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particlesize; particlesize distribution, etc ; surface area; Show all 3 Subject
Abstract:
... Group C particles possess great potential in gas-phase catalytic reactions due to the large specific surface area. This work focuses on the effects of particle size distribution (PSD), average particle diameter, and addition of nano-additive on the flowability and fluidization quality of Group C and Group A powders. Virgin Group C powders are hard to fluidize, but with the so-called nano-modulatio ...
particlesize; particlesize distribution, etc ; mechanical properties; models; soil; technology; Show all 6 Subjects
Abstract:
... Breakage-induced evolution of particle size distribution (PSD) will greatly affect the mechanical behavior of granular materials, and has been an important concern in geotechnical engineering. This paper presents a breakage matrix approach to investigate the evolution of PSD with detailed breakage information of each single-sized particles via conducting one-dimensional compression tests on dyed c ...
particlesize; particlesize distribution, etc ; analytical chemistry; calibration; nanogold; uncertainty; Show all 6 Subjects
Abstract:
... Single particle inductively coupled plasma-mass spectrometry (spICP-MS) is an emerging technique that is capable of simultaneous measurement of the size and number concentration of metal-containing nanoparticles (NPs) at environmentally relevant levels. Although spICP-MS is widely applied to different fields, challenges remain in obtaining accurate and consistent particle number concentration (PNC ...
particlesize; particlesize distribution, etc ; angle of repose; equations; glass; technology; Show all 6 Subjects
Abstract:
... The angle of repose, angle of tilting, and Hausner ratio are frequently used to estimate the flowability of a particulate material. Also, the free and tapped densities are commonly used for design and operating of particulate solids handling systems. In this study, these properties were determined for mono-sized, binary mixtures and particle size distributions of spherical glass. It was found, as ...
particlesize; particlesize distribution, etc ; algorithms; carbon dioxide; cement; production technology; Show all 6 Subjects
Abstract:
... We present a novel demonstration of in-situ particle size measurement in a high-temperature, industrial-scale reactor for lime-calcination using micro-focusing particle shadowgraphy in particle-laden flows with volume fraction up to 0.02 and an optical path length of 670 mm. This non-intrusive method was demonstrated to provide reliable in-situ measurement of both particle size distribution (PSD) ...
particlesize; particlesize distribution, etc ; equations; glass; hydrology; mathematical models; permeability; porosity; Show all 8 Subjects
Abstract:
... In this paper, the numerical simulation based on the lattice Boltzmann method (LBM) and experimental studies are conducted to investigate the permeability of porous media with sphere packing. The accuracy of LBM is verified through the comparison of theoretical solutions and the numerical result of flat channel flows. The resolution and the size of representative element volume used for simulation ...
particlesize, etc ; X-ray diffraction; X-ray photoelectron spectroscopy; active oxygen species; catalytic activity; desorption; oxidation; oxygen; temperature; transmission electron microscopy; China; Show all 11 Subjects
Abstract:
... PdAg/Al₂O₃ were pretreated by CO and H₂ reduction pretreatments, respectively. The reduced catalysts were tested for HCHO and CO oxidation and characterized by Brunner Emmet Teller (BET), X-ray diffraction (XRD), transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS) and oxygen temperature programmed desorption (O₂-TPD). These results indicate that the pretreatments have ef ...
particlesize; particlesize distribution, etc ; ampicillin; bioavailability; crystallization; process design; sonication; ultrasonic treatment; ultrasonics; Show all 9 Subjects
Abstract:
... Ampicillin trihydrate (AT) is a widely used antibiotic and it is of utmost importance to control the particle size distribution, mean size, and morphology so as to achieve faster dissolution and enhanced bioavailability. In present work, ultrasound-assisted cooling crystallization of ampicillin trihydrate was studied with an objective to understand the effect of various ultrasonic parameters like ...
... The stability of a colloidal dispersion has long been expressed in terms of the stability ratio. Based on the available theories of coagulation of colloidal dispersions, a novel expression, complying with the classical definition, is developed for the stability ratio. It accounts for the contributions of both primary and secondary minimum coagulations to the overall rate of coagulations. In additi ...
