نتایج جستجو برای: mechanochemical processing

تعداد نتایج: 501571  

In recent years, much research in the field of advanced materials synthesis using the mechanochemical process has been performed. In this study, Al2O3-TiN nanocomposite was produced by the mechanochemical method and using inexpensive material TiO2 (instead of pure titanium which is too expensive). Also, aluminum and titanium oxide powders were used as raw materials. Milling under N2 atmosphere ...

In the present study, FeAl/Al2O3 nanocomposite coating was produced on the carbon steel plate using mechanical alloying (MA) technique via a mechanochemical reaction. Stoichiometric ratios of Fe, Al and Fe2O3 as well as a substrate were mixed and milled up to 22h in a vibrating high energy mill with a 4 mm ball. Samples prepared after 18h of MA were subjected to annealing at 773 K for 1-3 h. X-...

Journal: :Zapiski Gornogo instituta 2022

Based on a package of modern analysis methods, the influence various acids and energy effects morphology, elemental composition, structural chemical transformations mineral surface, efficiency eudialyte concentrate leaching was studied. The mechanism optimal conditions specific features destruction rock minerals extraction zirconium REE under acids, powerful nanosecond pulses, dielectric barrie...

Journal: :Faraday discussions 2014
Monika J Rak Tomislav Friščić Audrey Moores

A versatile, low-energy and solvent-free method to access nanoparticles (NPs) of four different transition metals, based on a bottom-up mechanochemical procedure involving milling of inorganic precursors, is presented. Lignin, a biomass waste, was used effectively as a reducing agent, for the first time in a mechanochemical context, to access MNPs where M = Au, Pd, Ru, Re. A series of metal pre...

Journal: :Dalton transactions 2012
Hirotoshi Sakamoto Ryotaro Matsuda Susumu Kitagawa

A detailed investigation into the mechanochemical synthesis of coordination pillared-layer frameworks (CPLs), particularly CPL-1, was carried out. In the case of CPL-1, a two-step reaction was observed (from the starting reactants to the final product). In the conventional solution process, no intermediate state was detected. We found that moisture is essential in both the reaction steps. After...

Journal: :Nature chemistry 2013
Tomislav Friščić Ivan Halasz Patrick J Beldon Ana M Belenguer Frank Adams Simon A J Kimber Veijo Honkimäki Robert E Dinnebier

Chemical and structural transformations have long been carried out by milling. Such mechanochemical steps are now ubiquitous in a number of industries (such as the pharmaceutical, chemical and metallurgical industries), and are emerging as excellent environmentally friendly alternatives to solution-based syntheses. However, mechanochemical transformations are typically difficult to monitor in r...

Journal: :Journal of cell science 2013
F Jon Kull Sharyn A Endow

Kinesins and myosins hydrolyze ATP, producing force that drives spindle assembly, vesicle transport and muscle contraction. How do motors do this? Here we discuss mechanisms of motor force transduction, based on their mechanochemical cycles and conformational changes observed in crystal structures. Distortion or twisting of the central β-sheet - proposed to trigger actin-induced Pi and ADP rele...

2016
Giovanni Cagnetta Han Liu Kunlun Zhang Jun Huang Bin Wang Shubo Deng Yujue Wang Gang Yu

Brominated organic pollutants are considered of great concern for their adverse effect on human health and the environment, so an increasing number of such compounds are being classified as persistent organic pollutants (POPs). Mechanochemical destruction is a promising technology for POPs safe disposal because it can achieve their complete carbonization by solvent-free high energy ball milling...

Journal: :The EMBO journal 2008
Rajesh Ramachandran Sandra L Schmid

The GTPase dynamin is a mechanochemical enzyme involved in membrane fission, but the molecular nature of its membrane interactions and their regulation by guanine nucleotides and protein effectors remain poorly characterized. Using site-directed fluorescence labeling and several independent fluorescence spectroscopic techniques, we have developed robust assays for the detection and real-time mo...

2003
Frederick H. Silver Dale DeVore Lorraine M. Siperko

Silver, Frederick H., Dale DeVore, and Lorraine M. Siperko. Invited Review: Role of mechanophysiology in aging of ECM: effects of changes in mechanochemical transduction. J Appl Physiol 95: 2134–2141, 2003; 10.1152/japplphysiol.00429.2003.—Mechanical forces play a role in the development and evolution of extracellular matrices (ECMs) found in connective tissue. Gravitational forces acting on ma...

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