BACKGROUND Most autoimmune diseases occur sporadically; however, endemic pemphigus foliaceus (EPF) is present in specific locales restricted to some geographic rural regions mostly in South America, Central America and in Tunisia (Africa). Its geographic restriction makes it an invaluable natural model for studying how the environment, genetic background and host response contribute to the deve...

1. The relative absorption spectrum of the pigments in their natural state in the photosynthetic bacterium Spirillum rubrum is given from 400 to 900 mmicro. The position of the absorption maxima in the live bacteria due to each of the pigments is: green pigment, 420, 590, 880; red pigment, 490, 510, 550. 2. The relative absorption spectrum of the green pigment in methyl alcohol has been determi...

The influence of polymeric dispersants containing different functional groups on TiO2 pigment particle suspension was investigated at pH 6.0 and 9.5, using rheology and particle size data. The dispersants chosen were polyacrylic acid and modified polyacrylamides including homo and copolymers modified with carboxylate and/or hydroxyl groups. The pigment suspension was strongly affected by both p...

Demand for natural instead of synthetic pigments for coloring fabrics, foods and cosmetics is increasing. Unlike pigments that are synthetic, those from natural sources allow subtle differences in tone because such pigments generally comprise various color components. Microbes have recently received focus as sources of natural pigments (Mapari et al., 2005). Many fungal species produce pigments...

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...

background and objective: pigment production by microorganisms is important due to more rapid growth, higher efficiency, easier extraction, and antimicrobial effects compared to other methods. the aim of the present study is to isolate and identify antibiotic pigment-producing actinomycetes from the soil of the persian gulf and to evaluate the antibiotic activity of their pigments in the second...

Background: using root beet powder pigments without extract or using organic solvents, to study the stability of pigments in model foods tomato paste, strawberry jam, juice, and burger, and to perform preliminary studies consumer acceptance of model foods containing them. Objective: The overall aim of this study was to use microencapsulation technique to increase the stability of red beet pigme...

Several studies have already demonstrated that electrospinning is an excellent tool for forming nano/microfibers. However, the number of parameters affecting formation structures has become a great challenge, including polymeric solutions’ rheological properties, directly morphology fibers formed. The present work aimed to produce composites and determine their comparing them formed by electros...