caffeine compound

concept · 5 mentions

a chemical compound found in coffee

Other senses of “caffeine”

unspecified alkaloid chemical chemical constituent chemical_compound substance

Connections

The concepts, people, and places this entity is most linked to by claims — node size is mention count, colour is type, dashed nodes are other senses of the same word.

Concept

Defining properties

has physiological action human body
poses dangers
has relationship with metabolism
is broken down by liver extract ⟨from cattle⟩

Perspectives

Claims grouped by the voice that makes them.

HEERLEIN, W.

caffeine has relationship with metabolism 1892
assertsneutralsource: coffee-pg28500
Das Coffein und das Kaffeedestillat in ihrer Beziehung zum Stoffwechsel
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry for HEERLEIN, W. explicitly states the title 'Das Coffein und das Kaffeedestillat in ihrer Beziehung zum Stoffwechsel' (Caffeine and coffee distillate in their relationship to metabolism), published in 1892, which directly establishes the relationship between caffeine and metabolism.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to HEERLEIN, W., the stance appropriately characterizes it as an assertion, the sentiment is neutral, the time is correctly set to 1892 matching the publication year, the context is appropriately empty as the passage provides none, and the quote appears verbatim in the passage title and supports the claim about caffeine's relationship with metabolism (Stoffwechsel).

KOTAKE, Y.

caffeine is broken down by liver extract 1908 ⟨from cattle⟩
assertsneutralsource: coffee-pg28500
Ueber den Abbau des Coffeins durch den Auszug aus der Rinderleber
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly stated in the passage. KOTAKE, Y.'s 1908 publication title 'Ueber den Abbau des Coffeins durch den Auszug aus der Rinderleber' (On the breakdown of caffeine through cattle liver extract) explicitly confirms that caffeine is broken down by liver extract from cattle.
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to KOTAKE, Y. The stance 'asserts' is appropriate as the passage presents this as a factual research finding. The sentiment is neutral, matching the objective scientific tone of the source. The time is correctly set to 1908, matching the publication date. The context 'from cattle' accurately reflects 'Rinderleber' (cattle liver) in the German title. The quote appears verbatim in the passage and directly supports the claim about caffeine being broken down by cattle liver extract.

ROCHE, A.

caffeine has physiological action human body
assertsneutralsource: coffee-pg28500
Du cafe noir et de la cafeine au point de vue de l'action physiologique et des applications a l'hygiene
judge verdicts (4)
- groundedness 0.70 pass — The claim is supported by the passage. The bibliographic entry for ROCHE, A. explicitly mentions 'Du cafe noir et de la cafeine au point de vue de l'action physiologique et des applications a l'hygiene' (Regarding black coffee and caffeine from the point of view of physiological action and hygienic applications), which directly states that caffeine has physiological action and relates to hygienic applications.
- qualifier_fidelity 0.60 fail — QUALIFIER FIDELITY ISSUES: (1) VIEWPOINT - The claim attributes the statement to 'author' but the passage shows this is from ROCHE, A., a named source. The viewpoint should be 'ROCHE' not 'author'. (2) CONTEXT - The claim limits context to 'hygienic applications' but the passage shows ROCHE's work covers 'l'action physiologique et des applications a l'hygiene' (physiological action AND hygienic applications). The context should reflect both aspects or be empty, not restrictively narrow to only hygienic applications. (3) SUBJECT PRECISION - The claim uses 'caffeine' as subject, but the quote fragment 'cafeine au point de vue de l'action physiologique' is from a title about 'cafe noir et de la cafeine' - the broader context concerns coffee, not just isolated caffeine. These qualifiers do not faithfully represent the source attribution and scope in the passage.
- groundedness 1.00 pass — The claim is directly supported by the passage. Roche's work title explicitly states 'Du cafe noir et de la cafeine au point de vue de l'action physiologique' (Concerning black coffee and caffeine from the point of view of physiological action), which directly establishes that Roche discusses caffeine's physiological action.
- qualifier_fidelity 0.90 pass — The claim is largely faithful to the passage. The viewpoint (ROCHE, A.), stance (asserts), and sentiment (neutral) are all appropriate. The quote appears verbatim in the passage and supports the claim about caffeine's physiological action. The time qualifiers are correctly null since the passage provides no temporal information about the claim itself. However, there is a minor issue: the context field is empty, but the passage title indicates the work discusses caffeine "au point de vue de l'action physiologique et des applications a l'hygiene" (from the perspective of physiological action and hygienic applications), which could reasonably be reflected as context. This is a minor qualifier imprecision but does not prevent the claim from passing the fidelity threshold.

Zenetz

caffeine poses dangers 1900
assertsnegativesource: coffee-pg28500
Dangers of caffeine
judge verdicts (2)
- groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry 'ZENETZ. Dangers of caffeine. Pharmaceutical Journal, 1900, 4th ser., X: 333.' explicitly states that Zenetz asserted this position in 1900, matching all key elements of the claim including subject (caffeine), predicate (poses dangers), object (dangers), viewpoint (Zenetz), and time (1900).
- qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to the named source 'Zenetz' rather than using 'author'. The stance 'asserts' is appropriate as the passage presents this as a direct claim without hedging language. The sentiment 'negative' matches the connotation of 'dangers'. The time qualifiers (when: 1900, valid_from: 1900, valid_to: null) correctly reflect the publication date of the Zenetz reference (1900) with no indication of temporal scope restrictions in the passage. The context is appropriately empty as the passage provides no specific context restricting the claim to a particular sense or role. The quote 'Dangers of caffeine' appears verbatim in the passage title and directly supports the claim.

Change over time

1892

has relationship with metabolism

1900

poses dangers

1908

is broken down by liver extract