Research Article
Hydrothermal Pretreatment of Date Palm (Phoenix dactylifera L.) Leaflets and Rachis to Enhance Enzymatic Digestibility and Bioethanol Potential
Figure 3
Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) of date palm leaflets and rachis. (a) FTIR spectra of the date palm leaflets in the range of 3,500 to 500 cm−1. The black line represents the leaflets. The red line, yellow line, blue line, and green line represent the pretreated leaflets at 180°C, 190°C, 200°C, and 210°C, respectively. (b) FTIR spectra of the date palm rachis in the range of 3,500 to 500 cm−1. The black line represents the rachis. The red line, yellow line, blue line, and green line represent the pretreated leaflets at 180°C, 190°C, 200°C, and 210°C, respectively.
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