@article { author = {POPOVA, L. and TUAN, T.}, title = {NITRIC OXIDE IN PLANTS: PROPERTIES, BIOSYNTHESIS AND PHYSIOLOGICAL FUNCTIONS}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {173-183}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2186}, abstract = {Nitric oxide (NO) is an important signalling molecule with diverse physiological functions inplants. In the last years, many advances have been obtained regarding NO synthesis and its physiologicaleffects in plants. It was found to play a crucial role in plant growth and development, starting fromgermination to flowering, ripening of fruit and senescence of organs, respiratory metabolism, as well as plantresponse to abiotic and biotic stressors. However, the molecular mechanisms underlying its effects remainpoorly understood. This review discusses some aspects related to NO in plants, such as chemical properties,synthesis pathways, antioxidant action, physiological and biochemical changes that occur in plants undernormal conditions and the possible functions of NO under changing environmental conditions. The interactionof NO with plant hormones, and cross-talk with salicylic acid are also discussed. The elucidation of suchaspects represents a challenge to future studies.}, keywords = {Nitric oxide,structure,Synthesis,physiological functions,Salicylic acid}, url = {https://ijsts.shirazu.ac.ir/article_2186.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2186_437a09d0a275b53a37813592c98555bc.pdf} } @article { author = {PAKARZADEH, H. and ZAKERY, A.}, title = {A NEW NUMERICAL MODEL FOR THE PUMP-TO-SIGNAL RIN TRANSFER IN SINGLE-PUMP FIBER OPTICAL PARAMETRIC AMPLIFIERS}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {185-195}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2187}, abstract = {Using a new numerical model, the pump-to-signal relative intensity noise (RIN) transfer in singlepumpfiber optical parametric amplifiers for low modulation frequencies is investigated. The model includesfiber loss, pump depletion, as well as the gain saturation, and therefore, it can describe the practicalcircumstances associated with various applications of fiber optical parametric amplifiers. The nonlineardynamics of the RIN transfer for different pump and signal powers is studied. The impact of the input pumpand signal powers and signal wavelength on the RIN transfer is also investigated. Finally, the model iscompared to the available experimental data and a very good agreement is obtained}, keywords = {Parametric amplification,relative intensity noise (RIN),optical fiber}, url = {https://ijsts.shirazu.ac.ir/article_2187.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2187_bee06665521c8b7188e1c816d8d21eae.pdf} } @article { author = {ERSOY, S. and TOSUN, M.}, title = {SECTIONAL CURVATURE OF TIMELIKE RULED SURFACE PART I: LORENTZIAN BELTRAMI-EULER FORMULA}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {197-214}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2188}, abstract = {In this paper, the Lorentzian version of Beltrami-Euler formula is investigated in 1n . Initially,the first fundamental form and the metric coefficients of generalized timelike ruled surface are calculated and by the help of the Christoffel Symbols, Riemann-Christoffel curvatures are obtained. Thus, the curvatures of spacelike and timelike tangential sections of generalized timelike ruled surface with timelike generating space and central ruled surface are found to be related to the determinant of the first fundamental form of the surface. In addition to this, the relation between the sectional curvature and the distribution parameter of this ruled surface is obtained. Finally, paying attention to the spacelike and timelike central ruled surface of the generalized timelike ruled surface one by one, four different types of Lorentzian Beltrami-Euler formulas are constituted for generalized timelike ruled surface with timelike generating space}, keywords = {Sectional curvature,Ruled Surface,Beltrami-Euler formula}, url = {https://ijsts.shirazu.ac.ir/article_2188.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2188_b9f2ed20fd1ff376aad4de335b336587.pdf} } @article { author = {HOSSEINI-SARVARI, M. and TAVAKOLIAN, M. and ASHENAGAR, S.}, title = {NITRATION OF AROMATIC COMPOUNDS USING ALUMINA SULFURIC ACID (ASA) AS A NOVEL HETEROGENEOUS SYSTEM AND Mg (NO3)2.6H2O AS NITRATING AGENT IN WATER}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {215-225}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2189}, abstract = {A novel and safe method for nitration of phenols, anilines and other aromatic compounds has beenfound to be feasible with alumina sulfuric acid (ASA) as catalyst and Mg (NO3)2.6H2O as nitrating agent inneat water as solvent. The use of water makes this method compatible with the green chemistry approach}, keywords = {Alumina sulfuric acid,nitration,Mg (NO3)2.6H2O,water,heterogeneous}, url = {https://ijsts.shirazu.ac.ir/article_2189.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2189_2cb80613fe22a36521074cfe87795683.pdf} } @article { author = {GHARIB, A. G. and GHARIB, M. G.