This argues against the interpretation that he is depicting nacreous
clouds, at least in these later images.
Concerning a common factor in a bone and mollusk shell formation, some reports suggest that a BMP-2-like diffusible osteoinductive factor exists in the nacreous
layer of the pearl oyster although the substances have not yet been identified [12-15].
Outer lip lacking external varix, but thickened internally and bearing up to 15 denticles; denticles ridge-like, more or less in a single row and usually alternating in strength, that nearest columella usually strongest and separated from basal columella tooth by a U-shaped notch; edge of outer lip flaring; interior highly nacreous
, not spirally lirate (except at apertural thickening), but somewhat angled beneath cords of external surface.
"Iron Oxide Coated Mica Nacreous
Pigments." US Patent 4.146,403, 1979
The phases of the sample were identified using X-ray diffraction (XRD) and results indicated that aragonite was detected in the nacreous
layer, calcite was detected in the prismatic layer (Figure 3).
Besides making these products smooth and silky so they apply well to the skin, this nacreous
pigment breaks up and scatters light.
The smoke / Circles and begins to clear...." With the word "infantine" instead of the usual "infantile" and "nacred" in lieu of "nacreous
," the diction of the poem succeeds in creating the mythical ambiance the poet most likely strived for.
"If we rear the oyster for a longer period, the lustre of the nacreous
layer might be decreased, because the surface of the nacreous
layer becomes more irregular," said Dr Hiromichi Nagasawa, a scientist at the University of Tokyo.
Once they brought us a basket of shells that smelled like drying seaweed and I put the shells all around our room, big white whelks and nacreous
jingle shells, thin as paper, and blue cockles striped with yellow, on the mantel and the night table.
Sometimes such surprises are of a subtle nature, such as in a recent pale yellow pot, whose nacreous
surface carries a whisper of emerald-green like the bloom on a peach, caused by its serendipitous proximity to another pot in the kiln.
ceramic vases inspired a search for a glaze that would capture the shifts of natural light.
(1990) used internal growth lines from the middle of the nacreous
layer (Method 3) combined with von Bertalanffy growth model predictions to determine the asymptotic maximum attainable valve lengths.