Physicochemical characterization of leaf extracts from Ocotea lancifolia and its effect against wood-rot fungi

Chemical Composition, Antimicrobial Activity, and Antioxidant Activity of Ocotea minarum (Nees & Mart.) Mez.

“…Other authors describe the antioxidant activity of species of the genus Ocotea [25, 29]. Comparatively, in the present study, the EEB and EEL of O. minarum showed a better antioxidant potential than other species of the same genus.…”

“…Among these, approximately 300–400 species are found in the tropical and subtropical regions [21, 22], and it has been estimated that 120–160 species are found in Brazil [23] dispersed in the biomes of Atlantic Forest and Cerrado [24]. Studies on species of the genus Ocotea have demonstrated several biological activities, such as antimicrobial [25–29], antioxidant [25, 26, 29–32], anti-inflammatory [30, 33], and antiprotozoal activities [34].…”

Phytochemistry by design: a case study of the chemical composition of Ocotea guianensis optimized extracts focused on untargeted metabolomics analysis

“…Although the temperature did not signicantly affect the Y% value, there were substantial qualitative modications on the chemical prole, as can be observed by the formation of a group representing the extractions performed at 60 C. This data may indicate a thermal degradation of metabolites as TLC revelators react with specic chemical classes and therefore their degraded products usually are not detected. 25 As most of the conventional extraction methods applied in Lauraceae phytochemical studies involve heating procedures, [34][35][36] our results emphasize that the reckless application of relatively high temperatures (above 50 C) can degrade the sample without affecting the Y%. The formation of 3 clusters even by the usage of a low resolution method, such as TLC, to evaluate the chemical prole highlights the importance of method development for untargeted metabolomics, even in wellknown botanic groups such as Lauraceae.…”

“…Though it is important, the proportion between sample and extracting solvent is not usually provided in most phytochemical studies, even in those whose data is used in metabolomics approaches. 35,36,38 The PCA of chromatographic data from groups blue and green ( Fig. 4D) qualitatively distinguish samples by the solvent composition and extraction temperature ( Fig.…”

Colour of polyurethane foams filled with wood and wood derivatives exposed to two xylophagous fungi

“…Among them, xylophagous fungi are the main decay agents due to the damage caused by their attack, which has been reported for wood-based materials. 11 Brown-rot and white-rot fungi are the main xylophagous microorganisms. The brown-rot fungi act metabolizing the holocellulose and causing a quick loss of strength in comparison to the rate of wood metabolism (mass loss), whereas the white-rot fungi can metabolize all main structural wood compounds, especially the lignin.…”