نتایج جستجو برای: micrometric particles
تعداد نتایج: 156828 فیلتر نتایج به سال:
Abstract Dust in space environments is now recognized as a major concern for successful manned and robotic exploration colonization missions. Indeed, thin layer of dust covers the lunar surface made loose granular material, consisting broad range shapes, sizes, types sediments, which mainly consists silicate minerals form micrometric, sharp, abrasive, porous, chemically reactive particles. The ...
Al-Zn-Mg/3 wt-% Al2O3 nanostructured composite powder was synthesized through Mechanical Alloying (MA). At first, the 7014 alloy matrix constituents were milled in a planetary ball mill for 20 hours. Then, 3 wt.% µ-Al2O3 particles were added to the pre-milled matrix and the nanostructured composite powder was produced at different MA times to investigate the effects of MA time ...
BACKGROUND Micrometric and nanometric particles are increasingly used in different fields and may exhibit variable toxicity levels depending on their physicochemical characteristics. The aim of this study was to determine the impact of the size parameter on cellular uptake and biological activity, working with well-characterized fluorescent particles. We focused our attention on macrophages, th...
Introduction: We are developping a micromanipulation line and a spectroscopic method for providing chemical imagery data on Organic Matter (OM) trapped in micrometric grains (Interplanetary Dust Particles, matrix grains extracted from pristine chondrites, STARDUST samples, etc.) The general framwork of our approach is based on the complementarity of Multi Wavelength Raman spectroscopy (includin...
The increasing interest in nanoscience in many research fields like physics, chemistry, and biology, including the environmental fate of the produced nano-objects, requires instrumental improvements to address the sub-micrometric analysis challenges. The originality of our approach is to use both the super-resolution concept and multivariate curve resolution (MCR-ALS) algorithm in confocal Rama...
The possibility to generate acoustic modes based on FPWs (Flexural Plate Waves) in a generic non-piezoelectric substrate for microfludic applications by means of piezoelectric actuators has been explored and described in this paper. The FPW acoustic modes are generated by means of actuators made of Lead Zirconate Titanate (PZT) layers with InterDigital Transducers (IDTs) screen-printed on alumi...
OBJECTIVES The purpose of this study was to analyze the behavior in water, related to mechanical properties, of experimental composites for dental restoration. METHODS The studied materials were composed of a visible-light-curing monomer mixture (Bis-GMA and TEGDMA or HEMA) and micrometric, nanometric or a mixture of both sizes hydroxyapatite particles as a reinforcing filler. Filler particle...
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