(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.
Roadblock
Definition:
Example Sentences:
(1) "Today a federal district court put up a roadblock on a path constructed by 21 federal court rulings over the last year – a path that inevitably leads to nationwide marriage equality," said Sarah Warbelow, legal director for the Human Rights Campaign.
(2) They marched to the police roadblock, and performed a 21-gun salute for a fallen veteran and a prayer ceremony on the bridge.
(3) There's an advantage from the Democratic perspective to waiting for the House, however: doing so could eliminate some of the procedural roadblocks that extremist members might otherwise erect, reports Sahil Kapur Talking Points Memo: Sahil Kapur (@sahilkapur) Senate Ds are hoping House passes *something* on DL so they can use it as a vehicle to bypass stalling by Cruz et al.
(4) Although Rutaganda stood alone in the dock, the entire interahamwe was on trial with him for its role in mobilising large numbers of Hutus to murder about 800,000 Tutsis at roadblocks, in churches and in their own homes.
(5) One woman who gave testimony to the committee, Radia Atta, told the Guardian that her husband, Ayman Issa, disappeared after being held at a military roadblock near the pyramids of Dahshour.
(6) The US has also pledged $86m towards upgrading Mexico’s checkpoints, roadblocks and naval bases.
(7) However there are already signs that Isis has switched tactics to minimise its exposure by reducing roadblocks, the use of pick-up trucks and by placing its black flags in civilian areas.
(8) The P2P holiday rentals marketplace is hitting roadblocks in Europe, too: the authorities in Amsterdam and Berlin, for example, are reportedly considering laws that will make it tougher for companies such as Airbnb and its European rivals HouseTrip , Wimdu and 9flats to operate.
(9) Cameron claims that this only carries on what Tony Blair and Alan Milburn began – until roadblocked by Gordon Brown.
(10) The Palestinian comedy team Watan a Watar have enjoyed huge success with their take on an Isis propaganda video featuring a roadblock and a quiz: incorrect answers mean instant execution but these jolly, bumbling jihadis win points to get them to Paradise.
(11) The Coalition is facing a similar Senate roadblock on the planned $7 GP co-payment, with Labor, the Greens and the PUP voicing strong opposition to the proposal amid fears it could deter some people from seeing a doctor.
(12) Hatir says the fighters hail from units from Tripoli, Misrata, Benghazi, Tobruk and Bani Walid itself, but they have no dealings with the official national army, an anaemic force staffed by former Gaddafi-era officials which is, perhaps wisely, keeping well out of the way, manning a few roadblocks to the north.
(13) In this study we have tried to analyse roadblocks to the implementation of the program.
(14) The article also discusses roadblocks to learning faced by hearing-impaired students who have difficulty comprehending question forms, especially WH-question forms.
(15) General Batista issued orders for the setting up of roadblocks around Havana and the taking over of the international airport to prevent members of the Government from leaving the country.
(16) Despite state and federal evacuation orders , a government roadblock, escalating police violence and aggressive prosecutions that attorneys say lack basic evidence, thousands of veterans are preparing to travel to Cannon Ball this weekend to support the growing movement to stop the Dakota Access pipeline.
(17) Established 17 years ago as a compromise between the then president, Bill Clinton, and a resistant Pentagon, the "don't ask, don't tell" policy became for gay rights campaigners a notorious roadblock on the way to full acceptance.
(18) During the 100-day massacres, Nizeyimana is said to have ordered the erection of roadblocks where Tutsis were stopped and killed, and is accused of personally sanctioning the killings of entire Tutsi families on account of their ethnicity.
(19) Asked about a report that he had appeared at roadblocks alongside the death squads, he said it was an insult to a man of his rank.
(20) "If I'm checking IDs at roadblocks, knowing that person is going to be clubbed to death, I'm as responsible as if I wielded the machete myself," said Capin.