In recent years, scientists and researchers from all over the world pay much attention to carotenoid pigments as a substitute for antibiotics and synthetic chemical compounds with antioxidant property and the plants, various microorganisms including bacteria and algae are also capable of producing carotenoid pigments. In this research, the production of antimicrobial and antioxidant carotenoid ...

Pigments from microalgae and cyanobacteria have attracted great interest for industrial applications due to their bioactive potential natural product attributes. These pigments are usually sold as extracts, overcome purification costs. The extraction of these compounds is based on cell disruption methodologies chemical solubility compounds. Different been used pigment extraction, such sonicatio...

Abstract The polar psychrotrophic fungus Geomyces sp. WNF-15A can produce high-quality natural red pigment for the potential use as edible pigment. However, it shows low-temperature-dependent synthesis of pigment, which limits its large-scale industrial applications due to difficult and high-cost bioprocess control. This study aims develop transposon-mediated mutagenesis methods generate mutant...

During higher primate evolution, gene conversion seems to have occurred often between the red and green photo-pigment genes, which are tandemly linked on the X chromosome. To understand this phenomenon better, intron 4 sequences of the red and green pigment genes of a male human (an Asian Indian), a male chimpanzee, and a male baboon were amplified by PCR and sequenced. The data show that the i...

Alkaptonuria (AKU) is an ultrarare autosomal recessive disorder resulting from a deficiency of homogentisate 1,2 dioxygenase (HGD), an enzyme involved in the catabolism of phenylalanine and tyrosine. Loss of HGD function prevents metabolism of homogentisic acid (HGA), leading to increased levels of plasma HGA and urinary excretion. Excess HGA becomes deposited in collagenous tissues and subsequ...

ABSTRAK Klorofil merupakan pigmen berwarna hijau yang terdapat pada tumbuhan atau daun hijau. Pigmen klorofil berfungsi menyerap energi cahaya dan mengkonversi tersebut menjadi kimia. Selain itu, juga dapat mentransfer elektron, sehingga ini digunakan sebagai fotosensitizer alami perangkat sel surya tersensitisasi dye (DSSC). Fotosensitizer memiliki beberapa kelebihan seperti harganya murah, ju...

Monascus pigments produced by Monascus spp. are widely used as natural food colourants. Extractive fermentation technology can facilitate the secretion of intracellular Monascus pigments into extracellular non-ionic surfactant micelle aqueous solution, so as to avoid the feedback inhibition and decomposition. In this study, behaviour of the trans-membrane secretion of Monascus pigments was inve...

This paper reports an unusual green pigment, brochantite (Cu4(SO4)(OH)6), on 16th-century Portuguese-Flemish paintings, attributed to the Master Frei Carlos workshop. This green mineral is usually identified as an impurity or alteration product in the green pigments verdigris (Cu(CH3COO)2 nCu(OH)2) or malachite (CuCO3 Cu(OH)2). However, after thorough investigation with a broad range of analyti...

From tiger stripes to the spots on a butterfly wing, we all grow up learning about the beauty and diversity of animal pigment patterns. Such patterns are one of the most obvious traits of animals and serve a variety of functions. Some provide camouflage (zebra stripes) or warnings (the colors of poison arrow frogs). Other patterns have roles in social aggregation and mate choice (guppies), and ...

The epidemiology and natural history of onchocerciasis and its ocular complications in rain forest areas are poorly understood. The present study was conducted on a rubber plantation in a hyperendemic area in the rain forest of Liberia, West Africa, where 800 persons were examined. The prevalence of infection was 84% overall 29% had intraocular microfilariae, and 2.4% were blind in one or both ...