@article { author = {}, title = {INTERFERENCE OF ALUMINIUM WITH CARBOHYDRATE METABOLISM IN MALE RATS: A MODEL STUDY OF DIALYSIS PATIENTS}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The effects of aluminium and aluminium-citrate on some serum parameters related to carbohydrate metabolism in male Wistar rats were investigated. Daily intraperitoneal administrations of 1 mg/kg body weight of aluminium or aluminiumcitrate (1: 1) for 50 days led to the elevation of serum insulin by 24 or 40 percent respectively, with the concomitant decrease in serum glucose concentrations by 17 and 14 percent. Serum insulin levels showed reduction by 36 and 29 percent following daily treatments of animals with 2 mg/kg aluminium or aluminium-citrate (1: 1). Serum glucose concentration elevated by 14 and 16 percent. Daily injections of 2mgkg aluminium without citrate led to the reduction of liver glycogen by 60 percent, whereas if aluminium (2mg/kg) is injected in complex with citric acid this effect is reversed. The effect of aluminium toxicity and the importance of citrate in this aspect is discussed}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31496.html}, eprint = {https://jsciences.ut.ac.ir/article_31496_b91e9a87dca2c7deb04b851ae5eb4aae.pdf} } @article { author = {}, title = {EFFECTS OF ENVIRONMENTAL pH ON THE PRODUCTION OF HEMATOPOIETIC GROWTH FACTORS}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {Cellular and tissue activities highly depend on environmental pH. Murine lung tissue, when cultured properly in-vitro, is a potent producer of hematopoietic growth factors. We have studied the effect of pH on the production of hematopoietic growth factors and protein synthesis by the murine lung in-vitro. Various concentrations of NaHC03 were used to adjust the pH of the culture medium under constant CO, partial pressure. The results indicated that hematopoietic growth factor production and protein synthesis by the lung were pH dependent. This dependency was not a result of variations in cation (N concentration in the culture medium because N reconstituted samples showed the same pattern of dependency on pH as did the unreconstituted samples. Maximum rate of protein synthesis by the lung was at pH 7. 6. However, the maximum rate of specific production of hematopoietic growth factors was observed at pH 8}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31497.html}, eprint = {https://jsciences.ut.ac.ir/article_31497_13ac6c3b1e43c4b47594dde6a25c0162.pdf} } @article { author = {}, title = {COMPARATIVE STRUCTURAL STABILITY OF HISTONES BY INTERACTION OF SODIUM NDODECYL SULPHATE}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The interaction of sodium n-dodecyl sulphate (SDS) with histones in phosphate buffer pH 6.4 has been studied spectroscopically and by equilibrium dialysis. The enthalpies of interaction and the spectroscopic data suggest different structural stability for histones-SDS interaction. The linear relation between enthaly and absorbtion was determined by the equation of m= , where m is the stability coefficient of histones-SDS interaction indicating the relationship of the structural stability of histones-SDS complexes.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31498.html}, eprint = {https://jsciences.ut.ac.ir/article_31498_f9287080f8d657eb68e06727ac5e7cf9.pdf} } @article { author = {}, title = {ELECTROCHEMICAL BEHAVIOR OF 1 - HYDROXYPYRIDINE 2-THIONE AND ITS VANADIUM COMPLEX}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {Electrochemical behavior of I-hydroxypyridine-2-thione and its vanadium complex is studied using polarographic techniques. Polarograms of ligand and that of the complex is shown with diffusion characteristics of the waves. Cyclic voltagram of thione is investigated which shows that a reversible oxidation reduction of one electron process is taking place. PKa of the thione is found to be in close agreement with the previous findings}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31499.html}, eprint = {https://jsciences.ut.ac.ir/article_31499_8b8a226eda922bf825092dc364945a2a.pdf} } @article { author = {}, title = {NUCLEAR MAGNETIC RESONANCE STUDY OF THE STRUCTURE OF GLYOXALDIHYDRAZONE}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {Study of the nuclear magnetic resonance spectra of glyoxaldihydrazone in dimethylsulfoxide and deuterochlorofonn leads to the conclusion that this compound exists predominantly in non-chelate structure}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31500.html}, eprint = {https://jsciences.ut.ac.ir/article_31500_44af92fa58575687a223d0e90a39abf0.pdf} } @article { author = {}, title = {SHIRAZOLIDE' AND 14 a-0 DIHYDROSHIRAZOLIDE TW 0 NEW ELEMANOLIDES FROM JURINEA LEPTOLOBA}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The less polar fractions of the extract of the aerial parts of Jurinea leptoloba afforded two new elemanolides. The structures were elucidated by high field NMR techniques}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31501.html}, eprint = {https://jsciences.ut.ac.ir/article_31501_b77de67cbd167b9949b01d85f2b79405.pdf} } @article { author = {}, title = {STRUCTURAL ANALYSIS OF CYCLOSPORIN-A BY RAMAN TECHNIQUE}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The Raman spectrum of cyclosporin-A has been recorded in the solid phase. The conformation of the molecule has been discussed on the basis of Raman data. It has been concluded that in agreement with X-ray data, cyclosporin-A molecule has an antiparallel P- pleated sheet conformation. It may have some reverse P- turn structure in what has been assigned to a random coil conformation.