Synthetic food colorants are widely added to in order attract the consumer. Many researchers have incriminated these additives for causing some problems human health. This research was conducted determinate toxic effects of selected synthetic dyes (A, B and C) biochemical parameters male albino rats acute test. The limit test dose 5000 mg/kg administered four then observed individually 1hour po...

Natural dyes are widely used in the coloring of food, leather and wood [1]. Traditionally they were the only colorants for textile fibers like wool, silk, cotton and flax. Their use in textiles declined drastically with the introduction of synthetic dyes in 1856 [2-6]. Presently the use of synthetic dyes is estimated at around 10,000,000 tons per annum [7-11]. The manufacture and use of this la...

In recent years, public concern about the safety of synthetic pigments led to increasing interest in the development of food colorants from plant tissues, especially from some edible sources. As a group of natural, water-soluble and nontoxic pigments, anthocyanins are widely distributed in plant world and display a variety of colors from orange to purple (Fossen et al., 1998; Janna et al., 2007...

Nonenzymatic browning reactions proceed with the starting reactants of sugar and/or protein during thermal processing and storage of food. In addition to food color formation, the process also contributes to the loss of essential nutrients, generation of beneficial antioxidants, and production of toxicants, including 5-hydroxymethylfurfural (5-HMF), reactive carbonyl species, advanced glycation...

High-performance liquid chromatography coupled with spectrophotometric and electrospray mass spectrometric detection (HPLC-UV-Vis-ESI MS) was used for characterization of natural dyes present in historical art works. The gradient program was developed for identification of 29 colorants of various polarities. Dual detection system (UV-Vis and ESI MS) allowed differentiation of all compounds, eve...

Carotenoids are bio-pigments naturally available in many prokaryotic and eukaryotic microorganisms which cannot be synthesized biologically by one self including animal but, required for our basic nutritional supplement. Different types of carotenoid pigments are available with different colors especially yellow, orange, red, and purple etc. includes approximately 700 different types (Cabral et...

Natural colorants have been widely used in food and cosmetic products. Nonionic and anionic surfactants are also usually added as solubilizers and stabilizers in the products. Surfactants form a special structure, a so-called micelle. Micelles can alter stabilities and physicochemical properties of other chemicals in the system. The objectives of this study were to determine stabilities in mice...

Conspicuous displays of color comprise an enormously diverse and functionally complex class of biological signals. Many of these displays are widely publicized as resulting from chemical colorants known as pigments, which act by selectively ‘‘absorbing’’ part of the light spectrum (Appendix 1). However, the full diversity of animal coloration is just as strongly influenced by optically active s...