University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 FOLDING OF THE INTERACTION OF HISTONE HI WITH SODIUM N-DODECYL SULPHATE - 31382 EN Journal Article The effects of sodium n-dodecyl sulphate (SDS) on the structure of histone HI has been studied by a combination of e:quilibrium dialysis, U.V. spectroscopy ; polyacrylamide gel electrophoresis, protein titration and viscometery techniques using, 2.5 mM phosphate buffer, pH 6.4. The interaction of H, and SDS in contrast tomanyothel-protein-SDS interactions is organized between V 40 to 70. Above V=40 there is an exothermic contribution from HI folding characterized by minima in the enthalpy curve at about 65 Kj mol:' This subject has been confirmed by spectroscopy, electrophoresis , titrametery and viscometery techniques https://jsciences.ut.ac.ir/article_31382_608b78a38cd26383321b54a3b02f68db.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 PREPARATION AND APPLICATIONS OF FLUORESCENT POLYGLUTARALDEHYDE IMMUNOMICROSPHERES - 31383 EN Journal Article Aqueous glutaraldehyde has been polymerized under alkaline conditions in the presence of a surfactant to yield microspheres of varied diameters. Microbeads of a nominal 300 nm diameter, made fluorescent via fluoresceinisothiocyanate, were used as a carrier of rabbit anti-human red blood cell antibodies. Specific labeling of the human red blood cells as well as diagnostic use of these fluorescent immunomicrospheresin detection of brucella antibody or antigen has been clearly demonstrated. https://jsciences.ut.ac.ir/article_31383_687b8dedbbf281200b402ba6fe58232d.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 FIRST CASE REPORT OF WHITE SUPERFICIAL ONYCHOMYCOSIS DUE TO FUSARIUM OXYSPORUM IN IRAN - 31384 EN Journal Article This paper presents for the first time the isolation of Fusarium oxysporum from the toenails of a man from Tehran. The fungus was demonstrated in KOH mounts and was isolated repeatedly from his nail scrapings over a 2 month period. Published reviews on onychomycosis in Iran have not revealed any cases of white superficial onychomycosis due to Fusarium oxysporum to date https://jsciences.ut.ac.ir/article_31384_9189e075289f180149ff1107d6d48f78.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 ATTEMPTED PREPARATION OF N-SUBSTITUTED DIPHENYLCYCLOPROPENEIMINE N-OXIDE - 31385 EN Journal Article The reaction of diphenylcyclopropenone with several N-substituted hydroxylamine and primary amines are investigated. Most of these reactions led to ring opened or ring enlarged products, instead of the desired N-Oxide or imine. The reaction of cyclopropeneimine with peracid-another possible route to N-substituted cyclopropeneimine N-Oxide is studied. Most of the unexpected products are identified and herein reported https://jsciences.ut.ac.ir/article_31385_ef5fa3e7b0c6b2383740f768ed209602.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 PHOTOISOMERIZATION OF 1-VINYL-7,7- DIMETHYL BICYCLO [2.2.1] HEPTA-ZONE - 31386 EN Journal Article The acetone sensitized photolysis of the title compound gave 2-(2- oxopropy1)-9,9- dimethyl bicyclo [3.3.l]nona-3-one. A bridgehead cyclopropane intermediate was then suggested for the formation of the photoproduct https://jsciences.ut.ac.ir/article_31386_4e6bdf8e5aed24d7a26d7318e0c87417.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 ATTEMPTED SYNTHESIS OF QUINONEMETHINE DERIVATIVE OF NOCARDICIN A ANALOGUES - 31387 EN Journal Article The synthesis of some 13-lactams is described. 'The electronic activation of monocyclic B-lactams provided by a quinonemethine function was found to instabilize the 13-lactam ring toward nucleophilic: attack by water https://jsciences.ut.ac.ir/article_31387_b51dd4eccb544a5c4979465f4d27e1e3.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 NITROIMIDAZOLES VII [I]. SYNTHESES, ANTIBACTERIAL AND ANTIFUNGAL ACT I V I T I E S OF 4 - S U B S T I T U T E D - 2 - TWIAZOLYLHYDRAZONES - 31388 EN Journal Article Reaction of readily available 2-formyl -1-methyl-5-nitroimidazole (1) with 4-substituted-2-hydrazinothiazoles (2) afforded 2-formyl-l-methyl-5- nitroimidazole 4-substituted -2- thiazolylhydrazones (3). Reaction of thiochromitn-4-one (4) with thiosemicarbazide gave thiochroman-4- one thiosemicarbazone (5). Reaction of compound 5 with clc- haloaldehyde or ketones y ielded thiochroman--#-one 4-substituted-2-thiazolylhydrozones(6). The antibacterial and antifungal activities of compounds 3 and 6 against a number of microorganisms were determined https://jsciences.ut.ac.ir/article_31388_1f8ac4a305f85a4b617655db27206fe1.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 SELENIUM HETEROCYCLES XXXVIII [I]. SYNTHESIS AND ANTIMICROBIAL ACTIVITY OF 2-ARYLSELENAZOLES - 31389 EN Journal Article STRING FROM substituted selenobenzamides (2) a series of 2- arylselenazoles (3-7) were prepared. The antibacterial activity of compounds 3-7 against a number of microorganisms were determined. Some of these compounds showed significant antibacterial activity https://jsciences.ut.ac.ir/article_31389_edbd47c8e4cabdf0b4e1e7f1069a226b.