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Table 1 Lipid (%, measured using the Bligh and Dyer method), carbohydrate (%, measured using anthrone reagent and glucose as standard), protein (%, measured using Bradford method and bovine serum albumin as standard), total phenolic content (TPC, expressed as gallic acid equivalent (mg/g GAE)) and total flavonoids content (TFC, expressed as quercetin (mg/g)) of microalgae crude extracts (MCEs)

From: Phytochemical screening, metabolite profiling and enhanced antimicrobial activities of microalgal crude extracts in co-application with silver nanoparticle

Microalgae species

Lipid (%)

Total carbohydrate (%)

Total protein (%)

TPC, mg/g Gallic acid equivalent (GAE)

TFC, mg/g Querecetin equivalent (QE)

Methanol

Chloroform

Hexane

Ethanol

Water

Methanol

Chloroform

Hexane

Ethanol

Water

N. oculata

23.7 a ± 0.99

17 a ± 0.01

9.6 a ± 0.05

58.1 a ± 0.042

24.5 b ± 0.01

7.1 c ± 0.01

13.6 d ± 0.01

5.8 e ± 0.06

44.83 a ± 0.04

22.5 b ± 0.002

14.7 c ± 0.02

10.9 d ± 0.001

5.9 e ± 0.001

T. suecica

15.9 b ± 0.76

16.9 a ± 0.01

8.7 b ± 0.06

44.3 a ± 0.032

17.0 b ± 0.01

0.8 c ± 0.001

15.2 d ± 0.001

7.1 e ± 0.06

97.67 a ± 0.07

25.7 b ± 0.003

1.0 c ± 0.001

15.5 d ± 0.01

9.9 e ± 0.02

Chlorella sp.

30.38 c ± 0.92

15.5 b ± 0.01

6.9 c ± 0.07

35.7 a ± 0.031

59.4 b ± 0.02

0.7 c ± 0.01

17.4 d ± 0.001

5.9 e ± 0.06

55.84 a ± 0.062

39.1 b ± 0.004

13.8 c ± 0.06

17.3 d ± 0.001

2.2 e ± 0.02

  1. Values are expressed as mean ± standard deviation, n = 3; TPC total phenolic content, TFC total flavonoid content
  2. For lipids, carbohydrate and protein, for each column, different letters indicate significantly different (p < 0.05)
  3. For TPC and TFC, a–e values in the same line sharing different letters are significantly different (p < 0.05)