Due to the awareness of impact synthetic dye on human health and environment, natural lake pigment have attracted considerable attention from researcher. Herein, pink−red sappanwood was prepared using adsorption approach. The effects initial pH, pH concentration brazilein solution, dosage aluminium hydroxide, time were also explored. Results showed that maximum capacity 30 mg g-1 achieved when ...

Pigments are compounds with characteristics of importance to many industries. In the food industry they are used as additives, color intensifiers, antioxidants, etc. Pigments come in a wide variety of colors, some of which are water-soluble [1]. The production colorant from biological agents for food and textile has attracted increased interests in recent years. Nature produces many biocolorant...

In this paper, we take a spectral model based approach to the problem of color prediction of halftones. Our approach assumes no scattering through the colorant layers and models the surface and subsurface scattering in the paper substrate by a parametric closed form point spread function. Given a halftone bitmap, we synthesize a high-resolution halftone microstructure image assuming dot profile...

Abstract Phycobiliproteins, including phycoerythrins, are a group of water-soluble pigments produced by microalgae that show potential for being used as natural colourants. The replacement synthetic compounds with colourants obtained from renewable resources is gaining increased interest in the beverages industry. aim present study was to generate and characterise phycoerythrin-rich extract mic...

The present article will introduce a very simple new method for spectral-based color separation. This method inverts a Yule–Nielsen modified spectral Neugebauer model, utilizing its affine multilinearity in the 1/nspace. By means of linear regression, a sequence of colorant combinations is constructed converging to a colorant combination that approximates the desired reflectance spectrum in the...

In recent years there has been a growing interest in the biological activity of red beetroot (Beta vulgaris rubra) and its potential utility as a health promoting and disease preventing functional food. As a source of nitrate, beetroot ingestion provides a natural means of increasing in vivo nitric oxide (NO) availability and has emerged as a potential strategy to prevent and manage pathologies...