فهرست مطالب

International Journal of Science
Volume:5 Issue: 1, 2004

  • تاریخ انتشار: 1383/05/11
  • تعداد عناوین: 11
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  • V. Niknam, B. Sharifizadeh, H. Ebrahimzadeh, Sh. Zarre Page 1
    The present study is the first comparative study of some Trigonella species from Iran, reporting the seed protein content and possible use of SDS-PAGE profile of seed proteins in the Trigonella taxonomy. Quantitative analysis of seed proteins of the species and putative populations of Trigonella showed that content of proteins varied from 23.52 to 46.6% D.W. where the lowest protein content in T. monantha and the highest protein content in T. aphanoneora. The proteins content of seeds in most of the wild species of Trigonella was higher than that of T. foenum-graecum L. (29.93% D.W.). The electrophoretic patterns of seed proteins were compared for correct identification of the species. The electrophoretic profile varied among some putative populations of a single species. Overall, this study showed the quantitative and qualitative differences among the studied species and putaive populations. The values of seed protein electrophoretic profiles in the taxonomy of Trigonella species are discussedThe present study is the first comparative study of some Trigonella species from Iran, reporting the seed protein content and possible use of SDS-PAGE profile of seed proteins in the Trigonella taxonomy. Quantitative analysis of seed proteins of the species and putative populations of Trigonella showed that content of proteins varied from 23.52 to 46.6% D.W. where the lowest protein content in T. monantha and the highest protein content in T. aphanoneora. The proteins content of seeds in most of the wild species of Trigonella was higher than that of T. foenum-graecum L. (29.93% D.W.). The electrophoretic patterns of seed proteins were compared for correct identification of the species. The electrophoretic profile varied among some putative populations of a single species. Overall, this study showed the quantitative and qualitative differences among the studied species and putaive populations. The values of seed protein electrophoretic profiles in the taxonomy of Trigonella species are discussedThe present study is the first comparative study of some Trigonella species from Iran, reporting the seed protein content and possible use of SDS-PAGE profile of seed proteins in the Trigonella taxonomy. Quantitative analysis of seed proteins of the species and putative populations of Trigonella showed that content of proteins varied from 23.52 to 46.6% D.W. where the lowest protein content in T. monantha and the highest protein content in T. aphanoneora. The proteins content of seeds in most of the wild species of Trigonella was higher than that of T. foenum-graecum L. (29.93% D.W.). The electrophoretic patterns of seed proteins were compared for correct identification of the species. The electrophoretic profile varied among some putative populations of a single species. Overall, this study showed the quantitative and qualitative differences among the studied species and putaive populations. The values of seed protein electrophoretic profiles in the taxonomy of Trigonella species are discussed.
  • Seid, Javad Hosseini, Elahe Elahi, Razieh M. Raie Page 13
    The chromosome number of Penaeus semisulcatus, which is commonly known as the green tiger prawn and which lives in the Persian Gulf, has been determined by three approaches and the efficacies of these approaches have been compared. In one, various tissues after intramuscular injection of colchicine, in another embryonic cells and in the third blastema tissue regenerated after amputation of a pair pereopods were used. All three approaches when optimized were effective and their results suggest that the diploid chromosome number of P. semisulcatus is 90. This figure falls within the range of diploid chromosome numbers previously reported for other species of shrimp (86 to 92). Most of the chromosomes of P. semisulcatus are metacentric
  • Nasris., Oryans., Haeri Rohania., Amin, Gh., Yahyavi, H Page 25
    Usually, the side effects of synthetic drugs appear after a long time of their usage. For that reason, these years, diseases treatment by herbal drugs is very interested. In this study, regarding to the mentioned purposes, we evaluate the effects of Vitex agnus castus L. (Vit.) fruit extract on the activity of Pituitary- Gonadal axis in Balb/C male mice. LD50 of the extract was obtained 1650 mg/kg. Regarding to the LD50 of the extract, the following doses (65, 165, 265, 365, 465 mg/kg) were injected intraperitoneally for 30 days in 5 groups of animals. After the last injection, we collected the blood samples and measured FSH, LH and testosterone by Radio Immuno Assay (RIA) technique. Vitex extract decreased the FSH, LH and testosterone levels comparing to the control and sham groups. The optimum dose was obtained 365 mg/kg. These results suggest that Vit. fruit extract has an anti-androgenic effect and probably acts through the Hypothalamic-Pituitary- Gonadal (HPG) axis
  • Alireza Badiei, Ghodsi Mohammadi Ziarani, Parviz Norouzi, Fatemeh Tousi Page 31
    The amount of cobalt (III) ions introduced into the mesopores has been controlled by the concentration of the cobalt complex in the exchange solution and the existing percentage of silanolate on the surface. The obtained FTIR results show that a part of surfactants retain in the channel during the ion exchange in absolute and dry ethanol. The colour change during this process indicates that cobalt undergoes substitution reactions within its coordination sphere. UV-visible characterization, consistent with previous study of EXAFS spectroscopy confirms this evolution providing a full description of the complex. Several steps were identified for direct ion exchanged reaction that is include electrostatic adsorption of complex into the channel, formation of ion pair with macro-counter ion MTS, and grafting step with substitution reaction of macro-ligand MTS by formation of Co-O-Si bridge
