eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
1989-06-01
8
1
3
9
10.30492/ijcce.1989.12261
12261
Interaction Studies of Sodium N-Dodecyl Sulphate and Protons to Nistone H1
A.A. Moosavi Movahedi
1
M Godarzi
2
Institute of Biochemistry & Biophysics, University of Tehran, P.O. Box 13145-1384 Tehran, I.R. IRAN
Hamedan Medical Science University, Department of Biochemistry, Hamedan, I.R. IRAN
The relationship between the binding of sodium n-dodecyl sulphate and protons to histone H1 has been investigated by equilibrium dialysis and titrimetry. The data cover the pH range 3.2-10 and surfactant concentrations up to 3.0×10-3 mol dm-3. A theoretical approach based on the binding potential concept of Wyman is presented and has been used to make estimates of the apparent Gibbs energies of binding of both protons and surfactant ions to the surfactant-histone H1 complexes. The average Gibbs energies of sodium n-dodecyl sulphate binding to H1 equal 28 to 18 kJ/mol for pH 3.2 to 10 respectively.
https://ijcce.ac.ir/article_12261_d41d8cd98f00b204e9800998ecf8427e.pdf
Model resembling gear systems
Investigate the gear effect 2
3-Dialkyl-Bicyclo [2.2.1]-Heptane and 2
3-Dialkyl-Bicyclo[2.2.2.]-Octane
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
1989-06-01
8
1
10
19
10.30492/ijcce.1989.12262
12262
Flow Pattern Identification and Pressure Drop Calculation for Gas-Liquid Flow in a Horizontal Pipeline
Fathollah Farhadi
1
S. Eliyassi
2
Petoleum and Chemical Engineering Department, Sharif University of Technology, Tehran, I.R. IRAN
Oil industries Engineering & Construction Co., P.O. Box 188-16315 Tehran, I.R. IRAN
Two phase gas-liquid flow pattern in a horizontal pipeline is predicted very accurately using a newly-developed analytical relation. The pattern identification is based on one of the most widely used graphs, the Baker diagram, modified in a way that compensates for the unrealistic oversimplifications of recent works. The Kern's method of pressure drop calculation is used to obtain the frictional pressure drop in a gas-liquid pipeline flow. An interactive computer program is developed for the prediction of the flow pattern and calculation of pressure drop.
https://ijcce.ac.ir/article_12262_d41d8cd98f00b204e9800998ecf8427e.pdf
Gas-Liquid flow pattern
Kern's method
Pressure drop calculation
Frictional pressure drop
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
1989-06-01
8
1
21
31
10.30492/ijcce.1989.12263
12263
Quantitative and Qualitative Determination of Heavy and Toxic Elements in the Fish Grown in Treated Wastewater and Their Comparison with Other Fish
M.R Hadjmohammadi
1
S.H. Ghaziaskari
2
Institute of Chemistry, University of Mazandaran, Babolsar, I.R. IRAN
Institute of Chemistry, University of Mazandaran, Babolsar, I.R. IRAN
The elements Fe, Cu, Mn, Zn, Cr, Ni, Pb and Cd were determined in the meat and skin of fish by Atomic Absorption Spectroscopy (AAS). The fish were grown in treated wastewater, Zayanderood river, and fisheries of Flavarjan and Babolsar. Arsenic and mercury in the samples were analyzed by Inductively Coupled Plasma Emission Spectroscopy and Cold Vapor AAS, respectively. The concentration of the above mentioned elements in the meat and skin of missable levels, whereas the fish from Zayanderood river generally had higher levels, than the other fish, whereas concentration of Mn, Pb and Ni were higher than their respective permissible amounts. The concentration of Mo and Co in all the fish were below detectable amount. The elements Fe, Cu, Mn and Zn in the treated wastewater are determined quantitatively, whereas the other elements were below the detectable amount.
https://ijcce.ac.ir/article_12263_d41d8cd98f00b204e9800998ecf8427e.pdf
Quantitative determination
Qualitative determination
Heavy and Toxic Elements in the meat and skin of fish
Fish were grown in treated wastewater
Zayanderood river
Fisheries of Falavarjan and Babolsar
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
1989-06-01
8
1
32
36
10.30492/ijcce.1989.12264
12264
Gelatin Phantom
Hossein Gheraati
1
Department of Physics, Isfahan University, Isfahan, I.R. IRAN
For determining the absorbed dose of ionizing radiation is tissues, it is essential to have materials which behave like tissues. These kinds of materials are usually called phantom. Up to now many different compounds like water, rubber, Perspex etc have been used. Unfortunately, the practical use of each of them has had its own problems. Our suggested gelatin phantom is very similar to soft tissue from the point of effective atomic number, mass density and electron density. In comparison to the other phantoms, gelatin phantom is flexible and can be moulded easily in the shape of any body organ. The exact real absorbed dose can be measured in the depth of the body organ phantom. It can be used also for flattening the body curvatures for radiotherapy procedures. The preparation is quite easy and by adding some fungicide to it and keeping in a cold place it can be used for a long period of time.
https://ijcce.ac.ir/article_12264_d41d8cd98f00b204e9800998ecf8427e.pdf
Gelatin phantom
Ionizing radiation in tissues
Soft tissue
eng
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
Iranian Journal of Chemistry and Chemical Engineering
1021-9986
1989-06-01
8
1
37
40
10.30492/ijcce.1989.12265
12265
Two Model Compounds to Investigate the Gear Effect: 2,3-Dialkyl-Bicyclo[2.2.1]-Heptane and 2,3-Dialkyl-Bicyclo[2.2.2]-Octane
Mehran Ghiaci
1
Department of Chemistry, Isfahan University of Technology, Isfahan, I.R. IRAN
Compounds I, II and III, were used as models resembling gear systems (bods connecting CR3 groups to the skeletal molecule are parallel) in surveying the potential energy surface for their internal rotation. The magnitude of the barriers calculated for averaging the NMR signals, placed these compounds in the range of measurement accessible by dynamic NMR spectroscopy (which is currently being pursued).
https://ijcce.ac.ir/article_12265_d41d8cd98f00b204e9800998ecf8427e.pdf
Model resembling gear systems
Investigate the gear effect 2
3-Dialkyl-Bicyclo [2.2.1]-Heptane and 2
3-Dialkyl-Bicyclo[2.2.2.]-Octane