Abstract
Wheat bran contains most of the dietary fiber, vitamins, minerals, and antioxidants of the grain. Unfortunately, it readily deteriorates upon storage because it has high lipid contents and lipase activity levels, which can cause rancidity and, hence, when used in food systems, inferior product quality. We here examined the lipid composition and the lipase activities of wheat bran and the impact of pearling prior to milling thereupon. The lipid content of the outer bran layers (2.31% on a dry matter [dm] basis) is lower than that of regular bran (3.81% dm). Nevertheless, these layers have the highest concentration of free fatty acids (FFA, 0.56% dm), which is ascribed to lipid hydrolysis. Indeed, the lipase activity levels in the peripheral layers were three times higher than in the bran itself. Abrading these tissues by pearling prior to milling yielded a bran fraction with about 30% lower FFA content and 30% lower lipase activity level. Pearling offers opportunities to lower the FFA content and lipase activity levels in wheat bran and, hence, to contribute to an improved storage stability of bran.
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Claims 6
Claim · model-written summary
Lipid content of the outer bran layers is lower than that of regular bran.
- Taxon
- Wheat
Triticum aestivumt0 - Organ / stage
- outer bran layerse1
- Outcome
- lipid contente1
- Direction
- lowere1
- Value
- 2.31%e1
- Comparator
- regular brane1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e1“The lipid content of the outer bran layers (2.31% on a dry matter [dm] basis) is lower than that of regular bran (3.81% dm)”
Claim · model-written summary
The outer bran layers have the highest concentration of free fatty acids (0.56% dm).
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- these layerse2
- Outcome
- concentration of free fatty acidse2
- Value
- 0.56% dme2
- Qualifier
- higheste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e2“these layers have the highest concentration of free fatty acids (FFA, 0.56% dm)”
Claim · model-written summary
Lipase activity levels in the peripheral layers are three times higher than in the bran itself.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- peripheral layerse3
- Outcome
- lipase activity levelse3
- Direction
- highere3
- Value
- three timese3
- Comparator
- the bran itselfe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e3“the lipase activity levels in the peripheral layers were three times higher than in the bran itself”
Claim · model-written summary
Pearling before milling lowers the FFA content of the bran fraction by about 30%.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- these tissuese4
- Treatment
- pearling prior to millinge4
- Outcome
- FFA contente4
- Direction
- lowere4
- Value
- 30%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e4“Abrading these tissues by pearling prior to milling yielded a bran fraction with about 30% lower FFA content and 30% lower lipase activity level”
Claim · model-written summary
Pearling before milling lowers the lipase activity level of the bran fraction by 30%.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- these tissuese4
- Treatment
- pearling prior to millinge4
- Outcome
- lipase activity levele4
- Direction
- lowere4
- Value
- 30%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat (Triticum aestivum L.)”
e4“Abrading these tissues by pearling prior to milling yielded a bran fraction with about 30% lower FFA content and 30% lower lipase activity level”
Claim · model-written summary
Pearling offers opportunities to contribute to improved storage stability of wheat bran.
- Taxon
- wheatTriticum aestivume5
- Outcome
- storage stability of brane5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Pearling offers opportunities to lower the FFA content and lipase activity levels in wheat bran and, hence, to contribute to an improved storage stability of bran”
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