فهرست مطالب

Sciences, Islamic Republic of Iran - Volume:27 Issue: 3, Summer 2016

Journal of Sciences, Islamic Republic of Iran
Volume:27 Issue: 3, Summer 2016

  • تاریخ انتشار: 1395/03/27
  • تعداد عناوین: 8
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  • Sh. Fazeli, M. Sheidai, F. Farahani, Z. Noormohammadi Pages 205-215
    The cultivated apple (Malus domestica) is one of the most important fruit crops cultivated in different regions of the world including Iran. For production and breeding of high quality apple, the knowledge of genetic diversity of the cultivated apples is necessary. Therefore we studied genetic diversity of 25 genotypes by using ISSR molecular markers. In present study, ten ISSR primers produced 85% polymorphism. (AGC)5GG and (GA)9C primers produced the highest number of bands, while primers (GA)9A, (GA)9A and UBC 807 produced the lowest number. Some of the genotypes showed presence of specific bands. PCoA (principal co-ordinate analysis) plot of genotypes based on geographical origin (Netherland, France, Lebonan and Iran) grouped cultivars from different geographical regions together and intermixed. UPGMA (unweighted paired group method with arithmetic average) and NJ (Neighbor Joining) dendrograms produced 4 major clusters with few subclusters in each of them indicating intra-group genetic diversity. AMOVA (Analysis of molecular variance) test performed on molecular features of the genotypes present in the 4 clusters revealed significant difference among the clusters. This high value of within clusters genetic variation is in agreement with subclusters formed in each major cluster due to intra-population group variation. STRUCTURE plots of k = 2-7 were obtained and the best groupings was done by k =7. It indicated differences in allelic composition and frequency of the subclusters. The results showed presence of high level of genetic diversity in apple samples studied which can be used in planning further selection and hybridization of apple trees.
    Keywords: Genetic variation, ISSR, Malus domestica, polymorphism
  • A. Abbasi*, M. Gharib, M. Najafi Pages 217-221
    One-dimensional (1D) coordination polymer, [Zn(4,4´-bpy)(H2O)4](ADC).4H2O (1) (4,4´-bpy = 4,4´-bipyridine and H2ADC = acetylenedicarboxylic acid), and three-dimensional (3D) metal-organic framework (MOF), Zn(ADC)2.(HTEA)2(2) (HTEA = triethylamine) were prepared at room temperature. The compounds were characterized by single-crystal X-ray diffraction and powder X-ray diffraction (PXRD) analyses. The polymers were applied as precursors for the synthesis of ZnO nanocrystals via direct thermal decomposition. The prepared nanocrystals were characterized by PXRD, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). It was found that the nanocrystals of different morphologies such as rods and particles were formed using 1 and 2, respectively.
    Keywords: Nanocrystals of zinc oxide, Coordination polymer, Solid, state synthesis, Morphology
  • M. Masteri, Farahani*, R. Rahimpour Pages 223-230
    In this work, we report a new hybrid nanomaterial based on the immobilization of 4-formyl benzo-9-crown-3 ether (FB9C3) onto the mesopores of MCM-41. First, the mesoporous molecular sieve MCM-41 was covalently grafted with 3-aminopropyl triethoxysilane to give aminopropyl modified MCM-41 (AmpMCM-41). Reaction of this material with FB9C3 afforded the B9C3-AmpMCM-41 hybrid nanomaterial. The prepared B9C3-AmpMCM-41 was characterized with different physicochemical methods such as Fourier transform infrared spectroscopy, X-ray diffraction (XRD), scanning and transmission electron microscopy, thermogravimetric analysis (TGA-DTA), and BET nitrogen adsorption-desorption analysis. The XRD analysis revealed that textural properties of the support were preserved during the immobilization process. However, nitrogen adsorption-desorption analysis showed sequential reduction in surface area, pore volume, and pore size during the grafting experiments. Elemental analysis showed the presence of 0.11 mmol FB9C3 per gram of the hybrid nanomaterial.
    Keywords: Mesoporous, MCM, 41, Hybrid nanomaterial, Benzo, 9, crown, 3 ether, Immobilization
  • S. Eskandari*, E. Tarizade, F. Teymouri Pages 231-236
    Mesoporous MCM-41 silicas anchored with sulfonic acid (–SO3H) groups (denoted MSN-SA) via postsynthesis modification are very effective for the Beckman rearrangement. A simple and convenient procedure for conversion of a variety oximes to their corresponding amides and lactams has been developed. The reaction was carried out in the presence of MSN-SA as the catalyst. The best results for conversion of oximes to amides and lactams were obtained in the presence of MSN-SA and solvent free condition at 110 ºC. Excellent yields were obtained from oximes with electron-donating and electron-withdrawing groups. The system also worked well with polynuclear aromatic, heterocyclic and aliphatic oximes.
