idchkg
An Unflattened Identity and Change Knowledge Graph

caffeine unspecified sense

concept · 14 mentions

alkaloid compound extracted from coffee

Other senses of “caffeine”

alkaloid chemical chemical constituent chemical_compound 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.

caffeinecaffeine (alkaloid)caffeine (chemical)caffeine (chemical constituent)caffeine (chemical_compound)caffeine (compound)caffeine (substance)insomnia — 1 shared claimroasting — 1 shared claimmedicine — 1 shared claimanimal body — 1 shared claimfatigue — 1 shared claimheart tonic and diuretic — 1 shared claimmammalian heart — 1 shared claimbeneficial effects in heart paralysis — 1 shared claimexcitability of cardiac vagus nerve — 1 shared claimgastro-intestinal tract — 1 shared claimVagus center — 1 shared claimcoffee-berry — 1 shared claiminsomniaroastingmedicineanimal bodyfatigueheart tonic and diu…mammalian heartbeneficial effects …excitability of car…gastro-intestinal t…Vagus centercoffee-berry
Concept

Defining properties

Perspectives

Claims grouped by the voice that makes them.

Dawson and Wetherill

  • caffeine is not altered in roasting
    assertsneutralsource: coffee-pg28500
    caffeine, which is about one percent and is not altered in roasting
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly stated in the passage. The quoted text explicitly appears in the passage where it discusses caffeine being 'about one percent and is not altered in roasting,' attributed to Dawson and Wetherill's analysis.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the statement to Dawson and Wetherill as named sources. The stance appropriately uses 'asserts' since the passage presents this as a factual claim in their scientific inquiry. The sentiment is neutral, matching the objective tone of the scientific statement. The time qualifiers are appropriately null since the passage provides no temporal scope beyond the 1855 publication date. The context is empty, which is appropriate as the passage does not restrict this claim to a particular sense or role. The quote appears verbatim in the passage and accurately supports the claim.
  • coffee berry contains caffeine
    assertsneutralsource: coffee-pg28500
    the coffee berry contains two substances, one the nitrogenized quality, caffeine, which is about one percent
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly stated in the passage. The quote provided is taken verbatim from the text where Dawson and Wetherill explicitly state that the coffee berry contains caffeine as one of two substances, described as 'the nitrogenized quality' at about one percent concentration.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to Dawson and Wetherill (they are the authors of the scientific inquiry being discussed). The stance 'asserts' is appropriate as the passage presents this as a factual statement rather than a dispute or question. The sentiment is neutral, matching the scientific tone of the passage. The time qualifiers are appropriately null since the passage provides no temporal scope beyond the 1855 publication date. The context is empty, which is appropriate as the passage does not restrict this claim to a particular sense or role. The quote is verbatim from the passage and directly supports the claim about the coffee berry containing caffeine.

Becher

  • caffeine functions as heart tonic and diuretic 1884
    assertspositivesource: coffee-pg28500
    Coffein als Herztonicum und Diureticum
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly supported by the passage. Becher's 1884 publication is cited with the exact title 'Coffein als Herztonicum und Diureticum' (Caffeine as Heart Tonic and Diuretic), which directly matches the subject-predicate-object relationship stated in the claim.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly names Becher as the source. The stance 'asserts' is appropriate for the passage's straightforward attribution. The sentiment is positive, reflecting the paper's title framing caffeine as a heart tonic and diuretic. The time is correctly set to 1884, matching the publication date. The context is appropriately empty as the passage provides no specific contextual restriction. The quote 'Coffein als Herztonicum und Diureticum' appears verbatim in Becher's 1884 publication title and directly supports the claim that caffeine functions as a heart tonic and diuretic.

Bondzynski, ST. and Gottlieb, R.

