نتایج جستجو برای: 120 and 130 c

تعداد نتایج: 16977537  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

چکیده در بخش اول این کار پژوهشی، ترکیبات پیرانو[3,2-c]پیریدین از واکنش بین –nمتیل-5،3-دی بنزیلیدن پی پیریدین4-اون و مالونونیتریل در حضور نانو کاتالیست mcm-41-so3h و شرایط بدون حلال در مدت زمان 9 تا 15 دقیقه و دمای c? 115 با بازده بالا سنتز شدند. در بخش دوم این کار پژوهشی، ترکیبات -nآریل-?-آمینو-1،?-نفتیریدین نیز از واکنش سه جزیی بین –nمتیل-3،5-دی بنزیلیدن پی پیریدین4-اون، آنیلین و مالونونیتر...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده زبانهای خارجی 1390

acknowledgements i wish to express my gratitude to all those who have helped me in preparing this thesis. i would like to express my deep gratitude to my respected advisor dr. kourosh akef, whose advice and comments helped me in the early stages of the research and throughout the writing process. i would also like to express my gratitude to dr. hajar khanmohammad whose invaluable guidance he...

Journal: :International Journal of Hydrogen Energy 2021

Renewable energy storage and conversion is nowadays a major target for the scientific community. Their into hydrogen clear clean alternative their storage. This work shows, first time, results of SO2 depolarized electrolysis production at high temperature (120–170 °C) using phosphoric acid doped polybenzimidazole (PBI) membranes. A standard thermally cure PBI membrane with were used manufacturi...

Journal: :International Journal of Metalcasting 2021

In this study, the effect of austempering times on microstructures and mechanical properties dual-matrix structure austempered ductile iron (DMS-ADI) was investigated. With aim, unalloyed as-cast tensile samples were austenitized at 810 °C for 30 min to intercritical austenitizing followed by 350°C various (45 180 min). Experimental results showed that structures consisting proeutectoid ferrite...

Journal: :Journal of science and innovative development 2021

The article provides data that the depth of groundwater located at 2-2.5 m above sea level in moderately saline meadow-alluvial soil Bukhara region Republic Uzbekistan, which is applied agriculture immunostimulant contact and triple action - “Zerox” norms (1 2 3 l / t; 1 ha + surfactant 0.15 ha) terms (in pre-sowing treatment seeds, appearance 2-4 true leaves, budding flowering) cotton vegetati...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1375

this thesis basically deals with the well-known notion of the bear-invariant of groups, which is the generalization of the schur multiplier of groups. in chapter two, section 2.1, we present an explicit formula for the bear-invariant of a direct product of cyclic groups with respect to nc, c>1. also in section 2.2, we caculate the baer-invatiant of a nilpotent product of cyclic groups wuth resp...

Journal: :The Journal of Experimental Medicine 1993
A J da Silva O Janssen C E Rudd

Intracellular signaling from the T cell receptor (TCR)zeta/CD3 complex is likely to be mediated by associated protein tyrosine kinases such as p59fyn(T), ZAP-70, and the CD4:p56lck and CD8:p56lck coreceptors. The nature of the signaling cascade initiated by these kinases, their specificities, and downstream targets remain to be elucidated. The TCR-zeta/CD3:p59fyn(T) complex has previously been ...

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