What's the difference between barrier and limit?

Barrier


Definition:

  • (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.

Limit


Definition:

  • (v. t.) That which terminates, circumscribes, restrains, or confines; the bound, border, or edge; the utmost extent; as, the limit of a walk, of a town, of a country; the limits of human knowledge or endeavor.
  • (v. t.) The space or thing defined by limits.
  • (v. t.) That which terminates a period of time; hence, the period itself; the full time or extent.
  • (v. t.) A restriction; a check; a curb; a hindrance.
  • (v. t.) A determining feature; a distinguishing characteristic; a differentia.
  • (v. t.) A determinate quantity, to which a variable one continually approaches, and may differ from it by less than any given difference, but to which, under the law of variation, the variable can never become exactly equivalent.
  • (v. t.) To apply a limit to, or set a limit for; to terminate, circumscribe, or restrict, by a limit or limits; as, to limit the acreage of a crop; to limit the issue of paper money; to limit one's ambitions or aspirations; to limit the meaning of a word.
  • (v. i.) To beg, or to exercise functions, within a certain limited region; as, a limiting friar.

Example Sentences:

  • (1) Serum levels of both dihydralazine and metabolites were very low and particularly below the detection limit.
  • (2) This should not be a serious limitation to the application of the RIA in the detection of venous thrombosis.
  • (3) The rise of malaria despite of control measures involves several factors: the house spraying is no more accepted by a large percentage of house holders and the alternative larviciding has only a limited efficacy; the houses of American Indians have no walls to be sprayed; there is a continuous introduction of parasites by migrants.
  • (4) Increased infusion flow rate did not increase the limiting frequency.
  • (5) The extent of the infectious process was limited, however, because the life span of the cultures was not significantly shortened, the yields of infectious virus per immunofluorescent cell were at all times low, and most infected cells contained only a few well-delineated small masses of antigen, suggestive of an abortive infection.
  • (6) Limited biopsic retroperitoneal lymphnode dissection subsequently extended following the result of the frozen section histology.
  • (7) In addition, the fact that microheterogeneity may occur without limit in the mannans of the strains suggests that antibodies with unlimited diverse specificities are produced directed against these antigenic varieties as well.
  • (8) The specific limited trypsinolysis of bacteriophage T7 RNA polymerase (T7RP) was performed in the presence of various components of the polymerase reaction and some GTP-analogs--irreversible inhibitors of the enzyme.
  • (9) This postulate is supported by a limited study of the serovars present among the isolates.
  • (10) Breast reconstruction should not be limited to the requiring patients, but should represent, in selected cases with favourable prognosis, an integrative and complementary procedure of the treatment.
  • (11) As increases to the Isa allowance are based on the CPI inflation figure for the year to the previous September, the new data suggests the current Isa limit of £15,240 will remain unchanged next year.
  • (12) Conditions for limited digestion of the heterodimer by subtilisin, removing only the carboxyl terminus, were determined.
  • (13) Furthermore the limit between hearing aid fitting an cochlear implantation is discussed.
  • (14) Comprehensive regulations are being developed to limit human exposure to contamination in drinking water by the United States Environmental Protection Agency (EPA) under the authority of the Safe Drinking Water Act (SDWA).
  • (15) Direct limiting effects of hypothermia on tissue O2 delivery and muscle oxidative metabolism as well as vasoconstriction and arteriovenous shunting associated with CPB procedures are likely to be involved in the above mentioned alterations of cell metabolism.
  • (16) Their disadvantages - the expensive equipment and the time-consuming procedure respectively - limit their widespread use.
  • (17) The lower limit (LL) of CBF autoregulation was calculated by a computerized program and tested for different factors for correction of the PaCO2-induced changes in CBF.
  • (18) Immunochemical techniques, in particular ELISA are available for only a very limited number of NM (e.g.
  • (19) Only one E. coli strain, containing two plasmids that encode endo-pectate lyases, exo-pectate lyase, and endo-polygalacturonase, caused limited maceration.
  • (20) Initiation of the alternative pathway by the cryptococcal capsule is characterized by a lag in C3 accumulation and the appearance of a limited number of focal initiation sites which resemble those observed when the alternative pathway is activated by zymosan and nonencapsulated cryptococci.