Abstract Twelve hyper-? carotene-producing strains of algae assigned to the genus Dunaliella salina have been isolated from various hypersaline environments in Israel, South Africa, Namibia and Spain. Intron-sizing SSU rDNA phylogenetic analysis these isolates were undertaken using four commonly employed markers for genotyping, LSU rDNA, ITS, rbc L tuf A their application study evaluated. Novel...

Neither Dunaliella cells grown with 5% CO(2) nor their isolated chloroplasts had a CO(2) concentrating mechanism. These cells primarily utilized CO(2) from the medium because the K((0.5)) (HCO(3) (-)) increase from 57 micromolar at pH 7.0 to 1489 micromolar at pH 8.5, where as the K((0.5)) CO(2) was about 12 micromolar over the pH range. After air adaptation for 24 hours in light, a CO(2) conce...

Global biodiversity losses provide an immediate impetus to elucidate the relationships between biodiversity, productivity and stability. In this study, we quantified the effects of species richness and species combination on the productivity and stability of phytoplankton communities subject to predation by a single rotifer species. We also tested one mechanism of the insurance hypothesis: whet...

Problem statement: The aim of this study was to find the empirical model that describes the growth kinetics of Dunaliella salina, with low production cost and to estimate parameters of this model. Approach: In this study the strain of D. salina UTEX 200 was cultivated in seawater (0.5 M NaCl) at room temperature with agitation of 150 rpm and luminous intensity of 60 mmols.m-2.s-1. The synthetic...

BACKGROUND Developing algal industries in saline-alkali areas is necessary. However, suitable strains and optimal production conditions must be studied before widespread commercial use. OBJECTIVES The effects of light, temperature, KNO3, and CO(NH2)2 on beta-carotene and biomass accumulation were compared and evaluated in order to provide scientific guidance for commercial algal production in...

A calcium-dependent protein kinase was partially purified and characterized from the green alga Dunaliella salina. The enzyme was activated at free Ca2+ concentrations above 10(-7) molar. and half-maximal activation was at about 3 x 10(-7) molar. The optimum pH for its Ca(2+)-dependent activity was 7.5. The addition of various phospholipids and diolein had no effects on enzyme activity and d...

Microalgal biomass is a promising alternative and renewable substrate for bioenergy production. The main problem its commercial application to obtain keep high level of production by providing microalgae with appropriate conditions growth. aim this study was determine optimal culture such as temperature, photoperiod, pH. amount gravimetry, optical density spectrophotometry, productivity were an...

The unicellular, wall-less alga Dunaliella salina has been shown to contain an array of proteins modified by the covalent attachment of fatty acids. Myristic acid (14:0) comprised approximately 80% by weight of the protein-linked acyl groups in samples derived from cells cultured in medium containing 1.7 molar NaCl and 93% in samples from cells grown in medium containing 3.0 molar NaCl. Palmiti...