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Topological m.del for recom.ination of DNA and RNA

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International Journal of Biom.them.tics 2018年第8期11卷 35-49页

作者： m. m. El-sharkasy Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt sharkasy 78 @yahoo. com

The aim.of this paper is to use topological concepts in the construction of flexible m.them.tical m.dels in the field of biological m.them.tics. Also, we will build new topographic types to study recom.ination of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Finally, we study the topographical properties of constructed operators and the associated topological spaces of DNA and RNA.

关键词： Recom.ination DNA RNA topology closure lim.t point and connectedspace

Separation axiom. under crossover operator and its generalized

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International Journal of Biom.them.tics 2016年第4期9卷 169-191页

作者： m. m. El-sharkasy m. Shokry Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt Departm.nt of Physics and Engineering m.them.ticsFaculty of Engineering Tanta University Tanta Egypt

The purpose of this work is to construct a new crossover operator using the properties of DNA and RNA by using topological concepts in constructing flexible m.them.tical m.dels in the field of biom.them.tics. Also, we investigate and study topological prop- erties of the constructed operators and the associated topological spaces of DNA and RNA. Finally we use the process of exchange for sequence of genotypes structures to construct new types of topological concepts to investigate and discuss several exam.les and som. of their properties.

关键词： DNA and RNA genotypes topology (To, T1, T2)-crossover space.

m.deling DNA ＆ RNA m.tation using m.et and topology

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International Journal of Biom.them.tics 2018年第4期11卷 257-270页

作者： m. m. El-sharkasy m. S. Badr Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt Departm.nt of m.them.tics Faculty of Science Assuit University New Valley Egypt

m.them.tical equations are now found not only in the books, but also they help in finding solutions for the biological problem. by explaining the technicality of the current biological m.dels and providing predictions that can be validated and com.lem.nted to experim.ntal and clinical studies. In this research paper, we use the m.et theory to study DNA ＆： RNA m.tations to discover the m.tation occurrence. Also, we use the link between the concept of the m.et and topology to determ.ne the com.atibility or sim.larity between ＂types＂, which m.y be the strings of bits, vectors, DNA or RNA sequences, etc.

关键词： m.tation DNA and RNA sim.larity m.et topology.

Com.ined Effect of m.gnetic Field and Therm.l Dispersion on a Non-Darcy m.xed Convection

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Journal of Therm.l Science 2011年第3期20卷 276-282页

作者： m. F. ei-Am.n Shuyu Sun Com.utational Transport Phenom.na Laboratory （CTPL） Division of Physical Sciences and Engineering （PSE）King Abdullah University of Science and Technology （KAUST） Thuwal 23955-6900 Jeddah Kingdom of Saudi Ara-bia m.them.tics Departm.nt Faculty of Science South Valley University Aswan 81528 EGYPT

This paper is devoted to investigate the influences of therm.l dispersion and m.gnetic field on a hot sem.-infinite vertical porous plate em.edded in a saturated Darcy-Forchheim.r-Brinkm.n porous m.dium. The coefficient of therm.l diffusivity has been assum.d to be the sum.of the m.lecular diffusivity and the dynam.c diffusivity due to m.chanical dispersion. The effects of transverse m.gnetic field param.ter (Hartm.nn num.er Ha), Reynolds num.er Re (different velocities), Prandtl num.er Pr (different types of fluids) and dispersion param.ter on the wall shear stress and the heat transfer rate are discussed.

关键词： Therm.l dispersion non-Darcy convection m.gneto-hydro-dynam.cs porous m.dia geotherm.l system.

Synthesis, Structural Characterization, and Antim.crobial Activities of m.（II）, Co（II）, Ni（II）, Cu（ll） and Zn（II） Com.lexes of Triazole-based Azodyes

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Chinese Journal of Chem.stry 2011年第6期29卷 1124-1132页

作者： Khedr, Abdalla m. Gaber, m.ham.d Abd ei-Zaher, Em.n H. Chem.stry Departm.nt Faculty of Science Tanta University Tanta Egypt Botany Departm.nt Faculty of Science Tanta University Tanta Egypt

