## 3. Results and Discussion
### Monosaccharide Composition of FPs  
The monosaccharide composition of FPs based on HPLC analysis is shown in Table 2 and Figure 1. The four types of FPs obtained through drying consist of six monosaccharides: mannose, rhamnose, galacturonic acid, glucose, galactose and arabinose, with no detection of glucuronic acid or xylose. Among these six monosaccharides, arabinose, galacturonic acid and galactose are the predominant components, and all polysaccharides are classified as heteropolysaccharides. Although the four types of FPs share an identical monosaccharide composition, they exhibit significant differences in molar ratios, highlighting the substantial influence of drying methods on the monosaccharide composition and content of FPs. The molar ratio of galactose follows the order: FPF \(<\) FPFI \(<\) FPH \(<\) FPV. Variations in drying methods also lead to FPV having the highest arabinose content and the lowest levels of rhamnose and glucose. In contrast, the molar ratio of mannose in FPH and FPFI is elevated compared to FPF and FPV. Furthermore, analysis of uronic acids in the FPs revealed that galacturonic acid is the predominant uronic acid present. \begin{table}
\begin{tabular}{l l l l l} \hline
**Item** & **FPF** & **FPV** & **FPFI** & **FPH** \\ \hline Extraction yields (\%) & 2.49 \(\pm\) 0.16 \({}^{\text{a}}\) & 1.66 \(\pm\) 0.13 \({}^{\text{c}}\) & 1.94 \(\pm\) 0.12 \({}^{\text{b}}\) & 1.57 \(\pm\) 0.21 \({}^{\text{c}}\) \\ Neutral sugar (\%) & 60.04 \(\pm\) 0.80 \({}^{\text{b}}\) & 62.84 \(\pm\) 0.93 \({}^{\text{a}}\) & 58.09 \(\pm\) 0.94 \({}^{\text{c}}\) & 63.29 \(\pm\) 0.97 \({}^{\text{a}}\) \\ Uronic acid (\%) & 25.56 \(\pm\) 0.54 \({}^{\text{a}}\) & 14.34 \(\pm\) 0.49 \({}^{\text{c}}\) & 19.84 \(\pm\) 0.29 \({}^{\text{b}}\) & 13.51 \(\pm\) 0.34 \({}^{\text{c}}\) \\ Protein (\%) & 0.96 \(\pm\) 0.18 \({}^{\text{b}}\) & 0.98 \(\pm\) 0.10 \({}^{\text{b}}\) & 1.13 \(\pm\) 0.07 \({}^{\text{b}}\) & 1.33 \(\pm\) 0.04 \({}^{\text{a}}\) \\ \hline \end{tabular} Note: Data are expressed as means \(\pm\) SD (\(n=3\)). Different superscript lowercase letters (a–c) are significantly different (\(p<0.05\)).  
\end{table} 
Table 1: Effects of different drying methods on the chemical properties. [PERSON] et al. [24] conducted monosaccharide composition analysis on polysaccharides from Xinjiang figs, revealing that fig polysaccharides are heteropolsaccharides composed of rhamnose, arabinose, galactose, glucose, and mannose, with arabinose and galactose being the primary monosaccharides. This finding aligns closely with our research. The sequential decrease in the molar ratio of galactose under FD, FID, HD and VD treatments may be attributed to variations in drying temperatures, as elevated temperatures tend to increase the molar ratio of galactose. [PERSON] et al. [16] reported that the molar ratios of galactose and arabinose in lithti pulp polysaccharides increased with rising drying temperatures. However, the increase in temperature did not result in differences in the molar ratio of arabinose between FPF and FPFI, possibly due to changes in arabinose content or related to heat transfer methods and rates. Although FID involves higher temperatures, its rapid heat transfer rate may mitigate the impact of temperature on arabinose. The higher molar ratio of mannose in FPH and FPFI compared to FPF and FPV might be due to the vacuum environment during the drying process of FPF and FPV, which results in lower oxygen concentrations and thus alters the molar ratio of mannose. [PERSON] et al. [37] reported that dried bamboo shoot polysaccharides with four different methods, which contained different molar ratios of arabinose, galactose and glucose. [PERSON] et al. [35] reported that different drying methods altered the hydroxyl groups and intermolecular hydrogen bonding of polysaccharides through changes in temperature and oxygen concentration, resulting in different molar ratios of monosaccharides.