Reactions of Carotenoid Pigments in Photosynthetic Bacteria

The Production of Carotenoid Pigments from Mineral Oil by Bacteria.

During the course of studies of the utilization of petroleum products by microorganisms, several Mycobacterium cultures were isolated which grew well in a mineral salts medium containing mineral oi,2 and as a result of their metabolism, "oil-soluble" pigments were produced which colored the oil yellow or orange. Since previous investigators have not described the production of "oil-soluble" pig...

Fluorescence-ODMR of Light Harvesting Pigments of Photosynthetic Bacteria

The triplet state of photosynthetic pigments has been widely used in the past as an internal nonde­ structive probe for the geometric and electronic structure of the pigment-protein complexes of photo­ synthetic bacteria. Especially the reaction center complex (RC) has been intensively studied by means of ESR in high field and zero field [1—7]. Less is known about antenna complexes. So far only...

The Carotenoid Pigments

Photosynthetic Pigments in Diatoms

Photosynthetic pigments are bioactive compounds of great importance for the food, cosmetic, and pharmaceutical industries. They are not only responsible for capturing solar energy to carry out photosynthesis, but also play a role in photoprotective processes and display antioxidant activity, all of which contribute to effective biomass and oxygen production. Diatoms are organisms of a distinct ...

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...