The aims Straws of this study is to investigate the resistance of different SCC mixtures to aggressive solutions.The investigation included the type of the cementitious materials (silica fume and high reactivity Attapulguite-HRA) and limestone powder (chalk powder and Al-gubra).The powder content of the mixes was kept constant, 500 kg/m3.The slump
A Historical Overview of English Language Teacher Preparation Programs in Iranian Private Language Institutes
Given the significant role of studying history in casting light on the past and present of events and providing future insight, the present study aimed to investigate the history of English teacher preparation programs offered in five famous private language institutes established in the second post-revolutionary decade (about thirty years ago) in
Strategy of ring-shaped aggregates in excitation energy transfer for removing disorder-induced shielding
Peripheral light harvesting complex (LH2), which is found in photosynthetic antenna systems of purple photosynthetic bacteria, has important functions in the photosynthetic process, such as harvesting sunlight and transferring its energy to the photosynthetic reaction center.The key component in excitation energy transfer (EET) between LH2s is B850