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UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

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UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a...
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Two basic types of preparation are used to visualize specimens with a light microscope: wet mounts and fixed specimens.
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Related Experiment Video

Updated: May 4, 2026

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters
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Vincent van Gogh: a pathographic analysis.

R Correa1

  • 1Department of Psychiatry, University of California San Diego (UCSD), USA.

Medical Hypotheses
|December 17, 2013
PubMed
Summary

Vincent van Gogh

Area of Science:

  • Medical Humanities
  • Art History
  • Pathography

Background:

  • Vincent van Gogh's life and art have long intrigued medical professionals.
  • This study presents a systematic pathographic analysis to determine a retrospective diagnosis for the artist.
  • Evidence was classified into five types, including clinical opinions, correspondence, historical accounts, artwork interpretation, and family history.

Discussion:

  • The analysis prioritized evidence from correspondence, historical accounts, and family history.
  • The temporal progression of symptoms was a critical factor in the diagnostic process.
  • A single, most probable diagnostic hypothesis was pursued.

Key Insights:

  • The study systematically evaluates various evidence types to diagnose Vincent van Gogh.

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  • Acute intermittent porphyria (AIP) is proposed as the most likely diagnosis based on the evidence.
  • This research offers a medical perspective on the artist's complex health history.

    • Outlook:

    • Further research could explore the impact of AIP on Van Gogh's artistic output.
    • Comparative pathographic studies of other historical figures could refine diagnostic methodologies.
    • Interdisciplinary collaboration between art historians and medical professionals can yield deeper insights.