Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Raman Spectroscopic Studies of Bioactive Materials
1
5
EN
Amanollah
Aminzadeh
College of Chemistry, Isfahan University of Technology, Isfahan, 84154, I.R. IRAN
arastou@cc.iut.ac.ir
Mohammad
Sarfaraz
College of Chemistry, Isfahan University of Technology, Isfahan, 84154, I.R. IRAN
Abbas
Yalan
College of Chemistry, Isfahan University of Technology, Isfahan, 84154, I.R. IRAN
10.30492/ijcce.2002.9542
<em>Bioactive materials including glass and glass-ceramics are nowadays used as medical implants for orthopedic applications. In this study several samples of glass-ceramics have been prepared using both heat treatment and sol-gel processes. The structure and bioactivity of these samples based on their interaction with simulated body fluid (SBF) have been determined. In-vitor, using the Raman spectroscopic technique. It is found that most samples exhibit bioactivity when they are soaked in SBF. It is also concluded that Raman spectroscopy is a powerful technique in such studies.</em>
Raman spectroscopy,Bioactive Materials,Glass-Ceramics,Hydroxyapatite
https://ijcce.ac.ir/article_9542.html
https://ijcce.ac.ir/article_9542_5fe259f779c99318b75f19c77a8a0510.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
2H Isotope Effect on 13C Chemical Shifts of Nitro-Benzo-9-Crown-3
6
12
EN
Abolghasem
Moghimi
Chemistry Department, University of Imam Hossein, Tehran, P.O. Box 16575-347, I.R. IRAN
abmoghimi@yahoo.com
Majid
Rastegar
Chemistry Department, University of Tehran, Tehran, I.R. IRAN
Mahdi
Ghandi
Chemistry Department, University of Tehran, Tehran, I.R. IRAN
Hamid Reza
Bijanzadeh
Chemistry Department, University of Tarbiat Modares, Tehran, I.R. IRAN
10.30492/ijcce.2002.9544
<em>Deuterium substitution on two ortho-substituted-OCH<sub>2</sub>-fragments in Nitro-Benzo-9-Crown-3 induces low frequency shifts, positive <sup>mn</sup></em><em>D</em><em>Cj, in all <sup>13</sup>C NMR resonances which is an indication of the increased shielding in this crown ether. The magnitude of these shifts vary from <sup>15</sup></em><em>D</em><em>C7=716 to <sup>54</sup></em><em>D</em><em>C3=15 ppb for C7 and C3 CD<sub>3</sub>COCD<sub>3</sub>, and C<sub>6</sub>D<sub>6</sub> on <sup>mn</sup></em><em>D</em><em>Cj values were investigated. The <sup>mn</sup></em><em>D</em><em>Cj values depended more on the nature of the solvent than on the concentration. The order of induced isotope shifts is: <sup>15</sup></em><em>D</em><em>, <sup>51</sup></em><em>D</em><em>><sup>24</sup></em><em>D</em><em>, <sup>42</sup></em><em>D</em><em>><sup>34</sup></em><em>D</em><em>, <sup>43</sup></em><em>D</em><em>><sup>56</sup></em><em>D</em><em>, <sup>65</sup></em><em>D</em><em>><sup>45</sup></em><em>D</em><em>, <sup>54</sup></em><em>D</em><em>. The isotope shifts observed are suggested to be a sum of contributions from low frequency shift due to inductive-type and negative hyperconjugation perturbations. The C-D bond, as a poorer electron acceptor than a C-H bond induces less positive charge on directly attached oxygens O1 and O2. This in turn, causes shielding of C1 and C2 in C1O1CD<sub>2</sub> and C2O2CD<sub>2</sub> fragments. The difference in <sup>34</sup></em><em>D</em><em>C1 and <sup>43</sup></em><em>D</em><em>C2 values is attributed to the conformational dependence of the negative hyperconjugation. The C1 and C2, are in fact, not equally affected by the two CD<sub>2</sub> groups by negative hyperconjoagation because of the existence of NO<sub>2</sub> group attached to the benzene ring.</em>
NMR,13C NMR,2H isotope shift,2H isotope labeling,Crown Ethers,Nitro-Benzo-9-Crown-3
