(a.) Not permeable; not permitting passage, as of a fluid. through its substance; impervious; impenetrable; as, India rubber is impermeable to water and to air.
Example Sentences:
(1) On the other hand, changing pH on only one side by addition of an impermeant buffer fails to induce any change in n. At the single-channel level, pH had an effect both on the unitary conductance, doubling it in going from pH 4.5 to 8.2, as well as on the fraction of time the channels stay open, F(v).
(2) EAI can penetrate a membrane, whereas IAI is membrane impermeant.
(3) Both the internal and external solutions were prepared with impermeant anions.
(4) Replacement of Cl-o with other impermeant anions, such as gluconate and methylsulphate, had a similar action on contractile activity as for Ise-replacement.
(5) When sulfhydryl groups present at the cell surface were blocked with cell-impermeant sulfhydryl reagent, the initial phase of disulfide cleavage was inhibited, indicating that cleavage began at the cell surface.
(6) To explain the opposite effects of GTP in the absence and presence of oxalate, it is proposed that GTP activates a transmembrane conveyance of Ca2+ between oxalate-permeable and -impermeable compartments.
(7) Measurement of (140)La uptake by the living skin shows that lanthanum moves across the external surface of the skin readily, into and out of a compartment that has a limited capacity and is bounded on its internal side by a barrier impermeable to lanthanum.
(8) When permeant anions in the bath (Cl-) were replaced with relatively impermeant anions (gluconate, MOPS, propionate, or Hepes), the Po vs. voltage relationship was shifted by approximately -35 mV.
(9) Currents through both the voltage-activated potassium channels, IK,V, and the calcium-activated potassium channels, IK,Ca, can be blocked by the membrane-impermeant K channel blocker tetraethylammonium (TEA).
(10) The outcome is a belief that the Earth is being slowly strangled by a gaudy coat of impermeable plastic waste that collects in great floating islands in the world's oceans; clogs up canals and rivers; and is swallowed by animals, birds and sea creatures.
(11) Local hypoxia due to a diffusion block by the impermeable pericapillary cuffs, partially due to a reduction of capillaries in the superficial layers.
(12) The connective hyperpolarizes in the propionate saline, whereas the abdominal region undergoes the transient depolarization that is expected when a permeant anion (Cl) is replaced with an impermeant one (propionate).
(13) In forest, removal of olfactory substances from the human skin, by vigorous washing and application of petroleum jelly, or by wearing impermeable clothing, greatly reduced the numbers of flies attracted.
(14) By the use of double-chamber tissue culture flasks, with the 2 cell populations separated by a cell impermeable membrane, it was found that T-T interaction does not require cell contact and is thus mediated by factor(s).
(15) This discrepancy could be ascribed to impermeability, as E. coli cells with modified permeability show greater sensitivity to minosaminomycin.
(16) The perinephric membrane in the Lepidoptera is impermeable to the dyes.
(17) The relatively membrane-impermeant pyridoxal phosphate labels all proteins of the intact myelin except basic protein.
(18) Monobromobimane and dibromobimane are effective on intact cells while red cell membranes may be impermeable to the positively charged monobromotrimethylammoniobimane, the latter being effective only on lysed cells.
(19) This failure was shown to be due to the impermeability of mycobacteria to these drugs by use of "membrane-active" agents along with the antibiotics in growth inhibition studies.
(20) Chloride dependence was assessed by replacing chloride with the impermeant anion gluconate, or by addition of the anion transport blocker 4,4'-diisothiocyanatostilbene-2,2'-disulfonic acid (DIDS).
Sealed
Definition:
(imp. & p. p.) of Seal
Example Sentences:
(1) To provide a seal with low pressure-high volume cuffed tubes, cuff sizes of 20.5 mm and 27.5 mm are recommended for female and male patients, respectively.
(2) Cermet cement sealings showed defects more frequently.
(3) The channels usually ceased conducting within a few minutes after seal formation with the patch pipette and could not be re-activated with depolarizing voltage steps.
(4) For all the understandable insistence that parliament and London would continue as normal after Wednesday’s terrorist attack, almost 24 hours later a large section of streets around the area remained sealed off by police.
(5) Tone pulses and noise stimuli were mixed acoustically and presented using calibrated, sealed stimulating systems.
(6) In general, after recording a baseline tympanogram, mechanically created positive and negative air pressures are created in a hermetically sealed ear canal causing increased pressure on the middle ear air cushion.
(7) Ecological evidence is considered to suggest that the rapid maturation of C. semerme in rats may also occur when the parasite becomes established in seals.
(8) Increased conversion of 25-OHD to 24,25-(OH)2D and a high capacity for vitamin D storage in their large blubber mass appeared to be factors in the resistance of seals to vitamin D toxicity.
(9) The mechanism of sealed-off perforation of the duct is discussed.
(10) Membranes were sandwiched between two gas-permeable, plastic foils, placed in a sealed cuvette, and gassed with H2 as reductant or O2 as oxidant.
(11) Treatment animals had the anastomoses and graft sealed with a suspension of N-butyl-2-cyanoacrylate and 1.2 g tobramycin powder (antibiotic glue, ANGL) after contamination.
(12) The results demonstrated that, when the coronal half of the root canal filling material was removed immediately after placement with pluggers, there was a loss of the apical seal and leakage in thirteen of twenty teeth.
(13) Ultrastructural study of the Leydig cells of nonbreeding crabeater, leopard and Ross seals showed that three types of cells could be distinguished.
(14) National bans on commercial trading in seal products are already in place in 30 countries including the US, the Netherlands and Italy.
(15) Under these conditions, with careful attention to sealing at ankles and waist, it was possible to estimate penetration as low as 0.3%.
(16) We used transvitreally delivered cyanoacrylate tissue adhesive to seal retinal breaks in 25 selected patients undergoing vitreous surgery for complicated retinal detachment.
(17) To date, numerous products have been evaluated, and many hundreds have received the council's seal of acceptance.
(18) She explained that, as a baby, she had been subjected to female genital mutilation (FGM): her clitoris cut off and her vagina sealed, with only a small hole remaining for urine and menstruation.
(19) After accidental dissection of the thoracic duct in infants, leakage of chyle could be sealed successfully in 6 cases.
(20) These microcapsules can be dried and retain activity when sealed in a jar at 4 degrees C.