(v. t.) To cause to pass through fine interstices, as a liquor; to filter; to strain.
(v. i.) To pass through fine interstices; to filter; as, water percolates through porous stone.
Example Sentences:
(1) As soon as the component with the lower mechanical stability is percolating the powder system, tablet hardness is controlled entirely by this component.
(2) This group consisted of 101 cases of whom 38 underwent semen treatment with Centrifugation on a Discontinuous Percoll Gradient (CDPG) and 63 with Pellet Swim-up (PS); the control group was made up of 31 normospermic patients where the semen was treated by PS.
(3) The attempt to fractionate the testicular cells by centrifugation in the continuous and discontinuous Percoll gradient was undertaken.
(4) The platelet subpopulations were separated with discontinuous gradients of Percoll.
(5) By using Percoll discontinuous density gradient centrifugation, peripheral blood nonphagocytic and nonadherent mononuclear cells were divided into the low and high density fractions for which natural killer (NK) cells and T cells were enriched, respectively.
(6) We conclude that both localized memory and percolation are possible in stimulatory idiotypic networks.
(7) The effect of activated PMN was tested on the motility of Percoll-washed spermatozoa in the presence and absence of reactive oxygen species scavengers or seminal plasma (whole or fractionated).
(8) To cope with this problem, in 27 IVF cycles, sperm selection was performed by centrifugation on discontinuous Percoll density gradient.
(9) Thirdly, the discontinuous percoll density gradient centrifugation was used to separate P. carinii cysts.
(10) Fractionation by Percoll density centrifugation of peripheral blood leucocyte cells, from atopic subjects with seasonal hay fever, unmasked IgE-B cell populations whose individual capacities to synthesize IgE in vitro were obscured in cultures of unfractionated B cells.
(11) Inspection of the cavity margins revealed absence of percolation at the dentin margins.
(12) In general, IEL of satisfactory yield and of good viability were obtained with EDTA treatment of the gut tissues, followed by rapid passages of the resultant cells through nylon-wool columns and centrifugation on two-step Percoll density gradients (45% and 80%).
(13) Basolateral membranes obtained by self-orienting Percoll-gradient centrifugation were treated with 5 mM CaCl2 to minimize the cross-contamination by brush border membranes.
(14) Percoll-purified high density small lymphocytes had little or no migratory capacity under these conditions, requiring a longer incubation time (4 hr) for consistent migration.
(15) Guinea pig marrow cell suspensions were first enriched for megakaryocytes by density equilibrium centrifugation in continuous Percoll density gradients.
(16) Using Percoll density gradient centrifugation, 1,25(OH)2D3 receptors could be localized in the basal cell fraction.
(17) After introduction of erythrocyte targets, there was a 20- to 30-min delay before initiation of phagocytosis that was not observed with monocytes prepared by the standard Percoll-gradient technique.
(18) To accomplish this, blood was obtained from patients with ragweed AR, granulocytes were isolated and fractionated by continuous density Percoll gradients, and the density distribution of these cells was determined after centrifugation.
(19) A cellular compartment from brown adipose tissue (BAT) of newborn rats was isolated by Percoll-density-gradient centrifugation and was shown to proliferate and to undergo adipose conversion in vitro in primary culture.
(20) Collagenase-dispersed cells from human chorion laeve were examined on Percoll gradients.
Silt
Definition:
(n.) Mud or fine earth deposited from running or standing water.
(v. t.) To choke, fill, or obstruct with silt or mud.
(v. i.) To flow through crevices; to percolate.
Example Sentences:
(1) Corthine said he had told Cameron 3m tonnes of silt needed to be removed from the Parrett to get it flowing properly again.
(2) Adsorption and movement of carbofuran (a systemic nematicide) were studied using two Indian soils (clay loam and silt loam) of alluvial origin.
(3) Residue content of water samples is normally one-tenth to one-hundredth that of silt, but is much higher during periods of heavy runoff.
(4) Dredging creates turbidity in the water that reduces the amount of light reaching the coral, affecting photosynthesis, while silt that settles on the coral interferes with its ability to feed itself.
(5) As the silt cleared, we found ourselves on a flat plain of yellow-tinged mud, inscribed with pits, burrows and tracks by species that eke out their existence on the detritus that settles from above.
(6) Dam reservoirs trap silt, which decreases their storage capacity and reduces power generation.
(7) Treated seeds were also planted in pots containing Nile silt for testing the efficiency of rhizobia as affected by the fungicide and the pelleting treatments.
(8) The larval lamprey is a filter-feeder who dwells in the silt of freshwater streams and the adult is an active predator found in large lakes or the sea.
(9) At Pelican Island, a 2.5 mile strip in the Barataria Bay, crews used 2.5m cubic yards of sand and silt mined from the Gulf of Mexico to build dunes and marshes, and rolled out protective fences around newly planted grasses.
(10) Their dams slow rivers down, reducing scouring and erosion, and improve water quality by holding back silt.
(11) Before the dam the closure was enforced for about 40 days, during which the canals were closed and dried up, and the silt deposited on their beds during the Nile flood dredged out together with the snails and aquatic weeds.
(12) The Davis family benefited when a group of locals shifted 15 tons of sand and silt from their garden.
(13) Equilibrium adsorption coefficient (K) values measured using a batch-slurry technique follows the order clay loam greater than silt loam soil.
(14) Only 2% of what is flowing through the sewers is sewage; the rest is water and accumulated debris – the vast amount of water you flush down the toilet and all the water and silt that seeps into the sewers when it rains.
(15) The soil is so called "Terra Roxa" (red soil) and in its physicochemical composition there is a great amount of iron oxides, silica (silt, agril laceous material), aluminium, manganese, organic compounds.
(16) The use of the selective media with gentamicin for plating out silt substrates containing mainly Micromonospora had practically no effect on the increase in the number of the Micromonospora cultures grown.
(17) The flood cycles passed on the salts that accumulated from evaporation and passed new layers of silt onto the farmlands around the marshes.
(18) Once you have started dredging, "it must be repeated after every extreme flood, as the river silts up again".
(19) "A silt fence ensures that mud down deep doesn't seep through," said Hidehiko Nishiyama, Japan's spokesman on nuclear safety.
(20) It was shown that Micromonospora predominated in moist soils and especially in such substrates as silts where their content with respect to the all actinomycetous isolates amounted to 88.9 per cent.