(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.
Passage
Definition:
(v. i.) The act of passing; transit from one place to another; movement from point to point; a going by, over, across, or through; as, the passage of a man or a carriage; the passage of a ship or a bird; the passage of light; the passage of fluids through the pores or channels of the body.
(v. i.) Transit by means of conveyance; journey, as by water, carriage, car, or the like; travel; right, liberty, or means, of passing; conveyance.
(v. i.) Price paid for the liberty to pass; fare; as, to pay one's passage.
(v. i.) Removal from life; decease; departure; death.
(v. i.) Way; road; path; channel or course through or by which one passes; way of exit or entrance; way of access or transit. Hence, a common avenue to various apartments in a building; a hall; a corridor.
(v. i.) A continuous course, process, or progress; a connected or continuous series; as, the passage of time.
(v. i.) A separate part of a course, process, or series; an occurrence; an incident; an act or deed.
(v. i.) A particular portion constituting a part of something continuous; esp., a portion of a book, speech, or musical composition; a paragraph; a clause.
(v. i.) Reception; currency.
(v. i.) A pass or en encounter; as, a passage at arms.
(v. i.) A movement or an evacuation of the bowels.
(v. i.) In parliamentary proceedings: (a) The course of a proposition (bill, resolution, etc.) through the several stages of consideration and action; as, during its passage through Congress the bill was amended in both Houses. (b) The advancement of a bill or other proposition from one stage to another by an affirmative vote; esp., the final affirmative action of the body upon a proposition; hence, adoption; enactment; as, the passage of the bill to its third reading was delayed.
Example Sentences:
(1) Release of 51Cr was apparently a function of immune thymus-derived lymphocytes (T cells) because it was abrogated by prior incubation of spleen cells with anti-thymus antiserum and complement but was undiminished by passage of spleen cells through nylon-wool columns.
(2) Exposure to nanomolar concentrations of saralasin, an Ang II agonist, attenuated the passage of the fluorophores across the monolayers by 50-75%.
(3) Cultured cells from fourth to ninth passage showed positive labelling for S 100 protein, carbonic anydrase (CAA), glutamine synthetase (GS), alpha cristallin (alpha C) and polyclonal glial fibrillary acidic protein (GFAP) antibody, but were negative for both monoclonal GFAP antibody and also for Muller cells in the retina.
(4) In the case of the latter, it show either a more or less typical appearance of radicolography only or, more rarely, a picture which combines opacification of the epidural space with the subarachnoid passage of the contrast medium.
(5) After approximately 20 in vitro passages, Chinese hamster kidney (CHK) cell cultures transformed upon exposure to different strains of SV 40 can show a diploid modal chromosome number of 22 with chromosome counts exclusively or essentially in the diploid range (20-25).
(6) In late-passage and cloned HUT102 cells, an increase in HTLV production was concordant with a decrease in constitutive interferon production and the loss of mature T lymphocyte antigens.
(7) A reduction of salmonellae during the passage of the pump and pressure conduit-pipe, combining east- and west-side of Kiel fjord, could be seen.
(8) The resulting cell lines have a stable phenotype and retain the changes which result from transformation even after extended passaging.
(9) Abe’s longstanding efforts toward those goals, which include the successful passage of a state secrets act and efforts to expand the scope of Japan’s military activities have already damaged relations with China.
(10) It is inferred that in this experimental model (1) high-density lipoproteins are probably excreted in the glomerular filtrate, (2) alterations in the composition of the excreted lipoproteins may occur during their passage through the nephron.
(11) We report that kainic acid lesions of the posterior corpus striatum, which preferentially spare fibers of passage while destroying striatopallidal neurons, produce a stimulus-sensitive movement pattern in rats that has a highly specific sensory trigger.
(12) The cells have been maintained through 23 serial passages, and the modal number of chromosomes was calculated to be 55.
(13) The rate of passage of digesta was significantly reduced in both pair-fed control (50 per cent) and infected (74 per cent) groups.
(14) Unlike cells grown on plastic, RME cells grown on type I collagen were readily subculturable and serial subculture resulted in the cells undergoing 15-20 population doublings (5-6 passages) before exhibiting any loss of growth potential.
(15) The major difficulty encountered with the current technique is the danger of neurologic injury during the passage and handling of conventional wires, especially in extensive procedures.
(16) In addition, SPT16 is identical to CDC68, a gene previously shown to be required for passage through the cell cycle control point START.
(17) Selective catheterisation enabled opacification under pressure in more than 80 p. cent of cases, with perfect visualisation of the entire tubes and significant peritoneal passage.
(18) The effects of Urocalun and jumping exercise upon the passage of calculi were studied.
(19) The alterations in the glycosaminoglycans and collagen induced by hypoxia may cause changes in the passage of macromolecules through the aortic wall.
(20) Despite the lack of expression of the endogenous CYP17 gene in transfectants from late-passage cells, induced luciferase activity was higher in late-passage transfectants than early-passage transfectants for both the -2544 and -488 constructs.