Abstract
Soybean is a rich source of bioactive compounds, such as phenolic acids, flavonoids, isoflavones, carotenoids, and tocopherols. The amount of bioactive compounds in freshly harvested soybeans and their derived products has been determined; however, when they are used in the food industry, soybeans are generally stored prior to being processed. This study aimed to evaluate the effects of soybean moisture content (12%, 15%, and 18%) and storage temperature (11, 18, 25, and 32 °C) on the free phenolic, total flavonoid, vanillic acid, total carotenoid, and δ- and γ-tocopherol content of soybeans stored for 12 mo. Moreover, the ABTS and DPPH radical scavenging activities of phenolic extracts were determined. There was an increase in free phenolics and total flavonoids in the stored grains compared with the grains on the 1st d of storage. Vanillic acid showed a decrease in soybeans stored at 15% and 18% moisture content and 25 or 32 °C, which indicated some degradation into other metabolites. Total carotenoid content decreased as a function of storage temperature and showed some temperature-dependent degradation. The δ- and γ-tocopherol content also tended to decrease in grains stored at 15% or 18% moisture content or 25 or 32 °C, regardless of the moisture content studied.
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Claims 4
Claim · model-written summary
Stored soybean grains had increased free phenolics and total flavonoids relative to day one.
- Treatment
- stored grainse0
- Outcome
- free phenolics and total flavonoidse0
- Direction
- increasee0
- Comparator
- grains on the 1st d of storagee0
Not reportedTaxon
Verbatim
e0“There was an increase in free phenolics and total flavonoids in the stored grains compared with the grains on the 1st d of storage.”
Claim · model-written summary
Vanillic acid decreased in soybeans stored at 15% or 18% moisture and 25 or 32°C.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- 15% and 18% moisture content and 25 or 32 °Ce0
- Outcome
- Vanillic acide0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vanillic acid showed a decrease in soybeans stored at 15% and 18% moisture content and 25 or 32 °C”
Claim · model-written summary
Total carotenoid content decreased as storage temperature increased.
Not reportedTaxon
Verbatim
e0“Total carotenoid content decreased as a function of storage temperature and showed some temperature-dependent degradation.”
Claim · model-written summary
δ- and γ-tocopherol content tended to decrease in grains at 15% or 18% moisture or 25 or 32°C.
- Treatment
- 15% or 18% moisture content or 25 or 32 °Ce0
- Outcome
- δ- and γ-tocopherol contente0
- Direction
- decreasee0
Not reportedTaxonComparator
Verbatim
e0“The δ- and γ-tocopherol content also tended to decrease in grains stored at 15% or 18% moisture content or 25 or 32 °C, regardless of the moisture content studied.”
The same questions in other papers
soil water · molecular: metabolites · Glycine max (soybean)Positive and negative results
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See all 5 papers →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.