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 HYDROGEN ADSORPTION ON SILVER CATHODES IN PERCHLORIC ACID SOLUTIONS - 31390 EN Journal Article In this paper studies of overvoltage and capacitance measurements at silver cathodes in aqueous perchloric acid at room temperature are described. Capacitances were deduced from open-circuit potential decay measurements. The increase of overvoltage and the growth of the measured capacitances in the course of electrolysis are attributed to a growing pseudocapacitance component. This is analysed in terms of an increasing coverage, ? ,of the cathode by adsorbed hydrogn atoms. The increase in surface coverage from the beginning up to several days of cathodisation ranged up to 2% of a monolayer for silver in 0.1 mol HC1 ,and up toO.9% of a monolayer in 1 mol 1-' HCIO,. The increase in overvoltage at constant current density and the increase in electrode capacitance at constant overvoltage with the logarithm of the cathodic charge (-Q) were linear up to Q values of about -60° C . This increase in overvoltage and pseudocapacitance might be attributed to the adsorption and absorption of hydrogen atoms by silver cathodes https://jsciences.ut.ac.ir/article_31390_452dee7ed3aac40e980602f275eec5e5.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 SALINE DEPOSITS AND ALKALINE MAGMAT1SM:A GENETIC MODEL - 31391 EN Journal Article The temporal-spatial coincidence of saline deposits with rifting and alkaline magmatism has now become a commonly accepted fact. The congruency of these three phenomena implies logically, their trilateral genetic interrelation. The conventional concept for the formation of saline deposits, i.e an "evaporation process" can not be properly applied to giant saline deposits. The proposed "Volcanogenic hlodel" offers a genetic explanation for problems encountered. The role of alkaline and calc-alkaline magmatism in producing saline and sulfate deposits and the application of the proposed model in each case is discussed. The term "saturites" is proposed instead of "evaporites". https://jsciences.ut.ac.ir/article_31391_4b997c95a3cd22f4f5a45903bc4f319a.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 M-IDEAL STRUCTURE IN UNIFORM ALGEBRAS - 31392 EN Journal Article It is proved that if A is aregular uniform algebra on a compact Hausdorff space X in which every closed ideal is an M-ideal, then A = C(X). https://jsciences.ut.ac.ir/article_31392_b1a535724274b293f9623a791919c16e.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 SEMIGROUP ACTIONS , WEAK ALMOST PERIODICITY, AND INVARIANT MEANS - 31393 EN Journal Article Let S be a topological semigroup acting on a topological space X. We develop the theory of (weakly) almost periodic functions on X, with respect to S, and form the (weakly) almost periodic compactifications of X and S, with respect to each other. We then consider the notion of an action of Son a Banach space, and on its dual, and after defining S-invariant means for such a space, we give a result concerning the existence of such means, and apply it to prove the existence of a G-invariant mean on the space of weakly almost periodic functions defined on a topological space on which a topological group G acts. https://jsciences.ut.ac.ir/article_31393_0c394f0bd80e37fa0d8873166e556457.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 AN ALGORITHM FOR FINDING THE EIGENPAIRS OF A SYMMETRIC MATRIX - 31394 EN Journal Article The purpose of this paper is to show that ideas and techniques of the homotopy continuation method can be used to find the complete set of eigenpairs of a symmetric matrix. The homotopy defined by Chow, Mallet- Paret and York [I] may be used to solve this problem with 2""-n curves diverging to infinity which for large n causes a great inefficiency. M. Chu 121 introduced a homotopy equation to solve this problem, In this method it is necessary to follow 2n curves to handle the problem. Our method is basedon a special homotopy system of equations which consists of exactly n distinct smooth curves and connects trivial soiution to desired eigenpairs. It is important that in our method we avoidfindingexplicitlythecoefficient of the characteristic equation, as all experienced practitioners are aware of the large error that may result from the use of the approximate coefficientsof the characteristic polynomial https://jsciences.ut.ac.ir/article_31394_0f4a21d571adbe663374dbe676987dbc.pdf

University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 1 2 1990 03 01 THE EMPIRICAL BAYES METHOD OF ANALYSIS OF A SERIES OF EXPERIMENTS - 31395 EN Journal Article The classical method of analysis of a series of experiments is somewhat involved in being conditional on various, occasionally unrealistic, assumptions such as homogeneity of variances of experimental error, lack of interactions of treatments and places,etc. In this work, we adopt a Bayesian view to account for such heterogeneities. Our appoach is illustrated by a real series of experiments regarding the effect of fertilizers on crops of sugarbeet in various places of Iran. Conjugate priors are considered for parameters of the model and posteriors are obtained. Using iniormation from different places, the unknown priors are estimated and the empirical Bayes procedure is employed https://jsciences.ut.ac.ir/article_31395_5f2397a240ce3565d4d3b82b0db2fc65.pdf