Influence of TiO₂ Nanoparticles on Growth and Phenolic Compounds Production in Photosynthetic Microorganisms

Table 2

Total polyphenols content both in the medium (extracellular) and inside the cells (intracellular) and polyphenols productivity () for each kind of photosynthetic microorganism treated with TiO₂ NPs.

Sample	C. vulgaris			H. pluvialis			A. platensis
	Extracellular concentration	Intracellular concentration	(mg L^−1 days^−1)	Extracellular concentration	Intracellular concentration	(mg L^−1 days^−1)	Extracellular concentration	Intracellular concentration	(mg L^−1 days^−1)
	(mg )	(mg )		(mg )	(mg )		(mg )	(mg )
Control	12.41 ± 1.20^a	4.76 ± 1.14^a	10.14 ± 0.60^a	94.97 ± 7.06^b	2.50 ± 0.91^a	13.02 ± 0.12^a	12.31 ± 0.72^a	5.10 ± 0.14^a	2.26 ± 0.06^b
TiO2 15% N doped	11.54 ± 1.60^a	3.71 ± 0.23^a	8.54 ± 0.22^a	65.22 ± 1.59^a	6.60 ± 0.93^b	9.01 ± 0.25^b	67.98 ± 1.97^c	1.30 ± 0.09^c	1.04 ± 0.04^c
TiO2 anatase	11.36 ± 0.65^a	3.95 ± 0.34^a	8.31 ± 0.22^a	116.13 ± 3.76^c	2.20 ± 0.24^a	13.01 ± 0.52^a	27.97 ± 5.19^b	3.90 ± 0.82^b	5.87 ± 0.06^a

Means () ± standard deviation with different letters (a–c) in the same column are significantly different ().
Mg  = milligrams per gram of dried biomass.