Critical Mass

(redirected from supercritical)
Also found in: Dictionary, Thesaurus, Financial, Encyclopedia, Wikipedia.
Radiation safety The minimum amount of material—mass of a particular radioisotope—required for it to reach ‘criticality’ and undergo a spontaneous fission chain reaction, releasing a lethal shower of neutron and gamma radiation
Research A popular term for the minimum number of persons working in related fields in a particular place, below which creative thinking and interaction may be suboptimal
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Bacterial number decreased to about 1.7 logs at supercritical C[O.sub.2] and 1.08 logs at sub-supercritical C[O.sub.2] while molds decreased to about 4.88 logs at supercritical C[O.sub.2] and 3.73 logs at sub-supercritical C[O.sub.2].
One-Dimensional Simulation of Quartz Precipitation at Supercritical Conditions.
At the same time, affinity of the impregnating substance may be higher towards the supercritical fluid than to the polymer which may lead to the decrease in impregnation yield [6].
The aim of this work was to study the effects of pressure and temperature on the apparent solubility of allspice essential oil in SC-C[O.sub.2], correlate the experimental apparent solubility data with the modified Chrastil equation, and determine the distribution coefficient, the mean effective diffusion coefficient, the energy of activation, and the thermodynamic properties of the supercritical extraction process.
Studies about supercritical fluid extraction of the alkaloids and amides using carbon dioxide have shown a time of 60 min to obtain an optimal yield of the analytes [19, 23, 25].
Compared to subcritical power plants, supercritical coal-fired power plants operate at higher pressures leading to higher efficiencies and significant reductions in emissions over the expected life of the plant.
According to Amit Paithankar, managing director of Emerson Process Management, India, "Supercritical technologies boost the efficiency of coal-based electricity generation while reducing carbon and other emissions, but the high temperatures and pressures involved make them more challenging to control.
To see what the effects of dioxide on Venus might be, Bolmatov and his colleagues investigated the unusual properties of supercritical matter.
Extractions were performed using Supercritical Fluid Extraction system (Thar Instruments, Inc., USA) which consists of a countercurrent column to extract the sample and a collection vessel to collect the extracted sample, as shown in Figure 4.
Supercritical water rapidly oxidizes any organic substance it comes in contact with- which in other words mean that it burns it.
Supercritical water gasification has recently received significant attention as a potential alternative to energy conversion method [3-6].
Supercritical water (SCW, above 647 K and 22.1 MPa) can provide an excellent reaction environment for hydrothermal synthesis.