since the surface water is one of the main potable water resources, the usage of chlorine as a disinfectant has increased. consequently the production rate of disinfection by-products (dbps) such as trihalomethane (thm) compounds has grown dramatically. in this paper the thms concentration changes in the sangar water treatment plant (swtp) and rasht water distribution system (rwds) is presented...

Cluster headache (CH) is characterized by attacks of strictly unilateral, severe pain with orbital, supraorbital, or temporal location. They are accompanied by ipsilateral cranial autonomic features. Typical characteristics are short duration; pain occurring on one side of head, including eye area; and extreme intensity.[1] Pathophysiology of CH is not fully understood. [2] The pain almost alwa...

AGAMOUS (AG) is an Arabidopsis MADS box gene required for the normal development of the interna1 two whorls of the flower. AG RNA accumulates in distinct patterns early and late in flower development, and several genes have been identified as regulators of AG gene expression based on altered AG RNA accumulation in mutants. To understand AG regulatory circuits, we are now identifying cis regulat...