Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Experimental Survey on Microwave Drying of Porous Media110778910.30492/ijcce.2005.7789ENAkbar Khodaparast HaghiFaculty of Engineering, University of Guilan, P.O. Box 41635- 3756, Rasht, I. R. IRANHossein GhanadzadehFaculty of Engineering, University of Guilan, P.O. Box 41635- 3756, Rasht, I. R. IRAN0000-0002-9181-8961Daniel RondotL'Université de Franche Comte Besancon, FRANCEJournal Article20031005<em>The cost of drying carpet which is done toward the end of the manufacturing process, is quite high. The carpet industry has been using convection drying for many years. Little attention has been given to quantifying the effect of microwave power during the drying of carpet. An experimental system was developed whereby air was introduced into the cavity of a domestic microwave oven. The results indicated that microwave power levels and sample specifications are the most important parameters, with statistically significant effects on the drying constants.</em>https://ijcce.ac.ir/article_7789_66261b8d8e8b789028fae4dd1f6d875f.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Synthesis and Characterization of PMMA with 4 - Carbazole Chromophore Substitution1115811910.30492/ijcce.2005.8119ENMansoor Keyanpour RadMaterials and Energy Research Center, P. O. Box 14155-4777, Tehran, I. R. IRANJournal Article20040306<em>A new carbazole- containing polymer has been synthesized for further photophysical studies. Efficient synthesis of the substituted methyl methacrylate has been accomplished via microwave assisted synthesis of 1 - chloro - 4</em><em>-</em><em>carboxy -</em><em>5,</em><em>6, 7, 8- tetrahydrocarbazole followed by further steps, such as reduction of the 4-substituted methyl carboxylate, dechlorination of the ring and at last, the reaction of the 4 - hydroxymethyl - 9 - ethyl carbazole with methacryloyl chloride. </em><em>The resulting monomer was then polymerized free-radically to form the polymer, having a distribution M<sub>w</sub>/M<sub>n</sub> of 2.6.</em>https://ijcce.ac.ir/article_8119_72f68af008689ba09ce286b81c71f6eb.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601The Study of Electrochemical Behavior of Mono and Dinuclear Co(III) Complexes, trans-[pyCo((DO)(DOH)pn)(L)]PF6 and [{pyCo((DO)(DOH)pn)}2(μ-dicyd)](PF6)21720812010.30492/ijcce.2005.8120ENAli Reza RezvaniChemistry Department, Sistan and Baluchestan University,
P.O. Box 98135-674, Zahedan I. R. IRANHassan HadadzadehChemistry Department, Sistan and Baluchestan University,
P.O. Box 98135-674, Zahedan I. R. IRANJournal Article20040607<em>Electrochemical behavior of the new mono and dinuclear Co (III) complexes of the types trans-[pyCo((DO)(DOH)pn )(L)]PF<sub>6 </sub>and [{py Co((DO)(DOH)pn)}<sub>2 </sub>(</em><em>μ</em><em>-dicyd)] (PF<sub>6</sub>)<sub>2</sub> <sub> </sub> have been studied in acetonitrile solution. All the mono nuclear complexes show two quasi- reversible reduction couples associate to Co(III/II)and Co(II/I). Each of these redox couples split to two one electron waves in dinuclear complex.</em>https://ijcce.ac.ir/article_8120_c7e58f90593bff0e8f7a7df17da9c9ff.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Synthesis, Characterization, Electrochemical and Spectroelectrochemical Properties of Ruthenium(II) Complexes Containing Phenylcyanamide Ligands and Effect of the Inner- Sphere on the Ru-NCN Chromophore2130812110.30492/ijcce.2005.8121ENHassan HadadzadehChemistry Department, Sistan and Baluchestan University,
P.O. Box 98135-674, Zahedan I. R. IRANAli Reza RezvaniChemistry Department, Sistan and Baluchestan University,
