Treatments Hot Water extracts Ethanol extracts
Total Total
carbohydrate% Sulfate% carbohydrate% Sulfate%
S.platensis grown at 45 ppm N 7.60* 2.35* 8.06* 5.02*
  ± 0.200 ± 0.020 ± 0.122 ± 0.015
S.platensis grown at 128 ppm N 8.60* 3.13* 9.30* 5.40*
  ± 0.200 ± 0.120 ± 0.200 ± 0.200
S.platensis grown at 293 ppm N 10.30* 3.26* 10.80* 2.13*
  ± 0.200 ± 0.020 ± 0.300 ± 0.162
S.platensis grown at 412 ppm N 17.83 1.77 12.77 4.13
  ± 0.252 ± 0.153 ± 0.153 ± 0.153
S.platensis grown at 622 ppm N 9.40* 0.94* 13.16* 4.05
  ± 0.200 ± 0.064 ± 0.216 ± 0.02
Data are means of triplicate ±SD. *The mean difference is significant at P≤ 0.05
Table 2: Effect of extraction methods of sulfated polysaccharides of S.platensis grown under different nitrogen concentrations on total carbohydrates.
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