نتایج جستجو برای: عدم هم جوشی kissing bond

تعداد نتایج: 224675  

Journal: :Circulation. Cardiovascular interventions 2010
Patrice Guérin Paul Pilet Gérard Finet Yann Gouëffic Jean Michel N'Guyen Dominique Crochet Isabelle Tijou Pierre Pacaud Gervaise Loirand

BACKGROUND The use of a drug-eluting stent (DES) has strongly limited the incidence of in-stent restenosis in bifurcation lesions; nevertheless, restenosis still remains a problem at the origin of the bifurcation side branch. The aim of this study is to analyze the consequences of the kissing postdilatation technique on 5 DESs, using microfocus x-ray computerized tomography and scanning electro...

Journal: :Personal Relationships 2023

Same-sex performativity (SSP), or public performances of sexuality (e.g., kissing) between women who identify as heterosexual, is a relatively common relational experience among college-aged women. Identifying patterns women's motivations for engaging in SSP can elucidate the heterogeneity social and sexual behaviors during critical developmental period (i.e., college). We used latent class ana...

ژورنال: :فصلنامه علمی - پژوهشی مواد نوین 2015
مهدی شاه بندری سورانی رضا ابراهیمی کهریزسنگی ابراهیم کرمیان

تف جوشی نانوکامپوزیت al2o3-tib2 سنتز شده به روش مکانوشیمیایی بمنظور بهبود خواص آن مورد بررسی قرار گرفت. بدین منظور، ابتدا مواد اولیه شامل پودر آلومینیوم(al)، اکسیدتیتانیوم(tio2) و اکسیدبور(b2o3) با نسبت استوکیومتری مخلوط شده و در دمای محیط، در اتمسفر خنثی و در زمان های 5/2، 6 و10ساعت آسیاب شدند.     آنالیز پراش پرتو ایکس (xrd) بمنظور تعیین نوع فازهای تشکیل شده و اندازه دانه های کریستالی مورد اس...

ژورنال: :مهندسی مکانیک مدرس 2014
هادی عبداللهی روح اله پناهی لیاولی رمضانعلی مهدوی نژاد وحید زال

در این تحقیق به بررسی قابلیت ماشینکاری قطعات متالورژی پودر خام و تف جوشی شده آهن-چدن خاکستری بازیابی شده پرداخته می شود. برای این منظور براده های چدن خاکستری با استفاده از روش آسیاب پاششی تبدیل به پودر شده و در ترکیب با پودر آهن تجاری برای تهیه قطعات متالورژی پودر مورد استفاده قرار گرفتند. خشته-های خام با متغیرهای درصد پودر چدن و فشار تراکم تهیه شدند. برای قطعات تف جوشی شده نیز طراحی آزمایش با ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2013
A Doostmohammadi A M Ardekani

The anisotropic structure of fluidized suspensions is governed by their microstructures which are in turn determined by the dynamics of particle pair interactions. Here, we present a numerical simulation of particle interaction in linearly stratified fluids. It is shown that unlike homogeneous fluids, stratification results in the attraction of particles settling abreast. The attraction between...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Mihaela-Rita Mihailescu John P Marino

In HIV type 1 (HIV-1), the dimerization initiation site (DIS) is the sequence primarily responsible for initiating the noncovalent linkage of two homologous strands of genomic RNA during viral assembly. The DIS loop contains an autocomplementary hexanucleotide sequence and forms a symmetric homodimer through a loop-loop kissing interaction. In a structural rearrangement catalyzed by the HIV-1 n...

2007
Xiaoyan Sun Qi Zhang Hashim M. Al-Hashimi

Stem loop 1 (SL1) is a highly conserved hairpin in the 5'-leader of the human immunodeficiency virus type I that forms a metastable kissing dimer that is converted during viral maturation into a stable duplex with the aid of the nucleocapsid (NC) protein. SL1 contains a highly conserved internal loop that promotes the kissing-duplex transition by a mechanism that remains poorly understood. Usin...

Journal: :The EMBO journal 1996
E V Pilipenko K V Poperechny S V Maslova W J Melchers H J Slot V I Agol

The key steps in the replication of the poliovirus genome, initiation of (-) and (+) strands, require two different cis-acting elements, oriR and oriL, respectively. It has been proposed that the spatial organization of these elements is maintained by tertiary ('kissing') interactions between the loops of two constituent hairpins. Here, the putative partners of the kissing interaction within th...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Xiaohu Huang Lei Sun Shuangxi Ji Ting Zhao Wanrui Zhang Jiejia Xu Jue Zhang Yanru Wang Xianhua Wang Clara Franzini-Armstrong Ming Zheng Heping Cheng

Mitochondria in many types of cells are dynamically interconnected through constant fusion and fission, allowing for exchange of mitochondrial contents and repair of damaged mitochondria. However, constrained by the myofibril lattice, the ∼6,000 mitochondria in the adult mammalian cardiomyocyte display little motility, and it is unclear how, if at all, they communicate with each other. By means...

2017
Erik Groot Jebbink Thijs G Ter Mors Cornelis H Slump Robert H Geelkerken Suzanne Holewijn Michel MPJ Reijnen

Objectives Various configurations of kissing stent (KS) configurations exist and patency rates vary. In response the covered endovascular reconstruction of the aortic bifurcation configuration was designed to minimize mismatch and improve outcome. The aim of the current study is to compare geometrical mismatch of kissing stent with the covered endovascular reconstruction of the aortic bifurcati...

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