## 3 Results and Discussion
### The Extraction Conditions
The total polyphenols content was significantly higher in the MeOH extract compared to the chloroform and EtOH fractions (\(p<0.05\)). Conversely, more total flavonoids were found in the EtOH and EtOAc samples (834.7 and 844.2 CEQ/100 g DW, respectively). Polar solvents, including alcohol groups, are commonly used to extract organic compounds from natural products, including secondary plant metabolites. Due to their ability to increase cell permeability and penetrate cell interiors, these solvents tend to be more effective at extracting intracellular secondary metabolites (both polar and \"less polar\" metabolites) than non-polar solvents such as n-hexane. The non-polar solvents generally dissolve only non-polar compounds, lipophilic substances, and hydrophobic substances [47; 48]. This may explain the differences in antioxidant activity across the extracts tested in our study, where the highest antioxidant activity (DPPH) was found for EtOH-H\({}_{2}\)O extracts (84.4%), while antioxidant activity (FRAP) was the highest for ACT and MeOH extracts (1.57 and 1.49 mg/g Trolox, respectively). Correlation Coefficients of the Antioxidant Activity and Phenolic Content of the Tested Plant Extracts  
Spectrophotometric methods for determining antioxidative properties, such as the FRAP assay--ferric ion reducing antioxidant parameter and the DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging assay, are often used to study the antioxidant properties of plant-derived products [15; 17; 18]. The antioxidative property determinations made using these two methods are strongly correlated (r = 0.822) [49]. Our study found a moderate positive correlation between antioxidant activity (DPPH) and antioxidant activity (FRAP), but only for thyme (r = 0.591167) (Table 4). [PERSON] et al. [50] compared the results regarding antioxidant activity (DPPH, FRAP and CUPRAC assays), noting that DPPH produced a different value (IC\({}_{50}\)), showing poor antioxidant activity compared to CUPRAC and FRAP. Due to the differing sensitivities of DPPH, ABTS, CUPRAC, RP and FRAP, antioxidant activity measurements may vary significantly across the tests. Nevertheless, many reports have indicated that there is high correlation between these methods, especially between DPPH and FRAP [33; 50; 51]. The results of antioxidant activity assays are also affected by the type of material analyzed and the type of extract. For example, ABTS, DPPH, FRAP, and ORAC all provide similar antioxidant activity outputs for MeOH guava fruit extract, while FRAP features high reproducibility, and the highest correlation for ascorbic acid and total polyphenols content [25]. The biological activity of plant extracts is highly variable, influenced by the plant species and, especially, by the extraction technique. Temperature, time, and extraction rate are positively correlated with DPPH, FRAP, and levels of polyphenols compounds (\(p<0.05\)) [52]. The study by [PERSON] and [PERSON] [10] showed that Lamiaceae herbs are substantially richer in total polyphenols content and have higher antioxidant activity than the Apiaceae species. The strong correlations between antioxidant activity found across DPPH, ABTS, FRAP, and total polyphenols content assays confirm the major role played by phenolic compounds in determining the antioxidative properties of herbs. However, data on the correlation between phenolic compounds and antioxidant activity are far from consistent, varying with different plant materials, extraction methods, and antioxidant activity assays. [PERSON] et al. [50] report that total polyphenols content shows no correlation with flavonoid compounds but a strong correlation with antioxidant activity, whereas flavonoid compounds do not correlate with antioxidant activity. [PERSON] et al. [53] found a strong correlation between total polyphenols content, total flavonoids content, and antioxidant activity.