Abstract
ABSTRACT Fried potato products may accumulate substantial amounts of acrylamide due to high precursor contents, namely reducing sugars and asparagine. In a two-factorial experiment increasing N supply, increased the contents of reducing sugars in most cases, and resulted in higher contents of free amino acids. α -amino-N, which was tightly correlated with the contents of free amino acids, can be regarded a suitable rapid test for free asparagine for a given variety. Increasing K addition always raised the citrate contents, but lessened the contents of reducing sugars. Selected treatments were processed into French fries. Highest acrylamide contents were observed in tubers grown with high N and inadequate K supply, which also contained the highest contents of precursors. The experiment clearly demonstrates that nutrient supply has significant impact on the contents of acrylamide precursors and thus for the acrylamide formation during frying. Keywords: acrylamideamino acidsnitrogenpotassiumpotatoreducing sugars Solanum tuberosum ssp. tuberosum L. ACKNOWLEDGEMENTS Dedicated to Prof. Dr. Burkhard Sattelmacher, who passed away on November 21, 2005. The authors are grateful to Dr. Reiner Krähmer for his advice and to Stephanie thor Straten, Regine Epbinder and Bijan Kawiani for help and assistance during the course of the experiments and the analysis.
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Claims 8
Claim · model-written summary
Increasing N supply increased reducing sugar contents in most cases.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- increasing N supplye1
- Outcome
- contents of reducing sugarse1
- Direction
- increasede1
- Qualifier
- in most casese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e1“increasing N supply, increased the contents of reducing sugars in most cases”
Claim · model-written summary
Increasing N supply resulted in higher free amino acid contents.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- increasing N supplye1
- Outcome
- contents of free amino acidse2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e1“increasing N supply, increased the contents of reducing sugars in most cases”
e2“resulted in higher contents of free amino acids”
Claim · model-written summary
alpha-amino-N is tightly correlated with free amino acid contents and can serve as a rapid test for free asparagine in a given variety.
- Taxon
- potatoSolanum tuberosumt0
- Material
- a given varietye3
- Compound
- α -amino-Ne3
- Outcome
- contents of free amino acidse3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e3“α -amino-N, which was tightly correlated with the contents of free amino acids, can be regarded a suitable rapid test for free asparagine for a given variety”
Claim · model-written summary
Increasing K addition raised citrate contents.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Increasing K additione4
- Outcome
- citrate contentse4
- Direction
- raisede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e4“Increasing K addition always raised the citrate contents, but lessened the contents of reducing sugars”
Claim · model-written summary
Increasing K addition lessened reducing sugar contents.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Increasing K additione4
- Outcome
- contents of reducing sugarse4
- Direction
- lessenede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e4“Increasing K addition always raised the citrate contents, but lessened the contents of reducing sugars”
Claim · model-written summary
Highest acrylamide contents occurred in tubers grown with high N and inadequate K supply.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- tuberse5
- Treatment
- high N and inadequate K supplye5
- Outcome
- acrylamide contentse5
- Direction
- Higheste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e5“Highest acrylamide contents were observed in tubers grown with high N and inadequate K supply, which also contained the highest contents of precursors”
Claim · model-written summary
Tubers grown with high N and inadequate K supply had the highest contents of acrylamide precursors.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- high N and inadequate K supplye5
- Outcome
- contents of precursorse5
- Direction
- higheste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e5“Highest acrylamide contents were observed in tubers grown with high N and inadequate K supply, which also contained the highest contents of precursors”
Claim · model-written summary
Nutrient supply significantly affected the contents of acrylamide precursors and thus acrylamide formation during frying.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- nutrient supplye6
- Outcome
- contents of acrylamide precursorse6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Potato Tubers”
e6“The experiment clearly demonstrates that nutrient supply has significant impact on the contents of acrylamide precursors and thus for the acrylamide formation during frying”
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