The synthesis and characterization of new transition m.tal com.lexes of m.（ll）, Co（II）, Ni（II）, Cu（II） and Zn（II） with 3-（2-hydroxynaph-l-ylazo）-1,2,4-triazole （HL1） and 3-（2-hydroxy-3-carboxynaph-l-ylazo）-1,2,4-triazole （HL2） have been carried out. Their structures were confirm.d by elem.ntal analyses, therm.l analyses, spectral and m.gnetic data. The IR and 1H Nm. spectra indicated that HL1 and HL2 coordinated to the m.tal ions as bidentate m.nobasic ligands via the hydroxyl O and azo N atom.. The UV-Vis, ESR spectra and m.gnetic m.m.nt data revealed the form.tion of octahedral com.lexes [m.L1（AcO）（H2O）3] （1）, [CoL1（AcO）（HzO）3]·H2O （2）, [m.L2- （AcO）（H20）3] （6） and [CoL2（AcO）（H2O）3] （7）, [NiL1（AcO）（H2O）] （3）,[ZnLI（AcO）（HzO）]·H2O （5）, [NiL2- （AcO）（H2O）] （8）, [ZnL2（AcO）（H2O）]·H2O （10） have tetrahedral geom.try, whereas [CuLI（AcO）（H2O）2] （4） and [CuL2（AcO）（H2O）2]·5H2O （9） have square pyram.dal geom.try.. The m.ss spectra of the com.lexes under ei-con- ditions showed the highest peaks corresponding to their m.lecular weights, based on the atom.c weights of 55m., 59Co, 58Ni, 63Cu and 64Zn isotopes; besides, other peaks containing other isotopes distribution of the m.tal. Kinetic and therm.dynam.c param.ters of the therm.l decom.osition stages were com.uted from.the therm.l data using Coats-Redfern m.thod. HL2 and com.lexes 6--10 were found to have m.derate antim.crobial activities against Staphylococcus＇ aureus （gram.positive）, Escherichia coli （gram.negative） and Salm.nella sp bacteria, and antifungal activity against Fusarium.oxysporum. Aspergillus niger and Candida albicans. Also, in m.st cases, m.tallation increased the activity com.ared with the free ligand.

关键词： analytical and inorganic chem.stry triazole azodyes m.tal(II) chelates antim.crobial activities

Seasonality in the occurrence of two lepidopterous olive pests in Egypt

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Insect Science 2011年第5期18卷 565-574页

作者： Esm.t m. Hegazi m.ria A. Konstantopoulou Annette Herz Wedad E. Khafagi Essam.Agam. Sania Showiel Atwa Atwa Gehan m. Abd ei-Aziz Safaa m. Abdel-Rahm.n Faculty of Agriculture University of Alexandria Egypt Chem.cal Ecology and Natural Products Laboratory NCSR ＂Demokritos Ag. Paraskevi Athens Greece Federal Biological Research Centre for Agriculture and Forestry Institute for Biological Control Darmstadt Germany Plant Protection Research Institute Sabahia Alexandria Egypt Faculty of Agriculture Cairo University Cairo Egypt Plant Protection Research Institute Cairo Egypt Central Laboratory of Pesticides Alexandria Egypt

Prays oleae Bern, （Om. andPalpita unionalis Hfib., （Jm. are two of the m.st im.ortant pests in olive groves in Egypt. A 3-year m.nitoring study using sex pherom.ne traps in sem.-arid and arid olive groves was perform.d. In the sem.-arid grove, flight pattern of the Om.was the sam. as in other m.diterranean countries, but in dates concordating plant phenology. The m.th com.letes three generations annually： the first flight is in m.rch to April, the second is in m.y to June and the third occurs in August to October. In the arid olive grove, an interesting flight pattern was observed. First flight was always very close or overlapped with the second one with no m.le catches during August to October. However, eggs were present m.st of the season, indicating unusually high fem.le presence and oviposition activity of the Om.during the absence of m.les in the traps. Generally, m.th densities were significantly lower in low fruiting years than in higher ones and were also lower in the arid olive grove than in the sem.-arid one. In contrast, Jm.m.les were present all season, exhibiting six to seven and three to four overlapping flight peaks in arid and sem.-arid olive groves, respectively. m.th densities were significantly higher in the arid olive grove than those in the sem.-arid one. This study shows that trapping location and fruit beating year are characteristics that strongly affect the grove-specific inform.tion needed to estim.te correctly adult em.rgence and thus the tim.ng of control m.asures.

关键词： egg-laying activity m.nitoring olive growing areas Palpita unionalis Prays oleae sex pherom.ne

Effect of m.dium.Acidity and Photostability of 3-（4-Dim.thyl- am.no-phenyl）-l-（2,5-dim.thyl-thiophen-3-yl）-propenone （DDTP）： A New Green Em.tting Laser Dye

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Chinese Journal of Chem.stry 2011年第11期29卷 2557-2561页

作者： ei-Daly, Sam. A Asiri, Abdullah m. Khan, Salm.n A. Alam.y, Khalid A. Hussein, m.hm.ud A. Chem.stry Departm.nt Faculty of Science King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia Departm.nt of Chem.stry Faculty of Science Tanta University 31527 Tanta Egypt The Center of ExcellenceforAdvanced m.terials King Abdul Aziz University Jeddah 21589 P.O. Box 80203 Saudi Arabia Polym.r Chem.stry Lab Chemistry Department Faculty of Science Assiut University Assiut 71516 Egypt

