Abstract
Abstract Thermal treatment is one of the widely used methods for feedstuff preservation. The aim of this study was to evaluate possible cell wall alterations during the industrial‐scale drying of alfalfa. Alfalfa is mainly dehydrated and pelleted using two drying treatments. First a thermal treatment at 70 °C is applied to the chopped raw material, prior to the main dehydration procedure which involves a temperature of about 600 °C for a restricted time (15 min). The different steps of the dehydration process did not cause significant changes in alfalfa cell wall composition, but the proportion of labile ether‐linked lignin structure (β‐ O ‐4) increased after the thermal shock. Chemical fractionation of cell wall carbohydrates showed that pectins were less accessible to extraction with ammonium oxalate after alfalfa drying. Moreover, xylanase ( endo enzyme) was more effective on cell walls obtained from heated material. These results suggested that heat processing causes some changes in interpolymer bonds (covalent and hydrogen bonds) between pectins and the lignin/hemicellulose matrix, whereby the cell wall network is modified. © 2002 Society of Chemical Industry
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Claims 5
Claim · model-written summary
Drying did not significantly change alfalfa cell wall composition.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- dehydration processe0
- Outcome
- cell wall compositione0
- Direction
- did not cause significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The different steps of the dehydration process did not cause significant changes in alfalfa cell wall composition”
Claim · model-written summary
Thermal shock increased the proportion of labile ether-linked lignin structure.
- Treatment
- thermal shocke0
- Outcome
- proportion of labile ether‐linked lignin structure (β‐ O ‐4)e0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“the proportion of labile ether‐linked lignin structure (β‐ O ‐4) increased after the thermal shock”
Claim · model-written summary
After drying, pectins were less accessible to ammonium oxalate extraction.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- alfalfa dryinge0
- Outcome
- pectins were less accessible to extractione0
- Direction
- less accessiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pectins were less accessible to extraction with ammonium oxalate after alfalfa drying”
Claim · model-written summary
Xylanase was more effective on heated alfalfa cell walls.
- Treatment
- heated materiale0
- Outcome
- xylanase ( endo enzyme) was more effectivee0
- Direction
- more effectivee0
Not reportedTaxonComparator
Verbatim
e0“xylanase ( endo enzyme) was more effective on cell walls obtained from heated material”
Claim · model-written summary
Heat processing was inferred to alter bonds between pectins and lignin/hemicellulose.
- Treatment
- heat processinge0
- Outcome
- changes in interpolymer bondse0
- Qualifier
- between pectins and the lignin/hemicellulose matrixe0
Not reportedTaxon
Verbatim
e0“heat processing causes some changes in interpolymer bonds (covalent and hydrogen bonds) between pectins and the lignin/hemicellulose matrix”
The same questions in other papers
drought · cytology · Medicago sativa (alfalfa)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.