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Determination of biomass dry weight of marine microalgae

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Abstract

Total biomass dry weight (DW) and ash free dry weight (AFDW) of five species of marine microalgae, Dunaliella sp., Isochrysis galbana, Nannochloropsis sp., Nitzschiaclosterium and Porphyridium cruentum, retained on filter paper, were determined. Dunaliella and Isochrysis cells have no cell wall; Nannochloropsis, Nitzschia and Porphyridium possess a cell wall and Nitzschia and Porphyridium cells are covered by silica and mucilage coating, respectively. In all these algae, DW of non-washed samples was at least 1.2 times higher than those washed by distilled water,0.9% sodium chloride, 0.5 M ammonium formate or 0.5 M ammonium bicarbonate. DW of 0.9% sodium chloride washed samples was more than 0.8 times higher than the other three washed samples. In most of the cases, there was no significant difference between DW of samples washed by ammonium formate and ammonium bicarbonate solutions (p>0.05). The AFDW of the non-washed algal samples was about twice that washed samples, and could be accounted for by volatile component in the sea water medium. Isotonic solution of ammonium bicarbonate is a satisfactory washing agent for algal cells for dry weight determination.

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Authors and Affiliations

  1. Department of Microbiology, Faculty of Medicine, National University of Singapore, Lower Kent Ridge Road, Singapore

    C. J. Zhu & Y. K. Lee

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  1. C. J. Zhu
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  2. Y. K. Lee
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Zhu, C.J., Lee, Y.K. Determination of biomass dry weight of marine microalgae. Journal of Applied Phycology 9, 189–194 (1997). https://doi.org/10.1023/A:1007914806640

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  • DOI: https://doi.org/10.1023/A:1007914806640

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