Table 2 Major functional groups of active components based on the peak value of Fourier transform infrared.
Seaweed species | Extracts | Major functional groups | ||||||
|---|---|---|---|---|---|---|---|---|
Phenol | Carboxylic acids | Alkoxy | Aromatics | Alkene | Amides/amines | Sulfonate | ||
P. tetrastromatica | Methanol | \(+\) | \(+\) | \(+\) | \(-\) | \(+\) | \(-\) | \(+\) |
Ethanol | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(-\) | \(+\) | |
Water | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(-\) | |
G. tenuistipitata | Methanol | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(-\) | \(+\) |
Ethanol | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(-\) | |
Water | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(+\) | \(-\) | |
