Abstract Background: Transpupillary thermotherapy is a new treatment for subfoveal choroidal neovascularization which needs further evaluation. This study was aimed to evaluate the efficacy of transpupillary thermotherapy on regression of occult subfoveal choroidal neovascularization with or without pigment epithelial detachment in patients with age-related macular degeneration. Methods: In a ...

The carotenoid pigment astaxanthin has important applications in the nutraceutical, cosmetics, food and feed industries. Haematococcus pluvialis is the richest source of natural astaxanthin and is now cultivated at industrial scale. Astaxanthin is a strong coloring agent and a potent antioxidant - its strong antioxidant activity points to its potential to target several health conditions. This ...

A hybrid molecular photovoltaic system, based on fullerene C(60) and lutein (a natural photosynthetic carotenoid pigment) that are assembled in a phospholipid/alkanethiol bilayer matrix, is described here. The assembly and photoconversion behaviors of such a system were studied by UV-vis spectroscopy, cyclic voltammetry, impedance spectroscopy, photoelectrochemical action spectroscopy, and phot...

Astaxanthin, a natural red pigment that belongs to the carotenoid group, has been known as super antioxidant due its very strong activity (65 times higher than vitamin C, 54 more potent -carotene, and 14 E). Haematococcus pluvialis is microalgae with high astaxanthin content. The benefit of in health issues mainly potential treatment for degenerative diseases caused by reactive oxygen or nitrog...

Natural Bile Pigments, Coprobiliverdin III, Model Chromophore, Spectroscopy, MO-Calculations The synthesis of l5N-labeled coprobiliverdin III, a bile pigment with four conjugated pyrrole nuclei and four carboxylic acid side chains, is described. Coprobiliverdin is structurally characterized by chemical and various spectroscopic methods (e.g. chromic acid degradation, UV-vis-, IR-, mass spectros...

It is well knowni that the genus Pseudomonas comllpirises several p)igment-producing species, an(l that in all cases in whiich the constitution of these pigments lhais l)een estal)lishedl thlehave leen found to l)e plhenlzine (lerivatives. Wrede and Strack (1929) were the first to prove this foI pyocyanine, the pigment produce(l by Pseudomonas aeruginosa (P. pyocyanea). Pyocvanine is now usuall...

Carotenoids from some of the coloured yeasts like Rhodotorula, Phaffia rhodozyma have attracted commercial interest as a natural pigment for foods. Red yeast isolated from contaminated Potato dextrose agar plate (PDA), designated as Rhodotorula glutinis DFR-PDY has been found to produce carotenoids. In the present study toxicological evaluation of carotenoid pigment has been reported. Experimen...

Bacteria are often found in high concentrations in brown pigment and less so in cholesterol gallstones. Although it is intriguing to hypothesize that cholesterol stone formation is non-bacterial in nature and principally different from the pathogenesis of "infectious" brown pigment gallstones, it is more likely that significant overlap exists between the two processes. Most gallstones are compo...

The marine environment plays a vital role in producing valuable natural products for biomedical and pharmaceutical research. pigment is one of the bioactive molecules derived from bacteria. strain SB2 was isolated saltern areas Marakanam to produce yellow pigment, round, smooth colonies on selective media. opted out further studies based its production (1.68 mg l-1). incubation period, pH, temp...


 Natural pigments extracted from plants are raised as a vital substitute to artificial dyes. The present study was conducted extract pigment Bistorta amplexicaule and evaluate its dyeing property, antimicrobial activity toxicity. extraction done by maceration sonication methods with 7.5% 5% yield, respectively. appeared bright- amber colored which used for fabrics food using traditional m...