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a mixture with properties between those of a solution and fine suspension

PrepTutorEJDIC

にわか質の,ころいど性の / コロイド,膠(こう)質

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1. 肝腺腫 hepatic adenoma
2. 成人における重症循環血液量減少または循環血液量減少性ショックの治療 treatment of severe hypovolemia or hypovolemic shock in adults
3. 雷鳴頭痛 thunderclap headache
4. 小児における先天性および後天性の甲状腺腫 congenital and acquired goiter in children
5. まれな脳腫瘍 uncommon brain tumors

English Journal

Effective interaction between large colloidal particles immersed in a bidisperse suspension of short-ranged attractive colloids.

Jamnik A.Author information Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, SI-1001 Ljubljana, Slovenia. andrej.jamnik@fkkt.uni-lj.siAbstractThe effective force between two large hard spheres mimicking lyophobic colloids (solute) immersed in an asymmetric two-component mixture of smaller particles (solvents), interacting via Baxter's sticky hard sphere (SHS) potential, was studied using integral equation theory and Monte Carlo simulation. The theoretical predictions were calculated from the analytic solution of the Percus-Yevick/Ornstein-Zernike integral equation for spatial correlations in a three-component mixture at vanishing solute concentration, while the simulation results were obtained by applying a special simulation technique developed for sampling the hard-sphere collision force. Due to layering of the solvent molecules, the effective force between the particles of the solute oscillates with periods equal to the molecular diameters of both solvent components. The attractive force between the solute particles in the SHS mixture comprising strongly attractive molecules of either component decays slower than that in the mixture with weaker interparticle attraction. Similar features are also observed when inspecting the separate contributions of individual components to the total solute-solute force. At sufficient strength of the interparticle stickiness, these oscillations disappear, the force becoming long ranged and attractive at all separations.
The Journal of chemical physics.J Chem Phys.2009 Oct 28;131(16):164111. doi: 10.1063/1.3253694.
The effective force between two large hard spheres mimicking lyophobic colloids (solute) immersed in an asymmetric two-component mixture of smaller particles (solvents), interacting via Baxter's sticky hard sphere (SHS) potential, was studied using integral equation theory and Monte Carlo simulation
PMID 19894931

One-pot method for build-up nanoporous super oil-repellent films.

Darmanin T1, Guittard F.Author information 1Université de Nice-Sophia Antipolis CNRS, Laboratoire Chimie des Matériaux Organiques et Métalliques EA3155, Equipe Chimie Organique aux Interfaces, ICN, Parc Valrose, 06108 Nice cedex 2, France.AbstractThe aim of this work was to demonstrate the possibility of obtaining super-surfaces, i.e. superoleophobic and as a consequence superhydrophobic properties, from electrodeposited conductive polymer. From original structure containing a fluorinated chain grafted to 3,4-ethylenedioxypyrrole (EDOP) core, we report the characterization of the electrochemical properties of polymer films as well as the morphology (SEM) and wettability against probe liquids (water, diiodomethane, hexadecane). The exceptional oil-repellent properties, quickly obtained and in one step, are in correlation with the nanoporous structures of the films which is of great interest in the development of lyophobic materials based on the fluorophobic effect.
Journal of colloid and interface science.J Colloid Interface Sci.2009 Jul 1;335(1):146-9. doi: 10.1016/j.jcis.2009.03.073. Epub 2009 Apr 5.
The aim of this work was to demonstrate the possibility of obtaining super-surfaces, i.e. superoleophobic and as a consequence superhydrophobic properties, from electrodeposited conductive polymer. From original structure containing a fluorinated chain grafted to 3,4-ethylenedioxypyrrole (EDOP) core
PMID 19414183

Surface modification of magnetic nanoparticles capped by oleic acids: characterization and colloidal stability in polar solvents.

Lee SY1, Harris MT.Author information 1School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.AbstractThe lyophobic surface of monodisperse magnetic nanoparticles capped by oleic acid was made to be more lyophilic by ozonolysis to increase the stability of the suspension in polar solvents like ethanol. The ozone oxidatively cleaved the double bond of oleic acid to form carbonyl and carboxyl groups on the surface of the nanoparticles. Additionally, interfacial ligand exchange of the capping molecules was applied to make the hydrophobic particle surface more hydrophilic. The magnetic particles showed enhanced miscibility and short-term stability in water after interfacial ligand exchange. The structure changes of the capping molecules on the nanoparticle surfaces were investigated using Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). From these spectroscopy studies, the cleavage of the oleic acid and the formations of the carboxyl and carbonyl groups on the particle surface were confirmed. The shape and the magnetic properties of the nanoparticles were maintained after the surface modification. Ozonolysis is an effective method in modifying the lyophobic surface of the magnetic nanoparticles.
Journal of colloid and interface science.J Colloid Interface Sci.2006 Jan 15;293(2):401-8. Epub 2005 Jul 28.
The lyophobic surface of monodisperse magnetic nanoparticles capped by oleic acid was made to be more lyophilic by ozonolysis to increase the stability of the suspension in polar solvents like ethanol. The ozone oxidatively cleaved the double bond of oleic acid to form carbonyl and carboxyl groups o
PMID 16054635

Japanese Journal

471 圧縮コイルばね有無を用いた自動車の懸架装置用コロイダルダンパーに関する実験的研究

スウーチュークラウデュヴァレンティン,井崎宏史,森崎大介,野中隆広
Dynamics & Design Conference 2009, "471-1"-"471-6", 2009-08-03
… On the other hand, in the case of a colloidal damper, since the liquid is forced to penetrate the nanopores of lyophobic silica during compression but naturally exudes on the liquid-repellent surfaces at decompression, the restoring force is intrinsically achieved, and the helical spring can be omitted. …
NAID 110008087536

Novel Principle of Mechanical Energy Dissipation : Part 2-Dynamic Performances of Colloidal Damper

Suciu Claudiu Valentin,Iwatsubo Takuzo
JSME international journal. Series C, Mechanical systems, machine elements and manufacturing 47(1), 189-198, 2004-03-15
… water is considered as associated lyophobic liquid. …
NAID 110004820726

Novel Principle of Mechanical Energy Dissipation : Part 1-Static Performances of Colloidal Damper

Suciu Claudiu Valentin,Iwatsubo Takuzo,Deki Shigehito
JSME international journal. Series C, Mechanical systems, machine elements and manufacturing 47(1), 180-188, 2004-03-15
… Particularly for CD, the hydraulic oil is replaced by a colloidal suspension, which is consisted of a mesoporous matrix and a lyophobic fluid. …
NAID 110004820725