نتایج جستجو برای: b4c bn

تعداد نتایج: 8878  

Journal: :The Journal of Experimental Medicine 1972
Hans Binz Jean Lindenmann

RAT ALLOANTISERA OF THE FOLLOWING SPECIFICITIES WERE OBTAINED AFTER SINGLE SKIN GRAFT REJECTION: DA anti-BN, BN anti-DA, DA anti-Lewis, and Lewis anti-DA. Anti-alloantibodies were raised by injecting the first two alloantisera into (DA x BN)F(1) hosts and the last two alloantisera into (DA x Lewis)F(1) hosts. In this manner, four anti-alloantisera were raised: anti-(DA anti-BN), anti-(BN anti-D...

Journal: :Nanoscale 2015
Jun Hua Meng Xing Wang Zhang Hao Lin Wang Xi Biao Ren Chuan Hong Jin Zhi Gang Yin Xin Liu Heng Liu

Graphene/hexagonal boron nitride (h-BN) heterostructures have attracted a great deal of attention in recent years due to their unique and complementary properties for use in a wide range of potential applications. However, it still remains a challenge to synthesize large-area high quality samples by a scalable growth method. In this work, we present the synthesis of both in-plane and stacked gr...

Ahmad Reza Oliaey Asadollah Boshra Nasrin Zeighami,

The structures and stability of 531 novel boron nitride substituted isomers of 12-crown-4 etherverified theoretically. For a collection of 23 selected BN isomers, structural geometry, vibrationalstability, energy gaps, natural bond population analysis, and nonlinear optical responses investigatedtheoretically. The changes of standard enthalpies for ionization reactions and electron affinityreac...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1390

کامپوزیت های زمینه آلومینیومی به دلیل داشتن خواصی نظیر استحکام و سختی مناسب، مقاومت سایشی بالاو چگالی نسبتاً پایین در سال های اخیر مورد توجه طراحان و مهندسان برای کاربرد در صنایع مختلف قرار گرفته است. در این پژوهش تولید و ارزیابی کامپوزیت هایal-tic، al-b4c، al-tic-b4c با درصدهای مختلف از پودر tic و b4c با استفاده از ترکیب فرآیندهای ریخته گری همزدنی و ریخته گری کوبشی مورد مطالعه قرار گرفت. مشکل...

Journal: :Physical review letters 2001
F Mauri N Vast C J Pickard

Density functional theory is demonstrated to reproduce the 13C and 11B NMR chemical shifts of icosahedral boron carbides with sufficient accuracy to extract previously unresolved structural information from experimental NMR spectra. B4C can be viewed as an arrangement of 3-atom linear chains and 12-atom icosahedra. According to our results, all the chains have a CBC structure. Most of the icosa...

Journal: :journal of physical and theoretical chemistry 0
atefe nejati department of physics, computational physics lab., qom branch, islamic azad university, qom, iran hasan tashakori department of physics, computational physics lab., qom branch, islamic azad university, qom, iran faramarz kanjouri faculty of physics, kharazmi university, tehran, iran amirhosein esmailian department of physics, computational physics lab., qom branch, islamic azad university, qom, iran

in this work we use density functional theory based on the ultra-soft pseudo-potential to calculate thestructural, mechanical and thermal properties of narrow single walled bn, aln and gan nanotubes.the electron-electron interactions were expressed within the local density approximation (lda). wehave also obtained the phonon dispersion and elastic constants of these nanotubes using the densityf...

2008
Giovanni Fanchini Varun Gupta Adrian B. Mann Manish Chhowalla

In situ monitoring of the transformation of B4C under electric field using Raman spectroscopy is reported. Application of electric fields up to 5000 V/cm leads to local segregation of carbon, indicated by the appearance of Raman D and G peaks. At low electric fields (o3000 V/cm) the segregated carbon is amorphous, while at higher fields aromatic sp clustering is observed. Electrical measurement...

Journal: :The International journal of eating disorders 2001
R H Striegel-Moore F M Cachelin F A Dohm K M Pike D E Wilfley C G Fairburn

OBJECTIVE This study examined the relationship between binge eating disorder (BED), a newly proposed eating disorder, and bulimia nervosa (BN). METHOD Three groups recruited from the community were compared: women with BED (n = 150), women with purging BN (n = 48), and women with nonpurging BN (n = 14). RESULTS The three groups did not differ significantly in education, weight or shape conc...

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