Chemodynamics of Soft Nanoparticulate Metal Complexes in Aqueous Media: Basic Theory for Spherical Particles with Homogeneous Spatial Distributions of Sites and Charges

Langmuir ◽  
2011 ◽  
Vol 27 (8) ◽  
pp. 4514-4519 ◽  
Author(s):  
Herman P. van Leeuwen ◽  
Raewyn M. Town ◽  
Jacques Buffle
Keyword(s):  
Metal Complexes ◽  
Aqueous Media ◽  
Basic Theory ◽  
Spherical Particles ◽  
Spatial Distributions

scholarly journals Numerical Analysis of Thermophoresis of a Charged Spheroidal Colloid in Aqueous Media

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 224
Author(s):  
Yi Zhou ◽  
Yang Yang ◽  
Changxing Zhu ◽  
Mingyuan Yang ◽  
Yi Hu
Keyword(s):  
Numerical Analysis ◽  
Aqueous Media ◽  
Concentration Field ◽  
Ion Concentration ◽  
Spherical Particles ◽  
Hydrodynamic Effect ◽  
Oblate Spheroids ◽  
Thermodiffusion Coefficient ◽  
Arbitrary Electric Double Layer ◽  
Dimension Ratio

Thermophoresis of charged colloids in aqueous media has wide applications in biology. Most existing studies of thermophoresis focused on spherical particles, but biological compounds are usually non-spherical. The present paper reports a numerical analysis of the thermophoresis of a charged spheroidal colloid in aqueous media. The model accounts for the strongly coupled temperature field, the flow field, the electric potential field, and the ion concentration field. Numerical simulations revealed that prolate spheroids move faster than spherical particles, and oblate spheroids move slower than spherical particles. For the arbitrary electric double layer (EDL) thickness, the thermodiffusion coefficient of prolate (oblate) spheroids increases (decreases) with the increasing particle’s dimension ratio between the major and minor semiaxes. For the extremely thin EDL case, the hydrodynamic effect is significant, and the thermodiffusion coefficient for prolate (oblate) spheroids converges to a fixed value with the increasing particle’s dimension ratio. For the extremely thick EDL case, the particle curvature’s effect also becomes important, and the increasing (decreasing) rate of thermodiffusion coefficient for prolate (oblate) spheroids is reduced slightly.

Transformation of substituted cinnamic acids using l-cysteine metal complexes in aqueous media

2008 ◽  
Vol 41 (4) ◽  
pp. 429-432 ◽  
Author(s):  
Petra Moravčíková ◽  
Peter Fodran ◽  
Emil Kolek ◽  
Vlasta Brezová
Keyword(s):  
Metal Complexes ◽  
Aqueous Media ◽  
Cinnamic Acids

Alginate Used to Develop Bio-Inspired Composite Microparticles for Bone Regeneration

2015 ◽  
Vol 638 ◽  
pp. 20-26
Author(s):  
Sergiu Cecoltan ◽  
Daniela G. Petre ◽  
Eliza Georgeta Stan ◽  
Eugeniu Vasile ◽  
Horia Emil Cioflan ◽  
...  
Keyword(s):  
Composite Material ◽  
Bone Regeneration ◽  
Divalent Cations ◽  
Aqueous Media ◽  
Organic Matrix ◽  
Hierarchical Organization ◽  
Spherical Particles ◽  
Organic Polymer ◽  
X Ray Diffraction ◽  
Composition Properties

This work describes the synthesis of composite particles for bone regeneration. The developed method is based on a bio-inspired approach starting from the composition, properties and hierarchical organization of bone extracellular matrix (ECM). The composite material was designed as spherical particles able to ensure interconnected porosity through their assembling inside the bone defect. nanohydroxyapatite was generated in the organic matrix in order to mimic the composition and the organization of the mineral phase in bone tissue. A collagen derivative was used as main natural polymer of the organic matrix of the composite material, in order to mimic the composition of bone ECM. Alginate represents the second organic polymer due to its recognized capacity to easily generate spherical particles in divalent cations solutions. The combination of this polysaccharide with the two previously mentioned components simultaneously responds the architectural and compositional constraints of this approach. The particles were obtained using a modular electrostatic bead generator developed in our laboratory. Briefly, a solution containing the biopolymers was extruded into a mineralisation solution. Spherical particles with diameters of about 500 μm were obtained. They were characterised by scanning electron microscopy, X-ray diffraction, stability in aqueous media. The obtained results confirmed the importance of alginate to generate spherical particles and the potential of such materials to successfully serve the targeted application.

scholarly journals Designing boron and metal complexes for fluoride recognition: a computational perspective

2021 ◽  
Vol 23 (39) ◽  
pp. 22768-22778
Author(s):  
Renato Pereira Orenha ◽  
Letícia Bermudes Peixoto ◽  
Giovanni Finoto Caramori ◽  
Maurício Jeomar Piotrowski ◽  
Krys Elly de Araújo Batista ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Metal Complexes ◽  
Human Body ◽  
Aqueous Media ◽  
Computational Perspective

Fluoride anions play important roles in the human body and environment. Thus, DFT calculations have been performed to design structures that can efficiently recognize this ion in aqueous media.

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