The authors of many works consider the effective protection of biological membranes against oxidation dependent on the capabilities of the polyphenolic substances binding to membranes [ 2226]6].
15, 19 As shown in other studies, polyphenolic substances contained in the extracts from apple, chokeberry, and strawberry, aside of the antioxidative, possess also many therapeutic properties.
By testing polyphenolic substances, found in grape flavourings, in vitro, scientists have discovered that grapes prevent the body from producing reactive oxygen species (ROSs), which cause cell death under ultraviolet radiation.
This approach is very suitable for studying the soil/plant interface, and for semi-quantitative analysis of the evolution of polyphenolic substances during root evolution.
Flavonoids comprise a group of polyphenolic substances that are present in most plants.
Our previous studies used chromatography to demonstrate that marigold is a good source of natural antioxidants, in particular polyphenolic substances.
Chemically, green tea contains many polyphenolic compounds, commonly known as catechins.
Because it has natural several constituents which are fucoidan and polyphenolic substances, it does a dual function as both reducing and stabilizing agent for nanoparticles.
T. conoides is rich in polyphenolic substances [36, 37] and phytochemical investigation led to the isolation of sulfated polysaccharides [30, 38].
These roles have been attributed, in part, to their biological active constituents, such as liposoluble and water-soluble vitamins (E and C, respectively) and polyphenolic substances [12].
