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	Provedor de dados Biol. Res. (2) Autor GONZÁLEZ,MARIELA A (2) CIFUENTES,ANA S (1) GONZÁLEZ,NELSON (1) GÓMEZ,PATRICIA I (1) HOENEISEN,MARITZA (1) VARGAS,SILVIA (1) Mais... Palavra-chave -carotene ß-carotene temperature irradiance (1) Astaxanthin (1) Carotenogenesis (1) Dunaliella salina strains growth &#ß (1) Growth (1) Haematococcus pluvialis (1) Mais... Tipo do documento Journal article (2) Ano 2005 (1) 2003 (1) País Chile (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última The effect of temperature and irradiance on the growth and carotenogenic capacity of seven strains of Dunaliella salina (Chlorophyta) cultivated under laboratory conditions Biol. Res. GÓMEZ,PATRICIA I; GONZÁLEZ,MARIELA A. The carotenogenic microalga Dunaliella salina is cultivated as a natural source of ß-carotene. The 9-cis isomer of ß-carotene is found only in natural sources having commercial advantages over the all-trans isomer due to its high liposolubility and antioxidant power. High irradiance appears to stimulate specifically all-trans ß-carotene accumulationin D. salina, whereas low temperature apparently elicits ß-carotene and 9-cis ß-carotene production. We studied the effect of temperature and irradiance on the growth and the carotenogenesis of three Chilean (CONC-001, CONC-006 and CONC-007) and four non-Chilean (from Mexico, China, Australia and Israel) strains of D. salina cultivated under two photon flux densities (40 and 110 μmol photons.m-2.s-1)... Tipo: Journal article Palavras-chave: Dunaliella salina strains growth &#ß; -carotene ß-carotene temperature irradiance. Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000200005 Optimization of biomass, total carotenoids and astaxanthin production in Haematococcus pluvialis Flotow strain Steptoe (Nevada, USA) under laboratory conditions Biol. Res. CIFUENTES,ANA S; GONZÁLEZ,MARIELA A; VARGAS,SILVIA; HOENEISEN,MARITZA; GONZÁLEZ,NELSON. The microalga Haematococcus pluvialis Flotow is one of the natural sources of astaxanthin, a pigment widely used in salmon feed. This study was made to discover optimal conditions for biomass and astaxanthin production in H. pluvialis from Steptoe, Nevada (USA), cultured in batch mode. Growth was carried out under autotrophic (with NaNO3, NH4Cl and urea) and mixotrophic conditions (with 4, 8, 12 mM sodium acetate) under two photon flux densities (PFD) (35 and 85 µmol m-2 s-1). The carotenogenesis was induced by 1) addition of NaCl (0.2 and 0.8 %), 2) N-deprivation and 3) high PFD (150 µmol m-2 s-1). Total carotenoids were estimated by spectrophotometry and total astaxanthin by HPLC. Ammonium chloride was the best N-source for growth (k=0.7 div day-1,... Tipo: Journal article Palavras-chave: Astaxanthin; Carotenogenesis; Growth; Haematococcus pluvialis. Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000300006 Registros recuperados: 2 Primeira ... 1 ... Última

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