background and objectives : halophilic bacteria produce a variety of pigments, which function as immune modulators and have prophylactic action against cancers. in this study, colorful halophilic bacteria were isolated from solar salt lake and their pigments was extracted in optimal environmental conditions and compared with the pigments of halorubrum sodomense atcc 33755. materials and methods...

A solvent recycling reflux extraction process for Panax notoginseng was optimized using a design space approach to improve the batch-to-batch consistency of the extract. Saponin yields, total saponin purity, and pigment yield were defined as the process critical quality attributes (CQAs). Ethanol content, extraction time, and the ratio of the recycling ethanol flow rate and initial solvent volu...

The fluorescence transient of Chlorella pyrenoidosa, excited by saturating blue light, has a base level O, hump I, dip D, peak P, and at 1.5 sec a quasi-steady level S (12). With 2 sec exciting exposures and 4 min dark periods, preillumination-1 (lambda >/= 690 nm, intensities 1-750 ergs/sec-cm(2) incident), replacing the dark periods, lowers I more effectively than preillumination-2 (650 nm </...

The present work highlighted the production of violacein by the locally isolated Chromobacterium violaceum (GenBank accession no. HM132057) in various agricultural waste materials (sugarcane bagasse, solid pineapple waste, molasses, brown sugar), as an alternative to the conventional rich medium. The highest yield for pigment production (0.82 g L⁻¹) was obtained using free cells when grown in 3...

IN a preliminary paper [Lemberg, Legge & Lockwood, 1938] we have already reported the isQlation of biliverdin (dehydrobilirubin) and of biliviolin from. choleglobin solutions. Under remarkably mild conditions haemoglobin is thus transformed. into bile pigments; these conditions are such as are found in the cells of organs forming bile pigment, except that acid was used for the removal of the ir...

The pigment content in microalgae is a specific feature of each species. Its evaluation is essential as an indirect measure of cell growth, as well as a parameter to check the trophic level of waters. Several methods can be found in literature, most of them based on spectrophotometric analyses, referred as a good and practical tool for chlorophyll evaluation. A comparison of different methods t...

lycopene is a natural and dominant pigment in tomato with coloring and antioxidant properties, which nowadays the demands for its extraction enhancement from tomato and tomato products are increasing. in this study, the effect of pectinase enzyme pre-treatment at 2- 10 ml/kg and also washing with 94% ethanol at 60°c for 5 seconds was studied. in these conditions, treating with 10 ml/kg enzyme c...

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...

In this article, the effect of potassium on structure and anticorrosion properties of zinc phosphate pigments has been investigated. The co-precipitation method was selected as synthesis method of potassium zinc phosphate pigment. Then the synthesized pigment was characterized by x-ray diffraction XRD, Fourier transform infrared FTIR and Raman spectroscopy. Morphology of the powders was investi...

Various biotechnological approaches have been employed to convert food waste into value-added bioproducts through fermentation processes. Whey, a major generated by dairy industries, is considered an important environmental pollutant due its massive production and high organic content. The purpose of this study investigate the effect different parameters in simultaneous hydrolysis (SHF) whey fo...