Cactus pears (Opuntia ficus-indica) are rich in betalains, which are water-soluble
nitrogenous pigments. This study aimed to develop antioxidant, antimicrobial and ammonia …

The Bougainvillea glabra or bougainvillea is a climbing plant native from South America
belonging to the Nyctaginaceae family. The bougainvillea is recognized worldwide for its …

Hybrid materials based on montmorillonite, a cationic polymer and carminic acid were
prepared. The surface charge of montmorillonite was inversed thanks to the cationic …

Hybrid pigments have attracted great interest due to their stability and physicochemical
properties that can be used in paintings, artworks and in the field of cultural heritage. The …

Hybrid pigments based on carminic acid (CA) stabilized by clay minerals have been
prepared. Three different pathways were used: CA@ saponite; CA@ Al-pillared saponite; …

Optical pH sensors are generally fabricated using pH sensitive dyes immobilized on a solid
inorganic carrier. In this work, the natural indicator alizarin (CI 58000) was incorporated in …

The fading of organic dyes is a serious challenge for conservation of art works. Inspired by
the ancient Maya blue pigment, a hybrid pigment of halloysite (Hal) and alizarin (AZ) was …

Alizarin (Az) lake is a typical example of madder lake pigments that are widely used in
cultural heritages. Previous work focused on the complex formation in solution, theoretical …

This paper describes the fabrication of a new hybrid pigment made from 1, 2-
dihydroxyanthraquinone (alizarin) on a mixed oxide host (aluminum-magnesium …

The known ability of select anionic polysaccharides (gum arabic, beet pectin, xanthan gum,
and sodium alginate) to improve shelf and thermal color stabilities of beet betalains at mild …