scholarly journals Mechanisms that control the adsorption–desorption behavior of phosphate on magnetite nanoparticles: the role of particle size and surface chemistry characteristics

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2378-2388 ◽  
Author(s):  
Lei Hou ◽  
Qibin Liang ◽  
Fang Wang
Keyword(s):  
Particle Size ◽  
Surface Chemistry ◽  
Surface Properties ◽  
Magnetite Nanoparticles ◽  
Magnetite Particles ◽  
Adsorption Desorption

Both the particle size and surface properties are shown to determine the adsorption of phosphate to magnetite particles.

scholarly journals Effect of the polymeric coating over Fe3O4 particles used for magnetic separation

2010 ◽  
Vol 8 (5) ◽  
pp. 1041-1046 ◽  
Author(s):  
Raúl Reza ◽  
Carlos Martínez Pérez ◽  
Claudia Rodríguez González ◽  
Humberto Romero ◽  
Perla García Casillas
Keyword(s):  
Particle Size ◽  
Magnetite Nanoparticles ◽  
Average Particle Size ◽  
Spherical Shape ◽  
Polymeric Coating ◽  
Average Particle ◽  
Synthesis Conditions ◽  
Aging Conditions ◽  
Magnetite Particles ◽  
Average Size

AbstractIn this work, the synthesis of magnetite nanoparticles by two variant chemical coprecipitation methods that involve reflux and aging conditions was investigated. The influence of the synthesis conditions on particle size, morphology, magnetic properties and protein adsorption were studied. The synthesized magnetite nanoparticles showed a spherical shape with an average particle size directly influenced by the synthesis technique. Particles of average size 27 nm and 200 nm were obtained. When the coprecipitation method was used without reflux and aging, the smallest particles were obtained. Magnetite nanoparticles obtained from both methods exhibited a superparamagnetic behavior and their saturation magnetization was particle size dependent. Values of 67 and 78 emu g−1 were obtained for the 27 nm and 200 nm magnetite particles, respectively. The nanoparticles were coated with silica, aminosilane, and silica-aminosilane shell. The influence of the coating on protein absorption was studied using Bovine Serum Albumin (BSA) protein.

The role of surface properties in CO2 methanation over carbon-supported Ni catalysts and their promotion by Fe

2020 ◽  
Vol 10 (21) ◽  
pp. 7217-7225 ◽  
Author(s):  
Liliana P. L. Gonçalves ◽  
Juliana P. S. Sousa ◽  
O. Salomé G. P. Soares ◽  
Oleksandr Bondarchuk ◽  
Oleg I. Lebedev ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Surface Chemistry ◽  
Surface Properties ◽  
Ni Catalysts ◽  
Co2 Methanation ◽  
Supported Ni Catalysts ◽  
Improved Performance ◽  
Enhanced Surface ◽  
Supported Ni

CO2 methanation over activated carbon-supported Ni catalysts with enhanced surface chemistry properties and their improved performance by Fe promotion.

The role of soil surface properties on the particle size and carbon selectivity of interrill erosion in agricultural landscapes

CATENA ◽  
2017 ◽  
Vol 153 ◽  
pp. 194-206 ◽  
Author(s):  
Alexander J. Koiter ◽  
Philip N. Owens ◽  
Ellen L. Petticrew ◽  
David A. Lobb
Keyword(s):  
Particle Size ◽  
Surface Properties ◽  
Soil Surface ◽  
Agricultural Landscapes ◽  
Interrill Erosion

Fibrin Formation: The Role of the Fibrinogen-Fibrin Monomer Complex

1976 ◽  
Vol 36 (01) ◽  
pp. 037-048 ◽  
Author(s):  
Eric P. Brass ◽  
Walter B. Forman ◽  
Robert V. Edwards ◽  
Olgierd Lindan
Keyword(s):  
Particle Size ◽  
Induction Period ◽  
Fibrin Clot ◽  
Clot Formation ◽  
Appreciable Amount ◽  
Buffer System ◽  
Homeostatic Mechanism ◽  
Fibrin Formation ◽  
Fibrin Monomer

SummaryThe process of fibrin formation using highly purified fibrinogen and thrombin was studied using laser fluctuation spectroscopy, a method that rapidly determines particle size in a solution. Two periods in fibrin clot formation were noted: an induction period during which no fibrin polymerization occurred and a period of rapid increase in particle size. Direct measurement of fibrin monomer polymerization and fibrinopeptide release showed no evidence of an induction period. These observations were best explained by a kinetic model for fibrin clot formation incorporating a reversible fibrinogen-fibrin monomer complex. In this model, the complex serves as a buffer system during the earliest phase of fibrin formation. This prevents the accumulation of free polymerizable fibrin monomer until an appreciable amount of fibrinogen has reacted with thrombin, at which point the fibrin monomer level rises rapidly and polymerization proceeds. Clinically, the complex may be a homeostatic mechanism preventing pathological clotting during periods of elevated fibrinogen.

Photoluminescence behavior of silicon nanocrystals: Role of surface chemistry and size

2008 ◽  
Author(s):  
Anoop Gupta ◽  
Folarin Erogbogbo ◽  
Mark T. Swihart ◽  
Hartmut Wiggers
Keyword(s):  
Surface Chemistry ◽  
Silicon Nanocrystals ◽  
Photoluminescence Behavior
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