Abstract
Abstract Heating of intact cassava leaves causes liberation of hydrogen cyanide. This phenomenon appears to be caused by β‐glucosidase‐catalysed decomposition of the cyanogenic glycosides linamarin and lotaustralin. Because of these losses, many previously determined values for total nitrogen in cassava (and other cyanogenic plants) are probably in error as plant materials used for Kjeldahl determinations are often dried at 70–90°C. Liberation of cyanide from intact cassava leaves by heating at 80°C is more complete than liberation by the homogenisation methods commonly used. Homogenisation of cassava leaf tissues with liquid nitrogen or dry ice gives somewhat lower values, and these materials are often not readily available in areas where cassava is studied. The basis of a relatively simple procedure for the isolation of hydrogen cyanide from cassava leaves is suggested.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Heating intact cassava leaves liberates hydrogen cyanide.
- Taxon
- cassava
Manihot esculentae0 - Organ / stage
- leavese0
- Treatment
- Heatinge0
- Outcome
- liberation of hydrogen cyanidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heating of intact cassava leaves causes liberation of hydrogen cyanide.”
Claim · model-written summary
The authors attribute cyanide liberation to glycoside decomposition catalysed by β-glucosidase.
- Taxon
- cassavaManihot esculentat0
- Gene
- β‐glucosidasee0
- Compound
- linamarin and lotaustraline0
- Outcome
- decomposition of the cyanogenic glycosides linamarin and lotaustraline0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This phenomenon appears to be caused by β‐glucosidase‐catalysed decomposition of the cyanogenic glycosides linamarin and lotaustralin.”
t0“cassava”
Claim · model-written summary
Previously measured total nitrogen values in cassava are probably erroneous because drying can lose cyanide nitrogen.
- Taxon
- cassavaManihot esculentae0
- Treatment
- dried at 70–90°Ce0
- Outcome
- values for total nitrogene0
- Qualifier
- probably in errore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Because of these losses, many previously determined values for total nitrogen in cassava (and other cyanogenic plants) are probably in error as plant materials used for Kjeldahl determinations are often dried at 70–90°C.”
Claim · model-written summary
Heating intact cassava leaves at 80°C releases cyanide more completely than common homogenisation methods.
- Taxon
- cassavaManihot esculentae0
- Treatment
- heating at 80°Ce0
- Outcome
- Liberation of cyanidee0
- Direction
- more completee0
- Comparator
- homogenisation methods commonly usede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Liberation of cyanide from intact cassava leaves by heating at 80°C is more complete than liberation by the homogenisation methods commonly used.”
Claim · model-written summary
Homogenisation with liquid nitrogen yields somewhat lower values.
- Taxon
- cassavaManihot esculentae0
- Treatment
- liquid nitrogene0
- Outcome
- valuese0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Homogenisation of cassava leaf tissues with liquid nitrogen or dry ice gives somewhat lower values”
Claim · model-written summary
Homogenisation with dry ice yields somewhat lower values.
- Taxon
- cassavaManihot esculentae0
- Treatment
- dry icee0
- Outcome
- valuese0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Homogenisation of cassava leaf tissues with liquid nitrogen or dry ice gives somewhat lower values”
Claim · model-written summary
The authors suggest a relatively simple procedure for isolating hydrogen cyanide from cassava leaves.
- Taxon
- cassavaManihot esculentae0
- Outcome
- procedure for the isolation of hydrogen cyanidee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The basis of a relatively simple procedure for the isolation of hydrogen cyanide from cassava leaves is suggested.”
The same questions in other papers
heat · molecular: metabolites · Manihot esculenta (cassava)Results agree
1 paper in the same direction as this paper
- 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.