University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 A COMPARATIW STUDY ON THE BINDING OF HEXOKINASE TO THE OUTER MITOCHONDRIAL MEMBRANE AND A HYDROPHOBIC MATRIX - 31343 EN Journal Article https://jsciences.ut.ac.ir/article_31343_4ecca9950b8e48cca47014655c2c4789.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 LOCALIZATION OF REOVIRUS CELL ATTACHMENT PROTEIN ?l ON THE SURFACE OF THE REOVIRION USING IMMUNOFERRITIN ELECTRON MICROSCOPY - 31344 EN Journal Article Purified reovirus type 3 (strain Dearing) was treated with monoclonal anti-?l antibody conjugated to ferritin and examined in the electron microscope. Virion associated ferritin molecules corresponding to locations of the ?l protein were observed. Electron microsocpy of thin sections of these preparations revealed that ferritin conjugates were localized at the vertices of the viral icosahedron. Reovirus cores possessing spikes and protein ?1, prepared by partial chymotrypsin digestion of intact virions, were similarly treated and examined. Core-associated ferritin molecules were found to be localized at positions corresponding to the tips of the spikes. Such an association was not observed with the cores whose spikes had been removed by alkali treatment. These results provide unequivocal evidence that protein ol is present in icosahedrally-distributed locations, representing tips of reovirus core spikes, on the surface of reovirus particles https://jsciences.ut.ac.ir/article_31344_886551d6661c7e64f03ecdc16f7eae8b.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 SPECTROPHOTOMETRIC REACTION RATE METHOD FOR THE DETERMINATION OF SLWR BASED ON ITS CATALYTIC EFFEICT ON THE OXIDATION OF GLLOCYANW BY PER0XYDISULPTE - 31345 EN Journal Article A sensitive and selective procedure was developed for the spectrophotometric determination of silver by its catalytic effect on the oxidation of gallocyanine by peroxydisulphate in acidic media at 540 nm. Silver can be determined in the range of 0.001-0.500 µg/ml with a limit of detection of 0.0005 µg/ml, by a fixed-time method of 4.0 min from initiation of the reaction, The relative standard deviation for ten replicate determinations of 0.050 µg/ml of Ag(1) is 1.4%. This method was used for the determination of silver in real smples. with a limit of detection of 0.0005 µg/ml, by a fixed-time method of 4.0 min from initiation of the reaction, The relative standard deviation for ten replicate determinations of 0.050 µg/ml of Ag(I) is 1.4%. This method was used for the determination of silver in real samples https://jsciences.ut.ac.ir/article_31345_14c15aaec95f9b40f00007e6336d3e08.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 AN FT-IR SPECTROSCOPIC INVESTIGATION OF IONIC SOLVATION OF ALKALINE EARTH CATIONS WITH DIMETWYLSULFOXIDE IN ANHYDROUS ACETONITRILE - 31346 EN Journal Article The interaction between DMSO and alkaline earth perchlorates in anhydrous acetonitrile was investigated by FT-IR spectroscopy. A quantitative study was performed to determine the average number of bonded DMSO molecules using v (SO) and v (C-S) vibrations. Changes in coordination numbers were observed both with increasing atomic numbers and the solvent composition. None of the investigated systems shows any interaction with either perchlorate ions or acetonittile molecules. Apparent equilibrium constants were estimated from the average coordination numbers. https://jsciences.ut.ac.ir/article_31346_fa2b52148f1bfe3621b50ca9e3b3e5e2.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 SELECTIVE CYCLIZATION AND IS OMERIZATION OF 3-PROPARGYLTHIO- 1,2,4- BENZOTRIAZINE TO THIAZOLO [2,3-C] [1,2,4] BENZOTRIAZINE - 31347 EN Journal Article The method cited in the literature for synthesis of 1,2- dihydro 3- thioxo - 1,2,4- benzotriazine 1 was improved .1 was condensed with propargyl bromide to afford 3 - propargylthio – 1,2,4 -benzotriazine 5. Transformation of this compound to 9H-3- methylthiazolo [2,3-c] [1,2,4] benzotriazine ( 3, R = Me) was performed in the presence of Na O Me / MeOH . Orientation of this selective cyclization was ascertained by (N.O.E.) NMR experiment https://jsciences.ut.ac.ir/article_31347_fbdf42a1e05260c8a58057ed7e2eb77b.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 A NOVEL QUINONE DIMETHIDE FORMED BY AERIAL OXIDATION OF 1,2,3,4,5,6,7,8- OCTAHYDRO-9,lO-DIHYDROXY1,-5 ANTHRACENEDIONE - 31348 EN Journal Article During the development of a new regiospecific synthetic methodology for 1,5 dihydroxy- 9,lO-anthraquinone, it was observed that (anthrufin) preparative TLC of 1,2,3,4,5,6,7,8-octahydro-9,lO-dihyd roxy- 1,5-anthracenedione on silica gel produced a well-defined 1:l complex of the dione and an aerial oxidation product of it, the quinone dimethide 1,2,3,4,5,6,7- hexahydro-9,lO-dihydroxy-1 ,5-anthracenedione; both the complex and the quinone dimethide were characterised spectroscopically https://jsciences.ut.ac.ir/article_31348_133b848dc15d027a626100a490de2430.