نتایج جستجو برای: mechanochemical processing

تعداد نتایج: 501571  

1999
José F. Fernández-Bertran

The field of mechanochemistry is reviewed. A large number of mechanochemical reactions are described as well as industrial applications. INTRODUCTION At the beginning of this century, W. Nernst classified the different fields of chemistry according to the type of energy supplied to the system: thermochemistry, electrochemistry, photochemistry, etc. The name mechanochemistry was applied to the f...

Ehsan Mohammad Zahrani Mohammad Hossein Fathi,

        Synthetic hydroxyapatite (HA) is the most helpful because of its similarity to natural bone in both crystalline structure and chemical composition. Recently, fluoridated hydroxyapatite (FHA) has been developed in dental and orthopedic application because it has lower solubility than pure HA, while maintaining the comparable bioactivity and biocompatibility. The aim of this study was to...

2018
Joseph L. Howard Qun Cao

Mechanochemistry is becoming more widespread as a technique for molecular synthesis with new mechanochemical reactions being discovered at increasing frequency. Whilst mechanochemical methods are solvent free and can therefore lead to improved sustainability metrics, it is more likely that the significant differences between reaction outcomes, reaction selectivities and reduced reaction times w...

Journal: :Physical review letters 2008
Masatoshi Nishikawa Hiroaki Takagi Tatsuo Shibata Atsuko H Iwane Toshio Yanagida

Mechanochemical coupling was studied for myosin II and V consistently. The fluctuation in myosin V motility was determined by correlating the stochasticity of the ATPase reaction with regular displacements per one ATP, consistent with a tight mechanochemical coupling. In contrast, myosin II, working in an ensemble, was explained by a loose coupling, generating variable step sizes which depend o...

2009
S. N. Ng Y. P. Tan Y. H. Taufiq-Yap

Bismuth niobate solid solutions, BixNbOδ (2.5 ≤ x ≤ 6), have been prepared using a mechanochemical method. The solid solutions were also prepared using a solidstate conventional method for comparison purposes. Bi3NbO7 was successfully obtained via a mechanochemical method at a lower synthesis temperature (milled at 1000 rpm for one hour followed by heating at 700C for 24 h) than the conventiona...

2018
Kendra Leahy Denlinger Lianna Ortiz-Trankina Preston Carr Kingsley Benson Daniel C Waddell James Mack

Mechanochemistry is maturing as a discipline and continuing to grow, so it is important to continue understanding the rules governing the system. In a mechanochemical reaction, the reactants are added into a vessel along with one or more grinding balls and the vessel is shaken at high speeds to facilitate a chemical reaction. The dielectric constant of the solvent used in liquid-assisted grindi...

Journal: :International Journal of Applied Glass Science 2022

Abstract The aim of this article is to study the nature defects arising on surface silica glass during mechanical processing followed by chemical cleaning and etching. Such manifest themselves as a narrow Raman peak near 85 cm –1 . It shown that etching ground leads formation microcrystalline embedded at depth near‐surface layer. Defects kind create heterogeneities in structure atomic network i...

Journal: :Vascular 2014
Hayley M Moore Tristan R A Lane Ian J Franklin Alun H Davies

We present the first case of retrograde ablation of the small saphenous vein to treat active venous ulceration. A 73-year-old gentleman with complicated varicose veins of the left leg and a non-healing venous ulcer despite previous successful endovenous treatment to his left great saphenous vein underwent mechanochemical ablation of his small saphenous vein with the ClariVein® system, under loc...

2014
Asha-Dee N. Celestine Brett A. Beiermann Jeffrey S. Moore Nancy R. Sottos Scott R. White

Fracture-induced mechanochemical activation is achieved for the first time in a structural engineering polymer. Rubber toughened PMMA is lightly cross-linked (1.0 mol%) with the mechanophore spiropyran by free radical polymerization. Single Edge Notch Tension tests are performed on the spiropyran-linked material and a distinct change in color and fluorescence is detected at the crack tip, indic...

Journal: :Microelectronics Journal 2008
L. C. Sánchez A. M. Calle J. D. Arboleda J. Osorio K. Nomura C. A. Barrero

In this work, iron-doped SnO2 powders were prepared by two methods: mechanical alloying and mechanochemical alloying with successive thermal treatment. The influence of different milling conditions such as ball to powder weight ratio, milling time, rotation velocity of supporting disc and the type of iron starting reactive and their Fe concentration on the structural and magnetic properties of ...

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