title: [Retinal pigments and carotenoids of the light-shading "spectacles" of the greenling Hexagrammus octogrammus].
abstract: Three light-sensitive pigments having lambdamax of 480, 505 and 540 nm which contain retinal as a chromophore were found in the digitonine extracts from the retina of H. octogrammus. In summer time, only one pigment (lambdamax equals 480 nm) was found, whereas during autumn and winter periods the other two pigments (lambdamax equals 505 and 540 nm) could be also observed together with the first one. The lambdamax  480 pigment is easily degraded when being exposed to light, although it is resistant to the effect of hydroxylamine. The other two pitments are less sensitive to the light, but are readily bleached by hydroxylamine. The yellow-orange coloured cells of the light-shading "spectacles" contain a mixture of beta-carotenoids. When extracted by petroleum ether, these beta-carotenoids display lambdamax at 425, 445 and 476 nm. Column chromatography on aluminium oxide revealed 6 fractions in the extracted carotenoids: light-yellow, dark-yellow, brown, reddish-brown, pink and pinkish ones. In the range from yellow to pink fractions, the contribution of the lambdamax 475 nm band increases, while that of two other ones-decreases.
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000032:analysis*; D005399:Fishes; D012160:Retina / Q000032:analysis*; D012168:Retinal Pigments / Q000032:analysis*; D013053:Spectrophotometry
chemical_list: D012168:Retinal Pigments; D002338:Carotenoids
vernacular_title: Pigmenty setchatki i karotinoidy svetozashchitnykh "ochkov" terpuga Hexagrammus octogrammus