Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.
Related to microparticle: Endothelial microparticles


1. A very small particle, especially one that can pass through a filter of specified fineness.
2. A vesicle, ranging in size from 5 to 100 mcm, released from the membrane of a cell into the circulation. Microparticles are immunologically unique to their cells of origin and may play a role in antigen presentation. Increased numbers of certain kinds of microparticle may be found in the circulation in vascular and thrombotic disorders.
[micro- + particle]
Farlex Partner Medical Dictionary © Farlex 2012


(mī″krō-part′ĭ-kĕl) [ micro- + particle],


1. A microscopic particle.
2. A fragment of cytoplasm and cell membrane, released into the circulation when the cell is injured.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Surface tannin content: Surface tannin (ST) was estimated as the amount of un-trapped ATE in the microparticles. Briefly, starch microparticles (200 mg) were dispersed in 20 mL of an ethanol:methanol solution (1:1) and filtered through a 0.22 pm Millipore filter membrane while for gum arabic/maltodextrin matrix, 200 mg of microparticles was severally washed with a total of 45 mL anhydrous ethanol, filtered and the filtrate made to 50 mL mark with distilled water.
Waibel disclosed that she has served on the advisory board for Sebacia, which developed the gold microparticles, and has received clinical trials funding from the company.
Microparticles were defined as particles < 1.0 [micro]m in size and positive or negative to Annexin V and their cell origin as described above (Figure 1).
The inactivated virus sample was used for entrapment in chitosan microparticles.
The functional groups of Ker microparticles were analyzed by Fourier transform infrared (FTIR) spectroscopy (Perkin Elmer-Spectrum Gx, USA) in the spectral region of 4000-400 [cm.sup.-1] at 4 [cm.sup.-1] spectral resolution and 32 scans with air as reference.
Jimenez et al., "High levels of circulating endothelial microparticles in patients with acute coronary syndromes," American Heart Journal, vol.
Levels of platelet-derived microparticles and soluble P-selectin can be used as novel early diagnostic marker of acute myocardial infarction.
Mn[O.sub.2] microparticles (figure 1) used in this research were purchased from MERCK Company, Germany.
In quantum mechanics, momentum of microparticles p=mv, where m and v are respectively, the rest mass and the speed of the microparticles, with its wavelength [lambda] associated by de Broglie relation (p=h/[lambda]) [4].
Iwasaka, "Increased level of oxidized LDL-dependent monocyte-derived microparticles in acute coronary syndrome," Thrombosis and Haemostasis, vol.
With microparticle delivery systems, the particles encapsulating the active ingredients lay on top of the nonwoven.
However, specialists recorded insignificant excess of the norm for suspended particles of RM-2.5 (air pollutant, which consists of solid microparticles and the smallest drops of liquids) at night and in the morning.