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  • particles
  • Dual-emissive nanoarchitecture of lanthanide-complex-modified silica particles for in vivo ratiometric time-gated luminescence imaging of hypochlorous acid †Electronic supplementary information (ESI) available: Characterization of the new compounds, Fig. S1-S12 and a video showing the real-time uptake and accumulation of HClO in living Daphnia magna using the RTLNP as a probe. (pubmedcentralcanada.ca)
  • The process involves conversion of monomers into a colloidal solution (sol) that acts as the precursor for an integrated network (or gel) of either discrete particles or network polymers. (wikipedia.org)
  • In this chemical procedure, the "sol" (or solution) gradually evolves towards the formation of a gel-like diphasic system containing both a liquid phase and solid phase whose morphologies range from discrete particles to continuous polymer networks. (wikipedia.org)
  • In the case of the colloid, the volume fraction of particles (or particle density) may be so low that a significant amount of fluid may need to be removed initially for the gel-like properties to be recognized. (wikipedia.org)
  • The Stöber process is a chemical process used to prepare silica (SiO 2) particles of controllable and uniform size for applications in materials science. (wikipedia.org)
  • The reaction produces silica particles with diameters ranging from 50 to 2000 nm, depending on conditions. (wikipedia.org)
  • In 1999 a two-stage modification was reported that allowed the controlled formation of silica particles with small holes. (wikipedia.org)
  • nanoparticles
  • We have developed a ratiometric time-gated luminescence sensory system for in vivo imaging of hypochlorous acid (HClO) by preparing a dual-emissive nanoarchitecture of europium- and terbium-complex-modified silica nanoparticles. (pubmedcentralcanada.ca)
  • Therefore, the β-diketonate-Eu 3+ complex was decorated on the surface of the silica nanoparticles for responding to HClO, while a HClO-insensitive luminescent terbium complex was immobilized in the inner solid core of the nanoparticles to serve as an internal standard. (pubmedcentralcanada.ca)
  • It was pioneering when it was reported by Werner Stöber and his team in 1968, and remains today the most widely used wet chemistry synthetic approach to silica nanoparticles. (wikipedia.org)
  • widely
  • Trans fat, or trans-unsaturated fatty acids, trans fatty acids, are a type of unsaturated fat that occur in small amounts in nature, but became widely produced industrially from vegetable fats for use in margarine, snack food, packaged baked goods, and frying fast food starting in the 1950s. (wikipedia.org)
  • monoliths
  • The interest in sol-gel processing can be traced back in the mid-1800s with the observation that the hydrolysis of tetraethyl orthosilicate (TEOS) under acidic conditions led to the formation of SiO2 in the form of fibers and monoliths. (wikipedia.org)
  • particle
  • Silica produced using the Stöber process is an ideal material to serve as a model for studying colloid phenomena because of the monodispersity (uniformity) of its particle sizes. (wikipedia.org)
  • technique
  • The sol-gel approach is a cheap and low-temperature technique that allows the fine control of the product's chemical composition. (wikipedia.org)
  • The sol-gel process is a wet-chemical technique used for the fabrication of both glassy and ceramic materials. (wikipedia.org)
  • Chromatography technique developed substantially as a result of the work of Archer John Porter Martin and Richard Laurence Millington Synge during the 1940s and 1950s, for which they won the 1952 Nobel Prize in Chemistry. (wikipedia.org)
  • method
  • 11. A method of stimulating the motility of the gastro-intestinal system which comprises the systemic administration to vertebrates of an effective gastro-intestinal motility stimulating amount of a compound as described in claim 1, the pharmaceutically acceptable acid addition salts thereof, the stereochemically isomeric forms, and the pharmaceutically acceptable quaternary ammonium salts thereof. (google.com)
  • In materials science, the sol-gel process is a method for producing solid materials from small molecules. (wikipedia.org)
  • small
  • The mass spectrometry of the 9.53 peak shows small amounts of vanillin (FW = 152.15). (issuu.com)
  • To run a thin layer chromatography plate, the following procedure is carried out: Using a capillary, a small spot of solution containing the sample is applied to a plate, about 1.5 centimeters from the bottom edge. (wikipedia.org)
  • Very small amounts of H2S, SF6, and probably any other sulfur containing gases, cause immediate and complete deactivation of the catalyst. (wikipedia.org)
  • known
  • Inject a sample containing known amounts of CH4, CO and CO2 to check conversion efficiency and peak shape. (wikipedia.org)
  • Highly effective thermal insulators known as aerogels can also be prepared using Stöber methods, and Stöber techniques have been applied to prepare non-silica aerogel systems. (wikipedia.org)
  • solid
  • In this process, the sol (or solution) evolves gradually towards the formation of a gel-like network containing both a liquid phase and a solid phase. (wikipedia.org)
  • process
  • Plates can be labeled before or after the chromatography process using a pencil or other implement that will not interfere or react with the process. (wikipedia.org)
  • Sol-gel research grew to be so important that in the 1990s more than 35,000 papers were published worldwide on the process. (wikipedia.org)
  • NASA has prepared silica aerogels with a Stöber-process approach for both the Mars Pathfinder and Stardust missions. (wikipedia.org)
  • The Stöber process is a sol-gel approach to preparing monodisperse (uniform) spherical silica (SiO 2) materials that was developed by a team led by Werner Stöber and reported in 1968. (wikipedia.org)
  • compound
  • 6. A pharmaceutical composition in unit dosage form comprising per dosage unit an effective gastro-intestinal motility stimulating amount of a compound as described in claim 1, the pharmaceutically acceptable acid addition salts thereof, the stereochemically isomeric forms, and the pharmaceutically acceptable quaternary ammonium salts thereof. (google.com)