried out through Single Substituent Parameter (SSP) and Dual Substituent Parameter (DSP) methods, and multiple regression analysis. Good Hammett correlations for all carbons were obtained, while electrophilic substituent constants better fitted for C2 carbon with electron-donor substituents. Conformational analysis of various derivatives using RB3LYP/6-311++G (3df,3dp) DFT method, together with 13C NMR data suggests that most of the substituted orotic acid derivatives exist in planar conformation, except nitro and alkyl substituted derivatives. Internal rotation of carboxylic group showed significant impact on the extent of conjugative interaction making syn conformation more stable in all the derivatives studied. Further, of all 5-substituted orotic acid derivatives, diketo form proved to be the most stable form compared to zwitterionic and enol tautomeric forms. Optimized geometries and transmission effects of particular substituent through well-defined π-resonance units suggest that these units behave as isolated as well as conjugated fragments, depending on the type of substituent

Fathi Assaleh, Aleksandar D. Marinković, Jasmina Nikolić, Nevena Ž.Prlainović, Saša Drmanić, Mohammad M.Khan, Bratislav Ž. Jovanović, (12-2019), Arabian Journal of Chemistry: Elsevier, 12 (8), 3357-3366

Solvatochromism and azo–hydrazo tautomerism of novel arylazo pyridone dyes: Experimental and quantum chemical study
Journal Article

The state of the tautomeric equilibria of eleven arylazo pyridone dyes was evaluated from UV–Vis absorption spectra with the aid of the quantum mechanical modeling. NMR analysis and theoretical calculations, by using PCM/ωB97X-D/6-311G(d,p) method, confirmed that prepared compounds exist mainly in Hydrazo form. Internal hydrogen bonding in Hydrazo tautomer, analyzed by AIM topological analysis and total electron density at the bond critical point (BCP), confirmed a presence of strong hydrogen bond which contributes to higher stability of Hydrazo form. Linear solvation energy relationships (LSERs) rationalized solvent influence on solvatochromism of all compounds in Hydrazoform and KT by using Kamlet–Taft model. Linear free energy relationships(LFERs) were applied to the substituent-induced NMR chemical shifts (SCS) using SSP (single substituent parameter) and DSP (dual substituent parameter) model. Density plots over the highest occupied (HOMO) and lowest unoccupied molecular orbitals (LUMO) energy surface provide information on the charge transfer during excitation. The molecular electrostatic potential (MEP) surface map was plotted over the optimized geometry of the molecules in order to visualize electron density distribution and explain origin of solvent/solute interactions.

Ismail Ajaj, Fathi Assaleh, Jasmina Markovski, Milica Rančić, Danijela Brkoviće, Miloš Milčić, Aleksandar D. Marinković, (12-2019), Arabian Journal of Chemistry: Elsevier, 12 (8), 3463-3478

دور الأنشطة المدرسية في تنمية المبادئ التربوية لدى طلاب التعليم المتوسط
مقال في مجلة علمية

تؤدي الأنشطة المدرسية إلى تحقيق العديد من الوظائف الأخلاقية والتربوية ، حيث أنها جزءاً مكملاً للمناهج الدراسية ، ويعول عليها كثيراً في تنميتها لجوانب شخصيات الطلاب بطريقة أكثر واقعية وتلقائية حيث ينخرطون للعمل فيها بعيداً عن الروتين والشكلية ويمارس من خلالها الطلبة العديد من القيم مثل : التعاون وحب الآخرين والأمانة وحب العمل وبذلك تحقق المدرسة الاستقرار النفسي والاجتماعي للطلاب 

هاجر أحمد ميلاد الشريف، (12-2019)، مجلة الأكاديمية للعلوم الانسانية والاجتماعية: الأكاديمية الليبية، 17 (1)، 60-76

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Conference paper

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Trial Staff, uihuhi, (04-2019), Ipsa perferendis de: Libyan Academy, 10-20

تصور مقترح لدور الخدمة الاجتماعية في تأصيل الهوية الثقافية لطلاب المرحلة الثانوية "دراسة تحليلية"
مقال في مؤتمر علمي

الملخص : أدت التغيرات الثقافية إلى اختلال في كثير من القيم والمفاهيم الاجتماعية فبعد أن كان الشباب يكتسب قيمه من الأسرة والمدرسة أصبح يكتسبها من قنوات متعددة خاصة مع التطور التكنولوجي وتعدد وسائل الاتصال ، لذلك تعتبر المؤسسات التعليمية ركيزة أساسية في دعم الشخصية والمحافظة على الهوية الثقافية وتأهيلها في نفوس الطلاب .  

