## 3 Results and Discussion
### Antioxidant Activity and Vitamin C, Total Polyphenol, Chlorophyll, and Carotenoid Content
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline  & **1** & **2** & **3** & **4** & **S1** & **S2** & **S3** & **S4** \\ \hline Vitamin C & & & & & & & & \\ mg:100 g\({}^{-1}\) & 37.84 \(\pm\) 1.09 d  & 39.02 \(\pm\) 1.12 c  & 41.21 \(\pm\) 0.99 k  & 45.04 \(\pm\) 1.15 a  & 34.16 \(\pm\) 1.12 e  & 28.46 \(\pm\) 1.05 f  & 37.44 \(\pm\) 1.13 d  & 29.41 \(\pm\) 1.09 f  \\ F & & & & & & & & \\ Phenolics, & & & & & & & & \\ mg:100 g\({}^{-1}\) & 60.74 \(\pm\) 094 d  & 65.94 \(\pm\) 0.81 k  & 58.89 \(\pm\) 1.53 d  & 70.36 \(\pm\) 2.63 b  & 69.53 \(\pm\) 0.88 b  & 75.47 \(\pm\) 0.74 a  & 69.80 \(\pm\) 0.75 b  & 74.27 \(\pm\) 2.04 a  \\ Chlorophyll & & & & & & & & \\ a + b  & 116.9 \(\pm\) 4.23 e  & 161.7 \(\pm\) 4.57 b  & 128.6 \(\pm\) 3.77 d  & 173.1 \(\pm\) 6.29 a  & 106.1 \(\pm\) 3.37 f  & 141.7 \(\pm\) 2.36 c  & 115.5 \(\pm\) 1.52 e  & 143.8 \(\pm\) 6.29 c [FONOTE:d]Footnote f: footnotemark: [ENDFOOTNOTE] \\ FM & & & & & & & & & \\ Carotenoids & & & & & & & & & \\ mg:100 g\({}^{-1}\) & 4.94 \(\pm\) 0.04 f  & 11.23 \(\pm\) 1.03 b  & 13.87 \(\pm\) 0.27 a  & 9.43 \(\pm\)0.29 c  & 3.82 \(\pm\) 0.09 g  & 10.92 \(\pm\) 0.97 b  & 6.29 \(\pm\) 0.42 e  & 8.54 \(\pm\) 0.11 d  \\ FM & & & & & & & & & \\ ABTSuMol-g\({}^{-1}\) & 1.26 \(\pm\) 0.02 e  & 1.46 \(\pm\) 0.02 d  & 1.70 \(\pm\) 0.02 c  & 1.87 \(\pm\) 0.04 b  & 1.63 \(\pm\) 0.01 c  & 2.06 \(\pm\) 0.01 b  & 1.99 \(\pm\) 0.01 b  & 2.63 \(\pm\) 0.04 a  \\ DFPTHMol-g\({}^{-1}\) & 6.33 \(\pm\) 0.06 e  & 6.80 \(\pm\) 0.02 e  & 12.57 \(\pm\) 0.11 b  & 15.50 \(\pm\) 0.04 a  & 7.99 \(\pm\) 0.04 d  & 10.56 \(\pm\) 0.11 c  & 13.54 \(\pm\) 0.10 b  & 16.27 \(\pm\) 0.08 a  \\ FM & & & & & & & & & \\ \hline \end{tabular}  
* 1. Control without sulfur fertilization; 2. 30 kg S-ha\({}^{-1}\) elementary sulfur; 3. 30 kg S-ha\({}^{-1}\) ammonium sulfate; 4. 30 kg S-ha\({}^{-1}\) potassium sulfate; S1. control without sulfur fertilization; S2. 30 kg S-ha\({}^{-1}\) elementary sulfur; S3. 30 kg S-ha\({}^{-1}\) ammonium sulfate; and S4. 30 kg S-ha\({}^{-1}\) potassium sulfate. Mean values with different letters (a-g) within the same row were statistically different (p = 0.05). Values expressed as the mean \(\pm\) standard deviation.  
\end{table} 
Table 1: Antioxidant activity and vitamin C, polyphenol, chlorophyll a and b, and carotenoid content for fresh and stored white cabbage. or 100 mg/L of sulfate were 20.7%, 40.4%, and 40.8% higher, respectively, than those of 7-day-old control sprouts. However, the authors observed no detectable effects on the 4-methoxy-glucobrassicin or vitamin C contents. Antioxidant activity was also higher in cabbages subjected to fertilization than in the control. Chlorophyll and carotenoid content decreased after storage in all cases, but these losses were inconsistent. The highest chlorophyll loss (of 17%) was observed in cabbage grown using potassium sulfate, while the lowest was seen in cabbage grown using ammonium sulfate. A similar phenomenon was observed for vitamin C content, with the highest loss detected in stored cabbage grown using potassium sulfate, and the lowest in stored crops grown using ammonium sulfate. Exactly the opposite was found for the loss in carotenoids, with the highest decrease (of 61%) observed in crops from the plot treated with ammonium sulfate, and the lowest (of 16%) in crops whose fertilization method involved potassium sulfate. Antioxidant properties, determined both as ABTS and DPPH radical-scavenging activities, were highest in cabbage harvested from the plot treated with potassium sulfate. Slightly lower activities were found in cabbage from the control plot, which also exhibited the lowest bioactive component content determined. Other studies have also reported that the antioxidant activity of Brassicaceae increased when sulfur was supplied to the plants [27]. Following storage, there was an increase in both ABTS and DPPH radical-scavenging activities. DPPH increased significantly in cabbages from plots where elemental sulfur was used as fertilizer.