(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.
Pearl
Definition:
(n.) A fringe or border.
(v. t. ) To fringe; to border.
(n.) A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Pearls which are round, or nearly round, and of fine luster, are highly esteemed as jewels, and compare in value with the precious stones.
(n.) Hence, figuratively, something resembling a pearl; something very precious.
(n.) Nacre, or mother-of-pearl.
(n.) A fish allied to the turbot; the brill.
(n.) A light-colored tern.
(n.) One of the circle of tubercles which form the bur on a deer's antler.
(n.) A whitish speck or film on the eye.
(n.) A capsule of gelatin or similar substance containing some liquid for medicinal application, as ether.
(n.) A size of type, between agate and diamond.
(a.) Of or pertaining to pearl or pearls; made of pearls, or of mother-of-pearl.
(v. t.) To set or adorn with pearls, or with mother-of-pearl. Used also figuratively.
(v. t.) To cause to resemble pearls; to make into small round grains; as, to pearl barley.
(v. i.) To resemble pearl or pearls.
(v. i.) To give or hunt for pearls; as, to go pearling.
Example Sentences:
(1) Based on their localisation and histology these are classified into three types (Epstein's pearls, Bohn's nodules, Dental lamina cysts).
(2) Pregnancy occurred in 14 women corresponding to a Pearl-index of 55.6.
(3) Bloody odd combination but those Orange Foam Headphones would blast those magnificent records into my developing brain over and over again" chernypyos – Björk's Human Behavior and Sinead O'Connor's Fire On Babylon: "bjork's 'human behavior' and sinead o'connor's "fire on babylon" oddly stick in my head from that one evening walking in the woods, breathing the damp air, and feeling pleasantly invisible" Pyromancer – REM – Automatic for the People Blood Sugar Sex Magic Pearl Jam - Vs RATM's first album Portishead Maxinquaye by Tricky Manic Street Preachers – Gold Against the Soul Smashing Pumpkins, Siamese Dream "I used to go to the local library and take out a CD (50p for 3 weeks!
(4) Further south is Ghadames, one of the most ancient settlements in north Africa , which Unesco calls “the pearl of the desert”.
(5) Whereas a simple tympanoplasty could cure a localized pearl, typically anterosuperior in the mesotympanum, the stapes is fast eroded (7 cases) if progression goes on.
(6) The pregnancy rate after 5 years was 3.2 or a Pearl index of 1.21 which is very good compared to other methods of contraception now available.
(7) Our plan is to have 200 Pearl accredited homes by the end of 2016 to help meet the UK's growing need for specialist dementia care centres with specially trained staff.
(8) We now have 67 Pearl accredited homes with a further 70 working through the pathway to achieve accreditation.
(9) It was established that density of one-generation concrements resembling pearl granules was far greater as compared to that of the other varieties of cholesterol concrements.
(10) use efficacy may be calculated in 2 ways: the Pearl Index (the failure rate expressed as the number of pregnancies divided by the number of months of exposure and multiplied by 1200) and the cumulative life table method.
(11) Brush the buns with the egg and sprinkle with pearl sugar.
(12) It has a Pearl index of 2.9 and must be replaced yearly.
(13) PEARL can also serve as a tool in basic research on human psychophysiology.
(14) The packing of crystals seemed to be less tight in pearl enamel.
(15) Confectionery levels ranged between 0.26 and 7.9 mg g-1, whilst contents in health products were 0.30-47.1 mg g-1, the highest values being measured for throat pearls.
(16) Twenty-four wethers had ad libitum access to a total forage diet (pearl millet forage), water and trace mineralized salt.
(17) Compared with Progestasert, LNG Nova-T showed lower pregnancy rates (Pearl Index 0.30), less risk for ectopic pregnancy, and a longer effective lifetime (7 years).
(18) The physical parameters tested were: test weight (TW), endosperm texture (TE), pearling index (IP), 1000 kernel wt (W 1000), infrared reflectance (NIR) and color (Ref).
(19) Shenzhen , the country’s first SEZ, which opened in 1980, currently harbours 300,000 migrant workers, while Pearl River Delta Economic Zone is home to 42 million people.
(20) In the mid-1990s, when the movement's influence on HTB was at its height, I visited a Chelsea church run by Nicky Lee, one of the men who converted Welby at Cambridge, and when the Holy Spirit started knocking people down, I'd hear the distinct rattle of pearls when the young women fainted to the floor.