نتایج جستجو برای: bn

تعداد نتایج: 8158  

Journal: :Angewandte Chemie 2021

Cationic BN-embedded polycyclic aromatic hydrocarbons (BN-PAH+s) were synthesized from a nitrogen-containing macrocycle via pyridine-directed tandem C?H borylation. Incorporating BN into PAH+ resulted in remarkable hypsochromic shift due to an increase the LUMO energy and symmetry changes of HOMO LUMO. Electrophilic substitution or anion exchange BN-PAH+ possessing tetrabromoborate as counter (...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده برق و کامپیوتر 1394

چکیده امروزه با پیشرفت و گسترش رایانه ها و شبکه های جهانی ارتباطی، امنیت و جلوگیری از دسترسی غیرمجاز کاربران به اطلاعات شخصی افراد و سازمان ها، یکی از مهم ترین چالش ها است. رمزنگاری و مخفی سازی اطلاعات، در دو زمینه ی اصلی تحقیقاتی و کاربردی عهده دار تأمین اهداف مختلف امنیت در ارتباطات هستند. استفاده از روش های رمزنگاری، سطح بالایی از امنیت تبادل اطلاعات را تأمین می کند؛ اما عیب رمزنگاری اطلاعا...

2013
David P. Basile Melinda R. Dwinell Shur-Jen Wang Brian D. Shames Deborah Donohoe Shaoying Chen Rajasree Sreedharan Scott K. Van Why

Brown Norway rats (BN, BN/NHsdMcwi) are profoundly resistant to developing acute kidney injury (AKI) following ischemia reperfusion. To help define the genetic basis for this resistance, we used consomic rats, in which individual chromosomes from BN rats were placed into the genetic background of Dahl SS rats (SS, SS/JrHsdMcwi) to determine which chromosomes contain alleles contributing to prot...

1987
Desmond N. Carney Frank Cuttitta Terry W. Moody John D. Minna

Human small cell lung cancers (SCLC) produce and secrete the regulatory peptide bombesin (BN) or its mammalian counterpart gastrinreleasing peptide (GRP). In addition, several SCLC tumor lines have been shown to express high affinity receptors for BN/GRP. On the basis of these findings, we investigated the effect of exogenously added BN and GRP on the soft agarose colony growth of a panel of hu...

Background. Different studies indicate a high prevalence of eating disorders in athletes. These disorders represent a serious defect in many areas of life. Eating disorders can lead to changes in consumer or intake of food and significant damage to physical health and psychosocial sports performance. Objectives. The aim of the present study was examining the effects of Cognitive Behavior Thera...

Journal: :Nanoscale 2014
Qing Tang Jie Bao Yafei Li Zhen Zhou Zhongfang Chen

Density functional theory computations with dispersion corrections (DFT-D) were performed to investigate the dihalogen interactions and their effect on the electronic band structures of halogenated (fluorinated and chlorinated) BN bilayers and aligned halogen-passivated zigzag BN nanoribbons (BNNRs). Our results reveal the presence of considerable homo-halogen (FF and ClCl) interactions in bila...

2002
Wai Chee SHIU Peter Che Bor LAM Hong Kong Lian-zhu ZHANG

Denote by B∗ n the set of all k∗-cycle resonant hexagonal chains with n hexagons. For any Bn ∈ B ∗ n , let m(Bn) and i(Bn) be the numbers of matchings (=the Hosoya index) and the number of independent sets (=the Merrifield-Simmons index) of Bn, respectively. In this paper, we give a characterization of the k∗-cycle resonant hexagonal chains, and show that for any Bn ∈ B ∗ n , m(Hn) ≤ m(Bn) and ...

2015
Sheng-jun Duan Nai-yong Ding Hua-shui Liu Qian Li Shi-ye Zhang Xue-yin Gai

The objective of this study was to determine a classification system for BN in incarcerated groin hernia patients and to explore the possible relationship between BN staging and patient outcomes. Incarcerated groin hernia patients treated with emergency bowel resection from January 2008 to December 2013 were screened for inclusion in a prospective study. A novel three-stage classification syste...

2004
ANDREJ ZLATOŠ

Let Ej be the eigenvalues outside [−2, 2] of a Jacobi matrix with an − 1 ∈ ` and bn → 0, and μ′ the density of the a.c. part of the spectral measure for the vector δ1. We show that if bn / ∈ `, bn+1 − bn ∈ `, then ∑ j (|Ej | − 2) = ∞, and if bn ∈ `, bn+1 − bn / ∈ `, then ∫ 2 −2 ln(μ′(x))(4− x) dx = −∞. We also show that if an − 1, bn ∈ `, then the above integral is finite if and only if an+1 − ...

Journal: :Applied sciences 2022

Epoxy resin is one of the most widely used thermosetting polymers and commonly applied in power electronics field. The intrinsic properties epoxy can be improved by introduction inorganic filler, thus fabricating a composite material. In this paper, different scales modified boron nitride (BN, 1 ?m, 10 ?m) were to improve thermal conductivity resin. surfaces BN modification silane coupling agen...

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