(n.) A pearly substance which lines the interior of many shells, and is most perfect in the mother-of-pearl. [Written also nacker and naker.] See Pearl, and Mother-of-pearl.
Example Sentences:
(1) When nacreous shell produced by the marine oyster Pinctada maxima, used as a biomaterial in oral surgery, is implanted in human bone, new bone formation occurs, resulting in a tight welding of the bone to the nacre [16].
(2) Dilute suspensions of normal erythrocytes exhibit a pearl-like sheen (nacre) when subjected to flow.
(3) Nacre implanted in vivo in bone is osteogenic suggesting that it may possess factor(s) which stimulate bone formation.
(4) These observations are discussed namely in relation to the problem of structural identification of the EDTA soluble fraction of the nacre conchiolin.
(5) To test this hypothesis, we have evaluated the effect of the simultaneous presence of bone and nacre on human osteoblasts in vitro.
(6) In other areas (along the main course of the mantle), transient adhesions between the outer mantle epithelial cells and the nacre appear to temporally further compartmentalize the extrapallial fluid possibly as a prerequisite for the initial crystallization phenomenon.
(7) Induction of mineralization appeared preferentially in bundles of osteoblasts surrounding the nacre chips.
(8) Nacre chips (1 mm3) were placed at approximately 1 mm distance from a similarly sized bone chip on a layer of first passage human osteoblasts.
(9) The five tissues, extracellularly mineralizing algae, radial and granular foraminifera, mammalian bone, mammalian enamel, and mollusk shell nacre, probably span the entire spectrum.
(10) The degree of nacre can be measured by comparing the intensity of scattered red light at an angle of 45 degrees for the flowing system to that when the effect has disappeared.
(11) The results demonstrated that nacre has strong osteogenic effects on human osteoblasts when placed in proximity to bone in vitro.
(12) These findings are consistent with the possibility that nacre adjacent to bone can locally stimulate osteogenic activity.
(13) These results demonstrate that a complete sequence of bone formation is reproduced when human osteoblasts are cultured in the presence of nacre.
(14) In addition, under the conditions of culture used, nacre can also promote the formation by osteoblasts of a structure with characteristics similar to nacre (e.g., lamellar organic matrix mineralized with aragonite, as demonstrated by Laser Raman Spectroscopy).
(15) Osteoblasts proliferated and were clearly attracted by nacre chips to which they attached.
(16) A woman exposed to the dust of sea-snail shells during the manufacture of nacre buttons had clinical and immunological features typical of hypersensitivity pneumonitis; however, transbronchial lung biopsy showed alveolar-septal amyloidosis.
(17) Nacre chips were placed on a layer of first passage human osteoblasts.
(18) The present study was undertaken to test the hypothesis that nacre can induce mineralization by human osteoblasts in vitro.
Nare
Definition:
(n.) A nostril.
Example Sentences:
(1) Group II received a similar inoculum into the left nares.
(2) Among the 395 hospital staff examined during this study, 35.2pc of them were found to carry S. aureus in their anterior nares.
(3) The cell suspension of M. tuberculosis H37Rv was injected into guinea pigs by nares and intraperitoneal, respectively.
(4) A second gas mixture was forced at constant flow into the external nares.
(5) The same result for neonatal nares was also found, after infants had been in the nursery for two days.
(6) Mupirocin or placebo were applied in both anterior nares thrice daily for 2 weeks and subsequently three times weekly for a total of 9 months.
(7) External nares and nasal passageways, albeit blind-ended, were prominent in the proboscis.
(8) Patients and healthy family members who carried the patient strain applied the ointment in nares twice daily every 4th week during 4-15 months.
(9) Earlier in the expedition, the crew believe, they became the first boat to travel through the Nares Strait west of Greenland to the Arctic Ocean in June, once impassable because of sea ice at that time of year.
(10) A total of 34 isolates (31 patients) of S. aureus were available for testing, including 29 isolates (29 patients) from pericatheter skin, four isolates (four patients) from the nares, and one isolate from an episode of peritonitis.
(11) Paucity of lobular cartilage; the flat dorsum; short columella; wide flaring nares; and skin that tends to keloid formation have led many surgeons to attempt radical surgical techniques to obtain rather limited results.
(12) None of them, however, carried P. aeruginosa in their nares.
(13) Coagulase-negative staphylococci (CNS) were cultured from the anterior nares of surgeons, theatre and ward staff, and from patients before and 2 weeks after a total hip replacement.
(14) Activity could also be recorded in the ophthalmic nerve in response to water flow past the submerged nares.
(15) The cleavage lines were annular in arrangement on the skin around the nares, eyes, and preputial orifice.
(16) The major clinical features were failure to thrive, profound mental retardation, dysmorphic head shape, a short nose, anteverted nares, long eyelashes, synophrys, characteristic mouth, and short stature.
(17) Osteotomy of the nasal bone and removal of the nasal septum were performed to help correct the deviation and to facilitate free air passage through the nares.
(18) Urine from unfamiliar males interrupted pregnancy when placed directly on the external nares of newly mated females, but urine from familiar stud males was without effect.
(19) An increased incidence of lesions of the navel, hocks, and nares was observed, but regression analyses showed them to be relatively unimportant in the determination of body weights.
(20) Two cases of congenital bony stenosis of the nasal piriform aperture (anterior nares) are presented.