نتایج جستجو برای: نانولوله bn
تعداد نتایج: 10109 فیلتر نتایج به سال:
هدف این پژوهش, آرایش نانولوله کربنی با نانوذرات TiO2 با استفاده از روش شیمی تر و بررسی پایداری نانوسیال ناشی از نانوذرات 4 TiO2 آن میباشد. بدین منظور، از نانولولههای کربنی چنددیواره و تتراکلرید تیتانیوم (TiCl4) به عنوان پیشساز استفاده گردید. ارزیابی میکروسکوپ الکترونی عبوری جهت اطمینان از آرایش نانولوله با نانوذرات TiO2 انجام گرفت. تاثیر عملیات اسید شویی و آرایش بر ساختار نانولوله نیز با کم...
BN rats develop interstitial nephritis after immunization with rabbit, but not rat renal tubular antigen. Using RT1n rat strains that differentially express tubular antigen, we investigated the unresponsiveness of BN rats to BN tubular antigen (BN-TBM) using delayed-type hypersensitivity (DTH) responses to BN-TBM as a measure of cell-mediated immunity. Our results indicate that rat strains expr...
A set of n triangles sharing a common edge is called a book with n pages and is denoted by Bn. It is known that the Ramsey number r (Bn) satisfies r (Bn) = (4 + o (1))n. We show that every red-blue edge coloring of Kb(4−ε)nc with no monochromatic Bn exhibits quasi-random properties when ε tends to 0. This implies that there is a constant c > 0 such that for every red-blue edge coloring of Kr(Bn...
در این رساله، در بخش اول ویژگی های الکترونی صفحات گرافن خالص و ناخالص شده با نیتروژن (گرافیتی، پیریدینی و پیرولی) بررسی شده است. در ادامه با انباشته کردن صفحات گرافن خالص، گرافیتی و پیریدینی وتشکیل گرافیت خالص و نا خالص و قرار دادن اتم های لیتیم در بین آن ها با چیدمان 1stage-، ویژگی های الکترونی آن ها مورد بررسی قرار گرفته است. در گرافن خالص نوار ظرفیت و هدایت یکدیگر را در نقطه k قطع می کنند در...
The mechanisms regulating receptor internalization are not well understood and vary among different G protein-coupled receptors. The bombesin (Bn)/gastrin-releasing peptide receptor GRP-R, which is coupled to phospholipase C via the Gq family of transducing proteins, is internalized rapidly after Bn binding. Agonist stimulation leads to rapid receptor phosphorylation, as does activation of prot...
The extracellular portion of the granulocyte colony-stimulating factor (G-CSF) receptor has a mosaic structure of six domains (each approximately 100 amino acid residues) consisting of an immunoglobulin-like (Ig) domain, a cytokine receptor homologous region subdivided into amino-terminal (BN) and carboxyl-terminal (BC) domains, and three fibronectin type III repeats. In the present study, we e...
Bombesin/gastrin releasing peptide (BN/GRP) functions as an auto crine growth factor in small cell lung cancer (SCLC). Previously, this autocrine growth cycle was disrupted by a monoclonal antibody which binds to the carboxyl terminal of BN and neutralizes the peptide so that it is unable to interact with the BN/GRP receptor. Here a series of BN analogues were synthesized which have a reduced p...
Atomically thin hexagonal boron nitride (h-BN), as a graphene analogue, has attracted increasing interest because of many fascinating properties and a wide range of potential applications. However, it still remains a great challenge to synthesize high-quality h-BN with predetermined number of layers at a low cost. Here we reported the controlled growth of h-BN on polycrystalline Pt foils by low...
The interfaces between monolayer boron carbonitrides and hexagonal boron nitride (h-BN) play an important role in their practical applications. Herein, we respectively investigate the structural and electronic properties of two metal-free heterobilayers constructed by vertically stacking two-dimensional (2D) spintronic materials (B4CN3 and B3CN4) on a h-BN monolayer from the viewpoints of latti...
OBJECTIVE Bulimia nervosa (BN) is associated with low self-esteem. This study was designed to assess whether low self-esteem persists in nondepressed individuals who have recovered from BN (BN-R). METHOD Study groups included BN (n = 22), BN-R (n = 20), and healthy controls (n = 42). Participants were medication-free, and none met criteria for current major depression. Assessment instruments ...
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