Paper · 2011 · Science and Technology of Food Industry

Characteristics of polyphenol oxidase in apple and non-sulfur prevention of discoloration in dried apple slice processing

Leyong Wang

4
claims
8
verbatim quotes
0
citations
3
research areas
—
Not open access

Abstract

Browning occured very easily during the procession of dried apple slice.In this study,the characteristics of polyphenol oxidase in apple were investigated.By an orthogonal experiment of L9( 34) ,a kind of mixed soaking solution which was safe and effective for color protection was obtained.The results showed that polyphenol oxidase in apple was actively at pH6.0 and 36℃,and the activity was almost lost in condition of 100℃,60s.After the apple were soaked in the mixed solution which consisted of 0.6% citric acid,0.06% L-cys and 1.5% NaCl,and dried at 50℃,0.09MPa,the color of the dried apple slice was good.

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Claims 4

Observationobservedoriginal resultmeasured

Claim · model-written summary

Polyphenol oxidase in apple was active at pH 6.0 and 36 degrees C.

Gene
polyphenol oxidasee0
Outcome
polyphenol oxidasee0
Qualifier
actively at pH6.0 and 36℃e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“polyphenol oxidase in apple was actively at pH6.0 and 36℃”

✓ located verbatim in the source · abstract, characters 315–372 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Polyphenol oxidase activity in apple was almost lost after heating at 100 ℃ for 60 s.

Treatment
condition of 100℃,60se1
Gene
polyphenol oxidasee0
Outcome
the activitye1
Direction
almost loste1

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“polyphenol oxidase in apple was actively at pH6.0 and 36℃”

✓ located verbatim in the source · abstract, characters 315–372 · show in text ↑
e1

“the activity was almost lost in condition of 100℃,60s”

✓ located verbatim in the source · abstract, characters 377–430 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

A mixed soaking solution was effective for color protection of apple slices.

Treatment
mixed soaking solutione2
Outcome
color protectione2
Direction
effectivee2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“polyphenol oxidase in apple was actively at pH6.0 and 36℃”

✓ located verbatim in the source · abstract, characters 315–372 · show in text ↑
e2

“a kind of mixed soaking solution which was safe and effective for color protection was obtained”

✓ located verbatim in the source · abstract, characters 195–290 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Soaking apple slices in 0.6% citric acid, 0.06% L-cys and 1.5% NaCl before drying at 50 ℃ gave dried apple slices with good color.

Treatment
0.6% citric acid,0.06% L-cys and 1.5% NaCle4
Outcome
color of the dried apple slicee3
Direction
goode3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Malus domestica
Malus domestica · TaxonW.carter · CC0 · Wikimedia Commons ↗

Verbatim

e0

“polyphenol oxidase in apple was actively at pH6.0 and 36℃”

✓ located verbatim in the source · abstract, characters 315–372 · show in text ↑
e3

“the color of the dried apple slice was good”

✓ located verbatim in the source · abstract, characters 568–611 · show in text ↑
e4

“consisted of 0.6% citric acid,0.06% L-cys and 1.5% NaCl”

✓ located verbatim in the source · abstract, characters 487–542 · show in text ↑

citric acid · quality: postharvest · Malus domestica (apple)Positive and negative results

7 papers: 6 positive, 1 negative or no effect

5 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

3 papers more in this group

See all 7 papers →

application · control · Malus domestica (apple)Positive and negative results

29 papers: 25 positive, 4 negative or no effect

24 papers in the same direction as this paper · 2 in the opposite direction · 2 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. no effect

25 papers more in this group

See all 29 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.