检索结果-南通市图书馆

Chinese Journal of Chemical Engineering 2020年第6期28卷 1582-1590页

作者： ismail m.Ahmed mostafa m.Hamed Sayed S.metwally Chemistry Department College of ScienceJouf UniversitySkakaSaudi Arabia Hot Laboratories and Waste management Center Atomic Energy Authority13759 CairoEgypt

modification of perlite using nano-magnetic iron oxide was implemented to produce nano-magneticFe3O4-coated perlite composite(Fe3O4/Perlite).The prepared composite was characterized using Scanning Electron microscopy,Fourier-Transform Infrared spectroscopy and Powder X-ray *** potentiality of both perlite and Fe3O4/Perlite composite to eliminate Cr(VI)from the environmentally relevant water was *** influence of main factors which could affect the adsorption was studied including;pH of medium,shaking time and Cr(VI)ions *** experimental outcome demonstrated that the modification of perlite by nano-magnetic Fe3O4 showed a significantly enhanced Cr(VI)removal efficiency relative to that of unmodified *** the kinetic studies,the experimental data fitted well with the pseudo-second-order ***,it proposes that Langmuir isotherm is more adequate than the Freundlich isotherm for both perlite and modified *** results recommended that Fe3O4/Perlite composite had a great potential as an economic and efficient adsorbent of Cr(VI)from contaminated water,which has huge application potential.

关键词： Nano-magnetic Composite Kinetics Isotherm Perlite Adsorption

Infrared, Diffuse Reflectance and Dielectric Studies ofAntimony Trisulphide

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 1998年第4期14卷 344-348页

作者： Hanafi, Z.m. ismail, F.m. Khalil, m.Sh. Inorganic Chemistry Dept. National Research Centre Dokki Cairo Egypt

Infrared absorption spectra of orange, black and transferred Sb//2S//3 samples have been studied in the spectral range 200-4000 cm** minus **1. The pronounced difference between the different samples is the appearance of excess sulphur present in the orange and transferred samples except those of transferred at 543 K and the black Sb//2S//3. The change of sharpness of some IR peaks reveals the amorphous/crystalline change. The effect of the degree of crystallinity and stoichiometry on the energy gap values was investigated by using optical method. The obtained dielectric parameters epsilon prime and epsilon double prime of the different samples are thoroughly affected by the degree of crystallinity and smoothly affected by either the frequency or the temperature or both, except at lower frequencies. (Edited author abstract) 26 Refs.

关键词： Antimony compounds

Diffusion monte Carlo calculations on LaB molecule

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第9期27卷 241-246页

作者： Nagat Elkahwagy Atif ismail S m A maizet K R mahmoud Department of Physics Faculty of Science Kafrelsheikh University Kafr El-Sheikh Egypt Department of Physics Faculty of Applied Sciences Umm AI Qura University Makkah Saudi Arabia Department of Physics Faculty of Science Menoufia University Shebin EI-Kom Egypt

Potential energy curves for the lowest electronic states of LaB and LaB- have been calculated by ab initio *** diffusion monte Carlo method has been employed in combination with three different trial functions. Spectroscopic constants have also been numerically derived for the neutral molecule and compared with the only available theoretical work;^（[19]） however, predictions are provided for the corresponding constants for the anionic species which have not been reported yet. Our calculations suggest the high spin quintet state of LaB as the ground state with the triplet state higher in energy irrespective of the type of the functional used. This suggestion is in good accordance with the previous theoretical results calculated at B3LYP/LANL2DZ level of theory, whereas it contradicts with the prediction based upon B3LYP/SDD calculations in the same study. moreover, variations of the permanent dipole moments as a function of the internuclear separations for the two electronic states of the neutral molecule have been studied and analyzed.

关键词： potential energy curve lanthanum boride diffusion monte Carlo dipole moment

K~+,Ca2+和mg2+对不同水稻(Oryza sativa L.)基因型苗期耐盐性的影响

在线全文

学校读者我要写书评

暂无评论

中国农业科学 2010年第15期43卷 3088-3097页

作者：张振华刘强宋海星荣湘民 Abdelbagi m.ismail 湖南农业大学资源与环境学院国际水稻研究所作物与环境科学系

【目的】进一步探明盐胁迫条件下营养元素K+、Ca2+和mg2+对苗期不同水稻基因型耐盐性的影响差异,为明确作物耐盐胁迫的生理机制、提高作物耐盐胁迫能力提供参考。【方法】于2009年1—4月在严格控制水、温、光和营养元素供应的国际水稻... 详细信息

