(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.
Breakwater
Definition:
(n.) Any structure or contrivance, as a mole, or a wall at the mouth of a harbor, to break the force of waves, and afford protection from their violence.
Example Sentences:
(1) The breakwater was ultimately completed after much delay and extra expense.
(2) The beaches are sandy and pleasant for sitting on at low tide, with breakwaters every 100 metres or so that also act as windbreaks.
(3) A meeting meant to reassure Cornish householders over plans for his private company, Shire Oak, to reopen a quarry near the Lizard peninsula to provide rock for the Swansea Bay breakwater, only seemed to reinforce opposition.
(4) Last year alone, the island, not much bigger than a breakwater in the Oslo fjord, played host to visitors from 25 international media organisations, all keen to find out the secret of Nilsen's success.
(5) Reefs also play a crucial role as natural breakwaters, protecting coastlines from storms.
(6) "The collapsed wall has been shored up with material salvaged from the damaged section, a temporary breakwater made of shipping containers filled with waste has been erected off the coast, removal of the damaged platform continues, and work is estimated to be completed by 18 March," he said.
(7) Until the late 1980s, nestled behind the Yan Ma Tei breakwater in Hong Kong's Causeway Bay, you could find tens of thousands of boat-dwellers who formed a bustling, floating district.
(8) Public broadcaster NHK showed images of a large ship ramming into a breakwater in Kennuma city, Miyagi prefecture.
(9) To protect the site, 15 steel containers – weighing around 70 tonnes each – have been installed as temporary breakwater, and a scaffold bridge has been built to reconnect services and signalling equipment.
(10) Global warming, overfishing and human intervention – especially breakwaters that protect sandy beaches but provide a home for larvae – are all blamed.
(11) Chelsea’s Guus Hiddink envious of squad options available to PSG Read more Still, though, at times it was hard to avoid the impression as PSG’s attacks crashed against the Chelsea breakwaters that Ibrahimovic’s best qualities – virtuoso touches, the irresistible imperative that the team play through him – are less likely to unsettle the stronger teams in Europe than they are the routinely terrorised defences of Ligue 1.
(12) Breakwaters that made up the typhoon shelter also limited water circulation, leaving pollution to accumulate in the harbour .
(13) The project, which envisages an area of 11.5 sq km cordoned off by a breakwater, would have an installed capacity of 320MW with an annual output of 420GWh and a design life of 120 years.
(14) A public authority building a breakwater and other harbour facilities at a small seaport (population 3000) had short-term requirements for 261,000 tonnes of rock and ultimately for 1,000,000 tonnes.
(15) The Cornish stone would be used to build a six-mile long breakwater in Swansea amid hopes of generating significant shipping volumes in a newly-created marine conservation zone.
(16) When working to build big cement breakwaters, he slept on top of a container just off the coastal highway.
(17) In 2003 Eitan became logistics manager for a project to extend Ashdod's port breakwater, which is where he drowned.