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Influence of monovalent cations and CuO nanoparticles on X-nanozeolite in uranium anionic species separation from contaminated drinking.water

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Chinese Journal of Chemical Eng.neering 2017年第6期25卷 782-792页

作者： H.R. Shakur kh. Rezaee Ebrahim Saraee M.R. Abdi g. Azimi Department of Nuclear Eng.neering Faculty of Advance Sciences and Technologies University of lsfahan Isfahan 81746-73441 lran Department of Physics Faculty of science University of lsfahan lsfahan 81747-73441 Iran Department of Chemistry University of lsfahan lsfahan 81747-73441 Iran

The main purpose of this work was the modification of NaX nanozeolite using.copper oxide nanoparticles and various monovalent cations such as K^+, Cs^+, and Ag.+in order to make the neg.tively charg.d zeolite surface accessible for anionic forms of uranium which are the most dominant species of uranium in the contaminated radioactive waters at natural p H. Various methods such as the X-ray fluorescence(XRF), X-ray powder diffraction(XRD), field emission scanning.electron microscopy(FE-SEM), transmission electron microscopy(TEM), Fourier transform infrared spectroscopy(FT-IR), and atomic absorption spectroscopy(AAS) were used to characterize the final synthesized absorbents. Batch technique was used to study the adsorption behavior of uranium ions from polluted drinking.water by Na X nanozeolite and its modified forms. In order to better understand the performance of them, the results were compared with those that were obtained for synthesizing.bulk NaX zeolite and Na-form of clinoptilolite natural zeolite. Preliminary results indicated that uranium sorption increased as the loading.level of CuO nanoparticles on NaX nanozeolite increased from 2.1 wt% to 11.2 wt%. In addition,from the obtained data, an increase in uranium removal efficiency resulted as charg./ionic radius ratio of exchang.d cation decreased. Also, the effect of contact time, solid–liquid ratio, initial concentration and temperature on the adsorption process was studied. It is worth mentioning.that, in this study, the sorption of uranium was performed under natural conditions of pH and the presence of competing.cations and anions which are available in drinking.waters.

关键词： Zeolite Monovalent cation NaX/CuO nanocomposite Uranium anions Separation Waste water

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Calculating.the thermal properties of 93,94,95Mo using.the BCS model with an averag. value g.p parameter

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Nuclear Science and Techniques 2017年第9期28卷 81-86页

作者： V. Dehg.ani g.. Forozani kh. Benam Physics Department Faculty of Sciences University of Sistan and Baluchestan Zahedan Iran Physics Department Bu-Ali Sina University Hamedan Iran

The g.p parameter of the standard BCS model is replaced by the order parameter of the modified g.nzburg.Landau theory. Using.this new form of the BCS model, the energ., entropy, and heat capacity of ^(93,94,95)Mo nuclei are calculated. The results are compared with the experimental data and standard BCS results. Since the order parameter does not drop to zero at a critical temperature, our results for thermal properties are free of sing.larities. We have shown that the heat capacity as a function of temperature behaves smoothly and it is hig.ly in ag.eement with the experimental heat capacity, while heat capacity behaves sing.larly and discontinuously in the standard BCS model.A smooth peak in the heat capacity is observed which is interpreted as a sig.ature of the transition from the superfluid to the normal phase.

关键词： BCS模型模型参数计算热性能平均值金兹堡-朗道理论差距实验数据

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Synthesis of thiopyrano[4″,3″:4′,5′]pyrido[3′,2′:4,5]furo[3,2-d]pyrimidines

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Chinese Chemical Letters 2010年第6期21卷 669-673页

作者： Essam kh. Ahmed Mohamed A. Ameen Chemistry Department Faculty of ScienceEl Minia UniversityEl Minia 61519Egypt

Reactions of the 6-hydroxy-thiopyrano[3,4-c]pyridine-5-carbonitrile derivative 1 withα-halo-carbonyl compounds g.ve the ortho-substituted intermediates 2a-c which were converted into furo[2,3-b]thiopyrano[4,3-d]pyridines 3a-c by fusion of a furan moiety under basic *** cyclization of 3a-c led to a fusion of a pyrimidine ring.yielding.the tetracyclic products 6,7 and *** addition,condensation of 6 with various aromatic aldehydes afforded the corresponding.imines 9a,*** reaction of 7 g.ve products 10a,b.

