Entity

Time filter

Source Type

Bandar-e Bushehr, Iran

This research is aimed at predicting erosion and sedimentation in the Ghareh Aghach Basin in the central part of Iran using Erosion Potential Model (EPM) models incorporated into Geographic Information System (GIS) software. This basin has an area of about 8955 hectares. The region has a range of vegetation, geological, soil texture and land use types. The basin was subdivided into 5 sub-basins. Data required for this study were collected in part through published reports, whilst the remaining was derived by feld surveys. Necessary maps in EPM models were prepared in Autocad-2006 medium and were transported to IILWIS, after some revision. After constructing topologies for all polygons, we entered weightings for all layers within the Arc-View software. Combinations of all layers were managed thereafter. Coeffcient of each factor was determined, and erosion intensity coeffcient (Z) was calculated. Four layers for EPM model were combined to develop the fnal layer of erosion and sedimentation. The results of the EPM model for homogenous and uniform sampling units showed that 0.19% (16.7 ha) of the total watershed area were classifed as class I of erosion category with very low sedimentation and 15.1% (1352 ha) were classifed as class II of erosion category with low sedimentation and 41.3% (3699 ha) were classifed as class III of erosion category with medium sedimentation and 13.2% (1175 ha) were classifed as class IV of erosion category with high sedimentation and fnally 30.2% (2711 ha) were classifed at class V of erosion category with very high sedimentation, respectively. The result of comparing erosion and sediment values using an EPM model with measured values showed that no signifcant difference was observed between the estimated and measured values (P, 0.05). © the author(s), publisher and licensee Libertas Academica Ltd. Source


A regioselective method for the synthesis of (E)-3-[2-(arylmethylene)-1- (arylsulfonyl)hydrazino]-2-propenoates is described. The reaction takes place between arylsulfonyl hydrazones and alkyl propiolates in the presence of triphenylphosphine as the catalyst. © 2012 Elsevier Ltd. All rights reserved. Source


Khalili G.,Islamic Azad University at Bushehr
Molecular Diversity | Year: 2016

Abstract: Sulfenylchloride intermediates generated from the reaction of aryl thiols with N-chlorosuccinimide were trapped by 6-amino uracil derivatives to yield 6-amino-5-(arylthio)-pyrimidine-2,4(1H,3H)-dione compounds at room temperature. Graphical Abstract: [Figure not available: see fulltext.] © 2016 Springer International Publishing Switzerland Source


Stable derivatives of N-alkyl sulfonyl hydrazone were obtained in excellent yields from the reaction between electron-deficient acetylenic ester compounds and sulfonyl hydrazones in the presence of trialkylphosphites in dichloromethan at room temperature. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications® for the following free supplemental resource(s): Full experimental and spectral details.] © 2013 Copyright Taylor and Francis Group, LLC. Source


Khalili G.,Islamic Azad University at Bushehr
Journal of Sulfur Chemistry | Year: 2013

Protonation of the reactive intermediates produced in the reaction between sodium arylsulfinates and two equiv. of dialkyl acetylenedicarboxylates in DMF, by H2O lead to substituted (1E,3E)-1-(arylsulfonyl)-1,3-butadiene-1,2,3,4- tetracarboxylates in moderate yields. A regioselective method for the synthesis of alkyl (E)-3-(arylsulfonyl)-2-propenoates is described. These reactions provide a useful synthetic route to highly functionalized 1,3-butadienes and 2-propenoates. © 2013 Copyright Taylor and Francis Group, LLC. Source

Discover hidden collaborations