  • methylxanthin is metabolic product of caffeine 1895
    assertsneutralsource: coffee-pg28500
    Methylxanthin, ein Stoffwechselprodukt des Theobromin und Coffein
    judge verdicts (4)
    • groundedness 1.00 pass — The claim is directly stated in the passage. The Bondzynski and Gottlieb citation explicitly describes methylxanthin as 'ein Stoffwechselprodukt des Theobromin und Coffein' (a metabolic product of theobromin and caffeine), and Albanese's 1899 article also mentions the formation of 3-Methyl-xanthin from caffeine in the animal organism.
    • qualifier_fidelity 0.60 fail — The viewpoint qualifier is incorrect. The passage attributes this claim to named sources (BONDZYNSKI, ST. and GOTTLIEB, R.), not to an anonymous 'author'. The claim should specify these researchers as the viewpoint, not 'author'. Additionally, the time qualifiers are problematic: valid_from and valid_to should be null since the passage provides only publication dates (1895), not a temporal scope of validity for the claim itself. The quote is accurate and the stance/sentiment are faithful.
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry for Bondzynski and Gottlieb's 1895 work explicitly states 'Ueber Methylxanthin, ein Stoffwechselprodukt des Theobromin und Coffein' (On Methylxanthin, a metabolic product of Theobromin and Caffeine), confirming that methylxanthin is presented as a metabolic product of caffeine according to these authors.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly names Bondzynski and Gottlieb as the source authors. The stance 'asserts' is appropriate as the passage presents their work as a factual claim. The sentiment is neutral, matching the scientific nature of the statement. The time is correctly set to 1895, matching the publication date shown in the passage. The context is appropriately empty as the passage provides no specific restriction of sense or role. The quote is verbatim from the passage title (adjusting for original German: 'Methylxanthin, ein Stoffwechselprodukt des Theobromin und Coffein') and directly supports the claim about methylxanthin being a metabolic product of caffeine.

Cushny and van Naten

  • caffeine affects mammalian heart 1901
    assertsneutralsource: coffee-pg28500
    On the action of caffeine on the mammalian heart
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly stated in the passage. The bibliographic entry for Cushny and van Naten explicitly shows their 1901 publication titled 'On the action of caffeine on the mammalian heart,' which directly supports the subject-predicate-object relationship and all temporal and attribution details provided in the claim.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly names Cushny and van Naten as the source (matching the passage attribution). The stance 'asserts' is appropriate for a neutral scientific study. The sentiment is neutral, matching the descriptive nature of the work. The time qualifier correctly reflects the 1901 publication date. The context is appropriately empty as the passage provides no restrictive context for the claim. The quote appears verbatim in the passage as the title of their work and directly supports the claim about caffeine's effects on the mammalian heart.

Dorvault

  • caffeine has pharmacological properties medicine 1850
    assertsneutralsource: coffee-pg28500
    Note pharmacologique sur le cafe et la cafeine
    judge verdicts (2)
    • groundedness 0.70 pass — The claim is supported by the passage. Dorvault's 1850 publication titled 'Note pharmacologique sur le cafe et la cafeine' (Pharmacological note on coffee and caffeine) directly indicates that caffeine has pharmacological properties worthy of medical/scientific examination, though the passage only provides the title rather than detailed content of the assertion.
    • qualifier_fidelity 0.90 pass — Context qualifier is unfaithful: the passage indicates Dorvault's note concerns 'le cafe et la cafeine' (coffee and caffeine), so the context should reflect 'pharmacological properties of coffee and caffeine' rather than being empty. The claim's subject-predicate-object structure focuses only on caffeine's pharmacological properties in medicine, but the quote and source address both coffee and caffeine together. This is a minor contextual misalignment, but all other qualifiers (viewpoint: Dorvault, stance: asserts, sentiment: neutral, time: 1850) are faithful to the passage.

Dumas

  • caffeine has beneficial effects in heart paralysis 1886
    assertspositivesource: coffee-pg28500
    Bons effets de la cafeine dans un cas de paralysie du coeur
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry by Dumas, Adolphe from 1886 has the title 'Bons effets de la cafeine dans un cas de paralysie du coeur' (Good effects of caffeine in a case of heart paralysis), which directly states the claim that caffeine has beneficial effects in heart paralysis according to Dumas's work.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly identifies Dumas as the source (not 'author'). The stance 'asserts' appropriately reflects how the passage presents this claim. The sentiment 'positive' matches the positive connotation of 'Bons effets' (good/beneficial effects). The time qualifiers (when, valid_from, valid_to all set to 1886) correctly match the publication date in the passage. The quote appears verbatim from the DUMAS entry and accurately supports the claim. Context is appropriately empty as the passage provides no specific contextual restrictions.

