ماکروسیکلهای شیف باز از اهمیت زیادی در شیمی آلی و دارویی برخوردار می باشند. این ماکروسیکلها با دارابودن گروه های مناسب در مکانهای مناسب می توانند فلزاتی مثل مس، نیکل و ... را در حفره های خود به دام انداخته، کمپلکسهای پایدار تولید نمایند. در این پایان نامه ابتدا یک دی آلدئید آروماتیک از گلیسیرین تهیه می شود و در مرحله بعدی واکنش با دی آمینهای آروماتیک و یا آلیفاتیک در رقتهای بسیار زیاد منجر به ت...

For some time researchers have focused on processes involved in mind-reading investigation the limitations in what is called automatic mind reading. As a part of mind-reading, visual perspective taking formed the base in the present study.  The study was performed to determining the impact of quality and quantity of others’ perspective on visual perspective taking. For this purpose, ...

Each researcher while studying about a specific issue is influenced by certain philosophical foundations for the research process. These foundations are such as glasses that in fact, researcher looks at research topic from behind it. In scientific communities, these foundations are introduced with the term of «paradigm» which indicates researcher›s approach about issues such as ontological, epi...

some researches made in the field of agency problem issue, deal with the role of control systems regarding owners and managers. in this research the relationship between the two control mechanisms, namely the voluntary disclosure (external control mechanism) and outside directors (internal control mechanism), which are reductive of agency problems, has been studied. for this reason, a sample ...

a professional is someone whose work involves performing a certain function with some degree of expertise. but a narrower definition limits the term to apply to people such as teachers and doctors, whose expertise involves not only skill and knowledge but also the exercise of highly sophisticated judgment, and whose accreditation necessitates extensive study, often university-based as well as p...

Abstract Background & Aim: Self harm is a deliberate,impulsive and nonfatal action that hurts person’s body and appears in different forms.The most widespread forms are injury or rupture of tissues,that called self mutilation. Self mutilation is seen in the varieties of mental or personality disorders. However some mutilate themselves for purpose of reparations or prosecution.This group are...

the present study is paid to the evaluation of the welfare program of the unemployment insurance in iran. the main purpose which was the main reason for performing this thesis, was the unemployment insurance plan’s challenges in iran such as financial problems of this plan, prolongation of the credit receipt for some insured people, unemployment slow exiting from the unemployment insurance fund...