Pigment structures

Tribenzoxepin-3-carboxylic acid, 1-methyl-NMR, 7, 552 Trichosiderin synthesis, 3, 1010 Trichosiderin pigments structure, 3, 1038 Trichothecane, 7, 400 Trichoviridine, 7, 192 Tricromyl... 

Substitution of the bulky adamantyl group on the C(10) position of the bUiverdin pigment structure leads to the distortion of hehcal conformation and hence the pigment color would shift from blue to red [94]. 

Besides their interesting color application values, betalainic plants are also worthwhile from a nutritional standpoint. Research on this topic has recently been resumed with great scientific vigor in both in vitro and in vivo studies on red beets, amaranth, red-colored Swiss chard, red-violet pitahayas, and especially cactus pears. ° In the future, betalainic color crops will be benchmarked because of their pigment structure and quantity and also because of the individual and synergistic activities of their components such as colorless phenolics, amino compounds, peptides, proteins, and hydrocolloids. 

R. M. Christie, Pigments Structures and Synthetic Procedures, Oil and Colour Chemists Association, London, 1993. 

The spontaneous isomerization of all-trans- carotenoids at room temperature is a slow process, and its rate depends on the solvent and the pigment structure. For example, the initial solutions of P-carotene in a mixture of tetrahydrofuran (THF), methanol, and acetonitrile containing ca. 95% of all -trans- and 5% of 9-cis- plus 13-co-isomers was transformed to 90% all-fra ns- p -ca rot ene and 9% of 9-cis- plus 13-cA-carotene after 24h of spontaneous isomerization at 25°C (Pesek et al. 

Another member of this group is a yellowish green pigment, structurally derived from a benzothiazolium system (125)... 

Copper ferrocyanide complex salts, which are occasionally used, are derived from copper-l-hexacyano-iron-2-acid HCu3[Fe(CN)6], Three equivalents of copper are required for each unit of ferrocyanide, which furnishes the following general pigment structure ... 

Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural and functional materials, and in environmental and energy-related areas... 

Compounds Included in the NMR Tables. Individual Pigment Structures Are Shown in Figure 2.8-Figure 2.16... 

Rutile Ceramic Pigments. Structurally, all rutile pigments are derived from the most stable titanium dioxide structure, ie, rutile. The crystal structure of rutile is very common for AX2-type compounds such as the oxides of four valent metals, eg, Ti, V, Nb, Mo, W, Mn, Ru, Ge, Sn, Pb, and Te as well as halides of divalent elements, eg, fluorides of Mg, Mn, Fe, Co, Ni, and Zn. 

Pigment structure and absorption properties of phycobilin chromophores... 

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