نتایج جستجو برای: surface properties

تعداد نتایج: 1428668  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بوعلی سینا - دانشکده علوم پایه 1386

چکیده ندارد.

Journal: :Brazilian dental journal 2001
J C Spanó E L Barbin T C Santos L F Guimarães J D Pécora

The solvent effect of 4 concentrations of sodium hypochlorite (0.5, 1.0, 2.5, and 5.0%) on bovine pulp tissue and the level of residual chlorine, pH and surface tension before and after dissolution were studied in vitro. A fragment of bovine pulp was submersed in sodium hypochlorite that circulated in an apparatus with a peristaltic pump and Luer Lok syringe. The higher the concentration of sod...

Journal: :Dental materials journal 2004
Min Yan Hidekazu Takahashi Fumio Nishimura

The aim of the present study was to evaluate the dimensional accuracy and surface property of titanium casting obtained using a gypsum-bonded alumina investment. The experimental gypsum-bonded alumina investment with 20 mass% gypsum content mixed with 2 mass% potassium sulfate was used for five cp titanium castings and three Cu-Zn alloy castings. The accuracy, surface roughness (Ra), and reacti...

Journal: :Soft matter 2014
Anna C Balazs Joanna Aizenberg

This special issue focuses on so, recongurable materials. A distinctive feature of these systems is their ability to sense and respond to external stimuli or changes in the environment by readjusting their morphology, chemistry and/ or functionality. Examples abound in biology since this adaptive behaviour is vital for survival. Consider, for example, the ability of the mimic octopus and cutt...

Journal: :Small 2011
Jin Wang James D Byrne Mary E Napier Joseph M DeSimone

Nanomedicine is an emerging field that applies concepts in nanotechnology to develop novel diagnostics and therapies. Physical and chemical properties of particles, including size, shape, modulus, surface charge and surface chemistry, play an important role in determining particle-cell interactions, cellular trafficking mechanisms, biodistribution, and pharmacokinetics. This discussion focuses ...

2011
Min Xu Yang Pu Wubao Wang

Scanning backscattering imaging and independent component analysis (ICA) are used to probe targets hidden in the subsurface of a turbid medium. A new correction procedure is proposed and used to synthesize a "clean" image of a homogeneous host medium numerically from a set of raster-scanned "dirty" backscattering images of the medium with embedded targets. The independent intensity distribution...

Journal: :Journal of the American Chemical Society 2012
Shuxin Ouyang Hua Tong Naoto Umezawa Junyu Cao Peng Li Yingpu Bi Yuanjian Zhang Jinhua Ye

A strategy of reaction-environment modulation was employed to change the surface property of a semiconductor photocatalyst to enhance its photocatalytic performance. Surface alkalinization induced by a high alkalinity of the solution environment significantly shifted the surface energy band of a SrTiO(3) photocatalyst to a more negative level, supplying a strong potential for H(2)O reduction an...

2016
Antonella Gentile Francesco Ruffino Maria Grazia Grimaldi

Due to their peculiar qualities, metal-based nanostructures have been extensively used in applications such as catalysis, electronics, photography, and information storage, among others. New applications for metals in areas such as photonics, sensing, imaging, and medicine are also being developed. Significantly, most of these applications require the use of metals in the form of nanostructures...

2012
Claude Nogues Hervé Leh Joseph Lautru Olivier Delelis Malcolm Buckle

Non-specific binding to biosensor surfaces is a major obstacle to quantitative analysis of selective retention of analytes at immobilized target molecules. Although a range of chemical antifouling monolayers has been developed to address this problem, many macromolecular interactions still remain refractive to analysis due to the prevalent high degree of non-specific binding. In this manuscript...

Journal: :journal of dentistry, tehran university of medical sciences 0
haleh heshmat assistant professor, department of operative dentistry, islamic azad university, dental branch, tehran, iran. maryam hoorizad ganjkar assistant professor, department of operative dentistry, islamic azad university, dental branch, tehran, iran. solmaz jaberi dentist, dental research center, tehran university of medical sciences. mohammad javad kharrazi fard epidemiologist, dental research center, tehran university of medical sciences.

the growing demand for enhanced esthetic appearance has led to great developments in bleaching products. the exposure of hard tissues of the tooth to bleaching agents can affect the roughness of the enamel surface. the freshly bleached enamel surface exposed to various surface treatments such as fluoride and other remineralizing agents have been assessed in this study. the aim of this experimen...

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