P.O. Box 98135-674, Zahedan I. R. IRANJournal Article20040607<em>[Ru(terpy)(bpy)(L)]PF<sub>6</sub> complexes, where terpy is 2,2</em><em>΄</em><em>:6′,2″– terpyridine, bpy is 2,2</em><em>΄</em><em> - bipyridine and L is monoanions of 4 - bromophenylcyanamide (4 - Brpcyd), 4-methoxyphenylcyanamide (4 - MeOPcyd), 2, 4 - dibromophenylcyanamide (2,4 - Br<sub>2</sub>pcyd), 2,4-dimethylphenylcyanamide (2,4 - Me<sub>2</sub>pcyd), 2 - methylphenylcyanamide (2 - MePcyd), phenylcyanamide (Pcyd) and naphtylcyanamide (ncyd) have been prepared and characterized by elemental analysis, IR, <sup>1</sup>H-NMR and UV-vis spectroscopies and cyclic voltammetry. Spectroelectrochemistry was used to generate the electronic absorption spectra of the Ru(III) complexes, [Ru(terpy)(bpy)(L)]<sup>2+ </sup> in acetonitrile solution. The spectral data associated with the Ru(III)-cyanamido LMCT chromophore were compared to those derived from Ru(III) analogues in order to gain a greater understanding the effect of spectator ligands on the nature of the Ru(III)-Cyanamide bond.The data supports greater covalency in the Ru(III)-cyanamide bond of [Ru(terpy)(bpy)(L)]<sup>2+</sup> complexes compared to their Ru(III) analogues.</em>https://ijcce.ac.ir/article_8121_6a6ce9cfa20e4d5f9f19a5f3ba8ccf6a.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601The Effect of Micro Silica on Permeability and Chemical Durability of Concrete Used in the Corrosive Environment3137812210.30492/ijcce.2005.8122ENMohammad Reza NilforoushanFaculty of Engineering, University of Shahrekord,
P.O.Box 115, Shahrekord, I. R. IRANJournal Article20031111<em>Micro silica (MS) is an extremely fine, spherical powder that is used as an additive for improving concrete performance. It is obtained as a by product of silicon metal and ferrosilicon alloy production. Due to its pozzolanic nature, micro silica can be used to enhance the qualities of both fresh and hardened concrete. </em><em>Addition of micro silica into the concrete as a cement replacement, decreases its permeability. </em><em>As a result, it forms very dense and chemically durable concrete to withstand the harsh and corrosive chemical environments.</em><em>The results of detailed investigations on concrete made from type V cement with addition of </em><em>micro silica as substituent and its curing by tap water shows dramatic increase is compressive strength (CS) of concrete after 7 days of hydration onwards. By repeating experiment in sodium sulfate solutions (50 gr/</em><em>lit) prepared under ASTM C1012 requirements, the results were same as tap water but the extend of increase of compressive strength is lower. It is also confirmed that, micro silica modies pore size distribution and permeability of type V cement concreats in same way as reported for ordinary Portlant cement in various literature. By replacing micro silica as a substituent in type V cement composition, a concreat with high chemical durability and strength are formed, which easily can be used as suitable material for harsh environments such as marine and offshore structures or the places where the concentration of sulfate ions are high, such as concrete sewage pipe line networks.</em>https://ijcce.ac.ir/article_8122_0c49afe2341a7d4cab9575e510cf2f81.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Reaction of 1, 1′, 2, 2′-Tetrakis (phenylamino) Ethane with Glyoxal; Synthesis of N2, N3, N7, N8, 1, 4, 5, 6, 9, 10 -Decaphenyltetradecahydro - dipyrazino [2, 3-b: 2, 3-e] Pyrazine-2, 3, 7, 8 -Tetraamine and 5, 6 -bis (ethoxy) -N2, N3, 1, 4 -Tetraphenylhexahydro -2, 3- Pyrazinediamine3942812310.30492/ijcce.2005.8123ENAli KakanejadifardDepartment of Chemistry, Faculty of Science, University of Lorestan,
Khoramabad, I. R. IRANSayed Morteza FarniaDepartment of Chemistry, Faculty of Science, University of Tehran, I. R. IRANIssa KakoiedinakiDepartment of Chemistry, Faculty of Science, University of Tehran, I. R. IRANJournal Article20030703<em>Compound N<sup>2</sup>, N<sup>3</sup>, N<sup>7</sup>, N<sup>8</sup>, 1, 4, 5, 6, 9, 10-decaphenyltetradecahydrodipyrazino [2, 3-b: 2, 3-e] pyrazine-2, 3, 7, 8-tetraamine (4) was prepared by condensation of 1, 1′, 2, 2′-tetrakis (phenylamino) ethane (1d) and glyoxal in EtOH or i-PrOH. Also, reaction of 1d with glyoxal in equimolare in EtOH resulted 5,6-bis (ethoxy)-N<sup>2</sup>, N<sup>3</sup>, 1, 4-tetraphenylhexahydro-2, 3-pyrazinediamine (5). The natures of products are sensitive to acidity, temperature and solvent. In acidic media, 4 and 5 are unstable and degraded to diimine 6.</em> <em> </em>https://ijcce.ac.ir/article_8123_126cf4002691b6b2a4bcd6dd1bded6fe.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Experimental Evaluation of Batch and Continuous Production of Baker’s Yeast under Computer Controlled pH4349812410.30492/ijcce.2005.8124ENHamid-Reza Kariminiaae HamedaaniDepartment of Chemical and Petroleum Engineering, Sharif University of Technology,
