background and objectives: red beet extract concentrate can be used as a natural colorant in food products; however, destructive effects of thermal methods to produce juice concentrate decrease nutritional value in the final product. materials and methods: in this study, red beet extract was concentrated using osmotic distillation method, and the best pretreatment was evaluated to increase the ...

Purpose: To study the biological effects and stability of H.polyrhizus peel extract as a natural colorant nutraceutical in foods
 Methods: Distilled water, 90 % alcohol mixed with citric acid (2 4 %) were used for pigment extraction. Betalain content 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity determined. Cytotoxic effect against human breast adenocarcinoma (MCF-7), c...

The purpose of this study was to assess red beet as a natural colorant in emulsified pork sausage and to investigate the effect of red beet on quality characteristics of emulsified pork sausage during 20 d of cold storage. Red beet was prepared as a powder and a substitute with sodium nitrite at 0.5% and 1.0% levels in emulsified pork sausage. Red beet significantly increased the moisture conte...

Background and Objectives: Red beet extract concentrate can be used as a natural colorant in food products; however, destructive effects of thermal methods to produce juice concentrate decrease nutritional value in the final product. Materials and Methods: In this study, red beet extract was concentrated using osmotic distillation method, and the best pretreatment was evaluated to increase t...

Betacyanins are betalain derivatives showing a red-violet color suitable as natural food colorant. An aqueous extract rich in betacyanin pigments and phenolic compounds from Alternanthera brasiliana was characterized using high-performance liquid chromatography system with diode array electrospray mass spectrometry detection. The major betacyanins (amaranthine, isoamaranthine, betanin isobetani...

To investigate the antibacterial functionality of natural colorant extracts, five kinds of natural dying aqueous solutions were obtained by extraction from peony, pomegranate, clove, Coptis chinensis and gallnut using water at 90 °C for 90 min with a liquor ratio (solid natural colorant material/water, weight ratio) of 1:10. The colorimetric assay and antibacterial activity of cotton, silk, and...

Application of Response Surface Methodology for Modeling the Color Strength of Natural Hair Colorant

Betalain pigments are unique to the Caryophyllales and structurally and biosynthetically distinct from anthocyanins. Two key enzymes within the betalain synthesis pathway have been identified: 4,5-dioxygenase (DODA) that catalyzes the formation of betalamic acid and CYP76AD1, a cytochrome P450 gene that catalyzes the formation of cyclo-DOPA. We performed phylogenetic analyses to reveal the evol...