Functional colorants

Sumio Tokita, Masaru Matsuoka, and Yoshiya Kogo, Molecular Design of Functional Coloring Matter PPP Molecular Orbital Method and Its Application, Maruzen, Tokyo, 1989. 

Function Color stabilizer enzymatic browning inhibitor. 

Function Color-retention agent firming agent. 

Function Color enzyme flavoring agent humectant nutritive sweetener stabilizer thickener and texturizer. 

Function Color fixative in meat and meat products antimicrobial agent. 

Fig. 10. Scheme of surface functionalized coloring pigments by octylsilane. 

ESTEVEZ, o. (1982) A better colorimetric standard observer for color-vision studies. The Stiles and Burch 2° color-matching functions. Color Research and Application, 1, 131-134. 

Figure 4. (A) Front view (looking into the active site) and (B) back view of human lysozyme colored according to Feldmann s functional color scheme. Front view of (C) human lysozymes colored according to Eisenberg s atomic solvation parameters. Tryptophan residues are additionally colored red. Continued on next page.

Function Colorants act either by absorbing parts ofthe spectrum and reflecting other parts (solid pigments, dyes), or by transmitting only certain wavelengths (transparent colours) these effects can be combined with multi-layer structures, also using interference patterns to achieve an effect... 

The extent of functional coloration is associated to the yields of radiochemical transformations. It means that the molecular structure/bond strength, crystallinity and the presence of aromatic rings are the factors that explain the susceptibility of polymer to remain colored after radiolysis. The spectral evaluation of coloring intensity is the easiest procedure for the qualification of dose level. 

The formation of an azomethyne ylide during the photodecarboxylation of N-phthaloyl a-amino acid 1 makes easier the interpretation of the results obtained in the presence of methyl aerylate. If we examine the structure of the reaction product 2, we would easily reeognize the fragments corresponding to the acrylate (colored red), the A-phthaloyl a-amino acid 1 that has lost the carboxylic acid function (colored blue) and the new bond formed (in black) (Scheme 16.6). The... 

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