Relations Between the Phenolic Composition and Free Radical Scavenging, and Antibacterial Activities of Red Wines from Different Cultivars of Vitis vinifera L.

Figures & data

Table 1 Content of total phenolics, tartaric esters, flavonols, monomeric anthocyanins, polymeric color, and some relevant parameters in selected red wines ^a

Wine and vintage	Grape varieties	Alcohol content (vol%)	pH value	Total phenolics (mg/L)	Tartaric esters (mg/L)	Flavonols (mg/L)	Monomeric anthocyanins (mg/L)	Polymeric color (%)	Hue (absorb. units)
Medjas, 2008	Merlot, Gamay, P. Noir	11.5	2.85	1533.05 ± 1.14	256.65 ± 1.04	138.17 ± 1.21	42.76 ± 0.78	67.05 ± 0.51	0.9631
Kratosija, 2008	Kratošija	11.0	2.80	1497.70 ± 2.05	194.66 ± 1.55	126.39 ± 1.42	41.57 ± 0.53	67.39 ± 0.43	0.8514
Vranac, 2008	Vranac	11.0	2.78	1492.65 ± 2.03	173.07 ± 1.53	109.34 ± 0.46	41.24 ± 0.85	66.43 ± 1.03	0.9352
Crno, 2008	Prokupac, Vranac, Gamay	11.2	2.87	1482.87 ± 2.20	172.46 ± 2.04	109.05 ± 0.71	40.70 ± 0.52	67.60 ± 0.81	0.9552
As, 2008	Prokupac, Vranac, Gamay	11.0	2.86	1480.10 ± 2.06	171.30 ± 1.81	108.62 ± 1.04	40.50 ± 0.44	67.88 ± 0.42	0.9524
^aData are the means ± standard deviation values (n = 3).

Table 2 Correlation coefficients (r ²) between phenolic constituents and free radical scavenging and antibacterial activities in selected red wines

	Total phenols	Tartaric esters	Flavonols	Monomeric anthocyanins
Radical scavenging activity	0.9737	0.9980	0.8938	0.9239
Antibacterial activity against S. aureus strain	0.7617	0.5576	0.7929	0.8550

Figure 1 Relationship between radical scavenging (▪) and antibacterial (•) activity against S. aureus strain and total phenolic content of selected wine samples.

Figure 2 Relationship between radical scavenging (▪) and antibacterial (•) activity against S. aureus strain and tartaric esters of selected wine samples.

Figure 3 Relationship between radical scavenging (▪) and antibacterial (•) activity against S. aureus strain and flavonols of selected wine samples.

Figure 4 Relationship between radical scavenging (▪) and antibacterial (•) activity against S. aureus strain and monomeric anthocyanins of selected wine samples.