Abstract
Summary Changes in the volatile aroma compounds of pineapple ( Ananas comosus ) during freezing and thawing were compared against fresh samples to determine the effect of freezing on pineapple flavour. An HS‐SPME–GC–MS analysis showed that the Smooth Cayenne pineapple variety had nineteen volatile compounds, in four classes of compounds including fourteen esters, two hydrocarbons, two sulphur‐containing compounds and one lactone. The main characteristic volatile compounds of the fresh pineapple were methyl hexanoate, ethyl hexanoate, ethyl 3‐methylthiopropanoate and 1‐(E,Z)‐3,5‐undecatriene. Freeze–thaw cycles were associated with the loss of some volatile aroma compounds, particularly the esters which were found to be the main characteristic of fresh pineapples. The freezing and thawing process was found to cause damage to the pineapple tissues due to ice recrystallisation and dehydration which lead to the reduction of volatile aroma compounds.
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Claims 10
Claim · model-written summary
Smooth Cayenne pineapple contained nineteen volatiles across four chemical classes.
- Taxon
- pineapple
Ananas comosuse0 - Material
- Smooth Cayennee0
- Outcome
- volatile compoundse0
- Value
- nineteen volatile compoundse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Smooth Cayenne pineapple variety had nineteen volatile compounds, in four classes of compounds including fourteen esters, two hydrocarbons, two sulphur‐containing compounds and one lactone”
Claim · model-written summary
Fourteen esters were detected in Smooth Cayenne pineapple.
- Taxon
- pineappleAnanas comosuse0
- Material
- Smooth Cayennee0
- Outcome
- esterse0
- Value
- fourteen esterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Smooth Cayenne pineapple variety had nineteen volatile compounds, in four classes of compounds including fourteen esters, two hydrocarbons, two sulphur‐containing compounds and one lactone”
Claim · model-written summary
Two hydrocarbons were detected in Smooth Cayenne pineapple.
- Taxon
- pineappleAnanas comosuse1
- Material
- Smooth Cayennee1
- Outcome
- hydrocarbonse0
- Value
- two hydrocarbonse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two hydrocarbons, two sulphur‐containing compounds and one lactone”
e1“Smooth Cayenne pineapple variety”
Claim · model-written summary
Two sulphur-containing compounds were detected in Smooth Cayenne pineapple.
- Taxon
- pineappleAnanas comosuse1
- Material
- Smooth Cayennee1
- Outcome
- sulphur‐containing compoundse0
- Value
- two sulphur‐containing compoundse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two sulphur‐containing compounds and one lactone”
e1“Smooth Cayenne pineapple variety”
Claim · model-written summary
One lactone was detected in Smooth Cayenne pineapple.
- Taxon
- pineappleAnanas comosuse1
- Material
- Smooth Cayennee1
- Outcome
- lactonee0
- Value
- one lactonee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one lactone”
e1“Smooth Cayenne pineapple variety”
Claim · model-written summary
Fresh pineapple characteristic volatiles included methyl hexanoate, ethyl hexanoate and ethyl 3-methylthiopropanoate.
- Taxon
- pineappleAnanas comosuse0
- Outcome
- methyl hexanoate, ethyl hexanoate, ethyl 3‐methylthiopropanoatee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main characteristic volatile compounds of the fresh pineapple were methyl hexanoate, ethyl hexanoate, ethyl 3‐methylthiopropanoate and 1‐(E,Z)‐3,5‐undecatriene”
Claim · model-written summary
Fresh pineapple characteristic volatiles also included 1-(E,Z)-3,5-undecatriene.
- Taxon
- pineappleAnanas comosuse0
- Outcome
- 1‐(E,Z)‐3,5‐undecatrienee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fresh pineapple were methyl hexanoate, ethyl hexanoate, ethyl 3‐methylthiopropanoate and 1‐(E,Z)‐3,5‐undecatriene”
Claim · model-written summary
Freeze-thaw cycles were associated with loss of pineapple volatiles, particularly esters.
- Taxon
- pineapplesAnanas comosuse0
- Treatment
- Freeze–thaw cyclese0
- Outcome
- volatile aroma compoundse0
- Direction
- losse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Freeze–thaw cycles were associated with the loss of some volatile aroma compounds, particularly the esters which were found to be the main characteristic of fresh pineapples”
Claim · model-written summary
Freezing and thawing damaged pineapple tissues through ice recrystallisation and dehydration.
- Taxon
- pineappleAnanas comosuse0
- Treatment
- freezing and thawing processe0
- Outcome
- damage to the pineapple tissuese0
- Qualifier
- due to ice recrystallisation and dehydratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The freezing and thawing process was found to cause damage to the pineapple tissues due to ice recrystallisation and dehydration”
Claim · model-written summary
Freezing and thawing reduced pineapple volatile aroma compounds.
- Taxon
- pineappleAnanas comosuse0
- Treatment
- freezing and thawing processe0
- Outcome
- volatile aroma compoundse0
- Direction
- reductione0
- Comparator
- fresh samplese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“freezing and thawing process was found to cause damage to the pineapple tissues due to ice recrystallisation and dehydration which lead to the reduction of volatile aroma compounds”
e1“pineapple ( Ananas comosus ) during freezing and thawing were compared against fresh samples”
The same questions in other papers
cold · quality: phytochemicals · Ananas comosus (pineapple)Positive and negative results
1 in the opposite direction
- positive
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.