  • Fereydoun Ghazban Page 43
    Geologic and geochemical investigation in Mount Taftan indicates a viable geothermal resource probably centered and upflowing beneath the volcano. This volcanic region in SE Iran has a very high potential for generation of geothermal energy. The presence of volcanos is intimately related to the subduction of Neotethys oceanic lithosphere under the Central Iranian continental plate. Magmatism in Mt. Taftan is represented by subalkaline volcanics that vary from basaltic through andesitic to dacitic composition. Springs with temperatures ranging from 10 to 35 °C are located in the prospect area, fed by the sedimentary aquifers. Based on geochemical and hydrological data, the thermal Cl-Ca-SO4 waters rise toward the surface from reservoirs made up of a volcano-sedimentary sequence through faults and fractures. Fumerolic and thermal discharges from this volcanic region contain deeply derived H2S with subsequent oxidation to SO4 -2 in the system. Based on Na-K-Mg ternary diagram, none of the discharge waters could be representative of deep fluids in “full equilibrium” with the reservoir rocks. The acid alteration in the shallow parts of Mt. Taftan results from the oxidation of H2S. Steam, accompanied by H2S rises from depth and produces acid sulfate fluids, which react with the surficial rocks to generate alteration mineral assemblages. The temperature range established from alteration mineralogy, overlaps with that determined from chemical geothermometers. The occurrence of hydrothermal alteration minerals at the surface indicates a low to moderate geothermal system. Clay mineral alteration assemblage encountered in Taftan geothermal system might have been superimposed on older and higher-temperature stages. The geothermal energy produced in the system is from the cooling magma, which is heating circulating groundwater. The magma-heated water, which emerges at the surface as fumerolic discharges and heats up the descending cold meteoric water, signals the presence of the shallow heat source beneath Mt. Taftan
  • Hassanzadehe., Ghadirian, H.A Page 63
    Permeability is one of the most important characteristics of hydrocarbon bearing formations. An accurate knowledge of permeability provides petroleum engineers with a tool for efficiently managing the production process of a field. Formation permeability is often measured in the laboratory from cores or evaluated from well test data. To carry out this study, 34 core samples from a carbonate oil field located in the south west of Iran have been considered. The Permeability of samples was measured using a PDPK™ apparatus, the porosity of each sample was measured and CT slices were taken in constant intervals across the samples. Thin sections in the horizontal and vertical directions were prepared from the end pieces of the samples and were analyzed by using the optical microscope. CT numbers corresponding to each slice were exported in the form of a spreadsheet. All such spreadsheets that belong to the i th sample, together with porosity and PDPK™ average permeability were called "i th data set". All data sets were considered as training examples of a back propagation artificial neural network, whilst the target was permeability. Validation of the network results was achieved by leaving out some of the data sets and comparing their measured permeabilities with calculated ones. To decrease calculation time, up scaling was applied on CT data by scales of 2:1, 4:1, 8:1, 16:1 and 32:1 and results were compared with each other. A better understanding of the relationship between volume percentage of minerals, porosity, CT scan data and permeability of carbonates is developed from this study.6
  • Behniap., Darvishzadeha., Collins, L.G Page 77
    Qooshchi granite has been intruded as an anorogenic, A type, within plate granite in an area north west of Orumieh Lake in western Azerbaijan, northwest Iran. The Precambrian crystalline basement has been intruded by gabbros and diorites. The gabbros are tholeiitic and metaluminous and are suggested to have been converted into alkalic through calc-alkalic compositions during K- and Si-metasomatism. The resulting granitic rocks (leucometasomatites) appear as apophyse-like bodies within the gabbros and in the marginal parts of Qooshchi granite. Any further rise in the temperature could have caused melting of the metasomatized rocks and their subsequent recrystallization as pink Qooshchi granite
  • Javan G. Doloei, M. Mokhtari, D. Dyrelius Page 91
    A reflection seismogram can be represented as a convolution of a source wavelet with a set of reflection coefficients. In a standard model these coefficients are scalar and real impulses. For all plane waves, displacements are phase shifted in post-critical angles. In this case reflection coefficients can be complex and the scalar deconvolution does not remove distortions perfectly. To overcome this problem, it has been attempted to examine an analytical technique [i.e. Analytic Minimum Information Deconvolution (AMID)] that can remove distorted effects from seismograms. The necessary codes have been written for applying AMID technique to synthetic and real data. Using computer programs in seismology (Herrmann, 1996), the necessary synthetic seismograms are generated for a specific structural earth model. 10% random noise is added to the synthetic seismograms and the output of AMID filter is investigated for different source - receiver offsets. The results of this study shows the ability of AMID for elimination of random noise and Moho phase detection
  • P. Havvaie, A. Rajabtabar Page 123