Fredericq

  • caffeine modifies excitability of cardiac vagus nerve 1913
    assertsneutralsource: coffee-pg28500
    L'excitabilite du vague cardiaque et ses modifications sous l'influence de la cafeine
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly supported by the passage. The title of Fredericq's 1913 publication explicitly states 'L'excitabilite du vague cardiaque et ses modifications sous l'influence de la cafeine' (The excitability of the cardiac vagus and its modifications under the influence of caffeine), which directly confirms that caffeine modifies the excitability of the cardiac vagus nerve.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly names 'Fredericq' (Henri Fredericq) as the source, not the author. The stance 'asserts' is appropriate as the passage presents this as Fredericq's research finding without disputation. The sentiment 'neutral' matches the objective scientific framing. The time qualifiers (when: 1913, valid_from: 1913, valid_to: 1913) correctly reflect the publication year. The context is appropriately empty as the passage provides no restricting context. The quote is verbatim from the passage title and directly supports the claim about caffeine's modification of cardiac vagus nerve excitability.

Gourewitsch

  • caffeine behaves in animal body with habituation effect animal body 1907
    assertsneutralsource: coffee-pg28500
    Ueber des Verhalten des Coffein im Tierkoerper mit Ruecksicht auf die Angewoehnung
    judge verdicts (2)
    • groundedness 0.90 pass — The claim is directly supported by the passage. The bibliographic entry for GOUREWITSCH, D. (1907) explicitly states the title 'Ueber des Verhalten des Coffein im Tierkoerper mit Ruecksicht auf die Angewoehnung' which translates to 'On the behavior of caffeine in the animal body with regard to habituation,' matching the claim's subject, predicate, and object with only minor rewording from German to English.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. Viewpoint correctly identifies Gourewitsch as the source. Stance 'asserts' is appropriate for a straightforward research article title. Sentiment 'neutral' matches the objective scientific tone. Time 1907 matches the publication year exactly. Context is appropriately empty as the passage provides no restrictive context beyond the scientific subject matter. Quote appears verbatim in the passage and accurately supports the claim about caffeine's behavior in animal bodies with regard to habituation.

Lendrich, K. and Nottbohm, E.

  • caffeine is lost during roasting caffeine 1909
    assertsneutralsource: coffee-pg28500
    den Coffeinverlust beim Roesten des Kaffees
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly supported by the passage. The title of Lendrich and Nottbohm's 1909 publication explicitly states 'Ueber den Coffeingehalt des Kaffees und den Coffeinverlust beim Roesten des Kaffees' (concerning the caffeine content of coffee and the caffeine loss during roasting of coffee), which directly confirms that caffeine is lost during roasting.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to Lendrich, K. and Nottbohm, E., whose 1909 publication title 'Ueber den Coffeingehalt des Kaffees und den Coffeinverlust beim Roesten des Kaffees' (About the caffeine content of coffee and caffeine loss during roasting of coffee) directly supports the claim. The stance 'asserts' is appropriate as the passage presents this as a research finding. The sentiment is neutral, matching the objective scientific tone. The time qualifiers (1909) match the publication date. The quote 'den Coffeinverlust beim Roesten des Kaffees' appears verbatim in the title and supports the predicate. The empty context is appropriate as the passage does not restrict the claim to a specific sense or role.

M.V. Tyrode

  • caffeine affects gastro-intestinal tract 1911
    assertsneutralsource: coffee-pg28500
    Caffeine on the gastro-intestinal tract
    judge verdicts (4)
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliography entry for TYRODE, M.V. explicitly states the title 'Caffeine on the gastro-intestinal tract' published in 1911, which directly confirms the subject (caffeine), predicate (affects/acts on), and object (gastro-intestinal tract) of the claim.
    • qualifier_fidelity 0.60 fail — The quote is not verbatim from the passage. The passage shows the full title as 'Caffeine on the gastro-intestinal tract' which is attributed to M.V. Tyrode in the Boston Medical and Surgical Journal, 1911. However, the quote provided does not appear verbatim in the passage - the actual passage entry reads 'TYRODE, M.V. Caffeine on the gastro-intestinal tract. Boston Medical and Surgical Journal, 1911, CLXIV: 686.' The quote qualifier fails because it must appear verbatim in the passage and support the claim. The quote should be the exact title as it appears in the bibliographic reference.
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry for TYRODE, M.V. explicitly states the title 'Caffeine on the gastro-intestinal tract' published in 1911, which directly confirms that Tyrode asserts caffeine affects the gastro-intestinal tract.
    • qualifier_fidelity 0.85 pass — The claim is largely faithful to the passage. The viewpoint (M.V. Tyrode), stance (asserts), sentiment (neutral), and time qualifiers (1911) are all correctly extracted from the bibliography entry. The quote 'Caffeine on the gastro-intestinal tract' appears verbatim in the passage as the title of Tyrode's work. However, there is a minor issue: the context is given as an empty string, but the passage provides a publication source context (Boston Medical and Surgical Journal, 1911, CLXIV: 686). While context restrictions typically apply to semantic senses rather than bibliographic metadata, leaving context entirely empty when the passage specifies a journal publication could be considered incomplete qualifier specification. Nevertheless, this is not a material distortion of the claim's fidelity.

