The composition and antioxidative activity of whole potato tubers from
five Korean cultivars, three peels
from one cultivar, and eight pulps (cortexes) after peeling from six different cultivars were evaluated.
Whole tubers were sectioned into three parts followed by analysis of the peels and pulps of each part. The
following characteristics were determined: the dimensions and water content of whole tubers;
nutritional protein content consisting of protein and free amino acids by an automated Kjeldahl nitrogen
assay; free non-protein amino acids, metabolites, and fructose, glucose, and sucrose content by HPLC;
phenolic compounds by HPLC and LC/MS; total phenolics and
flavonoids by colorimetry; and
antioxidative properties by ABTS, DPPH, and FRAP assays. The results demonstrate differences and
similarities in the content of nutritional and bioactive compounds and in their bioactivities from whole
potatoes, peels, and pulps. The present study reports for the
first time the analysis of multiple potato
nutrients and bioactive components as well the antioxidative properties of whole potatoes, peels, and
pulps derived from the same tubers. The described methods are expected to facilitate the analysis of
commercial and newly-developed potato cultivars, peels, and pulps and relate their composition and
antioxidative activities to their reported nutritional, health-promoting, and industrial properties.
Published by Elsevier Inc
The composition and antioxidative activity of whole potato tubers fromfive Korean cultivars, three peelsfrom one cultivar, and eight pulps (cortexes) after peeling from six different cultivars were evaluated.Whole tubers were sectioned into three parts followed by analysis of the peels and pulps of each part. Thefollowing characteristics were determined: the dimensions and water content of whole tubers;nutritional protein content consisting of protein and free amino acids by an automated Kjeldahl nitrogenassay; free non-protein amino acids, metabolites, and fructose, glucose, and sucrose content by HPLC;phenolic compounds by HPLC and LC/MS; total phenolics andflavonoids by colorimetry; andantioxidative properties by ABTS, DPPH, and FRAP assays. The results demonstrate differences andsimilarities in the content of nutritional and bioactive compounds and in their bioactivities from wholepotatoes, peels, and pulps. The present study reports for thefirst time the analysis of multiple potatonutrients and bioactive components as well the antioxidative properties of whole potatoes, peels, andpulps derived from the same tubers. The described methods are expected to facilitate the analysis ofcommercial and newly-developed potato cultivars, peels, and pulps and relate their composition andantioxidative activities to their reported nutritional, health-promoting, and industrial properties.Published by Elsevier Inc
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