https://ijcce.ac.ir/article_9544.html
https://ijcce.ac.ir/article_9544_7e83964c971d4eb728e86c2fa121bd75.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Pretreatment of Brackish Water Using DC-Electrocoagulation- Method and Optimization
13
20
EN
Nezameddin
Daneshvar
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Tabriz, 51664, I.R. IRAN
nezam_daneshvar@yahoo.com
Habib
Ashassi
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Tabriz, 51664, I.R. IRAN
Rohan
Rakhshaei
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Tabriz, 51664, I.R. IRAN
10.30492/ijcce.2002.9545
<em>Electrochemically generated iron can remove most contaminants present in water and wast water, by precipitation, adsorption, electrostatic interaction, and complex formation (generally called electrocoagulation-EC). In the present paper, pretreatment of brackish water having high total hardness (TH), alkalinity (A), and Cl¯ ions, is studied by application of a DC-electrical current ot the iron electrodes. Operating parameters such as electrical current density, volume flow, surface area of electrodes, distance between the two electrodes, water temperature, aerating flow, retention time, contact time of produced sludge before and after the process, addition of coagulant aid (bentonite) and the colloidal additive (clay particles) were optimized. Thie results of this study for a brakish sample with 11.8 TH, 5.6 (A), 12.4 , and 23.5 Cl¯ meq/lit indicate that the process is able to lower more than %94 the (TH), %92 (A), %50 and %43 Cl¯.</em>
Pretreatment,Bracish water,electrocoagulation,Electrochemial removal,Bentonite,Clay
https://ijcce.ac.ir/article_9545.html
https://ijcce.ac.ir/article_9545_47ab7781c3ed866a12e3fb8a94586a3d.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
The Electrochemical and Spectroscopic Studies of trans-[LCo((DO)(DOH)pn)L'] Complexes
21
27
EN
Ali Reza
Rezvani
Chemistry Department, Sistan & Baluchestan University, Zahedan, P.O. Box 98135-674, I.R. IRAN
rezvani2001ir@yahoo.ca
Hassan
Hadadzadeh
Chemistry Department, Sistan & Baluchestan University, Zahedan, P.O. Box 98135-674, I.R. IRAN
hadad@cc.iut.ac.ir
10.30492/ijcce.2002.9546
<em>Six new complexes of the type trans-[LCo((DO)(DOH)pn)L'] where (DO)(DOH)pn= N<sup>2</sup>, N<sup>2'</sup>-propanediolbis (2,3-butanedione 2-imine 3-oxime), L-Cl¯ and L'=mono-anaion of phenylcyanamide (pcyd), 2,5-dichlorophenylcyanamide (2,5-Cl<sub>2</sub> pcyd), 2,4-dimethyl pehylcyanamide (2,4-Me<sub>2</sub> pcyd) and L=L'=pcyd, 2,5-Cl<sub>2</sub> pcyd, 2,4-Me<sub>2</sub> pcyd, have been synthesized and characterized by elemental analysis, spectroscopy and cyclic voltammetry. The electronic absorption spectra of the Co(III) complexes show two low-energy ligand to metal charge transfer band that are associated with Co(III)-NCN chromophore. The cyclic voltammogrm of these complexes exhibit two subsequent quasi-reversible reduction couple repated to Co(III)/Co(II) and Co(II)/Co(I), respectively.</em>
Oxime,Phenylcyanamide,Cyclic voltammetry,LMCT,Quasi-reversible reduction
https://ijcce.ac.ir/article_9546.html
https://ijcce.ac.ir/article_9546_adc0dbff34dde77adcd3d3db0a0da1a8.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Application of the 1,2-Dihydroxybenzene-3,5-Disulfonic Acid for Separation and Preconcentration of Trace Iron and Determination by Eight Order Derivative Spectrophotometry
28
36
EN
Mohammad Ali
Taher
Department of Chemistry, Shahid Bahonar University, Kerman, P.O. Box 76175-133, I.R. IRAN
ma_taher@yahoo.com
10.30492/ijcce.2002.9547
