The main objective of this study is to examine the existence and nature relationship between exchange rate foreign reserves. To avoid influencing market expectations, intervention program should indicate in advance nature, frequency, size central bank's transactions. Thus, sense, it essential determine interventions made from for official reserve. Following realization study, was highlighted co...

the major foible of dental ceramics is their brittle nature. therefore, the producers of these materials have focused on the “strength” issue. a method of increasing strength is ion exchange on porcelain surface which leads to formation of a compressive crust that opposing forces should overcome before developing a crack. in current study, ion exchange in two types of porcelain, ceramco ii whic...

Background: In this study we have prepared the IgA solution from normal human plasma using plasma fractionation and ion exchange chromatography. Materials and Methods: Using fractionation of plasma with cold ethanol (starting with 8% ethanol), fraction III was prepared as a suitable source for IgA preparation. Then it was treated with caprylic acid for separation of impurities. For enrichm...

one of the most important policies concerning the adjustment of foreign trade is to allocate foreign currency by establishing an exchange control system. the mechanism of this would be so that the central bank operates or supervises all transactions concerning foreign exchange. however, the controlling system, like all other international systems of payment, operates with some adjustments and i...