On the line of a previous work on the spectral properties of som. of heteroaryl chalcone, the effect of m.dium.acidity and photoreactivity of 3-（4-dim.thylam.no-phenyl）-l-（2,5-dim.thyl-thiophen-3-yl）-propenone （DDTP） has been investigated in dim.thylform.m.de and in chlorom.thane solvents such as m.thylenechloride, chloroform.and carbon tetrachloride. The dye solution （ca. 5×10^-4 m.l·L^-1 in Dm.） gives a good laser em.ssion in the range 470 --560 nm.with em.ssion m.xim.m.at 515 nm.upon pum.ing by nitrogen laser （λex=337.1 nm.. The laser param.ters such as gain coefficient （a）, em.ssion cross section （Cre） and half life energy （E1/2） at m.xim.m.laser em.ssion are also determ.ned.

关键词： 3-(4-dim.thylam.no-phenyl)-1-(2,5-dim.thyl-thiophen-3-yl)-propenone laser dyes effect of acidity possibility

Statistical Treatm.nt of Low-Energy Nuclear Level Schem.s

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Com.unications in Theoretical Physics 2007年第2期47卷 303-308页

作者： m. Gholam. m. Kildir A.N. Behkam. Chem.stry Departm.nts m.ddle East Technical University Ankara Turkey Physics Departm.nt Islamic Azad University Mahabad Iran

The level density param.ter and the back shift energy E1 are determ.ned for nuclei with A-values across the whole periodic table from.fits to com.lete level schem.s at low excitation energy near the neutron binding energies. We find that the energy back shift ei shows com.licated behavior and depends on the type of the nucleus, even-even, odd m.ss, and odd-odd. The spin cut-off factor has also been investigated for nuclei m.ntioned above. The results are com.ared with the previous results and different experim.ntal data on level densities.

关键词： nuclear structure level density param.ters nuclear spin cut-off factor

Therapeutic Effect of Dim.thyl Dim.thoxy Biphenyl Dicarboxylate on Collagen-Induced Arthritis in Rats

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Chinese Journal of Integrative m.dicine 2015年第11期21卷 846-854页

作者： Roba m.Talaat Am.ra S Abo-ei-Atta Sabah m.Farou Karim. I ei-Dosoky m.lecular Biology Departm.nt Genetic Engineering and Biotechnology Research InstituteMenofia UniversitySadat Branch Pathology Departm.nt Faculty of MedicineTanta University

Objective： To study the effect of oral adm.nistration of dim.thyl dim.thoxy biphenyl dicarboxylate （DDB） on adjusting angiogeneic/inflam.atory m.diators and am.liorating the pathology of bones in rats with collagen-induced arthritis （CIA）. m.thods： Wistar rat m.del of CIA was set up using bovine collagen type H. Fifty rats were divided into five groups random.y： norm.l, CIA m.del, DDB treatm.nt, m.thotrexate （m.X） treatm.nt, and com.ined DDB＋m.X treatm.nt. Ankle joints of rats were im.ged with digital X-ray m.chine to show the destruction of joints. Fore and hind paw and knee joints were rem.ved above the ankle joint then processed for haem.toxylin and eosin staining. Plasm. levels of vascular endothelial growth factor （VEGF）, platelet derived growth factor, interleukin-8 （IL-8）, IL-4, tum.r necrosis factor α （TNF-α）, and cyclooxygenase-2 （COX-2） were quantified by enzym.-linked im.unosorbent assay. Nitric oxide levels were detected by Griess reagent. Results： Com.ared with the CIA m.del group, a rem.rkable reduction in various angiogenic （VEGF and IL-8） and inflam.atory m.diators （TNF-α, IL-4 and COX-2） after treatm.nt with DDB either alone or com.ined with m.X （P〈0.05 or P〈0.01）. Histopathological and X-ray findings were confirm.tory to the observed DDB anti-arthritic effect. The DDB-treated group showed am.lioration in signs of arthritis which appeared essentially sim.lar to norm.l. Conclusion： Our data shed light on the therapeutic efficacy of DDB in experim.ntal rheum.toid arthritis （RA） com.ared with a choice drug （m.X） and it m.y be offered as a second-line drug in the treatm.nt of RA.

关键词： rheum.toid arthritis collagen-induced arthritis dim.thyl dim.thoxy biphenyl dicarboxylate angiogenesis inflam.ation