Malt extract is a highly viscous, rich in sugars, water-based solution. It is produced by means of vacuum evaporation of a sugar solution (mash) in the brewing industry. It is a natural flavour and colorant and is widely used in baking, confectionery, breakfast cereals, malt beverages, dairy products, sauces and as a caramel substitute. The difficult handling and dosing of that viscous liquid p...

Basella alba fruit with dark blue skin and deep red violet flesh is a potential source of natural colorant. This study was aimed to evaluate the total betacyanin content, total phenol and to analyse the antioxidant activity against DPPH radical, superoxide anions, hydroxyl radical, metal chelating, hydrogen peroxide, FRAP, ABTS and deoxyribose degradation in a dose dependend manner. Betacyanin ...

The dyeing of woolen yarn with eggplant peel, a natural colorant, has been studied. The main coloring component in this natural colorant is anthocyanin, which is an interesting class of dyes in the blue and red area. Eight mordants including alum, copper sulfate, ferrous sulfate, potash alum, nickel chloride, zinc sulfate, tin chloride, and potassium dichromate were used for mordanting the ...

The demand for natural colors is increasing day by day due to harmful effects of some synthetic dyes. Bacterial and fungal pigments provide a readily available alternative source of naturally derived pigments. In contrast to other natural pigments, they have enormous advantages including rapid growth, easy processing, and independence of weather conditions. Apart from colorant, bacterial and fu...

Abstract The research aimed to dye silk satin textiles with a plant-derived colorant in the presence of additives natural origins, such as chitosan and shellac, investigate whether they can satisfactory results. In this study, series mechanical properties (Young modulus, elongation at break, tensile strength), colorfastness following exposure UVC irradiation 6 months storage dyed samples were t...

The extracellular colorants produced by Chlorociboria aeruginosa, Scytalidium cuboideum, and Scytalidium ganodermophthorum, three commonly utilized spalting fungi, were tested against a standard woodworker's aniline dye to determine if the fungal colorants could be utilized in an effort to find a naturally occurring replacement for the synthetic dye. Fungal colorants were delivered in two metho...

Barcodes are widely utilized for embedding data in printed format to provide automated identification and tracking capabilities in a number of applications. In these applications, it is desirable to maximize the number of bits embedded per unit print area in order to either reduce the area requirements of the barcodes or to offer an increased payload, which in turn enlarges the class of applica...

A 1670 bp 5'-flanking region of the polyphenol oxidase (PPO) gene was isolated from red Swiss chard, a betalain-producing plant. This region, named promoter BvcPPOP, and its 5'-truncated versions were fused with the GUS gene and introduced into Arabidopsis, an anthocyanins-producing plant. GUS histochemical staining and quantitative analysis of transgenic plants at the vegetative and reproducti...

Red dragon fruit or red pitaya (Hylocereus polyrhizus) is the only edible fruit that contains betalains. The color of betalains ranges from red and violet to yellow in plants. Betalains may also serve as an important component of health-promoting and disease-preventing functional food. Currently, the biosynthetic and regulatory pathways for betalain production remain to be fully deciphered. In ...

Betalains are pigments that replace anthocyanins in the majority of families of the plant order Caryophyllales. Betalamic acid is the common chromophore of betalains. The key enzyme of the betalain biosynthetic pathway is an extradiol dioxygenase that opens the cyclic ring of dihydroxy-phenylalanine (DOPA) between carbons 4 and 5, thus producing an unstable seco-DOPA that rearranges nonenzymati...