【目的】进一步探明盐胁迫条件下营养元素K+、Ca2+和mg2+对苗期不同水稻基因型耐盐性的影响差异,为明确作物耐盐胁迫的生理机制、提高作物耐盐胁迫能力提供参考。【方法】于2009年1—4月在严格控制水、温、光和营养元素供应的国际水稻研究所人工气候室进行水培试验,比较研究营养液中K+、Ca2+和mg2+浓度的变化对不同水稻基因型苗期耐盐性的影响。【结果】在盐胁迫条件下(100mmol·L-1NaCl),耐盐基因型(FL478和IR651)与盐敏感基因型(IR29和Azucena)相比,植株体内有较低的Na+含量和Na+/K+、Na+/Ca2+、Na+/mg2+比,有较高的K+含量,这些都是耐盐基因型耐盐胁迫能力高于盐敏感基因型的内在原因。盐胁迫条件下提高营养液中Ca2+和mg2+的含量(60mg·L-1),可显著降低植株体Na+含量和Na+/K+、Na+/Ca2+、Na+/mg2+比,明显减轻盐胁迫的危害,增强水稻耐盐胁迫能力,且Ca2+处理的效果优于mg2+处理;而提高营养液K+含量对以上指标的影响远远小于Ca2+处理和mg2+处理,这也是K+处理对水稻耐盐性影响相对不明显的内在原因。【结论】K+、Ca2+和mg2+在植株体内的含量及其与Na+的比值变化都会影响水稻苗期耐盐性;适当提高水稻生长环境的Ca2+和mg2+浓度可以明显增强植株耐盐胁迫能力,营养元素Ca2+的效果比mg2+明显;而K+对水稻耐盐性的影响相对不明显。

关键词：水稻盐胁迫苗期营养元素(K+,Ca2+,mg2+) 不同基因型

Strain effect on graphene nanoribbon carrier statistic in the presence of non-parabolic band structure

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第9期25卷 480-483页

作者： N A Izuani Che Rosid m T Ahmadi Razali ismail Department of Electronics and Computer Engineering Faculty of Electrical EngineeringUniversiti Teknologi Malaysia Nanoelectronic Group Physics DepartmentFaculty of ScienceUrmia University

The effect of tensile uniaxial strain on the non-parabolic electronic band structure of armchair graphene nanoribbon（AGNR） is *** addition,the density of states and the carrier statistic based on the tight-binding Hamiltonian are modeled *** is found that the property of AGNR in the non-parabolic band region is varied by the *** tunable energy band gap in AGNR upon strain at the minimum energy is described for each of n-AGNR families in the non-parabolic *** behavior of AGNR in the presence of strain is attributed to the breakable AGNR electronic band structure,which varies the physical properties from its *** linear relation between the energy gap and the electrical properties is featured to further explain the characteristic of the deformed AGNR upon strain.

关键词： strain graphene nanoribbon uniaxial strain current–voltage characteristic

Fabrication of Noble metal-semiconductor hybrid nanostructures using phase transfer

在线全文

学校读者我要写书评

暂无评论

Nano Research 2013年第2期6卷 121-130页

作者： Tanushree Bala Ajay Singh Ambarish Sanyal Catriona O'Sullivan fathima Laffir Claudia Coughlan Kevin m. Ryan materials and Surface Science Institute and Department of Chemical and Environmental Sciences University of Limerick Limerick Ireland SFI-Strategic Research Cluster in Solar Energy Research University of Limerick Ireland

An easy and effective solution based procedure for the synthesis of noble metal （both Au and Ag） tipped semiconductor nanomaterials is demonstrated where the metal precursors are taken in water and the semiconductors in organic medium, exploiting the phase transfer and reducing capability of suitably chosen ligands. The phase tranfer route is a generalised approach to form either Ag or Au tips on cadmium chalcogenide nanoparticles and nanorods. While multiple dots of noble metals are formed on the semiconductor nanomaterials initiall~ these coalesce into larger islands with time. The hybrids are characterized by transmission electron microscopy （TEm）, X-ray diffraction （XRD）, photoluminescence （PL）, ultraviolet-visible spectroscopy （UV-vis） and X-ray photoelectron spectroscopy （XPS）. A detailed FTIR analysis was also carried out to delineate the role of the ligands in the synthesis.

关键词： semiconductor-metalhybrids Ag tips Au tips phase transfer

Spectral features and antibacterial properties of Cu-doped ZnO nanoparticles prepared by sol-gel method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第7期25卷 459-465页

作者： Alireza Samavati A F ismail Hadi Nur Z Othaman m K mustafa Centre for Sustainable Nanomaterials Ibnu Sina Institute for Scientific and Industrial ResearchUniversiti Teknologi Malaysia Advanced membrane Technology Research Centre (AmTEC) Universiti Teknologi Malaysia Faculty of Science Technology and Human Development Universiti Tun Hussein Onn Malaysia