    Keywords: Oxime, MCM, 4, Sulfonic acid, Beckman rearrangement
  • I. Maghfouri Moghaddam*, P. Shams, M. Parvaneh Nejad Shirazi Pages 237-252
    The Albian- Cenomanian (Kazhdumi Formation) sediments from northeast of Shiraz, Zagros Basin, represents a carbonate sedimentary succession and contain diverse gastropods and bivalves. Detailed studies on 80 samples of invertebrate macrofauna on two stratigraphic sections led to recognized 2 species and 5 genera of gastropods and 7 species and 13 genera of bivalves assemblages. The abscence of large gastropods and bivalves fauna and abundance of suspension-feeders indicated instability of the substrate and a medium enrgy condition. From a palaeobiogeographic point of view, the fauna from the Kazhdumi Formation were similar to the Central Iran and North Jordan and Wadi Qena (Egypt).
    Keywords: Gastropoda, Bivalve, Kazhdumi Formation, Fars Zone, Zagros Basin
  • G. Mirzababaei, J. Shahabpour, A. Zarasvandi, S. M. Hayatolgheyb Pages 253-267
    Structural analysis of remotely sensed data provides a method of assessing the structural significance of regional metallogenesis in the Dehaj area as the northwestern part of the Kerman porphyry Cu belt. This belt is consisted of dominant Eocene volcanics and the Dehaj type subvolcanic intrusives. In the study area, geologically, Cu-mineralization is hosted by the Kuh-e-Panj type subvolcanic intrusives. Photogeological analysis of the Landsat imagery reveals a pattern of mainly NW-SE oriented linear structures which were apparently generated in response to crustal thickening and lineament reactivations during the generation of a huge stratovolcanoes. A comparison of lineament map generated from Landsat ETM image indicates that the locations of some of the deposits, magmatic and hydrothermal centers are at/or close to the intersections of linear structures. This study deals also with the irrefutable genetic links between some small circular features and copper mineralization that has not been previously examined. It is proposed that the circular features are superficial expressions of intruded stocks or bodies in subvolcanic levels without remarkable volcanic equivalents. Of particular matter in this framework is the possible genetic/age relationship between the linear structures and the circular features. These small circular features are thought, in some cases, as having been formed due to development of the local extensional points near the intersection of the linear structures in a regional, tectonically, compressive environment. Regionally, plotting the residual anomaly and bouguer anomaly maps of the region provides, geophysically, a lucid explanation as to how the small circles came into existence.
    Keywords: Structural analysis, Cu mineralization, Linear structures, Small circular features, Bouguer anomaly
  • A New Bootstrap Based Algorithm for Hotelling's T2 Multivariate Control Chart
    A. Mostajeran, N. Iranpanah*, R. Noorossana Pages 269-278
    Normality is a common assumption for many quality control charts. One should expect misleading results once this assumption is violated. In order to avoid this pitfall, we need to evaluate this assumption prior to the use of control charts which require normality assumption. However, in certain cases either this assumption is overlooked or it is hard to check. Robust control charts and bootstrap control charts are two remedial measures that we could use to overcome this issue. In this paper, a new bootstrap algorithm is proposed to construct Hotelling’s T2 control chart. The performance of proposed chart is evaluated through a simulation study. Our results are compared to the traditional Hotelling’s T2 control chart results and the bootstrap results reported by Phaladiganon et al. [13] using in-control and out-of-control average run lengths denoted by ARL0 and ARL1, respectively. The latter case is obtained when the process mean is subject to sustained shifts. Numerical results indicate that the proposed algorithm performs better than the above mentioned methods. The new bootstrap algorithm is also applied to a real data set.
    Keywords: Bootstrap, Hotelling's T2, Multivariate control charts, Average run length, Monte Carlo simulation
  • M. Tayyebi, A. Heydari Pages 279-285
    Providing an appropriate definition of a horizontal subbundle of a Lie algebroid will lead to construction of a better framework on Lie algebriods. In this paper, we give a new and natural definition of a horizontal subbundle using the prolongation of a Lie algebroid and then we show that any linear connection on a Lie algebroid generates a horizontal subbundle and vice versa. The same correspondence will be proved for any covariant derivative on a Lie algebroid.
    Keywords: Lie algebroid, Horizontal subbundle, Double Lie algebroid