نتایج جستجو برای: type a spermatogonia
تعداد نتایج: 13688682 فیلتر نتایج به سال:
Spermatocytic seminoma (SS) is a rare testicular neoplasm that occurs predominantly in older men. In this study, we aimed to shed light on the histogenesis of SS by investigating the developmental expression of protein markers that identify distinct subpopulations of human spermatogonia in the normal adult testis. We analysed the expression pattern of OCT2, SSX2-4, and SAGE1 in 36 SS cases and ...
Interest in spermatogonia has grown in recent years as a result of exciting developments in stem cell research in general and the development of new research tools allowing the isolation, culture and transplantation of these cells. This review focuses on the methodological breakthroughs and highlights the recent findings that have substantially increased understanding of spermatogonial physiolo...
In the adult testis, the precise control of the self-renewing replication and differentiation of stem spermatogonia is fundamental to male fertility. Previous studies have shown that the replication of A single (A(s)) spermatogonia, a population that includes the stem cells, is maximal at stage I of the cycle of the rat seminiferous epithelium and minimal at stage VII, while the ratio of A-pair...
چکیده: توده گرانیتی a-type شرق میشو در 60 کیلومتری شمال غربی تبریز و جنوب شرقی مرند رخنمون دارد که در امتداد گسل شمالی میشو در 247 میلیون سال پیش به درون سازند کهر تزریق شده است. این توده با رنگ های صورتی تا خاکستری حاوی کانی های فلسیک شامل کوارتز، فلدسپار پتاسیک و پلاژیوکلاز و کانی های مافیک شامل آمفیبول و بیوتیت می باشد. بافت های گرانولار دانه درشت تا دانه متوسط، پرتیت، میرمیکیت، راپاکیوی و...
the present study aimed at investigating the relationship between iranian efl teachers’ classroom management orientations and their teaching styles. additionally, the difference between male and female teachers’ teaching styles and classroom management orientations and their relationship with experience and age were explored. three hundred efl teachers filled in attitudes and beliefs on classro...
چکیده: در این رساله، ابتدا مفهوم *c-جبر را بیان می کنیم سپس با تجزیه و تحلیل دقیق مقاله های زیر grüss type inequalities in inner product modules,2005 schwarz and grüss type inequalities for c*- seminorms and positive linear functionals on banach *- modules,2011 ابتدا مفهوم *h-جبرها را بیان کرده و سپس بعضی از ویژگی های یک ضرب داخلی تعمیم یافته در مدولها روی *h-جبرها و *c-جبرهارابیان می کنیم ...
one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...
Background: Varicocele is a dilated vein of the pampiniform plexus that cause to det-rimental time-dependent effects so this study describes the effect of varicocele on the level of IL-6 and interferon gamma in serum and testis tissue, number of sertoli and spermatogonia cells, seminiferous tubules diameter and sperm activity in immature rats. Methods: Thirty six immature rats, 5-6 weeks aged ...
objective: testicular cell transplantation has been widely used to investigate the restoration of fertility in rodent models. in this research we apply transplantation as a treatment method in the cryptorchid model and compare this method with orchidopexy, which is the routine treatment for this problem. we studied the controversial effects of treatment on the number of germ cells and other mor...
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