Identifying the climatic indices and study of teleconnection is an important method in association with the purpose of synoptic climatology science. What are the most important indicators for Iran' s climate? For this aim, digital data of daily height for important atmospheric levels from the National Centers for environmental prediction and Atmospheric research for a period of 63 years (1948-2010) and daily temperature and precipitation data for 43 synoptic stations was received in 30years (since 1977-2008). from meteorological organization of Iran. By using the analysis method of main component the important atmospheric indices in the geographical limit of northern latitude of 10 to 70 degrees and 10 to 80 degrees of geographical east longitude for the cold half of year (fall and winter) were identified and through correlation method, the manner and importance of each one of these indices in Iran's climate were determined. The results showed that there are seven climatic indexes in the under study geographic area and the most important of them for Iran's climate from beginning of cold season up to the middle of March include the indices of Central Asia, North Siberia, Western Europe, Anatolia and the Western Mediterranean respectively. Indicators have the greatest impacts on the temperature of Iran’s climate and their precipitation effect is zonal. Most of the precipitation relationship is between the Caspian Sea coastal area and the index of Central Asia and Scandinavia - Central Siberia respectively in autumn and winter and whole of Iran with western Mediterranean. Thus, according to tobler’s principal in geography, the centers and the most important indicators of Iran's climate are near Iran and their importance is more than the climatic indices located in far away distances.

Suspension polymerization of styrene-acrylonitrile at 75oCunder atmospheric pressure was studied. To have copolymer with azeotropic composition, it was found that 30%AN in feed is needed. Different grades based on different average molecular weights were synthesized and relative procedures discussed. Mixed initiators of lauryl peroxide and benzoylperoxide were used in presence of n-dodecylmercaptane (n-ddm) as chain transfer agent. It was found that for isothermal copolymerization the optimum concentration of n-ddm is 0.1%.

In this paper, based on measurements of hemispherical total emissivity by calorimetric method at very low pressure from cooling rate of different specimens with different emissivities , and gathering experimental information about cooling rate at atmospheric to 3 x 10-5 torr pressures , a relatively simple technique with accessible equipment is proposed for measuring the hemispherical total emissivity of plane solid surfaces in the range 0.05 to 0.98 at temperatures below 100°C with reasonable accuracy.

The pulping of rice straw with diethylene glycol, diethylene glycol + ethylene glycol and diethylene glycol+ ethylene glycol + 2% NaOH was studied in order to investigate the effects of the cooking variables (temperature and different organic solvent mixtures) on the properties of obtained pulp (cooking yield, Kappa number, freeness (CSF)) and paper (breaking length, burst index, folding endurance, tear index). Delignification was increased by increasing the temperature and hand sheet papers with better bondability of fibres were obtained, but the strength or length of the fibres with increasing temperature were decreased. With the use of 2% sodium hydroxide in cooking solvent papers with superior mechanical properties were obtained. Properties that are sensitive to bondability of fibres, such as, breaking length, burst index, folding endurance, were increased with increasing of temperature, but another property sensitive to length or strength of fibres, that is, tear index, was decreased with increasing of temperature.