Swirski, G.

  • caffeine influences Vagus center 1904
    assertsneutralsource: coffee-pg28500
    Beeinfluessung des Vaguscentrums durch das Coffein
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly stated in the passage. The bibliographic entry for SWIRSKI, G. explicitly mentions 'Ueber dieBeeinfluessung des Vaguscentrums durch das Coffein' (On the influence of the Vagus center by caffeine), published in 1904, which directly supports the subject-predicate-object relationship and attribution.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint correctly attributes the claim to Swirski, G. The stance 'asserts' appropriately reflects the neutral scientific presentation in the title. The time qualifier correctly matches the 1904 publication date. The quote 'Beeinfluessung des Vaguscentrums durch das Coffein' appears verbatim in the passage title and supports the claim about caffeine's influence on the Vagus center. The sentiment is appropriately neutral for a scientific paper. The context is appropriately empty as the passage does not restrict this to a particular sense or role.

W.H.R. Rivers

  • caffeine influences fatigue 1908
    assertsneutralsource: coffee-pg28500
    The influence of alcohol and other drugs on fatigue. II. Caffeine
    judge verdicts (4)
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry for RIVERS, W.H.R. explicitly states the title 'The influence of alcohol and other drugs on fatigue. II. Caffeine' from 1908, which directly asserts that caffeine influences fatigue.
    • qualifier_fidelity 0.60 fail — VIEWPOINT is unfaithful: the claim uses 'author' but should specify 'W.H.R. Rivers' as the named source in the passage. The passage explicitly attributes this work to Rivers as the author of the titled work, not an anonymous 'author'. This is a clear case where a named source must be used rather than the generic 'author' qualifier.
    • groundedness 1.00 pass — The claim is directly supported by the passage. The bibliographic entry for RIVERS, W.H.R. explicitly states the work title 'The influence of alcohol and other drugs on fatigue. II. Caffeine' published in London in 1908, which directly confirms that caffeine influences fatigue according to Rivers' work.
    • qualifier_fidelity 0.90 pass — The claim's qualifiers are largely faithful to the passage. The viewpoint correctly attributes the work to W.H.R. Rivers; the stance 'asserts' is appropriate as this is a scholarly work making claims; the sentiment 'neutral' matches the academic tone; the time '1908' aligns with the publication date in the passage; the quote appears verbatim in the passage title. The only minor issue is that 'context' is empty when it could more precisely specify this relates to Rivers' work on 'the influence of alcohol and other drugs on fatigue,' but this is not a substantial fidelity problem as the subject-predicate-object structure adequately captures the work's focus.

Wiley

  • caffeine makes a direct attack on the nerves and causes insomnia
    assertsnegativesource: coffee-pg28500
    the caffein (in coffee) makes a direct attack on the nerves and causes insomnia
    judge verdicts (2)
    • groundedness 1.00 pass — The claim is directly stated in the passage as a quote from Wiley: 'We know beyond doubt that the caffein (in coffee) makes a direct attack on the nerves and causes insomnia.' The passage explicitly attributes this assertion to Wiley, making it fully grounded in the text.
    • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage. The viewpoint is correctly attributed to Wiley (not author), the stance 'asserts' accurately reflects how the passage presents Wiley's claim without hedging, the sentiment is appropriately negative given the critical framing of the attack on nerves and causation of insomnia, time qualifiers are correctly null as the passage provides no temporal information, context is appropriately empty as no specific sense restriction applies, and the quote appears verbatim in the passage supporting the claim.

Change over time

1850
  • has pharmacological properties medicine
1884
  • functions as heart tonic and diuretic
1886
  • has beneficial effects in heart paralysis
1901
  • affects mammalian heart
1904
  • influences Vagus center
1907
  • behaves in animal body with habituation effect animal body
1908
  • influences fatigue
1909
  • is lost during roasting caffeine
1911
  • affects gastro-intestinal tract
1913
  • modifies excitability of cardiac vagus nerve
1895
  • is metabolic product of methylxanthin

Disagreements

influences …
affects …