the history of plant’s used for mankind is as old as the start of humankind. initially, people used plants for their nutritional proposes but after the discovery of medicinal properties, this natural ?ora became a useful source of disease cure and health improvement across various human communities. berberis vulgaris is one of the medicinal plants used in iranian traditional medicine. berberis ...

Low pressure injection molding (LPIM) method in this paper is investigated as a method of forming alumina parts. This is one of the methods of making engineering ceramics with complex shapes and high dimensional accuracy. In this method, a binder system (paraffin wax + carnuba wax) was used as a plastic agent for easy formation of alumina particles. Different parameters such as feedstock temper...

سالهاست که دو فرضیه متفاوت در مورد منشا سرطان مطرح است. در یک فرضیه چنین استنباط می شود که سلولهای بنیادی بالغ برای شروع فرایند تومورزایی ضروری می باشند و در حالیکه در فرضیه دیگر ادعا می شود که سلولهای تمایز یافته، تمایز خود را از دست داده، باز برنامه ریزی و تبدیل به سلولهای سرطانی می شوند. هدف اصلی در این مطالعه بررسی بیان ژنهای موثر در پدیده بازبرنامه ریزی سلولی در سرطان سلول سنگفرشی مری است....

a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...