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31502.html}, eprint = {https://jsciences.ut.ac.ir/article_31502_65aa77e695d127d7fd86bf479f83fd01.pdf} } @article { author = {}, title = {Additions and Corrections}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31503.html}, eprint = {https://jsciences.ut.ac.ir/article_31503_19df4159dd7a414f97de4b4d925bcf7d.pdf} } @article { author = {}, title = {CLINOPYROXENE COMPOSITION AND GENESIS OF BASALTS FROM COLOURED SERIES AND EXOTIC BLOCKS IN THE NEYRIZ AREA (SOUTHERN IRAN): A COMPARISON WITH HAYBI COMPLEX OF OMAN}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The pyroxene composition of basaltic rocks from the Coloured Series and Exotic blocks in the Neyriz area are discussed. Comparison has been made with equivalent rocks from Oman. The clinopyroxene compositions are in cognation with trace and rare-earth element analyses which definately confirm the occurrence of three different trends in basic lavas: I-Depleted tholeiite, 2-Transitional basalt, 3-Alkali basalt. The alkali basalts are considered to be generated by the same processes that produce tholeiitic liquids but are thought to have had a different fractionation history}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31504.html}, eprint = {https://jsciences.ut.ac.ir/article_31504_3d2f7040fda1ac648f0fee1266a887da.pdf} } @article { author = {}, title = {ON THE CONTINUITY OF PROJECTIONS AND A GENERALIZED GRAM-SCHMIDT PROCESS}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {Let ? be an open connected subset of the complex plane C and let T be a bounded linear operator on a Hilbert space H. For ? in ? let e the orthogonal projection onto the null-space of T-?I . We discuss the necessary and sufficient conditions for the map ?? to b e continuous on ?. A generalized Gram- Schmidt process is also given.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31505.html}, eprint = {https://jsciences.ut.ac.ir/article_31505_e16792921bfa10a2912b21ff46ad7fec.pdf} } @article { author = {}, title = {ALGEBRAIC INDEPENDENCE OF CERTAIN FORMAL POWER SERIES (I)}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {We give a proof of the generalisation of Mendes-France and Van der Poorten's recent result over an arbitrary field of positive characteristic and then by extending a result of Carlitz, we shall introduce a class of algebraically independent series.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31506.html}, eprint = {https://jsciences.ut.ac.ir/article_31506_68777cb62d6604ef8e1a93d636151de7.pdf} } @article { author = {}, title = {ANALYSIS OF SOME MAGNETIC PROPERTIES OF DILUTED MAGNETIC SEMICONDUCTORS}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The susceptibility and specific heat experimental results of the diluted magnetic semiconductors (DMS) are incorporated in a model based on short-range as well as long-range interaction in a random may of magnetic ions. The so-called nearestneighbor pair approximation (NNPA) is applied. It appears that the calculated values of zero field specific heat and Curie-Weiss temperature based on the model calculation are in good agreement with experimental results}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31507.html}, eprint = {https://jsciences.ut.ac.ir/article_31507_9f59bc093e170a182258cdf41e772ef8.pdf} } @article { author = {}, title = {EMISSION-LINE OBJECTS FROM A PRELIMINARY UKST OBJECTIVE PRISM SURVEY}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {A visual search has been made of four fields using United Kingdom 1.2m Schmidt Objective Prism plates with a reciprocal dispersion of 1 180 A/mm at HP. Such plate material is ideally suited to searches for emission-line galaxies. We present a catalogue of 53 emission-line objects, which comprises 45 galaxies, where individual HI1 regions are resolved in 16 bright galaxies; 8 are emission line stellar objects, including one low and one high redshift quasar. One field has a surface density of emission-line galaxies a factor of four higher than any of the other three fields, but the same density of galaxies with resolved HI1 regions.}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31508.html}, eprint = {https://jsciences.ut.ac.ir/article_31508_cf14a409aecec09c60c92deecf10de22.pdf} } @article { author = {}, title = {THE DENSITY PROFILES OF A LENNARD -JONES FLUID CONFINED TO A SLIT}, journal = {Journal of Sciences, Islamic Republic of Iran}, volume = {2}, number = {1}, pages = {-}, year = {1991}, publisher = {University of Tehran}, issn = {1016-1104}, eissn = {2345-6914}, doi = {}, abstract = {The structure of fluids confined by planar walls is studied using density functional theory. The density functional used is a generalized form of the hypernetted chain (HNC) functional which contains a term third order in the density. This term is chosen to ensure that the modified density functional gives the correct bulk pressure. The proposed density functional applied to a Lennard-Jones fluid confined to a slit for temperatures below the critical point. The agreement between the results of the density profiles obtained by the theory and computer simulation are good}, keywords = {}, url = {https://jsciences.ut.ac.ir/article_31509.html}, eprint = {https://jsciences.ut.ac.ir/article_31509_3e33cf1d1214ec5b6c304719ad854ac0.pdf} }