Abstract
A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays. This phenomenon was accompanied by the marked increase in polyphenol content and peroxidase activity, and the transient increase in o-diphenol oxidase activity. Total reducing compounds in the tissue were also increased by gamma irradiation. The browning phenomenon depended on the storage period from the harvest to gamma irradiation treatment. The browning and the transient increase in o-diphenol oxidase activity were completely suppressed in the case of tubers irradiated 3 months after harvest. There was no significant change in α-amylase activity in all tubers tested.
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Claims 7
Claim · model-written summary
Gamma irradiation of potato tubers caused considerable browning in cortex and along xylem.
- Taxon
- potato tuberse0
- Treatment
- irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rayse0
- Outcome
- browninge0
- Setting
- Sakai in Osaka Prefecturee0
Not reportedComparatorDirection
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
Claim · model-written summary
Gamma irradiation markedly increased polyphenol content and peroxidase activity in potato tubers.
- Taxon
- potato tuberse0
- Treatment
- cobalt-60 gamma rayse0
- Outcome
- polyphenol content and peroxidase activitye1
- Direction
- marked increasee1
Not reportedComparator
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e1“This phenomenon was accompanied by the marked increase in polyphenol content and peroxidase activity, and the transient increase in o-diphenol oxidase activity”
Claim · model-written summary
Gamma irradiation caused a transient increase in o-diphenol oxidase activity in potato tubers.
- Taxon
- potato tuberse0
- Treatment
- cobalt-60 gamma rayse0
- Outcome
- o-diphenol oxidase activitye1
- Direction
- transient increasee1
Not reportedComparator
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e1“This phenomenon was accompanied by the marked increase in polyphenol content and peroxidase activity, and the transient increase in o-diphenol oxidase activity”
Claim · model-written summary
Gamma irradiation increased total reducing compounds in potato tubers.
- Taxon
- potato tuberse0
- Treatment
- gamma irradiatione2
- Outcome
- Total reducing compoundse2
- Direction
- increasede2
Not reportedComparator
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e2“Total reducing compounds in the tissue were also increased by gamma irradiation”
Claim · model-written summary
Browning in potato tubers depended on the storage period between harvest and gamma irradiation.
- Taxon
- potato tuberse0
- Treatment
- storage period from the harvest to gamma irradiation treatmente3
- Outcome
- browning phenomenone3
Not reportedDirection
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e3“The browning phenomenon depended on the storage period from the harvest to gamma irradiation treatment”
Claim · model-written summary
Irradiating potato tubers 3 months after harvest completely suppressed browning and the transient increase in o-diphenol oxidase activity.
- Taxon
- potato tuberse0
- Treatment
- tubers irradiated 3 months after harveste4
- Outcome
- browning and the transient increase in o-diphenol oxidase activitye4
- Direction
- completely suppressede4
Not reportedComparator
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e4“The browning and the transient increase in o-diphenol oxidase activity were completely suppressed in the case of tubers irradiated 3 months after harvest”
Claim · model-written summary
Gamma irradiation did not significantly change alpha-amylase activity in potato tubers.
- Taxon
- potato tuberse0
- Treatment
- cobalt-60 gamma rayse0
- Outcome
- α-amylase activitye5
- Direction
- no significant changee5
Not reportedComparator
Verbatim
e0“A considerable browning was observed especially in cortex tissue and along xylem of potato tubers harvested at Sakai in Osaka Prefecture, after irradiation with 10, 20 and 50 krad doses of cobalt-60 gamma rays”
e5“There was no significant change in α-amylase activity in all tubers tested”
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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.