Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Apocarotenoids pigmentation

Figure 11.8 Structures of c/s-bixin and norbixin, apocarotenoid pigments in annatto. Figure 11.8 Structures of c/s-bixin and norbixin, apocarotenoid pigments in annatto.
Walter, M.H., Fester, T., and Strack, D., Arbuscular mycorrhizal fungi induce the non-mevalonate methylerythritol phosphate pathway of isoprenoid biosynthesis correlated with accumulation of the yellow pigment and other apocarotenoids. Plant J. 21, 571, 2000. [Pg.394]

Cleavage of carotenoid precursors is likely to explain the formation of bixin and crocetin (Figure 5.71) and, indeed, these are classified as apocarotenoids. Large amounts (up to 10%) of the red pigment bixin are found in the seed... [Pg.230]

N.m.r. correlation (270 MHz) with synthetic products has confirmed that the citrus C30 pigments such as 8 -apo-/3-caroten-8 -al have the proposed unsym-metrical C20-C10 apocarotenoid structures (15) and not the alternative symmetrical C15-C15 diapocarotenoid structure (18). [Pg.135]

Carotenoids a large class of yellow and red pigments, which are highly unsaturated aliphatic and ali-cyclic hydrocarbons and their oxidation products. C. are biosynthesized from isoprene units (CsHj) and therefore have the methyl branches typical of isopre-noid compounds. Most C. have 40 C atoms and are thus tetraterpenes (consisting of 8 isoprene units). A few C. contain 45 and 50 C atoms, particularly in nonphotosynthetic bacteria. C. with fewer than 40 C atoms are called nor-, seco- or apocarotenoids. [Pg.99]

Unlike the terpenoid families discussed so far, tetraterpenoids consist of only one class, namely carotenoids, the yellow and red pigments of plants. At present, about 500 different carotenoids are known. A vast majority of these are C40 compounds, though compounds with fewer than 40 (nor- and apocarotenoids - e.g., C30) and more than 40 (homocarotenoids - e.g. C50) carbon atoms have been isolated. The occurrence, chemistry, and biochemistry of carotenoids have been covered in a number of reviews and books (67, 124, 163, 216, 254, 282, 365). [Pg.785]

The liposoluble nature of these compounds determines, a priori, the type of food in which they can be incorporated to dissolve efficientiy. 3-Carotene is added to fatty foods, such as butter, cheeses, and oils, although other pigments such as bixin and apocarotenals are also employed. Paprika and oleoresins industrially obtained from red pepper are used directly or as ingredient in the manufacture of sauces and meat products. Saffron, which contains crocin as a major pigment (a diester of crocetin with the disaccharide gentiobiose), is used as a hydrosoluble condiment for soups and to color foods and drinks. Other hydrosoluble preparations of 3-carotene and other pigments such as canthaxanthin and apocarotenoids are used to color drinks. Norbixin, a product derived from the saponification of bixin, is hydrosoluble, and used to color ice cream, cereals, and cheese. [Pg.294]


See other pages where Apocarotenoids pigmentation is mentioned: [Pg.379]    [Pg.460]    [Pg.733]    [Pg.2007]    [Pg.379]    [Pg.460]    [Pg.733]    [Pg.2007]    [Pg.348]    [Pg.366]    [Pg.370]    [Pg.398]    [Pg.399]    [Pg.404]    [Pg.406]    [Pg.408]    [Pg.408]    [Pg.182]    [Pg.266]    [Pg.185]    [Pg.116]    [Pg.255]    [Pg.610]    [Pg.86]    [Pg.446]    [Pg.2659]    [Pg.493]    [Pg.221]    [Pg.412]    [Pg.349]    [Pg.647]    [Pg.733]    [Pg.742]    [Pg.322]    [Pg.92]   
See also in sourсe #XX -- [ Pg.404 ]




SEARCH



Apocarotenoids

© 2024 chempedia.info