2-phosphonobutane-1,2,4-tricarboxylic acid is(pbtc) a member of phosphonate family, and used as corrosion and scale inhibitor in cooling water systems. phosphonocarboxylates as a member of organophosphorus compounds have c-p and p-o bonds in their structures. pbtc is mainly used as carbonate scale inhibitor (caco3), sulphate scale inhibitor (caso4), corrosion inhibitor of low alloyed steel, eff...

Bowen in Guerin (1976) describes the family as the system in which every activity produces a reaction in one or more of its members. This system includes not only the family but also relatives. Every member is presumed to play a role which is relatively stable. A member has a degree of personal differentiation from family of origin, the ability to be one’s self in the presence of pressure that ...

a family in which two members are affected by pemphigus vulgaris is presented from gilan. up to now only 25 families in which more than one member was affected have been reported

family plays an important role in physical activity behaviors in children andadolescents although the procedure of this effect is not clear. this study wasdesigned to explore the family role in forming female adolescents’ physical activitybehavior. this study used a qualitative procedure and content analysis method. tocollect data, semi–structured interviews were conducted with 25 participants ...

A family in which two members are affected by pemphigus vulgaris is presented from Gilan. Up to now only 25 families in which more than one member was affected have been reported