Lignin is an attractive feedstock for low molecular weight biobased phenols using depolymerization strategies such as reductive catalytic fractionation or fast pyrolysis. Such often yield a product mixture enriched in lignin-derived monomers with methoxy substituents. Selective hydrodeoxygenation (HDO) effective methodology to demethoxylate these into valuable alkylated phenols. Here, we report...

The ratio of K(39) / K(41) appears to be lower in the sap of Valonia and Nitella than in the environment, indicating that the living cell can separate these isotopes to some extent. Experiments with a mixture of guaiacol and p-cresol suggest that a similar separation may occur here but further experiments are needed.

GOAL, SCOPE AND BACKGROUND Elevated concentrations of copper in the environment result in accumulation of the metal in plants and cause an increase in reactive oxidative species (ROS). The first response to elevated amounts of ROS is increased levels of enzymatic and non-enzymatic antioxidants that reduce oxidative stress. The aim of our study was to evaluate the early stages of antioxidative r...

The effects on Valonia of guaiacol and hexylresorcinol are similar but the latter is more effective. Both substances lower or abolish the potassium effect; i.e., the ability of the cell to distinguish electrically between Na(+) and K(+). Both substances change the order of mobilities so that v(Cl) > u(Na) becomes u(Na) > v(Cl) or u(Na) = v(Cl).

Carambola is a fruit grown in tropical and subtropical regions of the world. Natural antioxidants including vitamin C, carotenoids, certain phenolic substances are abundant carambola fruit. As support health by acting as nutraceutical functional food additives, they help preserve preventing oxidation processes. The various organic or inorganic substrates hydrogen peroxide peroxides terminal oxi...