P.O. Box 11365-9465, Tehran, I. R. IRANMohammad ShahrokhiDepartment of Chemical and Petroleum Engineering, Sharif University of Technology,
P.O. Box 11365-9465, Tehran, I. R. IRANReza RoostaazadDepartment of Chemical and Petroleum Engineering, Sharif University of Technology,
P.O. Box 11365-9465, Tehran, I. R. IRANJournal Article20040615<em>Steady state and dynamic fermentations of baker's yeast in molasses based media were analyzed in a laboratory scale bioreactor. Sugar and biomass balances together with the Monod biokinetics were used to develop the process model. Parameters of the model were obtained using collected experimental data. Model predicted open loop responses to step changes in feed concentration as well as dilution rate were compared with experimental data and a good agreement was observed. Despite the nonlinear nature of pH in a biological system, it was controlled successfully using a special on-off strategy implemented on a personal computer. Results proved that productivity of the continuous process was at least twice that of the batch process.</em>https://ijcce.ac.ir/article_8124_d2bbc4d60e7f706cd3b97bab8dac6edd.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Ion Current Simulation During the Post Flame Period in SI Engines5158812610.30492/ijcce.2005.8126ENAmir Hossein ShamekhiFaculty of Mechanical Engineering, K. N. Toosi University of Technology,
P.O.Box 16765-3381, Tehran, I. R. IRANAli GhaffariFaculty of Mechanical Engineering, K. N. Toosi University of Technology,
P.O.Box 16765-3381, Tehran, I. R. IRANJournal Article20040128<em>The application of ion current signals is one of the most recent approaches in engine management systems. By applying a small constant DC voltage across the electrodes of the spark plug and measuring the current through the electrode gap, the state of gas may be measured and investigated. In this paper a computer code is developed in order to analyze the state of gas during the combustion period. It is shown that there is a strong correlation between the peak pressure and the maximum current position. It is also shown that among all combustion products, the NO has the most contribution in generating electrical current. The two zones model is used for calculating the cylinder pressure and temperature. </em>https://ijcce.ac.ir/article_8126_be4b292dc793296faa89c15eed8bed5f.pdfIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry and Chemical Engineering1021-998624220050601Separation of Sedative – Hypnotic Drugs with Mixed Micellar Liquid Chromatography5963812510.30492/ijcce.2005.8125ENMohammad Reza HadjmohammadiDepartment of Chemistry, University of Mazandaran , P. O. Box 453, Babolsar, I. R. IRANAzadeh Shariphi AghiliDepartment of Chemistry, University of Mazandaran , P. O. Box 453, Babolsar, I. R. IRANJournal Article20040211<em><em>Separation of ten sedative- hypnotic drugs was performed by RP-HPLC using mixed micellar mobile phase. Effect of temperature, type and amount of organic modifier in mobile phase on efficiency (N) and asymmetry factor (B/A) showed that, the appropriate conditions for a good separation were 35°C and 7% (V/V) butanol in mobile phase. Variations of selectivity factor versus butanol concentration, Mixture of SDS/ Brij- 35 concentrations and pH of mobile phase showed that the appropriate conditions were 7%(V/V), 15 mM SDS +1.0mM Brij-35 and pH=3 in mobile phase respectively.</em> </em>https://ijcce.ac.ir/article_8125_21bad6dc9f08544be2c8bbf6f4693115.pdf