The purpose of this paper is to review the application and the status of mono propellant Nitrous oxide (N2O) as a high energetic material in the space industry. Therefore Nitrous oxide is introduced and its usage in propulsion systems is discussed. The results suggest that this compound lies in the development of the miniaturization concept of space propulsion systems. Because of this combinati...

Due to the capacity of adjacent regions interactivity in economic field, industry development in a region not only increases the employment of that region but also it may increase the employment of adjacent regions by expanding related industries. So in this study after spatial effect test, the effect of tourism industry development on employment studied in the form of spatial dynamic panel dat...

‎in this article‎, ‎we have focused one some basic and productive information about the properties of spectrum and singular values related to compact operators which are ideals in a c*-algebra of bounded operators‎. ‎considering a two-sided connection between the family of symmetric gauge functions on sequence of singular values of compact operators and symmetric norms on finite dimensional ope...

اسانس گیاهان (خشک شده در سایه)، tanacetum tenuisectum , tanacetum polycephalum به دو روش: 1- تقطیر با آب 2- برای اولین بار به روش میکرواستخراج فاز جامد در فضای فوقانی گرفته شد و به روش gc/ms مورد آنالیز و شناسایی واقع گردید. عمده ترکیبات اسانس سرشاخه های گلدار گیاه (tanacetum polycephalum) hydrodistillation % compounds 12.07 camphor 10.66 1, 8- cineole 9.57 chrysanthenyl acetate – t...