percolation


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.

percolation

 [per″ko-la´shun]
the extraction of soluble parts of a drug by passing a solvent liquid through it.

per·co·la·tion

(per'kō-lā'shŭn),
1. Synonym(s): filtration
2. Extraction of the soluble portion of a solid mixture by passing a solvent liquid through it.
3. Passage of saliva or other fluids into the interface between tooth structure and restoration; sometimes induced by thermal changes.
[L. percolatio, fr. per- + col, to strain]

percolation

/per·co·la·tion/ (per″kah-la´shun) the extraction of soluble parts of a drug by passing a solvent liquid through it.

percolation

[pur′kəlā′shən]
Etymology: L, percolare, to strain
1 the act of filtering any liquid through a porous medium.
2 (in pharmacology) the removal of the soluble parts of a crude drug by passing a liquid solvent through it.

per·co·la·tion

(pĕr'kŏ-lā'shŭn)
1. Synonym(s): filtration.
2. Extraction of the soluble portion of a solid mixture by passing a solvent liquid through it.
3. Passage of saliva or other fluids into the interface between tooth structure and restoration; sometimes induced by thermal changes.
[L. percolatio, fr. per- + colo, to strain]

percolation (perˈ·k·lāˑ·shn),

n a method for extracting essential oils from aromatic plant materials that strongly resembles steam distillation. As part of the process, a generator above the aromatic plant material produces steam. The steam then trickles down into the aromatic plant material, and the steam and oil are collected in the exact method used in steam distillation. This process is quicker and less complex than steam distillation. Also called
hydro-diffusion. See also steam distillation.
Enlarge picture
Percussion hammer.

per·co·la·tion

(pĕr'kŏ-lā'shŭn)
1. Passage of saliva or other fluids into interface between tooth structure and restoration.
2. Synonym(s): filtration.
[L. percolatio, fr. per- + col, to strain]

percolation,

n an extraction of the soluble parts of a drug by causing a liquid solvent to flow slowly through it.

percolation

the extraction of soluble parts of a drug by passing a solvent liquid through it.
References in periodicals archive ?
Water rights for operation of aquifers as reservoirs are challenging to navigate; water conveyance infrastructure has limited capacity; regional planning to capture river flood waters may be difficult to organize; fields with high percolation rates at the surface may be underlain by low-percolation layers that slow or block the recharge of deeper aquifers; it can be difficult to assess how much capacity a given aquifer has to store banked groundwater; certain crops and certain stages of crop growth do not tolerate flooded conditions; and the quality of water recharged to an aquifer via agricultural land may be degraded due to excessive leaching of contaminants from soil such as pesticides and nitrates.
As explained above, most efforts towards understanding mixtures of conductive materials dispersed in insulating polymers are based on percolation theory.
After preparing and presoaking the hole, the percolation test was conducted using the standard procedure described by the Pennsylvania Department of Environmental Protection (Fritton et al.
For two-scale simulations, it is interesting to estimate the percolation threshold of the smaller scale objects, keeping constant the volume fraction of the other objects (exclusion in the present case).
Based on this the water content, [theta]', at which the accessible pore space forms an unblocked network and percolation can take place can be found by setting the mean path of separation, [chi], in Eqn 2 equal to the average separation length, [L.
Hence, considering the uncertainties regarding the IR polymer degradation and crosslinking during mixing and testing, a percolation threshold of 11 vol.
While a few example applications (determination of w/c and degree of hydration, assessment of percolation, computation of physical properties) have been discussed and presented in this paper, it is likely that other uses for this three-dimensional data will be discovered and implemented over time.
Figure 3 depicts the percolation curve (DC conductivity) of the solution-mixed samples.
Generally, the salinity of rainwater is less than that of applied water, and in California deep percolation and leaching of root zone salinity occur during the winter rainy season, when ET rates are generally low.
They cover pattern, process, and scale, aggregation and segregation; random walks and mobile entities; percolation and growth; representing time and space; model uncertainty and evaluation; and weaving it all together.
Its morphology and low level of defects facilitate percolation at lower additive levels than with conventional MW-CNTs, resulting in minimal negative impact on the polymers' inherent properties, the company says.
Clients are looking for innovative solutions to demands placed on them by external influences and are intrigued by the methods utilized by Blue Ocean Pharma and its operating companies: Percolation Communications LLC, i.