... This study investigates the mixing of granular materials for rotating drums of different volumes which vary from 6.28 L to 402.12 L. Two groups of case studies are considered: Group I (constant particle diameter, d) and Group II (constant ratio of drum diameter to particle diameter, D/d). The results show that for Group I, the mixing performance deteriorates with drum size increasing. A correlatio ...
particlesize; particlesize distribution, etc ; environment; flow cytometry; irradiation; marine debris; nanoplastics; polyethylene; polypropylenes; polystyrenes; risk; Show all 11 Subjects
Abstract:
... The generation of small fragments from the environmental ageing of microplastics (MPs) is still a poorly known process. This work addresses the fragmentation of MPs obtained from marine debris consisting of polyethylene and polypropylene (PE and PP in environmental mixture) and polystyrene (PS) after exposure to accelerated ageing by irradiation and mechanical stirring. Number particle size distri ...
... Nascent particles of ultrahigh-molecular-weight polyethylene (UHMWPE) with different entangled states and particle sizes have been processed by means of sintering. The chain entanglement formation of the sintered UHMWPE was investigated using a small-amplitude oscillatory shear measurement, where the contribution of the initially entangled state and particle size to the entanglement formation of l ...
... Effective thermal conductivities (ETCs) of five commonly used metal powders in additive manufacturing have been measured at temperatures up to 750 °C. The ETCs of Al-Mn-Sc and Ti-6Al-4V powders with different particle sizes are also investigated. When the temperature is lower than 300 °C, the ETC of metal powders is insensitive to the temperature and material. In contrast, when the temperature exc ...
... This study aims to determine the one-step synthesis of lead zirconate titanate (PbZr₍₁₋ₓ₎TiₓO₃; PZT) particles, using a solid-state reaction method. These particles were synthesized at x of 0.48, using a solid-state reaction (SSR) method at various operating temperatures of 700–1000 °C. Before the reaction in a muffle furnace, the precursor powder was shaker milled for 2 h. The structural analysis ...
... Granular blended fertilizers are commonly applied using spinner disc spreaders in the U.S. with recent advances including wider spreads. Today, uniformity of spread is important as growers and custom applicators attempt to implement site-specific management and utilize global navigation satellite systems (GNSS)-based guidance systems which permit equipment to follow the same field traverses over t ...
particlesize distribution, etc ; manufacturing; nanomaterials; Show all 3 Subjects
Abstract:
... Nanomaterial is defined a natural, incidental or manufactured material containing particles, in an unbound state, as an aggregate, or as an agglomerate, and where, for 50% or more of the particles in the number size distribution, one or more external dimensions is in the size range 1–100 nm [...] ...
... Structural color─optical response due to light diffraction or scattering from submicrometer-scale structures─is a promising means for sustainable coloration. To expand the functionality of structural color, we introduce discoidal shape anisotropy into colloidal particles and characterize how structural color reflection can be engineered. Uniaxial compression of spheres is used to prepare discoids ...
particlesize, etc ; compression strength; thermodynamics; Show all 3 Subjects
Abstract:
... In order to study the effects of different SiC mass ratios, SiC particle sizes and Al particle sizes on the mechanical response of Al/PTFE/SiC, an experiment was conducted through the full 2³ factorial design. The specimens were prepared by means of molding-vacuum sintering, while the mechanical response of the materials was measured through quasi-static compression. The regression models between ...
particlesize; particlesize distribution, etc ; absorption; animal models; body temperature; drugs; humans; microparticles; polymers; porosity; rabbits; viscosity; Show all 12 Subjects
Abstract:
... Development of Level A in vitro-in vivo correlations (IVIVCs) remains challenging for complex long-acting parenterals, such as poly(lactic-co-glycolic acid) PLGA microspheres. The nature of the PLGA polymer excipient has a dominant influence on the performance of PLGA microspheres. These microsphere systems typically exhibit multiphasic in vitro/in vivo release/absorption characteristics and may a ...
... Soy hull pectic polysaccharide (SHPP) is a kind of biological macromolecule prepared from soy hull, which has certain thickening and gel properties. In present study, SHPP was extracted with citric acid and sodium citrate from soybean hulls under the assistance of microwave, respectively. SHPPs were then compared with commercial pectin polysaccharide to test their emulsification ability. The emuls ...