Zn（1-x）Cux O（x=0.00, 0.01, 0.03, and 0.05） nanoparticles are synthesized via the sol-gel technique using gelatin and nitrate precursors. The impact of copper concentration on the structural, optical, and antibacterial properties of these nanoparticles is demonstrated. Powder x-ray diffraction investigations have illustrated the organized Cu doping into ZnO nanoparticles up to Cu concentration of 5%（x = 0.05）. However, the peak corresponding to CuO for x= 0.01 is not distinguishable. The images of field emission scanning electron microscopy demonstrate the existence of a nearly spherical shape with a size in the range of 30–52 nm. Doping Cu creates the Cu–O–Zn on the surface and results in a decrease in the crystallite size. Photoluminescence and absorption spectra display that doping Cu causes an increment in the energy band gap. The antibacterial activities of the nanoparticles are examined against Escherichia coli（Gram negative bacteria）cultures using optical density at 600 nm and a comparison of the size of inhibition zone diameter. It is found that both pure and doped ZnO nanoparticles indicate appropriate antibacterial activity which rises with Cu doping.

关键词： Cu-doped ZnO nanoparticles photoluminescence antibacterial E.coli

Eurycoma longifolia Jack in managing idiopathic male infertility

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2010年第3期12卷 376-380,I0010页

作者： mohd ismail Bin mohd Tambi m. Kamarul Imran Wellmen Clinic Damai Service Hospital Kuala Lumpur 52100 Malaysia Department of Community medicine School of Medical Sciences University Sains Malaysia Kbg Kerian Kelantan 16150 Malaysia

This study investigated the effect of treatment with the proprietary standardized, water-soluble extract of the root of the malaysian plant, Eurycoma longifolia Jack, which is thought to enhance male fertility with regard to higher semen volumes, sperm concentrations, the percentage of normal sperm morphology and sperm motility in male partners of sub-fertile couples with idiopathic infertility. A total of 350 patients were given 200 mg of the extract daily and follow-up semen analyses were performed every 3 months for 9 months. Of these 350 patients, 75 patients completed one full cycle of 3 months. Follow-up semen analyses in these patients showed significant improvement in all semen parameters. The proprietary extract of Eurycoma longifolia Jack significantly improved the sperm quality in these patients, allowing for 11 （14.7%） spontaneous pregnancies.

关键词： male infertility medicinal herbs semen

Bioremediation and detoxification of real refinery oily sludge using mixed bacterial cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Research 2021年第3期6卷 303-308页

作者： Rusul m.Khazaal Zainab Z.ismail minitry of 0il/Petroleum Research and Development Center Baghdadlraq Department of Environmental Engineering University of BaghdadBaghdadIraq

Anaerobic biotreatment of real field petroleum refinery oily sludge(PROS)was investigated under using four different organic loads(OLs)in the order ofOL4>OL3>OL2>OL1,in bench-scale *** bioremediation of raw PROS was carried out using mixed culture biocatalyst without chemicals addition or any type of *** results revealed a potential performance of the used biocatalyst dominated by Pseudomonas aeruginosa(class:Gammaproteo)and Staphylococcus spp.(class:Bacilli)achieving significant removal of chemical oxygen demand(COD)and total petroleum hydrocarbons(TPH).The highest organic removal rate was recorded in OL4 followed by OL3,0L2,OL1,respectively indicating a positive relationship between the percentage removal of organics and their *** removal efficiencies of 96.7%and 90%were observed for COD and TPH,respectively in OL4 within 14 days *** of polycyclic aromatic hydrocarbons(PAHs)demonstrated that acenaph-thylene and phenanthrene exhibited the maximum removal efficiency(almost complete)among the 8-priority PAHs tested in this ***,the overall degradation of PAHs in the oily sludge was 83.3%.

关键词： Petroleum oily sludge Anaerobic biodegradation Organic loading Total petroleum hydrocarbons Polycyclic aromatic hydrocarbons

A Q-Switched Erbium-Doped Fiber Laser with a Carbon Nanotube Based Saturable Absorber

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第11期29卷 67-69页

作者： S.W.Harun m.A.ismail F.Ahmad m.F.ismail R.m.Nor N.R.Zulkepely H.Ahmad Department of Electrical Engineering University of Malaya 50603 Kuala LumpurMalaysia Photonics Research Center Department of PhysicsUniversity of Malaya50603 Kuala LumpurMalaysia Department of Physics University of Malaya50603 Kuala LumpurMalaysia

We demonstrate a simple,compact and low cost Q-switched erbium-doped fiber laser(EDFL)using single-wall carbon nanotubes(CNTs)as a saturable absorber for possible applications in metrology,sensing,and medical *** EDFL operates at around 1560 nm with repetition rates of 16.1 kHz and 6.4 kHz with saturable absorbers SA1 and SA2 at a pump power of 120 *** absorbers are constructed by optically driven deposition and normal deposition *** is observed that the optical deposition method produces a Q-switched EDFL with a lower threshold of 70 mW and better Q-switching performance compared to that of the normal deposition *** EDFL also has pulse energy of 90.3 nJ and pulse width of 11.6μs at 120 mW pump power.

关键词： pump switched Erbium