(n.) A carpentry obstruction, stockade, or other obstacle made in a passage in order to stop an enemy.
(n.) A fortress or fortified town, on the frontier of a country, commanding an avenue of approach.
(n.) A fence or railing to mark the limits of a place, or to keep back a crowd.
(n.) An any obstruction; anything which hinders approach or attack.
(n.) Any limit or boundary; a line of separation.
Example Sentences:
(1) Here we have asked whether protection from blood-borne antigens afforded by the blood-brain barrier is related to the lack of MHC expression.
(2) We conclude that chloramphenicol resistance encoded by Tn1696 is due to a permeability barrier and hypothesize that the gene from P. aeruginosa may share a common ancestral origin with these genes from other gram-negative organisms.
(3) The findings clearly reveal that only the Sertoli-Sertoli junctional site forms a restrictive barrier.
(4) This suggests that a physiological mechanism exists which can increase the barrier pressure to gastrooesophageal reflux during periods of active secretion of the stomach, as occurs in digestion.
(5) Comparison of the 50% binding concentrations of the compounds for the various PBPs of the five strains with their antibacterial activity indicates that the different antibiotics are excluded to a greater or lesser degree by the outer membrane permeability barrier and that the exclusion is most pronounced in P. aeruginosa.
(6) Preservation of dopaminergic and H1 neurotransmission, probably within the blood barrier, is needed to allow the neuroendocrine transduction of cholinergic inputs, whereas the role of 5-HT neurotransmission remains uncertain.
(7) Their levels in urine are a useful indicator of the integrity of membrane barriers of the kidney glomerular capillary wall.
(8) The IgG index (formula: see text) corrects for the influence of serum protein abnormalities as well as a bloodbrain barrier damage and is, therefore, a better measure for the presence of an IgG elevation in CSF due to IgG synthesis, when compared with other IgG quotients commonly used.
(9) In the far east is the arid, depressed country leading down Hell’s Canyon, which bottoms out at the Snake River, which the wolves crossed when they moved from Idaho, and which they now treat more as a crosswalk than a barrier.
(10) No signs of the blood-brain barrier disruption were observed.
(11) Although no anatomical 'barrier' has been described, it has been suggested that the gel mucus and epithelial phospholipids are constituents.
(12) Despite their wide dispersion, Vmax and the stereological determinations correlated strongly at 2 mo of age, confirming that Vmax is a robust indicator of the surface area of the air-blood barrier.
(13) Developmental changes are delineated, with particular reference to recent work on the ovine blood-brain barrier.
(14) Features of barrier island physiography and ecology were studied relative to selective bait deployment and site biosecurity.
(15) This study sought to determine if and why barriers to the over-the-counter purchase of syringes in the St. Louis metropolitan area might exist, given that no ordinance prohibits such a sale there.
(16) It is suggested that the intercalated disc functioned as a barrier to the freezing process.
(17) To explain some of these results a theoretical model is presented to demonstrate that while short circuiting can block the passive ionic movement, it will cause an increase in the energy consumption of the system and introduce certain important changes in the ionic barriers and e.m.fs.
(18) Our results show that paramagnetic enhancement with T1-weighted imaging adds specificity and enables rapid assessment of abnormalities of the blood-brain barrier.
(19) A functional impairment of the amino acid transport systems at the level of the blood-brain barrier seems to play a crucial role in causing deleterious modifications of the synaptic neurotransmission in the central nervous system.
(20) There was a significant correlation between the lesion index and the PD reduction, although the integrity of the resting gastric mucosal barrier remained unaltered.
Partition
Definition:
(v.) The act of parting or dividing; the state of being parted; separation; division; distribution; as, the partition of a kingdom.
(v.) That which divides or separates; that by which different things, or distinct parts of the same thing, are separated; separating boundary; dividing line or space; specifically, an interior wall dividing one part or apartment of a house, an inclosure, or the like, from another; as, a brick partition; lath and plaster partitions.
(v.) A part divided off by walls; an apartment; a compartment.
(v.) The servance of common or undivided interests, particularly in real estate. It may be effected by consent of parties, or by compulsion of law.
(v.) A score.
(v. t.) To divide into parts or shares; to divide and distribute; as, to partition an estate among various heirs.
(v. t.) To divide into distinct parts by lines, walls, etc.; as, to partition a house.
Example Sentences:
(1) The relative rates of reduction of several spin-labeled molecules that partition differently across the hy-drophobic-interface of inner membranes from rat liver mitochondria were investigated.
(2) Isoprenylated proteins were enriched in the detergent phase upon partition with the non-ionic detergent Triton X-114.
(3) This provides unequivocal evidence that partitioning is the dominant form of retention for small nonpolar solutes.
(4) Folch extraction and partition followed by silicic acid column chromatography revealed the antigens to be glycolipids.
(5) The volume changes of the respiratory system were partitioned using an inductance plethysmograph.
(6) Equilibrium-partitioning measurements indicate that the relative affinities of different probes for PC-rich vesicles, in competition with HODMA or DOTAP vesicles, increase with increasing hydrogen-bonding capacity of the probe headgroup in the order PC less than N,N-dimethyl PE less than N-methyl PE less than PE approximately phosphatidyl-2-amino-1-propanol.
(7) The partition ratio of 2.0 obtained for the reaction with L 658758 approaches that of an optimal inhibitor.
(8) In addition, our data suggest that part of the difference may reside in differential partitioning of lipid into lysosomes.
(9) Changing the partition of the load on the femoral surface and the permeability at the tibial surface changes the time-dependent response, but has little effect on the strain distributions at times of the order of 5 s considered in this study.
(10) This symmetry, with respect to the sign of the charge, indicates that discreteness-of-charge effects are not significant in determining the potential-sensitive phase partitioning of these probes in model membranes.
(11) At pH 7.0, acrylamide partitions between the bulk aqueous phase and the proteins, human serum albumin, monellin and ovalbumin.
(12) Two-phase systems consisting of water, dextran and poly(ethylene glycol) have been used for partition of membranes obtained from Torpedo marmorata electric organ.
(13) P61 is solubilized by Triton X-114 treatment of membranes and partitions into the detergent phase upon warming.
(14) It was founded in 1984 by Hussain, a former Chicago cab driver, and won broad support among the "mohajirs" - Muslims who fled India after partition in 1947.
(15) The history of the relationship of biological activity to partition coefficient and related properties is briefly reviewed.
(16) Triton X-114 solubilized material from both the virulent and attenuated strains, which partitioned into the hydrophobic, detergent phase, contained LLS and major proteins of 41 and 44 kDa, which were also immunoprecipitable from intact organisms.
(17) This may lead to large errors in pathological tissue because the partition coefficient changes significantly in brain tumors.
(18) Experimental data are presented for: (a) the flux of diflorasone diacetate through hairless mouse skin, (b) the percutaneous penetration profile of propylene glycol, (c) the effects of vehicle concentrations of polyoxypropylene 15 stearyl ether and propylene glycol on the percutaneous flux of diflorasone diacetate, (d) skin--vehicle partition coefficients of diflorasone diacetate, (e) the solubility profile of diflorasone diacetate as a function of solvent concentration, and (f) the alteration of the skin's resistance to the penetration of diflorasone diacetate due to propylene glycol.
(19) Our present results thus provide parameters for the separation of cells by partition in addition to or instead of membrane charge depending on the polymer and salt composition and concentration selected.
(20) A methanol-aqueous KCl extraction is used, followed by cleanup with clarifying agents and partition into chloroform.