in this thesis, a new optically active poly(amide-imide) (pai) was synthesized by the indirect polycondensation reaction of the l-phenylalanine based diacid chloride and 4,4?-diaminodiphenylether in the presence of triethylamine in n-methyl-2-pyrrolidone. the formation of pai was confirmed by ftir, 1h nmr and elemental analysis. in next step, the surface of titanium dioxide (tio2) nanoparticles...

this study sought to examine the effect of cooperative game on iranian students achievements in english alphabet learning. cooperative games are games, in which players or teams work together towards a common goal without defeating someone. the methodology used in this study was experimental. the population of the study was 60 female students from the grade one in secondary school in tabriz, ir...

determination of uranium in natural water and complex solutions using ion exchange chromatography: a combined procedure using ion exchange chromatography and uv-vis spectrophotometry techniques has been developed to measure uranum in natural water and complex solutions. after conditicing , one hundred milli liters of sample solutions have been passed through an ion exchange column,pachked with ...

Belief in eternality of the source of moral values has a great influence on people’s way of thinking and their lifestyles. This research analytically and explanatorily compares the views of two leading thinkers in the Islamic and Western worlds: Plato and Ibn ‘Arabī. While according to Plato’s theory of “Ideas”, all phenomena including moral values such as brevity and justice have examples, ide...

Tasnīm interpretation of Qurān, written by ‘Abd al-Allāh Javādi Ᾱmoli, is not specifically a mystical interpretation, but his numerous quotes of Sufis, especially of Mohyi al-din Ibn ‘Arabi, is striking. The exegete with deep knowledge of the content of Ibn ‘Arabi's books, believes that the foundations of Ibn ‘Arabī's school correspond with Shi’ite school fundamentals. However he is not only th...

this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...

abstract biometric access control is an automatic system that intelligently provides the access of special actions to predefined individuals. it may use one or more unique features of humans, like fingerprint, iris, gesture, 2d and 3d face images. 2d face image is one of the important features with useful and reliable information for recognition of individuals and systems based on this ...