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Essential oil of <i>Thymus vulgaris</i>L. and <i>Rosmarinus officinalis</i>L.: Gas chromatography-mass spectrometry analysis, cytotoxicity and antioxidant properties and antibacterial activities against foodborne pathogens

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Natural Science 2013年第6期5卷 729-739页

作者： Hanene Miladi Rihab Ben Slama Donia Mili sami zouari Amina Bakhrouf Emna Ammar Laboratory of Analysis Treatment and Valorisation of Environment Polluants and Products Faculty of Pharmacy Monastir Tunisia Laboratory of Biochemistry Faculty of Medicine Monastir Tunisia Range Ecology Laboratory Arid Land Institute of Medenine Medenine Tunisia UR Study & Management of Urban and Coastal Environments LARSEN—National Engineering School Sfax Tunisia

The essential oil composition of Thymus vulgaris L. and Rosmarinus officinalis L. endemic to France were determined by GC and GC-MS. Oils were assessed for their cytotoxic, antioxidant and antimicrobial activity. 31 and 37 different compounds were identified representing 99.64% and 99.38% of the thyme and rosemary oils respectively, where oxygenated monoterpenes constituted the main chemical class. Thymol (41.33%) and 1.8-cineole (24.10%) were identified as the main constituents of T. vulgaris L. and R. officinalis L., respectively. Essential oils (EOs) of selected plant species were evaluated for their in vitro cytotoxicity against the human lung adenocarcinoma epithelial cell line (A549). Cytotoxicity was measured using MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphynyltetra-zolium bromide] colorimetric assay. Dose-dependent studies revealed IC50 of 8.50 ± 0.01 μg/mL and 10.50 ± 0.01 μg/mL after 72 h on the A549 cells for R. officinalis L. and T. vulgaris L., respectively. Antioxidant activity was determined using a quantitative DPPH (1,1-diphenyl- 2-picryl hydrazyl) assay. Thymus and rosemary EOs exhibited effective radical scavenging capacity with 50% inhibitory concentration (IC50) of 437 ± 5.46 μg/mL and 189 ± 2.38 μg/mL respectively and therefore acts as a natural antioxidant agent. The antimicrobial activity of these species has also been studied against several foodborne pathogens and food isolated Salmonella spp. including S. enteritidis of significant importance. According to the results, T. vulgaris L. showed higher bactericidal effect than those from R. officinalis L. These results suggest that the essential oil from T. vulgaris L. and R. officinalis L. have potential to be used as a natural cytotoxic, antioxidant and antimicrobial agent in food processing.

关键词： Thymus vulgaris L. Rosmarinus officinalis L. GC–MS Cytotoxicity Antioxidant Activity Antimicrobial Activity

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Relativistic solutions for diatomic molecules subject to pseudoharmonic oscillator in arbitrary dimensions

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Chinese Physics B 2013年第7期22卷 64-69页

作者： sami Ortakaya Institute of Natural and Applied Sciences Department of PhysicsErciyes University

The exact solutions of the N-dimensional Klein–Gordon equation in the presence of an exactly solvable potential of V（r）=De（r/re-re/r）2 type have been obtained. The N dimensional Klein-Gordon equation has been reduced to a first-order differential equation via Laplace transformation. The exact bound state energy eigenvalues and corresponding wave functions for CH,H2,and HCl molecules interacting with pseudoharmonic oscillator potential in the arbitrary N dimensions have been determined. Bound state eigenfunctions used in applications related to molecular spectroscopy are obtained in terms of confluent hypergeometric functions.

关键词： Klein–Gordon equation Laplace integral transform bound states

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Exact solutions of the Klein-Gordon equation with ring-shaped oscillator potential by using the Laplace integral transform

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Chinese Physics B 2012年第7期21卷 108-112页

作者： sami Ortakaya Institute of Natural and Applied Sciences Erciyes University

We present exact solutions for the Klein Gordon equation with a ring-shaped oscillator potential. The energy eigenvalues and the normalized wave functions are obtained for a particle in the presence of non-central oscillator potential. The angulm＂ functions are expressed in terms of the hypergeometric functions. The radial eigenfunetions have been obtained by using the Laplace integral transform. By means of the Laplace transform method, which is efficient and simple, the radial Klein-Gordon equation is reduced to a first-order differential equation.

