Publication Date: 2009
Explicator (1939926X)67(3)pp. 183-186
Eslami, A.,
Ketabi, S.,
Yadollahi, B.,
Mesdaghinia, A.,
Vaezi f., ,
Nabizadeh, R. Publication Date: 2009
Iranian Journal Of Public Health (22516085)38(2)pp. 18-26
Background: Methyl tert-butyl ether (MTBE) has been commercially used as an octane enhancer to replace tetraethyl lead in gasoline since 1979. The high mobility, water solubility, and resistance to natural attenuation associated with MTBE may result in contamination of ground and surface waters. In this investigation the degradation of aqueous MTBE at relatively high concentrations was studied by UV-vis/TiO2/O2 photocatalytic process. The effect of important operational parameters such as pH, oxygen flow, catalyst loading, and irradiation time were also studied. Methods: Concentration of MTBE and intermediates such as tert-butyl formate (TBF) and tert-butyl alcohol (TBA) were measured using a gas chromatograph equipped with flam ionization detector and combined with headspace sampler. Results: The time required for complete degradation increased from 15 to 150 min, when the initial concentration was increased from 10 to 500 mg/L. The first order rate constant for degradation of MTBE from the hydroxyl radical was estimated to be 0.266 to 0.033 min-1 as the concentration increased from 10 to 500 mg/L. Study on the overall mineralization monitored by total organic carbon (TOC) analysis showed that in the initial concentration of 100 mg/L MTBE, complete mineralization was obtained after 110 min under UV-vis/TiO2/O2 photocatalytic process. Conclusion: The data presented in this paper clearly indicate that UV/TiO2/O2 advanced oxidation process provides an efficient treatment alternative for the remediation of MTBE contaminated water.
Publication Date: 2010
Research in Contemporary World Literature/ Pazhuhesh-e Zabanha-ye Khareji (25884131)(56)pp. 181-196
Paradise Lost incorporates many references to the East. The Orient figures prominently in the vast scope - the "imaginative geography" - of the poem. This paper attempts a survey of what, following Edward Said, has been termed orientalist discourse in Milton's epic poem. It is argued that this discourse has to be considered in the context of Milton's essentially religious and anti-monarchical stance. Associating the Orient with evil and the Satanic regime Paradise Lost cannot be wrested from latent orientalism but it is shown that issues such as aesthetic considerations, a cosmic setting, drawing on the authority of history, classicism, an encyclopedic scope, an essential antimonarchism and above all a profound process of displacement whereby comments on contemporary issues are displaced onto the Orient all help compound the representations of the East in this text. The result is an ambiguous and multi-faceted orientalist discourse.
This paper describes the development process of FarsNet; a lexical ontology for the Persian language. FarsNet is designed to contain a Persian WordNet with about 10000 synsets in its first phase and grow to cover verbs' argument structures and their selectional restrictions in its second phase. In this paper we discuss the semi-automatic approach to create the first phase: the Persian WordNet. © Global Wordnet Conference, GWC 2010. All rights reserved.