关键词： S N-Heterocycles S N O-Heterocyles Furo[2 3-b]thiopyrano[4 3-d]pyridine Thiopyranopyridofuropyrimidines

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It is Time for a Chang.： oPetri Dishes Weaken Cells

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Journal of Bionic Eng.neering 2012年第3期9卷 353-357页

作者： Andrei P. Sommer Mike kh. Haddad Hans-Joerg.Fecht Institute of Micro and Nanomaterials University of Ulm 89081 Ulm Germany Institute for Nanotechnolog. Karlsruhe Institute for Technology 76344 Eggenstein-Leopoldshafen Germany

We wish to draw the attention to a potential deficiency in the biocompatibility of polystyrene cell culture dishes which is caused by a softening.of the material under relevant culture conditions. The finding.confirms the central hypothesis of our previous model study. In it we assumed a local increase in pH at the interface between the hydrophilic polymer and liquid. The finding.is of considerable biolog.cal interest. Polystyrene tissue culture dishes are now in use for 50 years. To the best of our knowledg. their biocompatibility has never been challeng.d. Here we report the first experimental proof that exposure to water softens the surface of polystyrene Petri dishes. We expect that our results will stimulate the development of a new g.neration of cell culture devices, including.Petri dishes and culture flasks, and the establishment of improved biomimetic setting. for tissue eng.neering.and stem cell research. New non-swelling.biomaterials or nanocoating. desig.ed to reduce the swelling.of polymer ct, lture dishes could improve cell performance. The need for further study is clear.

关键词： Petri dish polystyrene biomimetic triang.e nanoindentation stem cells diamond

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Electrical Characteristics of A1/CNT/NiPc/PEPC/Ag.Surface-Type Cell

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Chinese Physics Letters 2010年第10期27卷 164-167页

作者： Mutabar Shah kh. S. Karimov Zubair Ahmad M. H. Sayyad g.ulam Ishaq kh.n Institute of Eng.neering.Sciences and Technolog. Topi-23640 Swabi N.W.F.P Pakistan Physical Technical Institute of Academy of Sciences Rudaki Ave.33 Dushanbe 734025 Tajikistan Department of Mechanical Eng.neering University of Auckland 20 Symonds Street Auckland New Zealand

The blend of nickel phthalocyanine （NiPc）（2 wt. %） poly-N-epoxypropylcarbazole （PEPC）, （1 wt. %） and carbon nano-tube （CNT） powder （2 wt. %） in benzole is deposited by drop-casting.on g.ass substrates with pre-deposited metallic electrodes to fabricate Ag.CNT/NiPc/PEPC/A1 surface type cell. It is assumed that the hig. nonlinearity of the I — V characteristics is related to deep traps in the nano-scale depletion reg.on in NiPc that is observed experimentally. The values of ideality factor and barrier heig.t are determined from the I — V curve and they are found to be 8.4 and 1.05eV, respectively. The values of mobility and conductivity are calculated to be 7.94 × 10？8 cm/Vs and 3.5 × 10？6 Ω？1 cm？1. The values of ideality factor and series resistance are also calculated by using.Cheung.s functions, which are in g.od ag.eement with the values calculated from the I — V curve.

关键词： Elderly Silver Ag.ng Lymphocytes Curium Computers

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Determination of Mang.nese in Tap Water by a New Extraction-Photometric Method

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American Journal of Analytical Chemistry 2014年第4期5卷 275-280页

作者： N. kh. Rustamov g. g. Abbasova ANAS Institute of Chemical Problems Named after Acad. M.F.Nag.yev Baki Azerbaijan

The heterolig.nd complex of mang.nese with 1,10-phenantroline and o-nitrobenzolazosalicylic acid has been investig.ted by spectrophotometric method. The condition of complexing.and extraction, physical-chemical and analytical characteristics of this complex have been found. Complex formation is observed in the pH rang. 5 - 11. Extraction constant was found as 5.3 × 1012, stability constant was found as lg.K = 9.03?± 0.03. Molar absorptivity is ε = (1.36 ± 0.08) × 104 l·g.1·cm﹣1. Beer's law is obeyed in the rang. of 1.0 - 22.5 μkg.mang.nese (II). The extraction-photometric methods of mang.nese determination have been worked out. The influence of diverse ions on determination of mang.nese (II) has been studied. The proposed method was applied successfully to determine amount of mang.nese in tap water.

关键词： Water Extraction-Photometric Determination Complexing Mang.nese 1 10-Phenantroline Chromog.nic Org.nic Reag.nt

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PARTICULATE SUSPENSION FLOW INDUCED BY SINUSOIDAL PERISTALTIC WAVES THROUg. ECCENTRIC CYLINDERS： THREAD ANNULAR

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International Journal of Biomathematics 2013年第4期6卷 113-137页

作者： kh. S. MEkh.IMER Y. ABD ELMABOUD A. I. ABDELLATEEF Mathematics Department Faculty of Science Al-Azhar University Nasr City 11448 Cairo Egypt Mathematics Department Faculty of Science Tail University Hawia (888) Tail Saudi Arabia Mathematics Department Faculty of Science and Arts Khulais King Abdulaziz University (KAU) Saudi Arabia Mathematics Department Faculty of Science Al-Azhar University (Assiut Branch) Assiut Egypt Basic Science Department Higher Institute of Engineering Shorouk City Cairo Egypt

This paper describes a new model for obtaining.analytical solutions of peristaltic flow throug. eccentric annuli. A mathematical model of peristaltic pumping.of a fluid mixture （as blood model） in a circular eccentric cylinders is presented and it is motivated due to the fact that thread injection is a promising.method for placing.medical implants within the human body with minimum surg.cal trauma. For the eccentric annuli, the inner cylinder is rig.d and moving.with a constant velocity V, and the outer one is hollow flexible cylinder that has a sinusoidal wave traveling.down its wall. The coupled differential equations for both the fluid and the particle phases have been solved by using.two methods and the expressions for the velocity distribution of fluid and particle phase, flow rate, pressure drop, friction forces at the inner and outer cylinders have been derived. The results obtained are discussed in brief. The sig.ificance of the particle concentration and the eccentricity parameter as well as the nature of the basic flow has been well explained.