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 ALKALOIDS OF BORAGINACEAE II [I], PYRROLIZIDINE, ALKALOIDS OF HELIOTROPIUM E UROPAEUM L. POPULATION GARMSAR - 31349 EN Journal Article Helitropium europaeum L. population Garmsar was shown to contain three major alkaloids: heliotrine N-oxide (2), lasiocarpine (4) and lasiocarpine N-oxide (5); and four minor alkaloids: heliotrine (I), europine (3), acetyllasiocarpine (6) and a novel alkaloid acetyllasiocarpine N-oxide (7). https://jsciences.ut.ac.ir/article_31349_3954b5739e3e14683cd0280edb82109c.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 SECOND VIRIAL COEFFICIENTS OF NONSPHERICAL MOLECULES WITH INDIVIDUAL DAMPING OF HFDID 1 POTENTIAL - 31350 EN Journal Article The second virial coefficients are given as a spherical-core contribution plus a series of nonspherical perturbation terms. A revised analysis is given of the effect of long-range nonspherical terms in the intermolecular potential on the second virial coefficient given by a preferred HFDIDl spherical core treatment of the integration for small intermolecular distances. This effect is considered by damping functions https://jsciences.ut.ac.ir/article_31350_2d02a252e43e9717a88413651fdddf4c.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 BAYES PREDICTION INTERVALS FOR THE BURR TYPE XI1 DISTRIBUTION IN THE PRESENCE OF OUTLIERS - 31351 EN Journal Article Using a sample fiom Burr type XU distribution, Bayes prediction intervals are derived for the maximum and minimum of a future sample fromthe same distribution, but in the presence of a single outlier of the type 8,8. The prior of Q is assumed to be the gamma conjugate. A real example is given to illustrate the procedure. Also, the comparison between the values of the prediction bounds for different values of ? and different future sample sizes is given https://jsciences.ut.ac.ir/article_31351_0e45a87d6e065b04784891b6d20ceefb.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 QUASI-PERMUTATION REPRESENTATIONS OF SUZtTKI GROUP - 31352 EN Journal Article By a quasi-permutation matrix we mean a square matrix over the complex field C with non-negative integral trace. Thus every permutation matrix over C is a quasipermutation matrix. For a given finite group G, let p(G) denote the minimal degree of a faithful permutation representation of G (or of a faithful representation of G by permutation matrices), let q(G) denote the minimal degree of a faithful representation of G by quasi-permuation matrices over the rational field Q, and let c(G) be the minimal degree of a faithful representation of G by complex quasi-permuatation matrices. Let r(G) denote the minimal degree of a faithful rational valued character of G. In this paper we will calculate c(G), q(G), p(G) and r(G) where G= Sz(q) is the Suzuki group . Also we will show that lim . https://jsciences.ut.ac.ir/article_31352_92ea7d01cd7d6245f19a2da8aa6534b4.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 ALGEBRAIC NONLINEARITY IN VOLTERRA-HAMMERSTEIN EQUATIONS - 31353 EN Journal Article Here a posteriori error estimate for the numerical solution of nonlinear Voltena- Hammerstein equations is given. We present an error upper bound for nonlinear Voltena-Hammastein integral equations, in which the form of nonlinearity is algebraic and develop a posteriori error estimate for the recently proposed method of Brunner for these problems (the implicitly linear collocation method).We also generalize this upper bound for nonlinear Volterra integro-differential and Volterra- Hammerstein integral equations of mixed type . Finally, several numerical examples are gken to show effectiveness of these bounds https://jsciences.ut.ac.ir/article_31353_e17e41c81b11621c2e362b6bd2cd7bc9.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 STUDY OF NUCLEAR LEVEL DENSITY AND SPIN CUT-OFF FACTORS - 31354 EN Journal Article Nuclear level densities and spin cut-off factors have been deduced for nuclei in the mass region 24‹A‹63,from a microscopic theory, which includes nuclear pairing interaction. Single particle levels for both Seeger and Nilsson potentials were used in the calcdations. Level densities extracted from the theory are compared with their conesponding experimental values, It is found that the overall agreement between experimental level densities and the microscopic theory with pairing is very good. The calculational procedure to account for an odd particle system blocking, as well as the effect of such blocking, is also discussed https://jsciences.ut.ac.ir/article_31354_97652673df105b7ad2ba940585e53500.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 10 1 1999 03 01 OBSERVATION OF THE HARD DISRUPTION INSTABILITY IN THE IR-TI (IRAN-TOKAMAK 1) - 31355 EN Journal Article In this article, some diagnostic systems and the preliminary results of the IR-T1** (Iran-Tokamak 1) are presented. Different diagnostic methods, including an array of soft X-ray detectors, visible spectrometer, electron cyclotron emission detector and electromagnetic measurement systems have been used and the hard disruptive instability occurring in the IR-T1 plasma during an ohmic heating discharge, under a range of reproducible conditions for 3 q(a) 2, is studied. It is found that the disruption activity occurs when the value of the safety factor at the plasma edge becames less than q(a) 2.7. https://jsciences.ut.ac.ir/article_31355_105dce1d1aed88877f7b1097e978f99e.pdf