New white pigments

Tracking Mammals with Fluorescent Pigments: a New Technique

The genetics of New World monkey visual pigments

To have color vision, having at least two cone photopigment types with different spectral sensitivities present in distinct photoreceptors is necessary together with the neural circuitry necessary to extract color information. Visual pigments are highly conserved molecules, but differences can be found among vertebrate groups. Primates have a variety of cone photopigments (i.e., opsins) that ar...

The New White Flight

It was one of the most significant demographic trends of the latter half of the 20th century. It has also been one of the more contro versial issues demographers and sociologists have struggled to interp ret. The subject of white residents fleeing to the suburbs from cities, so-called “white flight,” is not, h o w eve r, past history. Census 2000 reveals that a second wave of white migration is...

A New Class of Flavone Pigments in the Palmae

In the course of a chemotaxonomic flavonoid survey of monocotyledonous families related to the grasses attention was turned to flavonoids in leaves of the Palmae. Many of the flavonoids present were readily identified as known pigments2. Thus, the flavonols, kaempferol and quercetin, and the flavones, apigenin and luteolin, were variously detected in glycosidic combination. Glycosylflavones bas...

Injury-induced biosynthesis of methyl-branched polyene pigments in a white-rotting basidiomycete.

A stereaceous basidiomycete was investigated with regard to its capacity to produce yellow pigments after physical injury of the mycelium. Two pigments were isolated from mycelial extracts, and their structures were elucidated by ESIMS and one- and two-dimensional NMR methods. The structures were identified as the previously undescribed polyenes (3Z,5E,7E,9E,11E,13Z,15E,17E)-18-methyl-19-oxoico...