排序方式: 共有98条查询结果,搜索用时 15 毫秒
51.
Yazdani Elahe Kazemi Miraki Maryam Salamatmanesh Arefe Azarnia Jamshid Azizi Kobra Ghandi Leila Heydari Akbar 《Research on Chemical Intermediates》2019,45(4):1775-1793
Research on Chemical Intermediates - A novel copper(II)–salen complex was immobilized on the surface of magnetite nanoparticles using chitosan as a linker. This system exhibits superior... 相似文献
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Alan G. Macdiarmid Jamshid K. Avlyanov Feng Huang Zheyuan Huang Hsing-Lin Wang Pen-Cheng Wang Arthur J. Epstein 《Macromolecular Symposia》1997,118(1):445-450
Light-emitting electroluminescent diodes and electrochemically-driven electroluminescent devices involving conjugated polymers are described. The effect on the properties of polypyrrole films (deposited from aqueous polymerizing solutions of pyrrole) caused by the hydrophilicity/hydrophobicity of the substrate surface is utilized by a “microcontact printing” technique to form patterned liquid crystal display devices. 相似文献
54.
Jamshid Soltani-Nabipour Khorshidi Abdollah Sadeghi Farideh 《Physics of Particles and Nuclei Letters》2019,16(6):789-795
Physics of Particles and Nuclei Letters - Background: From the health physics perspective, radon gas is one of the most dangerous gases in residential and business environments. According to the... 相似文献
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Mohammad Amjadi Jamshid L. Manzoori Javad Hassanzadeh 《Central European Journal of Chemistry》2010,8(3):536-542
The surfactant to dye binding degree (SBDB) methodology was used to determine fluvoxamine maleate and citalopram hydrobromide.
Neutral red and sodium dodecyl sulfate (SDS) were used as the dye and surfactant, respectively, to form dye-surfactant aggregates.
When a cationic drug is added to dye-surfactant mixture, it interacts with the surfactant and decreases the dye-surfactant
binding degree. This decrease is proportional to the drug concentration. This was measured by monitoring the absorbance changes
of the dye at 532 nm. Under the optimum conditions, the calibration graphs were linear over the range of 1.2–15 μg mL−1 and 1.1–15 μg mL−1 for fluvoxamine maleate and citalopram hydrobromide, respectively. The detection limits (signal to noise ratio = 3) were
found to be 0.37 and 0.35 μg mL−1, for fluvoxamine maleate and citalopram hydrobromide, respectively.
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56.
In petroleum exploration and production operations, gas hydrates pose serious flow assurance, economic and safety concerns. Thermodynamic inhibitors are widely used to reduce the risks associated with gas hydrate formation. In the present study, systematic laboratory work was undertaken to determine synergistic effects between methanol and a Poly Vinyl Methyl Ether as Low Dosage Hydrate Inhibitors (LDHIs). A valuable effect was discovered at a certain ratio of methanol to the low dosage hydrate inhibitor. 相似文献
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Gas compressibility factor (z-Factor) is one of the most important parameters in upstream and downstream calculations of petroleum industries. The importance of z-Factor cannot be overemphasized in oil and gas engineering calculations. The experimental measurements, Equations of State (EoS) and empirical correlations are the most common sources of z-Factor calculations. There are more than twenty correlations available with two variables for calculating the z-Factor from fitting in an EoS or just through fitting techniques. However, these correlations are too complex, which require initial value and more complicated and longer computations or have magnitude error. The purpose of this study is to develop a new accurate correlation to rapidly estimate z-Factor. Result of this correlation is compared with large scale of database and experimental data also. Proposed correlation has 1.660 of Absolute Percent Relative Error (E_(ABS)) versus Standing and Katz chart and has also 3.221 of E_(ABS) versus experimental data. The output of this correlation can be directly assumed or be used as an initial value of other implicit correlations. This correlation is valid for gas coefficient of isothermal compressibility (c_g) calculations also. 相似文献
58.
Ali Nakhaei Pour Mohammad Reza Housaindokht Sayyed Faramarz Tayyari Jamshid Zarkesh 《天然气化学杂志》2010,19(4):441-445
Kinetic parameters of nano-structured iron catalyst in Fischer-Tropsch synthesis (FTS) were studied in a wide range of synthesis gas conversions and compared with conventional catalyst. The conventional Fe/Cu/La catalyst was prepared by co-precipitation of Fe and Cu nitrates in aqueous media and Fe/Cu/La nanostructure catalyst was prepared by co-precipitation in a water-in-oil micro-emulsion. Nano-structured iron catalyst shows higher FTS activity. Kinetic results indicated that in FTS rate expression, the rate constant (k) increased and adsorption parameter (b) decreased by decreasing the catalyst particle size from conventional to nano-structured. Since increasing in the rate constant and decreasing in the adsorption parameter affected the FTS rate in parallel direction, the particle size of catalyst showed complicated effects on kinetic parameters of FTS reaction. 相似文献
59.
Zahra Mohammadzahery Maryam Jandaghi Samira Alipour Siamak Dadras Shahram Kazemi Jamshid Sabbaghzadeh 《Optics & Laser Technology》2012,44(4):1095-1100
This study deals with the thermal characterization of a continuous wave (CW-) and end-pumped passively Q-switched microchip Nd:YAG laser crystal by solving the rate and heat transfer equations in the laser cavity. In this approach, a parametric study has been performed to investigate the influence of the pumping parameters, cooling metal dimension and also the crystal dimension and doping concentration on the thermal behavior of the laser crystal. Obtained results reveal a closed correlation between the mentioned parameters and the thermal behavior of the crystal indicating that a proper selection of the laser parameters is essential to control the crystal's temperature and improve the performance of the laser accordingly. 相似文献
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Phosphorus oxychloride efficiently promoted the synthesis of sulfonamides and sulfonic esters from thiols with hydrogen peroxide in the presence of Amberlite IRA-400 (OH?). This method has been applied to a variety of substrates including nucleophilic and sterically hindered amines, and also phenols with excellent yields of sulfonamides and sulfonic esters. In most cases these reactions are highly selective, simple, and clean, affording products in excellent yields and high purity. 相似文献