Color enhancement effect

Methods for the quantitative estimation of desoxyribonucleic acids, based on the Feulgen nucleal reaction have been reported,84 but because of factors like the color-enhancing effects, these methods must be accepted with reservations.87... 

The color and effect produced by NGR stains and any stain mixture depend on several factors other than the colors or type of dyes used. Those factors include strength of the mixture, the amount appHed, the type of substrate, and the solvent system used for the stain. The role of the wood stain is not to provide protection rather, the primary function of the stain is to impart color effects by accentuating grain patterns. The transparency and brightness needed to enhance the natural beauty of the wood are optimized by using dye-type stains for wood. 

In a first study designed to describe its effects in normal individuals, not one of eight subjects reported hallucinations, visual distortions, color enhancement, or mental imagery, while all of them evidenced other pronounced reactions enhancement of feelings, increased communication, and heightened reflectiveness, which led to a concern with their own problems or those of society or mankind. Further experiments with MDA in neurotic patients in the context of psychotherapy have confirmed such effects, but here physical symptoms were of frequent occurrence, and visual phenomena were described by most individuals at some point of their experience. Yet the most characteristic feature of the experience of these subjects was one which we will here call age regression. ... 

Contact time, temperature and sulfiting are factors that influence phenolic compound dissolution and color in rose wines (Castino, 1988). Sulfur dioxide is known to have a certain dissolvent power (Section 8.7.5). It is not manifested during traditional red winemaking, due to the preponderant effects of other factors (duration, temperature and pumping-over). Yet when maceration is limited, the effect of sulfiting is obvious. Table 14.3 shows the impact of the winemaking techniqne on the color intensity and phenolic componnd concentrations of rose wines. Sulfiting promotes anthocyanin dissolution and color enhancement. It is not easy to control the conditions that will produce the required color and phenolic structure, as they depend on the specific characteristics of the wine. 

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