Carotenoids Biosynthesis
Mostrando 1-12 de 83 artigos, teses e dissertações.
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1. Effect of temperature and nitrogen concentration on biomass composition of Heterochlorella luteoviridis
Abstract The interest in microalga as a food supplement has grown due their high contents of carotenoids, polyunsaturated fatty acids and proteins. This study evaluated the effect of different temperatures (22, 27 or 32 °C) and sodium nitrate concentrations (12, 24, 36, 48 or 60 mg L-1 of N-NO3) in culture medium on Heterochlorella luteoviridis biomass prod
Food Sci. Technol. Publicado em: 2017-12
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2. Torularhodin and Torulene: Bioproduction, Properties and Prospective Applications in Food and Cosmetics - a Review
Torularhodin and torulene are two widespread microbial carotenoids with relatively few studies, as compared to other nutraceutical carotenoids such as β-carotene, lycopene and astaxanthin. Several genera of microorganisms produce it in high concentration (up to 0.1% of the cell dry weight), probably as a protection against photooxidation and free radicals.
Braz. arch. biol. technol.. Publicado em: 14/10/2014
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3. Enhanced biosynthesis of quercetin occurs as A photoprotective measure in Lycopersicon esculentum mill. under Acute UV-B exposure
Lycopersicon esculentum respond to UV-B by enhanced synthesis of flavonoid quercetin, a strong antioxidant that helps the plants to well acclimatize to UV-B stress. Three weeks old plants of L. esculentum were subjected to acute UV-B irradiation for 20, 40 and 60 minutes daily until 28 days and analyzed for the morphological and biochemical changes. UV-B exp
Braz. arch. biol. technol.. Publicado em: 2014-06
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4. Obtenção e propriedades de toruleno da levedura Rhodotorula glutinis / Obtaining and properties of torulene from Rhodotorula glutinis yeast
Carotenoids are natural colorants, some of which are precursors of vitamin A. Since the past decade, an important role in reducing the risk of various degenerative diseases was attributed to these compounds. With these vital functions, the search for sources has intensified worldwide. The biotechnological production of specific carotenoids, using bacteria, f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/11/2011
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5. Isoprenoid biosynthesis in the erythrocytic stages of Plasmodium falciparum
The development of new drugs is one strategy for malaria control. Biochemical pathways localised in the apicoplast of the parasite, such as the synthesis of isoprenic precursors, are excellent targets because they are different or absent in the human host. Isoprenoids are a large and highly diverse group of natural products with many functions and their synt
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-08
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6. Effects of heavy metals and light levels on the biosynthesis of carotenoids and fatty acids in the macroalgae Gracilaria tenuistipitata (var. liui Zhang & Xia)
We present here the effect of heavy metals and of different light intensities on the biosynthesis of fatty acids and pigments in the macroalga Gracilaria tenuistipitata (var. liui Zhang & Xia). In order to verify the fatty acid content, gas chromatography with flame ionization detection (GC-FID) was employed. Pigments (major carotenoids and chlorophyl-a) wer
Revista Brasileira de Farmacognosia. Publicado em: 15/04/2011
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7. Carotenoid biosynthesis structural genes in carrot (Daucus carota): isolation, sequence-characterization, single nucleotide polymorphism (SNP) markers and genome mapping.
Carotenoid pigments are important components of the human diet and carrots are the main dietary sources of the vitamin A precursors IX- and /3- carotene. Carotenoids play essential biological roles in plants and the genes coding for the carotenoid pathway enzymes are evolutionarily conserved, but little information exists about these genes for carrot. In thi
Theoretical and Applied Genetics. Publicado em: 2011
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8. Carotenoides e compostos bioativos : relação com propriedades anti-radical livre e corante em frutas tropicais / Carotenoids and bioactive compounds : relationship between free radical scavenger properties and color in tropical fruits
The increased demand for high life quality has been associated to healthy food, increasing the industry interest for functional foods, which are defined as any food or bioactive compounds with potential to be benefic for the consumer health. The bioactive compounds found in foods, such as carotenoids, phenolic compounds and ascorbic acid (AA) are involved wi
Publicado em: 2008
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9. Biochemical aspects of carotenoids biosynthesis in Gonyaulax polyedra (Dinophyceae) / Aspectos bioquímicos da biossíntese de pigmentos carotenóides em Gonyaulax polyedra (Dinophyceae)
O dinoflagelado unicelular marinho fotossintetizante Gonyaulax polyedra tem sido utilizado como modelo para o estudo de relógios biológicos. Neste organismo já foram descritos os ritmos de: migração vertical, divisão celular, atividade de superóxido dismutase e nitrato redutase, bioluminescência e capacidade fotossintética. Investigamos a variação
Publicado em: 2000
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10. BIOSYNTHESIS OF YEAST CAROTENOIDS
Simpson, Kenneth L. (University of California, Davis), T. O. M. Nakayama, and C. O. Chichester. Biosynthesis of yeast carotenoids. J. Bacteriol. 88:1688–1694. 1964.—The biosynthesis of carotenoids was followed in Rhodotorula glutinis and in a new strain, 62-506. The treatment of the growing cultures by methylheptenone, or ionone, vapors permitted observa
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11. Phytochrome-mediated Carotenoids Biosynthesis in Ripening Tomatoes 1
Red light induced and far red light inhibited carotenoid biosynthesis in ripening tomatoes (Lycopersicon esculentum Mill.) when compared to controls kept in the dark. Red illumination following far red illumination reversed the inhibitory action of far red light on carotenoid biosynthesis, suggesting a phytochrome-mediated process. Quantitation of individual
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12. Elucidation of the Erwinia uredovora carotenoid biosynthetic pathway by functional analysis of gene products expressed in Escherichia coli.
The most important function of carotenoid pigments, especially beta-carotene in higher plants, is to protect organisms against photooxidative damage (G. Britton, in T. W. Goodwin, ed., Plant Pigments--1988, 1988; N. I. Krinsky, in O. Isler, H. Gutmann, and U. Solms, ed., Carotenoids--1971, 1971). beta-Carotene also functions as a precursor of vitamin A in ma