<em>Iron is quantitatively retained on an adsorbent made by coprecipitation of 1,2-dihydroxybenzene-3,5-disulfonic acid (Tiron) and tetradecyldimethylbenzylammonium choride (TDBA) an microcrystalline naphthalene as a slurry or packed in a column, in the pH range 6.0-9.0 from a large volumes of aqueous solutions (up to 200 ml on microcrystalline naphthalene and up to 500 ml of aqueous solutions in the case of column method) of various samples. After filtration, the solid mass consisting of iron complex and naphthalene is dissolved in 5 ml of dimethylformamide and the metal determinate by eight derivative spectrophotometry. Alternatively iron can be quantitatively adsorbed on Tiron-TDBA-naphtalene adsorbent packed in a column at a flow rate of 0.5 to 5.0 ml/min and determined similarly. About 0.05 </em><em>m</em><em>g of iron can be concentrated in a column from 500 ml of aqueous sample, where its concentration is as low as 0.1 ng/ml. Various parameters such as the effect of pH, volume of aqueous phase and interference of a number of metal ions on the determination of iron have been studied in detail to optimize the conditions for its determination in standard alloys and biological samples.</em>
Trace iron determination,Eight derivative spectrophotometry,Tiron-TDBA-naphthalene
https://ijcce.ac.ir/article_9547.html
https://ijcce.ac.ir/article_9547_8cdfb9880a1d1b6843d05c5f247e7e35.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Investigation of Methanol Reaction Chemistry on H-ZSM-5 and -11
37
43
EN
Fatollah
Salehirad
Research Institute of Petroleum Industry, P.O. Box 18745-4163, Tehran, I.R. IRAN
salehiradf@ripi.ir
10.30492/ijcce.2002.9548
<em>In order to gain a better understanding of the chemistry of methanl-to-hydro-carbon conversion, it is necessary to determine the nature of the primary reaction products. Experiments carried out in this work on H-ZSM-11, using a continuous flow reactor linked to an on-line gas chromatograph demonstrated that ethylene and methane are the primary reaction products. The results obtained using solid state MAS NMR for the same reaction further support the findings of this work. The results from H-ZSM-5 catalyst do not confirm that the CO of the reaction acts as a catalyst. </em>
Methanol conversion,Pentasil zeolites,Reaction chemistry
https://ijcce.ac.ir/article_9548.html
https://ijcce.ac.ir/article_9548_b9433aafd91f62fdf9a36971e47dfd61.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
FT-Raman Spectroscopic Studies of Nd/YAG Laser Irradiated Human Dental Enamel
44
46
EN
Amanollah
Aminzadeh
College of Chemistry, Isfahan University of Technology, Isfahan, 84154, I.R. IRAN
arastou@cc.iut.ac.ir
Sima
Shahabi
Faculty of Dentistry, Isfahan University of Medical Science, Isfahan, 81746, I.R. IRAN
L.J.
Walsh
Faculty of Dentistry, University of Queensland, Brisbane Qld 4000, Australia
10.30492/ijcce.2002.9549
<em>FTR-Raman Spectra of human dental enamel, both laser-irradiated and untreated, are reported. Spectra are compared with hydroxyapatite. It is evident that unlike the CO<sub>2</sub> laser, the Nd/YAG laser does not induce any chemical change in dental enamel.</em>
FT-Raman Spectroscopy,Nd/YAG laser,Human dental enamel,Hydroxyapatite
https://ijcce.ac.ir/article_9549.html
https://ijcce.ac.ir/article_9549_3f32124d95603c25436f717488996017.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
In Situ Analysis of Gut Residue of Corophium Volutator (Pallas) by Electron Probe Microanalysis after Exposure to Barytes Spiked Sediments
47
54
EN
Tariq M.
Ansari
Department of Chemistry, Bahauddin Zakariya University, Multan 60800, Pakistan
drtariq2000@hotmail.com
Iain L.
Marr
Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, United Kingdom
Alison M.
