Abstract
The effects of topping time on precursor of tobacco-specific nitrosamines in flue-cuted tobacco were studied by pot experiments.The results indicated that earlier of topping the higher contents of nitrate and nitrite.When topping at the right(neither too early not too late) time the contents of nicotine,nornicotine and nitrite decreased.When late topping the contents of totall nicotine,free nicotine in upper leaves obviousty,increased.All in all,when topping at the right time the content of precursor of TSNA is lower than that when topping early and too late.
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Claims 4
Claim · model-written summary
Earlier topping increased nitrate and nitrite contents.
- Taxon
- Tobacco
Nicotiana tabacumt0 - Treatment
- earlier of toppinge0
- Outcome
- contents of nitrate and nitritee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“earlier of topping the higher contents of nitrate and nitrite”
t0“Flue-cured Tobacco”
Claim · model-written summary
Right-time topping reduced nicotine, nornicotine and nitrite contents.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- topping at the right(neither too early not too late) timee0
- Outcome
- contents of nicotine,nornicotine and nitritee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When topping at the right(neither too early not too late) time the contents of nicotine,nornicotine and nitrite decreased”
t0“Flue-cured Tobacco”
Claim · model-written summary
Late topping increased total nicotine and free nicotine in upper leaves.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- late toppinge0
- Outcome
- contents of totall nicotine,free nicotine in upper leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When late topping the contents of totall nicotine,free nicotine in upper leaves obviousty,increased”
t0“Flue-cured Tobacco”
Claim · model-written summary
Right-time topping gave lower TSNA precursor content than early or late topping.
- Taxon
- TobaccoNicotiana tabacumt0
- Treatment
- topping at the right timee0
- Outcome
- content of precursor of TSNAe0
- Direction
- lowere0
- Comparator
- topping early and too latee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when topping at the right time the content of precursor of TSNA is lower than that when topping early and too late”
t0“Flue-cured Tobacco”
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See all 27 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.