What's the difference between boundary and junction?

Boundary


Definition:

  • (n.) That which indicates or fixes a limit or extent, or marks a bound, as of a territory; a bounding or separating line; a real or imaginary limit.

Example Sentences:

  • (1) Patients with papillary carcinoma with a good cell-mediated immune response occurred with much lower infiltration of the tumor boundary with lymphocyte whereas the follicular carcinoma less cell-mediated immunity was associated with dense lymphocytic infiltration, suggesting the biological relevance of lymphocytic infiltration may be different for the two histologic variants.
  • (2) In contrast, boundary layer diffusion is operative in the release from the matrixes prepared by compression of physical mixtures.
  • (3) The review will now be delayed for five years, leaving the next election to be fought on the existing constituency boundaries, and seriously damaging David Cameron's chances of winning an overall majority in 2015.
  • (4) In Europe such escapees often find themselves recaptured by boundary adjustments.
  • (5) This gene was previously shown to have a DNase I- and S1-sensitive site for which the boundaries varied with the cell cycle, and we have now precisely mapped these modifications.
  • (6) Past measurements have shown that the intensity range is reduced at the extremes of the F0 range, that there is a gradual upward tilt of the high- and low-intensity boundaries with increasing F0, and that a ripple exists at the boundaries.
  • (7) The problem, however, is that this scale of economic planning and management is entirely outside the boundaries of our reigning ideology.
  • (8) His first ball reaches Ali at hip height and he flicks him to fine leg for a boundary that takes him to a quite epic century.
  • (9) Upon estimation of 5' and 3' boundaries, a 497 base stretch of homology with the TOP1 mRNA was found.
  • (10) Responses above the associated boundary decreased stimulus intensity, responses below the associated boundary increased stimulus intensity.
  • (11) The position of the sedimenting boundary can be observed at any time during the run, and up to six 'photographs' can be recorded for subsequent analysis.
  • (12) If figurative language is defined as involving intentional violation of conceptual boundaries in order to highlight some correspondence, one must be sure that children credited with that competence have (1) the metacognitive and metalinguistic abilities to understand at least some of the implications of such language (Lakoff & Johnson, 1980; Nelson, 1974; Nelson & Nelson, 1978), (2) a conceptual organization that entails the purportedly violated conceptual boundaries (Lange, 1978), and (3) some notion of metaphoric tension as well as ground.
  • (13) First, chains are constrained by their inability to penetrate the boundary.
  • (14) Within the developing CNS of mouse embryos the anterior boundaries of expression are specific for each gene.
  • (15) Cities and counties across the US have also passed laws that prohibit such performances from occurring within their boundaries.
  • (16) The rate of forward patch movement was generally greater at positions further behind the boundary.
  • (17) He said the proposals had been directed at seats that have not changed hands for many years, but said with the redrawing of the constituency boundaries required by David Cameron's desire to cut the number of constituencies no safe seats as previously defined would exist.
  • (18) A line iterative technique is described to solve numerically the resulting coupled system of nonlinear partial differential equations with physiologically relevant boundary and entrance conditions.
  • (19) Many Iranian women are already pushing the boundaries , and observers in Tehran say women who drive with their headscarves resting on their shoulders are becoming a familiar sight.
  • (20) And then, as the Guardian revealed at the weekend, there is the potentially devastating effect of the boundary changes, which can’t really be brought in before an early election but will radically tilt the field by 2020.

Junction


Definition:

  • (n.) The act of joining, or the state of being joined; union; combination; coalition; as, the junction of two armies or detachments; the junction of paths.
  • (n.) The place or point of union, meeting, or junction; specifically, the place where two or more lines of railway meet or cross.

Example Sentences:

  • (1) The findings clearly reveal that only the Sertoli-Sertoli junctional site forms a restrictive barrier.
  • (2) Thus adrenaline, via pre- and post-junctional adrenoceptors, may contribute to enhanced vascular smooth muscle contraction, which most likely is sensitized by the elevated intracellular calcium concentration.
  • (3) Linear and annular gap junctions between neighbouring cells were present, particularly in Group 1.
  • (4) The family comprises at least three variable (V) gene segments, three constant (C) gene segments, and three junction (J) gene segments.
  • (5) Intraepidermal clefting starts at the junction between the basal and epidermal layers, and later involves all of the levels of the stratum spinosum.
  • (6) The actions of the polyvalent cationic dye Ruthenium Red and the enzyme neuraminidase were studied at the frog neuromuscular junction.
  • (7) Circular muscle strips from the opossum esophageal body obtained 3-5 cm above the esophagogastric junction were suspended in organ baths for measurement of isometric tension.
  • (8) There is approximately a 25% decrease in aggregation from regions of the rib distal to the metaphyseal-growth plate junction (69%) to the region proximal to it (50%).
  • (9) Whereas the tight junctions of endoneurial capillaries are known to prevent certain blood-borne substances from entering the endoneurium, it was not clear whether the permeability of the pulpal capillaries, which are distant from the nerve fibres, could affect the nerve fibre environment.
  • (10) In contrast, newly formed secondary myotubes are short cells which insert solely into the primary myotubes by a series of complex interdigitating folds along which adhering junctions occur.
  • (11) The junctional currents were already constant 1 ms after step changes in the junctional voltage; this was three orders of magnitude faster than the other known examples of voltage-controlled gap junctions between embryonic cells.
  • (12) Three cases of simultaneous atrial and a-v junctional tachycardia, related to the administration of digitalis and occurring in a short period of 16 months, are reported.
  • (13) In junctions, 3' PSS termini are preserved by fill-in DNA synthesis, although their 5' recessed ends cannot serve as a primer.
  • (14) It is therefore suggested that salt water adaptation triggers a cellular reorganization of the epithelium in such a way that leaky junctions (a low resistance pathway) appear at the apex of the chloride cells.
  • (15) At the adult neuromuscular junction, acetylcholine (ACh) receptors are highly localized at the subsynaptic membrane, whereas, embryonic myotubes before innervation have receptors distributed over the entire surface.
  • (16) The normal anatomical position of the point of junction of the superficial cerebral veins with the superior sagittal and transverse sinuses of the rat was studied with an analytical mathematical method.
  • (17) Histological examination showed that in many cases these terminal sprouts appeared to reinnervate abandoned junctional sites on adjacent denervated fibers.
  • (18) In vivo, the ability of an AChR clustering stimulus to depress cluster formation elsewhere on the muscle cell may influence both the site at which the neuromuscular junction develops as well as which axons survive during synapse elimination.
  • (19) Immunofluorescence and immunoelectronmicroscopy experiments demonstrated that while tight junctions demarcate PAS-O distribution in confluent cultures, apical polarity could be established at low culture densities when cells could not form tight junctions with neighboring cells.
  • (20) PTH, an inducer of shape change, did not affect the number of gap junctions appreciably.