نتایج جستجو برای: cell surface structure

تعداد نتایج: 3449013  

Journal: :iranian biomedical journal 0
محمدرضا باغبان اسلامی نژاد mohamadreza baghaban eslaminejad لیلا تقی یار leila taghiyar فهیمه فلاحی fahimeh falahi

background: while articular chondrocytes are among those appropriate candidates for cartilage regeneration, the cell dedifferentiation during monolayer culture has limited their application. several investigations have indicated the usefulness of alginate, but the topic of proliferation and differentiation of chondrocytes in alginate culture has still remained controversial. methods: rat articu...

In this study, detailed fluid flow and heat transfer in cooling plates of polymeric membrane fuel cell is studied using computational fluid dynamics (CFD) techniques. The performances of four different coolant flow field designs were compared in terms of the maximum surface temperature, temperature uniformity and pressure drop characteristics. The results indicate that the porous flow field wit...

Journal: :research in pharmaceutical sciences 0
mina mirian razieh taghizadeh hossein khanahmad mansour salehi ali jahanian-najafabadi hojjat sadeghi-aliabadi

hepatitis b virus (hbv) is considered as a global health concern and hepatitis b surface antigen (hbsag) is the most immunogenic protein of hbv. the purpose of this study was to evaluate the expression of hbsag on the cell surface of human embryonic kidney cell line (hek293t). after transformation of expression vector pcdna/hbsag to e.coli top10f’, plasmid was extracted and digested with bglii....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this thesis protic and aprotic ammonium-based ionic liquids were synthesized and their surface tensions were measured in the range of 298-373k. the protics are alkyl ammonium-based ils with the carboxylate (formate, acetate, propionate) anion and aprotics are quaternary ammonium-based ils with bis(trifluoromethylsulfonyl)imide anion. capillary rise method was used for surface tension measure...

Journal: :avicenna journal of phytomedicine 0
abdorrahim absalan department of clinical biochemistry, faculty of medical sciences, tarbiat modares university, tehran, iran seyed alireza mesbah-namin department of clinical biochemistry, faculty of medical sciences, tarbiat modares university, tehran, iran taki tiraihi department of anatomical sciences, faculty of medical sciences, tarbiat modares university, tehran, iran taher taheri shefa neuroscience research center, khatam alanbia hospital, tehran, iran.

objective: the aim of this study was to estimate the cheminformatics and qualitative structure-activity relationship (qsar) of cinnamaldehyde and eugenol. the effects of cinnamaldehyde and eugenol on the viability, doubling time and adipogenic or osteogenic differentiations of human adipose-derived mesenchymal stem cells (hascs) were also investigated.  materials and methods: qsar and toxicity ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1352

تعاریفی که برای نفی در اکثر کتابهای گرامری فارسی و انگلیسی آمده ناکافی است زیرا نفی می تواند به چند طریق مختلف بکار رود: می تواند متضاد جمله مثبت باشد، می تواند عدم کیفیت مثبت را تاکید نماید، و میتواند به عملی اطلاق شود که انجام نشده است . دان ل.ف . نیلسون معتقد است که نفی در معنای وسیع خود "موضوع بزرگ و سخت توصیفی است " . در این رساله مسائل مختلف مربوط به نفی در فارسی و انگلیسی مورد بررسی قرار...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی 1393

asymmetric membranes are widely used in many industrial membrane separation processes. the major advantage of membrane filtration over the conventional process is its ability to remove a wider spectrum of particles without using any chemicals. hollow fiber configuration offer many advantages over flat-sheet or tubular membranes. the spinning process of hollow fiber may look simple, yet it is te...

Journal: :journal of current ophthalmology 0
مهدی حسینی تهرانی mehdi hosseinitehrani سیدفرزاد محمدی s-farzad mohammadi آسو عل محمودی asou alimahmoudi ونداد فرهادی vandad farhady

we are describing a new surgical approach in the management of advanced ocular surface cicatrization through a single procedure conjunctival-limbal-corneal allograft in which the external eye is resurfaced it involves a lamellar corneolimbal keratoplasty, 360° limbal stem cell transfer (on a “bipedicle” conjunctival-corneal carrier), and conjunctival tissue transplantation - all in a single con...

Journal: :avicenna journal of medical biotechnology 0

background: micropatterning is becoming a powerful tool for studying cells in vitro. this method not only uses very small amount of material but also mimic the microenvironment structure present in living tissues better than flask culturing techniques. in previous studies using micropatterning of extracellular matrix proteins on glass surfaces, the rate of protein detachment from the surface wa...

Graphene has exhibited wide applications in nanotechnology, especially in biomedicine because of its unique physical and chemical properties. The degree of toxicity of graphene materials depends on various factors such as surface charge, physicochemical properties, toxicity determination methods, and cell line. Direct contact of the very sharp edges of graphene with the cell membrane is one of ...

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