fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

nowadays,tourism industry considered as one of the main sources of income of a country.unfortunately and despite of owning plenty of cultural historical and natural attractions, iran has not reached to a proper position in this field. besides, the historical cities of a country are considered as the income resource and national wealth of it. qazvin with a rich cultural precedent, have suitable ...

  Molla Sadra has viewed revelation, vahy, to be the connection and unity of the Prophet’s spirit with intellectual and fantastic world. To establish such a state, one should cut off any attention from low desires and let wisdom govern over his worldly tendencies. In such a state intellectual and fantastic faculties find appropriate opportunity to attain their own perfections, namely to observ...

run-out-table (rot) is located between last finishing stand and down coiler in a hot strip mill. as the hot steel strip passes from rot, water jets impact on it from top and bottom and strip temperature decreases approximately from 800-950 °c to 500-750°c. the temperature history that strip experience while passing through rot affects significantly the metallurgical and mechanical properties, s...

in the new age, in regard to human success in education in the globalizing world, one can consider english proficiency and individual differences as two important issues. in efl settings, reading skill plays an important role in education. it seems that using multiple intelligences theory in efl classes which values individual differences by tapping different intelligences, can be rewarding. as...

In the middle ages, the Crusaders possessed some parts of the western territory of the Islamic world and continued their establishment until the 6th and 7th centuries. Considering religious teachings regardless of ethnic, political, and religious diversity could have played a strategic role in how Muslims faced the crusaders. The main question of the research is how Islamic unity doctrines in t...