关键词： ring-shaped oscillator Klein-Gordon equation Laplace integral transform bound states

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Role of quantum paths in generation of attosecond pulses

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Chinese Physics B 2020年第10期29卷 276-281页

作者： M R sami A Shahbaz Department of Physics Government College UniversityP.O.Box 54000 LahorePakistan

We investigate the role of core potential in high ionization potential systems on high harmonic generation (HHG) spectra and obtain attosecond pulses. In our scheme, we use a standard soft core potential to model high ionization potential systems and irradiated these systems with fixed laser parameters. We observe the role of these systems on all the three steps involved in HHG process including ionization, propagation and recombination. In our study, the results illustrate that for high ionization potential systems, the HHG process is more sensitive to the ionization probability compared to the recombination amplitude. We also observe that due to the stronger core potential, small oscillations of the electrons during the propagation do not contribute to the HHG spectrum, which implies the dominance of only long quantum paths in the HHG spectrum. Our results, for attosecond pulse generation, show that long quantum path electrons are responsible for the supercontinuum region near the cutoff, which is suitable for the extraction of a single attosecond pulse in this region.

关键词： high-order harmonic generation attosecond pulses quantum paths strong nuclear potential

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Methanolic extract from Lespedeza bicolor： potential candidates for natural antioxidant and anticancer agent

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Journal of Traditional Chinese Medicine 2017年第4期37卷 444-451页

作者： sami Ullah Department of Botany University of PeshawarPeshawar 24420 Pakistan

OBJECTIVE: To evaluate the anticancer, antioxidant and antimicrobial activities along with total phenolic and flavonoids contents extracted from Lespedeza bicolor indigenous to Khyber Pukhtoonkhwa ***: Anticancer activity against human lung carcinoma(LU-1) and human prostate carcinoma(Ln Cap), antimicrobial against Aspergillus fumigates, Aspergillus niger, Fusarium solani, Mucor sp Klebsiella pneumonia and Enterococcus and antioxidant activity on 1,1-Diphenyl-2-picryl-hydrazy(DPPH) and Hydrogen peroxide radicals scavenging activity were assessed in methanol extract o Lespedeza ***: Lespedeza bicolor aerial parts and root extract showed IC_(50)value of 12.5 and 50 μg/m L against LU-1 whereas, ≤ 12.5 and 12 μg/m L were calculated against Ln Cap cell line. Minimum inhibition concentration(MIC) value of 20-35 μg/m L has been observed against Aspergillus fumigates, Aspergillus niger, Fusarium solani and Mucor sp in comparision with 1-2.5 μg/m L of Terbinafine used as a standard fungicide. MIC value of 20 and 35 μg/m L of Lespedeza bicolor aerial parts and root extract against bacterial pathogen Klebsiella pneumonia and 20-50 μg/m L against Enterococcus has been measured. DPPH radical scavenging activity of Lespedeza bicolor with IC_(50)values of ≤ 50 μg/m L and ≤ 200 μg/m L was observed whereas, hydrogen peroxide scavenging activity with IC_(50)values of ≤25 μg/m L for aerial parts and ≤ 50 μg/m L for the root extract of Lespedeza bicolor has been ***: These data suggested that the methanolic extract of Lespedeza bicolor could be potential candidates for natural antioxidants and anticancer.

关键词： Lespedeza Antineoplastic agents Antioxidants Anti-infective agents

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DOF:a generic approach of domain ontology fuzzification

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Frontiers of Computer Science 2021年第3期15卷 97-108页

作者： Houda AKREMI sami ZGHAL Faculty of Sciences of Tunis University of Tunis El ManarTunis 2092Tunisia Faculte des Sciences Juridiques Universite de JendoubaJendouba 8189Tunisia

Although recent studies on the Semantic Web have focused on crisp ontologies and knowledge representation,they have paid less attention to imprecise ***,the results of these studies constitute a Semantic Web that can answer requests almost perfectly with respect to ***,they ensure low *** such,we propose in this re-search work a new generic approach of fuzzification that which allows a semantic representation of crisp and fuzzy data in a domain *** the framework of our real case study,the obtained illustrate that our approach is highly better than the crisp one in terms of completeness,comprehensiveness,generality,comprehension and shareability.