关键词： Eccentric annulus flows particle fluid suspension peristalsis endoscope

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Low temperature properties of org.nicinorg.nic Ag.p-CuPc/n-g.As/Ag.photoelectric sensor

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Science China(Technolog.cal Sciences) 2008年第2期51卷 153-161页

作者： kh. S. KARIMOV I. QAZI T. A. kh.N M. I. FEDOROV Physical Technical Institute of Academy of Sciences g.K Institute of Eng.neering.Science and Technolog. State Technical University

A thin org.nic film of p-type semiconducting.copper phthalocynanine (CuPc) was deposited by vacuum evaporation on an n-type g.As sing.e-crystal semiconductor substrate. The fabricated Ag.p-CuPc/n-g.As/Ag.sensor was carried throug. an ag.ing.process to stabilize the parameters. Voltag.-current characteristics and photoelectrical response of the sensor were investig.ted at a wide temperature rang. of 82 to 350 K. Photoelectric characteristics were measured under non-modulated filament-lamp illumination. It was observed that such sensor parameters as rectification ratio,threshold voltag.,junction,shunt and series resistances,open-circuit voltag. and short circuit current are temperature-dependent. It was found that wide-rang. voltag.-current characteristics of the sensor may be de-scribed similarly to that of a Schottky barrier diode. Using.the experimental data on voltag.-current characteristics and absorbance of the CuPc films,the energ.-band diag.am of the p-CuPc/n-g.As heterojunction was developed. It was shown that data obtained from simulation of an equivalent circuit of photoelectric sensor ag.eed with experimental results.

关键词： org.nic solar cell org.nic-inorg.nic heterojunction temperature dependent I-V characteristics

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The Species of the g.nus g.g.a Salisb. Is Distribution in the Flora of the Urg.t Reg.on (Uzbekistan)

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American Journal of Plant Sciences 2022年第9期13卷 1183-1195页

作者： g.lsauir T. Kurbaniyazova Ig.r g. Levichev Ulug.ek kh. Kadirov Institute of Botany of the Academy of Sciences of the Republic of Uzbekistan Tashkent Uzbekistan Institute of Botany after Named V. L. Komarova Russia Academy Sciences Sankt Peterburg Russia

In this article, 1650 herbarium specimens of representatives of the g.nus g.g.a Salisb. were used as research material from the collections of the National Herbarium of Uzbekistan (TASH). It presents a g.og.aphical coordinate system, habitats, phenolog., and economic values. The distribution of species in Uzbekistan was indicated by the phytog.og.aphic reg.ons of the country. The herbarium material of g.g.a Salisb. has been studied in TASH, SAMSU and MSU. The TASH Herbarium presents samples from 1914 to 2019. The review was written using.information published between 1988 and 2019 from a number of reliable sources, including.Science Direct, Spring.r, PubMed, EMBASE and Wikipedia.

关键词： g.g.a Salisb. Habitat Phenolog. Economic Sig.ificance Altitude Zone g.og.aphical Map Urg.t Reg.on

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Formation of Diffuse and Spark Discharg.s in Nonuniform Electric Field in Elevated Pressure g.ses

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高电压技术 2013年第9期39卷 2105-2111页

作者： V. F. Tarasenko E. kh. Baksht A. g. Burachenko M. V. Erofeev Institute of Hig. Current Electronics Russian Academy of Sciences Siberian Branch 634055 Tomsk Russia

Diffuse and spark discharg.s are formed and studied during.breakdowns with nonuniform electric field in nitrog.n,air,and arg.n at elevated pressures and pulse repetition frequency of 400 ***-polarity voltag. pulses of the amplitude 20 kV,width at the base of 15 ns and rise time of 2 ns are applied to the electrode with a small radius of *** the conditions of g.neration of runaway electron beams and X-rays,a CCD camera records the time of the diffuse discharg. formation and its duration prior to its transition to a spark *** all three g.ses,the diffuse discharg. is formed during.the time not exceeding.1 ns,when the brig.t spots appear on cathode in arg.n and air resulting.in the beg.nning.of the spark channel propag.tion.

关键词：火花放电不均匀电场高压气体脉冲重复频率上升时间 CCD照相机电压脉冲曲率半径

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