. 2024 Apr 3;10(7):e29122. doi: 10.1016/j.heliyon.2024.e29122

Table 6.

Total phenolic content and antioxidant activity.

Sample	Storage conditions	Antioxidant activity
Sample	Storage conditions	TPC (mg GAE/g sample)	DPPH (% scavenging)
Bougainvillea spp.	room temperature	45.44 ± 0.85^c	77.83 ± 1.71^a
	4 °C	64.13 ± 1.45^a	80.50 ± 0.68^a
	freezing temperature	56.32 ± 0.53^b	78.49 ± 0.71^a
Purified clay + Bougainvillea spp.	room temperature	91.75 ± 0.80^b	66.39 ± 1.31^a
	4 °C	94.39 ± 0.61^a	69.20 ± 1.63^a
	freezing temperature	76.32 ± 1.58^c	62.82 ± 1.49^b
Pandanus amaryllifolius Roxb.	room temperature	62.63 ± 0.46^a	50.74 ± 0.56^ab
	4 °C	63.60 ± 0.55^a	52.23 ± 2.23^a
	freezing temperature	61.06 ± 0.79^b	47.62 ± 1.70^b
Purified clay + Pandanus amaryllifolius Roxb.	room temperature	119.30 ± 2.19^a	48.79 ± 0.50^a
	4 °C	119.47 ± 2.29^a	49.35 ± 0.52^a
	freezing temperature	112.81 ± 2.70^b	45.26 ± 0.79^b
Curcuma longa L.	room temperature	63.86 ± 0.31^a	80.95 ± 0.68^a
	4 °C	64.39 ± 1.10^a	81.40 ± 0.46^a
	freezing temperature	62.28 ± 0.40^b	79.09 ± 0.93^b
Purified clay + Curcuma longa L.	room temperature	131.93 ± 2.60^b	69.36 ± 2.19^b
	4 °C	142.98 ± 2.59^a	77.72 ± 0.65^a
	freezing temperature	128.95 ± 1.25^b	69.56 ± 1.32^b

The experimental data were obtained in triplicate. The different letters in each column and the sample extract conditions indicate a significant difference (p < 0.05).