关键词： crisp ontology fuzzy ontology fuzzy logic fuzzy reasoning domain ontology

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Hydrostatic pressure and temperature effects on the binding energy and optical absorption of a multilayered quantum dot with a parabolic confinement

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Chinese Physics B 2016年第12期25卷 408-417页

作者： sami Ortakaya Muharrem Kirak Department of Physics Erciyes University 38039 Kayseri Turkiye Faculty of Education Bozok University 66200 Yozgat Turkiye

The influence of hydrostatic pressure, temperature, and impurity on the electronic and optical properties of spherical core/shell/well/shell （CSWS） nanostructure with parabolic confinement potential is investigated theoretically. The energy levels and wave functions of the structure are calculated by using shooting method within the effective-mass approximation. The numerical results show that the ground state donor binding energy as a function layer thickness very sensitively depends on the magnitude of pressure and temperature. Also, we investigate the probability distributions to understand clearly electronic properties. The obtained results show that the existence of the pressure and temperature has great influence on the electronic and optical properties.

关键词： multilayers impurity pressure nonlinear optics

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Semantic Document Layout Analysis of Handwritten Manuscripts

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Computers, Materials & Continua 2023年第5期75卷 2805-2831页

作者： Emad sami Jaha Department of Computer Science Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah21589Saudi Arabia

A document layout can be more informative than merely a document’s visual and structural ***,document layout analysis(DLA)is considered a necessary prerequisite for advanced processing and detailed document image analysis to be further used in several applications and different *** research extends the traditional approaches of DLA and introduces the concept of semantic document layout analysis(SDLA)by proposing a novel framework for semantic layout analysis and characterization of handwritten *** proposed SDLA approach enables the derivation of implicit information and semantic characteristics,which can be effectively utilized in dozens of practical applications for various purposes,in a way bridging the semantic gap and providingmore understandable high-level document image analysis and more invariant characterization via absolute and relative *** approach is validated and evaluated on a large dataset ofArabic handwrittenmanuscripts comprising complex *** experimental work shows promising results in terms of accurate and effective semantic characteristic-based clustering and retrieval of handwritten *** also indicates the expected efficacy of using the capabilities of the proposed approach in automating and facilitating many functional,reallife tasks such as effort estimation and pricing of transcription or typing of such complex manuscripts.

关键词： Semantic characteristics semantic labeling document layout analysis semantic document layout analysis handwritten manuscripts clustering retrieval image processing computer vision machine learning

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Relativistic Treatment of Spinless Particles Subject to a q-Deformed Morse Potential

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Communications in Theoretical Physics 2013年第6期59卷 689-692页

作者： sami Ortakaya Erciyes niversitesi Fen Bilimleri Enstits

The approximate analytical solutions of the Klein-Gordon equation with equal scalar and vector q-deformed Morse potential are presented for arbitrary e-states by using Laplace integral transform. The energy eigenvalues and corresponding wave functions are obtained for n and e values. In this study, in the non-relativistic limit c →∞, it has been also provided that the energy eigenfunetions for Klein-Gordon system turn into those for Schrodinger one.

关键词： Bound states approximate solutions Klein-Gordon equation integral transform

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Application of machine learning algorithms to predict tubing pressure in intermittent gas lift wells

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Petroleum Research 2022年第2期7卷 246-252页

作者： Nagham Amer sami Department of Petroleum Engineering Faculty of Earth ScienceUniversity of Miskolc3515MiskolcHungary

Tubing pressure at gas injection depth in intermittent wells is one of the most critical parameters for production engineers to evaluate the performance of the ***,monitoring of the tubing pressure is not usually carried out in real *** has been realized that the generally used correlations are not effective enough due to complexity of the intermittent process which involve many parameters and assumptions to develop such *** focus of this study is to utilize machine learning(ML)algorithms to develop a model that can accurately predict tubing pressure in artificial intermittent gas lift *** algorithms built on the field data provide a solution that is easy to use and universally applicable to the complex *** non-linear regression ML methods are employed in this study,namely,Decision Tree-regression(DT),Random Forest-regression(RF)and K Nearest Neighbors-regression(KNN).All the tubing pressures obtained from ML models were compared with the actual values to ensure the effectiveness of the *** developed models show that it can predict the pressure with more than 99.9%*** is an interesting result,as such outcome accuracy has not been reported usually in the open literature.

关键词： Machine learning Artificial intelligence Intermittent gas lift Tubing pressure Random forest Decision tree KNN

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