Carotenoid Pigments fromRhodococcus rhodochrousRNMS1: Two Monocyclic Carotenoids, a Carotenoid Monoglycoside and Carotenoid Glycoside Monoesters

The Carotenoid Pigments

Carotenoid Pigments: Supercritical Fluid Chromatography

Carotenoids are one of the main classes of natural pigments and are found in a large number of fruits and vegetables (oranges, tomatoes, carrots) and in leaves where their presence is masked by chlorophylls until autumn. They are also found in some animal products (eggs, milk) and seafoods. Typically, carotenoids contain eight isoprenoid units bonded such that the units are reversed at the cent...

Carotenoid pigments and photokilling by acridine orange.

It has long been known that certain organic dyes can photosensitize cells, leading to cellular damage or death. Recently, studies were performed on one such dye, Toluidine Blue, to determine the mechanism of its lethal photosensitization of bacteria (M. M. Mathews, J. Bacteriol. 85:322, 1963). These studies showed that the cellular site of the lethal action was the cytoplasmic membrane and its ...

Dietary carotenoid pigments and immune function in a songbird with extensive carotenoid-based plumage coloration

Carotenoid pigments can directly enhance the immune responses of vertebrates, and they are used by many animals to create ornamental color displays. It has been hypothesized that these two functions of carotenoid pigments are linked: animals must trade off use of carotenoid pigments for immune function versus ornamental display. We tested two key predictions of this hypothesis with captive Amer...

Carotenoid pigments of Badami mango fruit.

The only attempt at the isolation of carotene from mango fruit seems to have been made by Yamamoto Osima & Goma (1932) who obtained 60 mg. of a crystalline preparation from 38 kg., of fresh fruit pulp. From a study of its optical activity and absorption spectrum they concluded that it was a mixture of aand P-carotenes, which were, however, not separated. The inconclusive nature of their data ha...