Total Oxidant Scavenging Capacity of Euterpe oleracea Mart. (Açaí) Seeds and Identification of Their Polyphenolic Compounds Export

@article{citeulike:3453017, abstract = {The antioxidant capacity of methanol and ethanol seed extracts from Euterpe oleracea Mart. (a\c{c}a\'{\i}) against the reactive oxygen species (ROS) peroxyl radicals, peroxynitrite, and hydroxyl radicals was studied with the total oxidant scavenging capacity (TOSC) assay in a modified and automated version. Cold methanol digestion was the most efficient extraction method with respect to the antioxidant capacity. The extracts exhibit good antioxidant capacity against peroxyl radicals, similar to the capacity of the pulp. The antioxidant capacity against peroxynitrite and hydroxyl radicals is even higher. The main antioxidants identified by HPLC-MS and HPLC-CEAD are five different procyanidins (di- through pentamers); furthermore, protocatechuic acid and epicatechin were identified as minor compounds. Determination of TOSC values of HPLC seed extract fractions indicates that the procyanidins contribute substantially to the overall antioxidant capacity. In addition, however, other compounds that have not yet been identified are responsible for a large part of the observed antioxidant capacity.}, author = {Rodrigues, Roberta B. and Lichtenth\"{a}ler, Ramona and Zimmermann, Benno F. and Papagiannopoulos, Menelaos and Fabricius, Heinz and Marx*, Friedhelm}, citeulike-article-id = {3453017}, day = {12}, journal = {J. Agric. Food Chem}, keywords = {acai, antioxidants, palm\_berry, polyphenols}, month = {May}, number = {12}, pages = {4162--4167}, posted-at = {2008-10-27 12:51:25}, priority = {3}, title = {Total Oxidant Scavenging Capacity of Euterpe oleracea Mart. (A\c{c}a\'{\i}) Seeds and Identification of Their Polyphenolic Compounds}, volume = {54}, year = {2006} }

TY - JOUR ID - citeulike:3453017 L3 - citeulike-article-id:3453017 N2 - The antioxidant capacity of methanol and ethanol seed extracts from Euterpe oleracea Mart. (açaí) against the reactive oxygen species (ROS) peroxyl radicals, peroxynitrite, and hydroxyl radicals was studied with the total oxidant scavenging capacity (TOSC) assay in a modified and automated version. Cold methanol digestion was the most efficient extraction method with respect to the antioxidant capacity. The extracts exhibit good antioxidant capacity against peroxyl radicals, similar to the capacity of the pulp. The antioxidant capacity against peroxynitrite and hydroxyl radicals is even higher. The main antioxidants identified by HPLC-MS and HPLC-CEAD are five different procyanidins (di- through pentamers); furthermore, protocatechuic acid and epicatechin were identified as minor compounds. Determination of TOSC values of HPLC seed extract fractions indicates that the procyanidins contribute substantially to the overall antioxidant capacity. In addition, however, other compounds that have not yet been identified are responsible for a large part of the observed antioxidant capacity. IS - 12 JF - J. Agric. Food Chem EP - 4167 TI - Total Oxidant Scavenging Capacity of Euterpe oleracea Mart. (Açaí) Seeds and Identification of Their Polyphenolic Compounds VL - 54 SP - 4162 KW - acai KW - antioxidants KW - palm_berry KW - polyphenols AU - Rodrigues, Roberta AU - Lichtenthäler, Ramona AU - Zimmermann, Benno AU - Papagiannopoulos, Menelaos AU - Fabricius, Heinz AU - Marx*, Friedhelm PY - 2006/05/12/ ER -