Results 221 to 230 of about 122,799 (260)

Enhancement of the Ionic Conductivity in Solid‐Solid‐Dispersions by Surface Induced Defects

Berichte der Bunsengesellschaft für physikalische Chemie, 1984
AbstractThe finding that dispersions of insulators such as alumina or silica in ionic conductors may exhibit considerably enhanced ionic conductivities compared to the pure material, has become a promising topic for optimizing the electric properties in solid state research.
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Development of Nifedipine Amorphous Solid Dispersion Composed of Surface-Active Agents

Key Engineering Materials, 2021
The amorphous solid dispersions (ASDs) containing amino methacrylate copolymer and surface-active agents were prepared to improve the nifedipine (NDP) dissolution. The different types of surface-active agent i.e., polysorbates 80, sodium lauryl sulfate (SLS) and polyethylene glycol (PEG) 400 were used. In order to evaluate the ASDs formulation,powder X-
Sukannika Tubtimsri, Yotsanan Weerapol
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Alternative Solvent-Free Preparation Methods for Felodipine Surface Solid Dispersions

Drug Development and Industrial Pharmacy, 1998
Surface solid dispersions were prepared via physical mixture and were either heated in a vacuum dryer or in a microwave oven for different periods of time. The physical state of felodipine in solid dispersions was studied using differential scanning calorimetry and x-ray powder diffractometry.
J, Kerc, S, Srcic, B, Kofler
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Photonic Control of Surface Anchoring on Solid Colloids Dispersed in Liquid Crystals

Langmuir, 2011
The anchoring of liquid-crystal (LC) mesogens to the surfaces of colloids is an important factor in determining intercolloidal interactions and the symmetry of the ensuing colloidal assembly in nematic colloids. The dynamic control of surface anchoring could therefore provide a handle to tune the colloidal organization and resulting properties in these
Chandran, S. Prathap, Mondiot, F., Mondain-Monval, O., Loudet, J-C., Mondain-Monval, Olivier   +4 more
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Reflectance Spectroscopy as a Tool for Investigating Dispersed Solids and Their Surfaces

Catalysis Reviews, 1968
Abstract Reflectance spectroscopy is potentially one of the most powerful experimental techniques to gain information on the electronic structure of the components of heterogeneous dispersed systems and their external as well as internal surfaces, including adsorbed layers.
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Dispersion-Polar Surface Tension Properties of Organic Solids

The Journal of Adhesion, 1970
ABSTRACT A new definition for work of adhesion Wa is applied to computationally define the dispersion γs d and polar γs d components of the solid surface tension γs = γs d + γs d for twenty-five low energy substrates. These calculated surface properties are correlated with surface composition and structure.
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Surface Roughness Effects with Solid Lubricants Dispersed in Mineral Oils

A S L E Transactions, 1984
The lubricating effectiveness of solid-lubricant dispersions are investigated in both point and line contacts using surfaces with both random and directional roughness characteristics. Friction and wear data obtained at relatively low speeds and at room temperature, indicate that the existence of solid lubricants such as graphite, MoS2, and PTFE in a ...
C. Cusano, P. R. Goglia, H. E. Sliney
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Solid Fluctuations and Dispersion in Liquid-Solid Fluidized Beds With Low Surface Tension Media

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2011
Fluctuations and dispersion of solid particles were investigated in a liquid-solid fluidized bed of which diameter was 0.102 m and 2.5 m in height. Effects of liquid velocity (0.005 ∼ 0.13 m/s), particle size (0.5 ∼ 3.0 × 10−3 m) and surface tension of continuous liquid media (56 ∼ 72 × 10−3 N/m) on the fluctuation frequency and dispersion coefficient ...
H. O. Lim, M. J. Seo, Y. Kang, K. W. Jun
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Wetting of Solids by Surface Active Agents: Dispersion and the Polar Surface Tension Components

1986
Wetting of solids bу various surfactant solutions was investigated by the contact angle measurements. The results were analyzed using an approximation that the surfactant solutions have intrinsic dispersion (D) and polar (P) surface forces, analogous to solids and pure liquids. Using this approach gave the same value for the solid surface tension (i. e.
K. S. Birdi, E. H. Stenby
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Surface Enrichment and Depletion of the Active Ingredient in Spray Dried Amorphous Solid Dispersions

Pharmaceutical Research, 2018
To study the effects of physicochemical properties of drug and polymer, as well as the drug-polymer interactions, on the surface composition of SDDs.Ethanol solutions containing a model drug (IMC, NMP or FCZ) and a model polymer (PVPK12, PVPK30 or PVP-VA) were spray dried, and the surface composition of SDDs was analyzed by XPS. The surface tensions of
Zhen, Chen, Kuan, Yang, Chengbin, Huang, Alan, Zhu, Lian, Yu, Feng, Qian   +5 more
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