Microparticles applications

Gil S, Jimenez-Boga C, Martin-Campo J, Romero A, ValverdeJL, Sanchez-Silva L. Stabilizer effects on the synthesis of gold-containing microparticles. Application to the liquid phase oxidation of glycerol. J Colloid Interface Sci. 2014 431 105—111. 

New types of ion exchange resins have also been developed to meet the specific needs of high-performance liquid chromatography (HPLC) (Chapter 8). These include pellicular resins and microparticle packings (e.g. the Aminex-type resins produced by Bio-Rad). A review of the care, use and application of the various ion exchange packings available for HPLC is given in Ref. 19. 

The aim of this chapter is to summarize some of the research findings on xylan, a natural polymer extracted from corn cobs, which presents a promising application in the development of colon-specific drug carriers. Physicochemical characterization of the polymer regarding particle size and morphology, composition, rheology, thermal behavior, and crystallinity will be provided. Additionally, research data on its extraction and the development of microparticles based on xylan and prepared by different methods will also be presented and discussed. 

Ngomsik, A.F., Bee, A., Draye, M., Cote, G. and and Cabuil, V. (2005) Magnetic nano- and microparticles for metal removal and environmental applications a review. Comptes Rendus Chimie, 8, 963-970. 

In this set of experiments, we avoided the formation of halloysite aggregates by working with diluted dispersions but microparticle formation through polycation bridging may also be useful for halloysite applications. 

Axelrod D, Hellen EH, Fulbight RM (1992) Microparticle fluorescence. In Lakowicz JR (ed) Topics in fluorescence spectroscopy, vol 3, Biochemical applications. Plenum, New York, pp 289-343... 

Yang, W. C., Yu, A. M., and Chen, H. Y. (2001). Applications of a copper microparticle-modified carbon fiber microdisk array electrode for the simultaneous determination of aminoglycoside antibiotics by capillary electrophoresis. /. Chromatogr. A 905, 309—318. 

Lipid microparticles and nanopellets for oral use were first described by Speiser [11]. Nanopellets are prepared by dispersing melted lipids with high-speed mixers or via ultrasound techniques. Lipospheres developed by Domb are also prepared from dispersed lipids by stirring and sonication [12]. These preparations may contain a high degree of microparticles, which thus excludes an intravenous injection. For other routes of application (e.g., peroral administration), these microparticles might not be a serious problem. Furthermore, the dispersions may be contaminated by metal shed. With optimized conditions, however, mean particles sizes of 1(X) to 200 nm are possible [13]. 

Another application of microparticle technology is the production of polymeric microspheres, which are usually produced by emulsion polymerization techniques. But a variety of polymer colloids can be made by aerosol techniques (Partch et al, 1983 Nakamura et al, 1984 Partch et al, 1985). One advantage of the aerosol route is that larger sizes can be attained... 

Other applications of microparticles include spray drying, stack gas scrubbing, particle and droplet combustion, catalytic conversion of gases, fog formation, and nucleation. The removal of SO2 formed in the combustion of high-sulfur coal can be accomplished by adding limestone to coal in a fluidized bed combustor. The formation of CaO leads to the reaction... 

There are important applications when charge-loss is either desired or is unavoidable. One example is that of a radioactive microparticle or a particle exposed to a radioactive gas. Davis et al. (1988) and Ward et al. (1989) showed... 

There has been much less work done in the area of microparticle chemistry compared with studies of the physics of small particles, but this is an area of considerable interest to chemical engineers. The work of Matijevic and his colleagues on polymeric aerosols and of Rubel and Gentry on gas/droplet reactions was mentioned earlier, as was the application of fluorophores by Ward et al. (1987) to explore microparticle polymerization. The recent development of microparticle spectroscopic techniques makes it possible to follow chemical reactions between a reactive gas and a microparticle. 

The studies of Tallin and Buehler indicate that microparticle spectroscopic techniques can be used to follow gas/microparticle chemical reactions. The use of morphological resonances to determine the refractive index of a reacting droplet has limited applicability because there must be a unique relationship between composition and refractive index to allow the method to be used to follow chemical reactions. Raman spectroscopy has broader applications, but one must deal with morphological resonances if droplets are... 

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