His largely unrecognised pigment experiments from the early 1960s led to works of peculiar brilliance and transparency.
In phase four, the flexible retinal epithelium grows, and its tangential expansion against the stiff, restraining retinal pigmented epithelium results in inward buckling, largely mimicking normal, in vivo optic cup formation.
Some feathers are pigmented.
Skin types range from very little pigment (type 1) to very darkly pigmented (type 6).
The sample shows a largely ground blue pigment applied on top of a white layer, interpretable as a ground (Fig. 7).
Yet other factors might also play a role: oil absorption values largely depend on pigment particle characteristics, as size and shape, as well as on the paint manufacturing process; paints produced from grinding by hand with a muller may contain considerably more oil than modern machine-ground paints [60].
Brazilin [7,11b-dihydrobenz[b]indeno[1,2-d]pyran-3,6a,9,10 6H -tetrol], the major component of C. sappan L. [7,11b-dihydrobenz[b]indeno[1,2-d]pyran-3,6a,9,10 6H -tetrol]l staining.
In the West, 80-90% of gallstones are cholesterol stones [ 1], whereas the majority of gallstones found in Asian populations are pigment stones (high-residue pigment, low-residue pigment, and muddy pigment types), derived largely from salts or polymers of bilirubinate [ 9- 11].
Although other pigments could have been present in Microraptor's feathers, they would have been largely masked by black pigments, rendering the creature crowlike in appearance (main image) except for that long, bony tail and lengthy feathers on its legs.
