Abstract
Changes in pectin composition and solubility are part of the softening process in apples during ripening and postharvest storage. Lignification may also occur with long-term storage. In the United States, apples and onions are harvested once yearly and then stored and marketed for the next 12 months. The changes that occur in the dietary fiber content and composition in Red Delicious apples and yellow Spanish onions during storage were studied, and the loss of fiber in peeled apples was determined. Dietary fiber was extracted by the enzymatic-chemical method of Theander and Westerlund. Storage had no effect on total or insoluble fiber content of apples; Klason lignin concentration was greater in samples stored for 12 months than in those stored for 0, 4, or 8 months. Peeling reduced apple fiber concentration about 25% by decreasing neutral and acidic sugars and Klason lignin in the insoluble fraction. The total fiber content of onions increased with storage, primarily by increasing the insoluble fiber content of uronic acids. The results suggest that the standardized, environmentally controlled storage of apples, as used in Washington State, has little effect on dietary fiber content. In contrast, the less rigorously controlled storage conditions for yellow Spanish onions increases the insoluble fiber fraction and uronic acid content.
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Claims 6
Claim · model-written summary
Storage did not affect total or insoluble apple fiber.
- Taxon
- apples
Malus domesticae0 - Treatment
- Storagee0
- Outcome
- total or insoluble fiber contente0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Storage had no effect on total or insoluble fiber content of apples”
Claim · model-written summary
Apple Klason lignin was greater after 12 months than after 0, 4, or 8 months.
- Taxon
- applesMalus domesticat0
- Treatment
- stored for 12 monthse0
- Outcome
- Klason lignin concentratione0
- Direction
- greatere0
- Comparator
- stored for 0, 4, or 8 monthse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Klason lignin concentration was greater in samples stored for 12 months than in those stored for 0, 4, or 8 months”
t0“Apples”
Claim · model-written summary
Peeling reduced apple fiber concentration about 25%.
- Taxon
- appleMalus domesticae0
- Treatment
- Peelinge0
- Outcome
- fiber concentratione0
- Direction
- reducede0
- Value
- 25%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peeling reduced apple fiber concentration about 25% by decreasing neutral and acidic sugars and Klason lignin in the insoluble fraction”
Claim · model-written summary
Peeling decreased neutral and acidic sugars and Klason lignin in insoluble apple fiber.
- Taxon
- appleMalus domesticae0
- Treatment
- Peelinge0
- Outcome
- neutral and acidic sugars and Klason lignin in the insoluble fractione0
- Direction
- decreasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Peeling reduced apple fiber concentration about 25% by decreasing neutral and acidic sugars and Klason lignin in the insoluble fraction”
Claim · model-written summary
Onion total fiber increased with storage.
- Taxon
- onions
Allium cepae0 - Treatment
- storagee0
- Outcome
- total fiber contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total fiber content of onions increased with storage”
Claim · model-written summary
Storage increased insoluble onion fiber uronic acids.
- Taxon
- onionsAllium cepae0
- Treatment
- storagee0
- Outcome
- insoluble fiber content of uronic acidse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total fiber content of onions increased with storage, primarily by increasing the insoluble fiber content of uronic acids”
The same questions in other papers
storage · quality: grain · Malus domestica (apple)Positive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →storage · quality: grain · Allium cepa (onion)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.