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- W1900517909 abstract "Variations in the biochemical profile of the marine microalga DUl1aliella tertiolecta (Butcher) cultured with different nutrient concentrations and ure a as a nitrogen source. Cultures of the marine microalga Dwwliella tertiolecta were grown in a urea-base d medium, using four nutrient concentrations following a geometrical progression of order 2, expressed as x I, x2, x4 and x8, in order to obtain a maximum biomass production and to find out it s biochemical variability. The nutrient concentration had littl e effect on the growth rate in th e lo gari thmic phase, with values between 0.40 and 0.44 doublings.day-I. Maximum ce llul ar densities of7.53x10 6 and 7.96x106 cells.ml- I were obtained in x2 and x4 cultures (corresponding to 2 and 4 mM of urea). Differences in biochemical composition were found in function of the nutrient concentration. Protein content reached maxi mum values in th e station ary phase in x4 and x8 cultures, with 29.56 and 29.28 pg.ceW I. The maximum value of carbohydrates was obtained in xl cultures, with 14.38 pg.cell- I. Maxi mum lipids per cell were obtained in the statio nary phase in cultures with the higher nutrient concentration asssayed (x8), with 23.12 pg.ceW I. Cultures at the lower nutri ent concentration assayed (xl) showed a nitrogen deficiency, with cell s" @default.
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- W1900517909 date "1994-01-01" @default.
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- W1900517909 title "Variations in the biochemical profile of the marine microalga Dunaliella tertiolecta (Butcher) cultured with different nutrient concentrations and urea as a nitrogen source" @default.
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