هاجر أحمد ميلاد الشريف، (07-2018)، مجلة كلية الآداب جامعة الزاوية: جامعة الزاوية، 121-154

Detailed solvent, structural, quantum chemical study and antimicrobial activity of isatin Schiff base
Journal Article

The ratios of E/Z isomers of sixteen synthesized 1,3-dihydro-3-(substituted phenylimino)-2H-indol-2-one were studied using experimental and theoretical methodology. Linear solvation energy relationships (LSER) rationalized solvent influence of the solvent–solute interactions on the UV–Vis absorption maximashifts (νmax) of both geometrical isomers using the Kamlet-Taft equation. Linear free energy relationships (LFER) in the form of single substituent parameter equation (SSP) was used to analyze substituent effect on pKa, NMR chemical shifts and νmax values. Electron charge density was obtained by the use of Quantum Theory of Atoms in Molecules, i.e. Bader's analysis. The substituent and solvent effect on intramolecular charge transfer (ICT) were interpreted with the aid of time-dependent density functional (TD-DFT) method. Additionally, the results of TD-DFT calculations quantified the efficiency of ICT from the calculated charge-transfer distance (DCT) and amount of transferred charge (QCT). The antimicrobial activity was evaluated using broth microdilution method. 3D QSAR modeling was used to demonstrate the influence of substituents effect as well as molecule geometry on antimicrobial activity

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Dominik R. Brkić, Aleksandra R. Božić, Aleksandar D. Marinković, Miloš K. Milčić, Nevena Ž. Prlainović, Fathi .H .O Assaleh, Ilija N. Cvijetić, Jasmina B. Nikolić, Saša Ž.Drmanić, (05-2018), Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy: Elsevier, 196 (5), 16-30

Multivariate assessment of azo dyes' biological activity parameters
Journal Article

Lipophilicity as key molecular descriptor of potential biological activity for selected derivatives of azo dyes was determined mathematically, by using relevant software packages and by reversed-phase thin-layer chromatography (RPTLC) on C18 and cyano modified carriers in mixtures of water/n-propanol and water/acetone. The obtained chromatographic parameters, RM0 and m, of the examined azo dyes were correlated with the standard measure of lipophilicity, log P, important pharmacokinetic predictors and selected toxicity parameters applying linear regression analysis. Thereby, good correlations for each applied system were obtained (average correlation coefficient, r, 0.944, 0.885 and 0.919). Also, the correlations between the studied parameters of azo dyes were examined applying two multivariate methods (Cluster Analysis and Principal Component Analysis). It was shown that the polarity of the substituent, and to a lesser extent its electronic effects has the greatest influence on the studied parameters of the azo dyes derivatives. Multivariate methods pointed out the similarity of the chromatographic retention constant, RM0, with the parameters of lipophilicity, unlike the chromatographic parameter m, which exhibits better agreement with the toxicity parameters.

Gyöngyi Vastag, Suzana Apostolov, Borko Matijević, Fathi Assaleh, (05-2018), Journal of Chromatography B: Elsevier, 1084 (1084), 141-149

QSRR approach in examining selected azo dyes
Journal Article

Azo dyes as the most numerous and widely applied class of synthetic dyes in various industries at the same Azo dyes as the most numerous and widely applied class of synthetic dyes in various industries at the same time represent the great polluter of the aquatic systems and environment. Most of them are hydrophobic and resistant to degradation, but also they express diverse biological activity. The preliminary examinations of the bioactivity of the compounds include the estimation of their lipophilicity. The lipophilicity, as the key molecular descriptor for assuming an activity in a biological system for group of thiouracil azo dyes, was determined by the reversed-phase thin-layer chromatography (RPTLC18F254s) in different mixtures of water and (ethanol, i-propanol, dioxane, tetrahydrofurane) and mathematically using relevant software packages. The insight into the relationship between the chromatographic retention parameters, R0m and m of azo dyes with the partition coefficient log P, was attained by applying the linear regression analysis, Cluster analysis, and principal component analysis. All the applied methods have resulted in good agreements of the studied lipophilicity parameters of azo dyes. Also, these methods provided significant informations about the influence of the organic modifier on one side as well as the impact of the polarity and the electronic effect of substituent of examined dyes on their lipophilicity.

Graphical abstract

 

KEYWORDS: Chromatographic retention parametersHammett substituent constantlog Pmultivariate methodsthiouracil azo dyes

Gyöngyi Vastag, Suzana Apostolov, Borko Matijević, Fathi Assaleh, (10-2016), Journal of Liquid Chromatography & Related Technologies: Taylor & Francis Group, 39 (14), 674-681

Problem Solutions of Phase Ambiguity and Initial Phase Shifts of the Phase Radio Navigation System for Aircraft Blind Landing
Journal Article

This work is a continuation of a design of a phase radio navigation system for aircraft blind landing in case of nonequipped runways proposed in [1], where, the proposed system is based on measuring the phase shifts of signals received from four ground transmitters (antennas), placed on corners of the runway strip, which provide distance measurements accuracy in millimeters. However, there are two important points that need serious consideration. First, the phase measurement is going to give the total phase () ϕ ρ−

 

0, while the actual phase shift of interest is ‘ϕ’, 0 ρ is the transmitter initial phase. The second problem is that, the measured phase angle () ϕ ρ− 0 between the transmitted and the received signal can only be measured in the interval from 0 to π 2 radians, this problem is called phase ambiguity. The answer of these problems lies in the use of more than one frequency (signal). Two sinusoidal signals with different frequencies (1f and 2f) but the same initial phase can be used. Taking the difference of the measured phases, the initial phase 0 ρ can vanish. To get around phase ambiguity would be to make sure that the actual phase difference 12 ϕ∆ does not exceed π 2, this technique called equivalent or synthetic wavelength.

S Sasi, NA Shashoa, (03-2015), IJISET: IJISET, 2 (3), 10-20