}, title = {INTAKES OF RADIOLOGICALLY IMPORTANT TRACE AND MINOR ELEMENTS FROM IRANIAN DAILY DIETS}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {227-236}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2190}, abstract = {Cesium content and some other more radiologically important mineral elements were measuredby nuclear and non-nuclear analytical methods in Iranian daily diets.This study was extended to a few moresimilar functioning elements such as Sr, Rb, I, K, Mg and Ca as well. Though the 137Cs and otherradionuclieds were not measured in these diets under planned regular investigation in this work, but incomparison with some other backgrounds, the contribution and the impact/effective amount of 137Cs in thedaily diet/total mixed diet may be estimated either by its own part concentrations or by the amount of intakes per person per day, if any of those, is in sufficient quantity of normal range. Nevertheless, the protective role of these minerals in human organs is the main issue of this assessment. The amount of 137Cs and other radionulides in the foodstuff depends upon direct contamination/exposure or via the mineral and organic content of the radionuclides in the soil and environment to be transferred to nutritive species. This effect is also considered.}, keywords = {Iranian,radiological protection,radionuclides,daily dietary}, url = {https://ijsts.shirazu.ac.ir/article_2190.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2190_6cc7925e35a902d19d315b6e08e3c61b.pdf} } @article { author = {AHMADI LEDARI, A. and HORMOZI, M.}, title = {BV AS A NON SEPARABLE DUAL SPACE}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {237-244}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2191}, abstract = {Let C be a field of subsets of a set I. Also, let     1 i i be a non-decreasing positivesequence of real numbers such that 1, 1 0 1   i  and    11 i i . In this paper we prove thatBV of all the games of -bounded variation on C is a non-separable and norm dual Banach space of thespace of simple games on C . We use this fact to establish the existence of a linear mapping T from BVonto F A (finitely additive set functions) which is positive, efficient and satisfies a weak form of symmetry,namely invariance under a semigroup of automorphisms of I,C.}, keywords = {Set functions,duality,compactness,non separable}, url = {https://ijsts.shirazu.ac.ir/article_2191.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2191_d4fbec9c1005ac480ca504bf5a911f3f.pdf} } @article { author = {ARABZADEH, N. and EMADIAN, S. F.}, title = {EFFECT OF WATER (DROUGHT) STRESS ON WATER RELATIONS OF HALOXYLON APHYLLUM AND H. PERSICUM*}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {245-255}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2192}, abstract = {Root and shoot osmotic and elastic properties of two species of Haloxylon aphyllum and H.persicum in response to water stress were studied. The main goal of the study was to determine if the tissuesof two species utilize osmotic adjustment and/or enhance their elastic property during prolonged water stresscondition. The results showed that although tissue elasticity of both species of haloxylon was enhanced due toapplication of repeated water stress cycles, this condition also increased the tissue osmotic potential.Therefore, this study concluded that haloxylon species utilize enhancement of elasticity rather than osmoticadjustment to maintain positive turgor and withstand drought}, keywords = {Haloxylon,water relations,water stress,drought resistance,osmotic and elastic properties}, url = {https://ijsts.shirazu.ac.ir/article_2192.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2192_9e605cb26a516ae84419d0f76a4010c9.pdf} } @article { author = {RAHMANI, Z. and VAZIRI-MOGHADDAM, H.}, title = {FACIES DISTRIBUTION AND PALAEOECOLOGY OF THE GURI MEMBER OF THE MISHAN FORMATION, IN LAR AREA, FARS PROVINCE, SW IRAN*}, journal = {Iranian Journal of Science}, volume = {34}, number = {3}, pages = {257-266}, year = {2010}, publisher = {Springer}, issn = {2731-8095}, eissn = {2731-8109}, doi = {10.22099/ijsts.2010.2193}, abstract = {This research is focused on facies distribution, palaeoecology and palaeoenvironment of the GuriMember of the Mishan Formation in Kuh-e Shur and Kuh-e Kurdeh sections at the Lar area, Fars province.The Guri Member is composed of limestone, marly limestone and marl and the thickness at Kuh-e Shur andKuh-e Kurdeh is about 72 and 110 meters, respectively. Based on petrographical studies of 120 thin sections, 8 microfacies have been identified that are deposited in open shelf environment (inner and middle shelf). Palaeolatitudinal reconstructions based on skeletal grains suggests that carbonate sedimentation oGuri Member took place in tropical waters under oligotrophic conditions, a typical environment for photozoan assemblages. These biotic assemblages of the Guri Member belong to foralgal association and may be broadly defined as comprising heterozoan assemblages. An important factor controlling the spread of heterozoan assemblages during the Early Miocene in the study areas seem to be related to the palaeoecology and evolution of zooxanthellate corals.}, keywords = {Guri member,Mishan formation,microfacies,palaeoecology,benthic foraminifera,Kuh-e Shur,Kuh-e Kurdeh}, url = {https://ijsts.shirazu.ac.ir/article_2193.html}, eprint = {https://ijsts.shirazu.ac.ir/article_2193_dcbdb6c2321d02ad59a2576efdf8922f.pdf} }