نتایج جستجو برای: hyrogen bonding

تعداد نتایج: 43815  

Journal: :journal of dentistry, tehran university of medical sciences 0
m. hasani tabatabaei y. alizade s. taalim

statement of problem: in some clinical situations, repair of composite restorations is treatment of choice. improving the bond strength between one new and old composite usually requires increased surface roughness to promote mechanical interlocking since chemical bonding might not be adequate. similarly, the treatment of a laboratory fabricated resin composite restoration involves the same pro...

Journal: :نشریه دانشکده فنی 0
علی حقیری مصطفی کتابچی نادر پروین

copper–silver bimetallic strips were produced by cold roll welding process and were treated by diffusion annealing in the temperature range 250–800 ?c. the interface bonding strength was determined by bending and peeling tests, resistance, conductivity and micro hardness profiles were determined and microstructure in the interface region was observed by optical microscope. electrical resistance...

1994
F. Niklaus

Wafer bonding with intermediate polymer adhesives is an important fabrication technique for advanced microelectronic and microelectromechanical systems, such as three-dimensional integrated circuits, advanced packaging, and microfluidics. In adhesive wafer bonding, the polymer adhesive bears the forces involved to hold the surfaces together. The main advantages of adhesive wafer bonding include...

Journal: :Computation 2016
Zhiqiang Chen Chiyu Xie Yu Chen Moran Wang

The hydro-mechanical coupling transport process of sand production is numerically investigated with special attention paid to the bonding effect between sand grains. By coupling the lattice Boltzmann method (LBM) and the discrete element method (DEM), we are able to capture particles movements and fluid flows simultaneously. In order to account for the bonding effects on sand production, a cont...

Journal: :Bioscience, biotechnology, and biochemistry 1999
M Ohtake H Yamamoto T Uchiyama

For discovering the components that contributed to the bonding strength of the glue substances produced by appressoria of Pyricularia oryzae on wax-coated cover-glasses, the influences of metabolic inhibitors and hydrolytic enzymes were investigated. The bonding strength of appressoria was assessed by the ratio of the remaining appressoria after sonication to the appressoria formed before sonic...

ژورنال: مجله دندانپزشکی 2013
جلالی, حمید , رشتاک, شاداب , صدیق‌پور, لیلا , میرمحمدرضایی, سوسن ,

  Background and Aims: Retention and stability of the post and core system is the key factor for success of final restoration . The aim of this study was to evaluate the microtensile bond strength of the different composite core materials and bonding systems to a fiber post.   Materials and Methods: To evaluate the bond strength of the composite resins to a fiber post ( DT light post) 60 posts ...

Mahan Dadpoor, Yasaman Sadeghi Dehbaneh,

Abstract Introduction: The demand of patients for tooth-colored restorations is increasing, and the need for proper dental bonding agents is undeniable. The purpose of this study was to evaluate the knowledge of general dentists practicing in Rasht city about dental bonding agents in 2020. Materials and Methods: In this descriptive cross-sectional study, 161 dentists working in Rasht city wer...

ژورنال: رویش روانشناسی 2023

This study aimed to compare the school bonding and interpersonal problems in students with unsupervised and abused families with normal families in Bandar Lengeh. The sample consisted of 152 normal students and 81 unsupervised or abused students. Normal students were selected by the multi-stage cluster sampling method. Data were collected through two questionnaires: school bonding (Rezaei Shari...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

abstract the influence of cation?? and anion?? interactions on the strength and nature of n…h hydrogen bond has been investigated by quantum chemical calculations in s-triazine…3hf complex. ab initio calculations were performed at mp2/6-311++g(d,p) level of theory. the natural bond orbital (nbo) analysis and the bader’s quantum theory of atoms in molecules (aim) were also used to elucidate t...

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