Chemical composition of African mahogany ( K. ivorensis A. Chev ) extractive and tannin structures of the bark by MALDI-TOF

Tannins extraction from Pinus pinaster and Acacia dealbata bark with applications in the industry

“…This opens the possibility of knowing phenolic and anthocyanin content by knowing the absorbance of the samples, by using methods such as Folin-Ciocalteu and acid/buthanol. This is in concordance with other studies that used the same techniques to determine tannin composition of tree species (Antoine et al, 2004;Bikoro Bi Athomo, 2018;Pelozo and Mello, 2008).…”

Phytochemical screening and antioxidant activity of some medicinal plants’ crude juices

“…The condensed tannins of pomegranate leaves and peels, fig leaves, guava leaves and olive leaves crude juices was evaluated by the vanillin assay as described by Bikoro Bi Athom et al [ 10 ]. The absorbance was read at 500 nm utilizing a UV–vis spectrophotometer (Shimadzu, UVmini-1240, Japan) against the reagent blank.…”

Anthocyanins, Phenolic Compounds, and Antioxidants from Extractions of Six Eucalyptus Species

“…However, there are other factors that should be taken into consideration. Particle size has been shown to influence extraction efficiency: the smallest the size of particle samples, the highest the percentage of yields obtained [34,36,48]. Solvent proportion could also improve polyphenol contents by 50%, as stated by Dos Santos-Ferreira et al [43], Pereira et al [44], and Rhazi et al [49].…”

“…Anthocyanins measurements were done by the acid hydrolysis in butanol method [34]. The absorbance was recorder at 530 nm, absorption maximum observed to anthocyanin [30], and the results were expressed as based on cyanine equivalent.…”