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Pathogenicity of bacterium, Xenorhabdus nematophila isolated from entomopathogenic nematode (Steinernema carpocapsae) and its secretion against Galleria mellonella larvae

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2005年第6期6卷 457-463页

作者： MAHAR Ali Nawaz MUNIR Muhammad elawad sami GOWEN Simon Richard HAGUE Nigel Graham Meckenzi Department of Agriculture University of Reading Reading RG6 6AT UKSchool of Plant Sciences University of Reading Reading RG6 6AS UKDepartment of Agriculture University of Reading Reading RG6 6AT UKDepartment of Agriculture University of Reading Reading RG6 6AT UKDepartment of Agriculture University of Reading Reading RG6 6AT UK

The entomopathogenic bacterium, Xenorhabdus nematophila was isolated from the hemolymph of Galleria mel- lonella infected with Steinernema carpocapsae. The bacterial cells and its metabolic secretions have been found lethal to the Galleria larvae. Toxic secretion in broth caused 95% mortality within 4 d of application whereas the bacterial cells caused 93% mortality after 6 d. When filter and sand substrates were compared, the later one was observed as appropriate. Similarly, bacterial cells and secretion in broth were more effective at 14% moisture and 25 °C temperature treatments. Maximum insect mortality (100%) was observed when bacterial concentration of 4×106 cells/ml was used. Similarly, maximum bacterial cells in broth (95%) were penetrated into the insect body within 2 h of their application. However, when stored bacterial toxic secretion was applied to the insects its efficacy declined. On the other hand, when the same toxic secretion was dried and then dissolved either in broth or water was proved to be effective. The present study showed that the bacterium, X. nematophila or its toxic secretion can be used as an important component of integrated pest management against Galleria.

关键词： Biological control Bacterial symbionts Entomopathogenic nematodes Xenorhabdus nematophila Galleria mellonella

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1.56 kV/30 A vertical β-Ga2O3 Schottky barrier diodes with composite edge terminations

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Science China(Information Sciences) 2025年

作者： Yitao FENG Hong ZHOU sami ALGHAMDI Hao FANG Xiaorong ZHANG Yanbo CHEN Guotao TIAN Saud WASLY Yue HAO Jincheng ZHANG Key Lab of Wide Band Gap Semiconductor Materials and Devices School of MicroelectronicsXidian University Center of Excellence in Intelligent Engineering Systems (CEIES) King Abdulaziz University China Resources Microelectronics Limited(Wuxi)

In recent years, large-area wide-bandgap (WBG) semiconductor materials have achieved numerous notable breakthroughs [1, 2]. The ultra-WBG semiconductor β-Ga2O3,with its excellent material properties, is ideally suited for the fabrication of power devices. Moreover, it offers easily obtainable large-area substrates, with reported sizes up to 6 inches, produced through melt-grown crystal growth methods. These characteristics make β-Ga2O3 highly attractive for future low-cost commercialization. Despite these advances, most research has focused on low-current and small-size diodes, with few studies addressing high-current and large-size diodes.

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The role of exclusive enteral nutrition in the management of orofacial granulomatosis in children

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World Journal of Pediatrics 2016年第4期12卷 421-424页

作者： Mohamed Mutalib Khaled Bezanti Mamoun elawad Fevronia Kiparissi Department of Pediatric Gastroenterology Great Ormond Street Hospital NHS Foundation Trust

Background:Orofacial granulomatosis(OFG)is a term used to describe a persistent,painless swelling of lips and orofacial *** can be associated with ulceration,gingival hypertrophy and cobble stone appearance of the buccal *** is commonly associated with Crohn’s disease and can precede the intestinal manifestation of the *** enteral nutrition(EEN)is a recognized treatment for induction of remission for Crohn’s *** aim of this study was to review the use of EEN in the management of OFG in ***:Retrospective review of medical records of all children diagnosed with OFG between 2007 and 2012 was *** of comorbidities,progression to inflammatory bowel disease(IBD)and response to EEN was ***:Twenty-nine children were included,mean age at diagnosis was 9 years(standard deviation 3.9)*** children had isolated OFG and 19 had OFG and IBD,of which 12 presented with OFG and IBD and 7 developed IBD *** time to progression to IBD was 33 months(inter quartile range:9.8-85.5).Twenty-two children completed 6 weeks of EEN,and 19 showed clinical improvement in the OFG ***:EEN appears to be an effective treatment option for children with isolated OFG or OFG and IBD.

关键词： gastroenterology inflammatory bowel disease inflammation orofacial granulomatosis

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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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Intussusception due to inflammatory fibroid polyp:A case report and comprehensive literature review

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World Journal of Gastroenterology 2012年第40期18卷 5745-5752页

作者： sami Akbulut Department of Surgery Diyarbakir Education and Research Hospital

AIM:To give an overview of the literature on intussusception due to inflammatory fibroid polyp(IFP).METHODS:We present a new case of ileal intussusception due to IFP and a literature review of studies published in English language on intussusception due to IFP,accessed via PubMed and Google Scholar *** the search,the keywords used were:intussusception,IFP,intussusception and IFP,intussusception due to IFP,and IFP presenting as *** search covered all articles from 1976 to November ***:We present a 38-year-old woman who was admitted 10 d after experiencing abdominal pain,vomiting,and *** demonstrated small bowel *** ileal intussusception due to a mass lesion 50 cm proximal to the ileocecal junction was found during *** ileal resection and anastomosis were performed.A diagnosis of ileal IFP was made based on the immunohistochemical *** addition,a total of 56 reports concerning 85 cases of intussusception due to IFP meeting the aforementioned criteria was included in the literature *** patients were aged 4 to 81 years(mean,49 ± 16.2 years);44 were women(mean,51.8 ± 14.3 years) and 41 were men(mean,46 ± 17.5 years).According to the location of the IFP,ileal intussusception was found in 63 patients,while 17 had jejunal,three had colonic,and two had ileojejunal ***:Although IFPs are rare and benign,surgery is the only solution in case of intestinal *** diagnosis should be made via immunohistochemical examination.

关键词： Intussusception Inflammatory fibroid pol-yp Vanek's tumor Immunohistochemical stain

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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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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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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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