median particle diameter

median particle diameter

[′mē·dē·ən ′pärd·ə·kəl dī‚am·əd·ər]
(geology)
The middlemost particle diameter of a rock or sediment, larger than 50% of the diameter in the distribution and smaller than the other 50%.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
(8) (defined by the median particle diameter) for the respective filter design variables in each gravel layer to check the effect of hydrodynamic and Van der Waals attractive forces.
The median particle diameter of the fuel entering the lower row burners increased by 2.5-fold, and the percentage residue [R.sub.200] on the sieve with a grid spacing of 200 [micro]m increased by approximately 1.7 times, indicating increasing percentages of coarse fuel particles as compared to finer particles.
When reducing the boiler load to the minimum (50% of rated load, 160 t/h), an increase in the median particle diameter [[DELTA].sub.m] of the bottom ash and the first fields ESP fly ash was observed.
Only a few inhaled corticosteroid (ICS) products have the requisite median particle diameter (less than 2 mcm) needed to reach the alveolar tissue in the distal tracheobronchial tree, including beclomethasone dipropionate HFA (QVAR), flunisolide HFA (Aerospan), and ciclesonide (Sepracor).
Only a few inhaled corticosteroid (ICS) products possess the requisite median particle diameter (less than 2 mcm) needed to reach alveolar tissue in the distal tracheobronchial tree, including beclomethasone dipropionate HFA (QVAR), flunisolide HFA (Aerospan), and ciclesonide (Sepracor).
Without compatibilizers, the polystyrene had a median particle diameter of 440 nm, mean diameter of 540 nm, and a standard deviation of 390 nm.
The UE3 coals were ultrafine materials with a 9 [mu]m mass median particle diameter and high ash-fusion temperatures.