The discovery of lignin.

definition

Lignin is an organic substance in wood that, with cellulose, forms the principal constituent of wood tissue[1].

DISCOVERY

It was discovered by the Swiss botanist Augustin Pyramus (or Pyrame) de Candolle. In his 1815 publication[2], he described lignin (called as “lignine” by him) in the following manner:

  • A fibrous, tasteless substance which is insoluble in water and alcohol.
  • Soluble in weak alkaline solutions and precipitated by acids.
  • The basis of all woody bodies.

Here is a photograph[3] of pure lignin:

[ux_image_box img=”1004″ image_width=”50″ link=”https://www.biobasedpress.eu/2014/12/bio-aromatics/pure-lignin/” target=”_blank”]

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discoverer

Here is a portrait[4] of A. P. de Candolle:

[ux_image_box img=”1007″ image_width=”50″ link=”https://en.wikipedia.org/wiki/Augustin_Pyramus_de_Candolle” target=”_blank”]

1778-1841

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sources
  1. https://encyclopedia2.thefreedictionary.com/lignin
  2. https://archive.org/details/thorielmenc00cand, page 417.
  3. https://www.biobasedpress.eu/2014/12/bio-aromatics/ pure-lignin/
  4. https://en.wikipedia.org/wiki/Augustin_Pyramus_ de_Candolle

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