Phycocyanin
Mostrando 1-12 de 109 artigos, teses e dissertações.
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1. Production of phycobiliproteins by Arthrospira platensis under different lightconditions for application in food products
There has been an increase in investment in research on new sources of natural pigments for food application. Some cyanobacteria can change the structures responsible for light harvesting and cellular processes according to the wavelength and light intensity. This phenomenon has been described as complementary chromatic adaptation. The present study aimed
Food Sci. Technol. Publicado em: 2015-04
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2. Purification of C-phycocyanin from Spirulina platensis in aqueous two-phase systems using an experimental design
C-phycocyanin from Spirulina platensis was purified in aqueous two-phase systems (ATPS) of polyethylene glycol (PEG)/potassium phosphate, varying the molar mass of the PEG. Results using a full factorial design showed that an increase in the concentration of salt and decrease in the concentration of PEG caused an increment in the purification factor for all
Braz. arch. biol. technol.. Publicado em: 2015-02
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3. Kinetics and adsorption isotherm of C-phycocyanin from Spirulina platensis on ion-exchange resins
C-phycocyanin is a natural blue dye extracted from Spirulina platensis, which has many applications in the food and pharmaceutical industries. In this paper the effect of pH and temperature on the adsorption of C-phycocyanin onto two different ion exchange resins (Streamline DEAE and Streamline Q XL) for expanded bed adsorption chromatography was investigate
Braz. J. Chem. Eng.. Publicado em: 2014-12
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4. Antitumor activity of C-phycocyanin from Arthronema africanum (Cyanophyceae)
Pure C-phycocyanin (C-PC) was isolated from Arthronema africanumto evaluate its potential antitumor effects in vivo and in vitro. Experimental myeloid Graffi tumor in hamsters was used as a model. The cell proliferation assay showed that C-PC treatment, at concentration of 100 µg mL-1 for 24 h, significantly inhibited the growth of Graffi tumor cells (51.4%
Braz. arch. biol. technol.. Publicado em: 29/04/2014
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5. Seasonal changes in the pigment composition of natural population of Gracilaria domingensis (Gracilariales, Rhodophyta)
The concentrations of phycobiliproteins (phycoerythrin and phycocyanin), chlorophyll-a and total soluble proteins were determined monthly in three strains (red, green and brown) of Gracilaria domingensis (Kützing) Sonder ex Dickie, collected from natural populations on the coast of Rio Grande do Norte, Brazil. In all the strains, pigment and protein concent
Revista Brasileira de Farmacognosia. Publicado em: 05/06/2012
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6. Statistical evaluation of nutritional components impacting phycocyanin production in Synechocystis SP
Alkaliphilic cyanobacterial cultures were isolated from Lonar lake (MS, India). Among the set of cultures, Synechocystis sp, was studied for phycocyanin production. A maximum yield was obtained in BG-11 medium at optimized conditions (pH 10 and 16 h light). In order to increase the phycocyanin yield media optimization based on the eight media components a Pl
Brazilian Journal of Microbiology. Publicado em: 2012-03
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7. Antioxidant effect of phycocyanin on oxidative stress induced with monosodium glutamate in rats
The objective of this work was to study the antioxidant effect of phycocyanin on the oxidative stress induced by monosodium glutamate in the rats. The tests were performed with 32 rats of Wistar breed, divided into four groups, which were administered saline solution of phycocyanin, monosodium glutamate and monosodium glutamate plus phycocyanin. Sulfhydryl g
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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8. Study of phycocyanin production from Spirulina platensis under different light spectra
The aim of this work was to investigate the production of phycocyanin by Spirulina platensis under different spectra of light. The dependent variables evaluated were the amount of phycocyanin obtained and its purity, demonstrating that there might be a restructuring of phycobilisomes, especially when the culture was subjected to red light, which increased th
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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9. Growth and accumulation of carotenoids and nitrogen compounds in Gracilaria domingensis (Kütz.) Sonder ex Dickie (Gracilariales, Rhodophyta) cultured under different irradiance and nutrient levels
Effects of the interaction of irradiance and nutrient levels on growth and contents of photosynthetic pigments, carotenoids and proteins in Gracilaria domingensis (Kütz.) Sonder ex Dickie (Gracilariales, Rhodophyta) were investigated experimentally. Nutrient availability provided by dilutions of the nutrient solution of von Stosch (25 and 50%, which corresp
Revista Brasileira de Farmacognosia. Publicado em: 13/05/2011
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10. C-phycocyanin extraction from Spirulina platensis wet biomass
C-Phycocyanin is a natural blue dye used in food and pharmaceutical industry. In the present study, a simple and efficient method to extract C-phycocyanin from Spirulina platensis wet biomass is reported. The extractions were carried out using six different methods, including chemical (organic and inorganic acid treatment), physical (freezing and thawing, so
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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11. Clonagem e expressão de β-ficocianina em amostras de Escherichia coli. / Cloning and expression of β-phycocyanin in Escherichia coli strains.
C-phycocyanin (C-PC) is a water soluble pigment and is present in Arthrospira platensis. It is consisted of two subunits, α and β, with molecular masses of 16 and 17 kDa, respectively. Recently it was shown that the β subunit of C-PC Anabaena has antitumor activity. The main objectives of this study were cloning and expression the β subunit o
Publicado em: 2010
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12. Extraction and purification of C-phycocyanin from Spirulina platensis in conventional and integrated aqueous two-phase systems
Extrato aquoso de C-ficocianina de Spirulina platensis, com e sem resíduos celulares, foi purificado em sistema aquoso bifásico (SAB) polietilenoglicol (PEG)/fosfato de potássio variando-se a massa molar do PEG, a pH 6, mais promissor do que a pH 7. Para os ensaios realizados com cada massa molar, com diferentes percentuais de PEG e sal, as concentraçõe
Journal of the Brazilian Chemical Society. Publicado em: 2010