Coats
Department of Chemistry, University of Aberdeen, Meston Walk, Old Aberdeen AB24 3UE, United Kingdom
10.30492/ijcce.2002.9550
<em>Corophium volutator (Pallas) has been recommended by the paris Commission as one of the standard species for testing chemical used in offshore oil and gas exploration/production. In the present study, gut contents of Corophium volutator have been analysed by electron probe microanalysis (EPMA) for BaSO<sub>4</sub> and other heavy metal impurities after exposure tto spiked sediments following a standard ASTM sediment bioassay protocol. Results show that depuration of Corophium gut for 48 h in clean filtered seawater after exposure to sediments containing barites, prior to whole body metal analysis, is required to reflect the true metal burdens</em>
Corophium volutator (Pallas),Electron probe microanalysis (EPMA),Barytes,Gut residue
https://ijcce.ac.ir/article_9550.html
https://ijcce.ac.ir/article_9550_853d8901a8c6b2a7903c249b79c37be9.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Decomposition of Anionic Sodium Dodecylnemzene Sulfonate by UV/TiO2 and UV/H2O2 Processes a- Comparison of Reaction Rates
55
62
EN
Nezameddin
Daneshvar
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Zipcode 51664, Tabriz, I.R. Iran
nezam_daneshvar@yahoo.com
Daryoosh
Salari
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Zipcode 51664, Tabriz, I.R. Iran
Mohammad Ali
Behnasuady
Department of Applied Chemistry, Faculty of Chemistry, Tabriz University, Zipcode 51664, Tabriz, I.R. Iran
10.30492/ijcce.2002.9551
<em>Anionic DBS surfactant can be photodegraded in a TiO<sub>2</sub> dispersion and H<sub>2</sub>O<sub>2</sub> solution under an Hg-lamp (15 W) UV illumination or solar exposure. Degradation process has been monitored through cleavage of aromatic moiety. Degradation of the detergent was small when the photolysis was carried out in the absence of TiO<sub>2</sub> and H<sub>2</sub>O<sub>2</sub> and it was negligible in the absence of light. Most of the curves representing the semi-log of pollutant concentration versus time were nearly linear, suggesting first order reactions. In the UV/TiO<sub>2</sub> process, the extent of surfactant degradation was found to be influenced by the TiO<sub>2</sub> loading, initial detergent concentration, agitation rate, temperature and initial pH. The UV peroxide degradation of the anionic detergent (DBS) by the UV/H<sub>2</sub>O<sub>2</sub> process is more effective the UV/TiO<sub>2</sub> process making it a promissable method for destroying the aquatic pollutants. A combination of UV and Solar light is used, degradation of DBS it is more effective than UV/H<sub>2</sub>O<sub>2</sub> process.</em>
Dodecylbenzene sulfonate,Hydrogen peroxide,Photocatalytic mineralization,Photooxidation,Titanium dioxide,Photodegradation
https://ijcce.ac.ir/article_9551.html
https://ijcce.ac.ir/article_9551_cef8c8b0759b88e71bba8c5fca5ee587.pdf
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
21
1
2002
07
01
Performance of 2-Amino Tetraphenyl Porphyrin as Stationary Phase in RP-HPLC of Amino Acids
63
67
EN
Majid
Soleimani
Chemistry Department, Tehran Teacher Training University, Tehran, I.R. Iran
Mohammad Nabi
Sarbolouki
Institute of Biochemistry and Biophysics, Tehran University, P.O. Box 13145-1384, Tehran, I.R. Iran
sarbol@ibb.ut.ac.ir
10.30492/ijcce.2002.9552
<em>The search for new stationary phases has been one of the predominant concerns in high performance liquid chromatography (HPLC) in order to achieve better resolutions, longer column lives, and reduce the time of analysis. A chromatographic packing for separation of underivatized amino acids (AAs) were prepared by dynamically coating 2-amino tetraphenyl prophyrin (atpp) on a C-18 reversed-phase packing and its properties were examined. The retention characteristics of 20 AAs forming the building blocks of proteins were investigated on the atpp coated C-18 column at pH 7. Results obtained seem to confirm a mixed mechanism of retention involving the hydrophobic interaction between the aromatic porphyrin macrocycle and some of the AAs, </em><em>p</em><em>-</em><em>p</em><em> interaction between the </em><em>p</em><em>-electrons of the porphyrin macrocycle and the </em><em>p</em><em>-electrons of analyte, and the hydrogen bonding interactions between Ass and the porphyrin nitrogens.</em>
Amino acids,Stationary phase,Amino tetraphenyl porphyrin (atpp),Reverse phase,RP-HPLC Analysis,Hydrophilic,Hydrophobic,H-bonding,- interaction
https://ijcce.ac.ir/article_9552.html
https://ijcce.ac.ir/article_9552_4d2acbf5720fa764e976fd29db1b8b88.pdf