Hendrik Gerard Bungenberg de Jong

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Hendrik Gerard Bungenberg de Jong (born May 27, 1893 in The Hague , † May 7, 1977 in Arnhem ) was a Dutch chemist.

Life

Hendrik Gerard was the son of the doctor Cornelis Marius de Jong (born May 3, 1862 in The Hague; † January 16, 1939 in Lochem) and his wife Neeltje Diederica de Jong (born May 13, 1873 in Gouda; † January 22, 1953 in Lochem). He attended high school and high school in his hometown. In 1913 he began studying biology at the University of Leiden , which he continued in 1914 at the University of Utrecht , where he passed his candidate examination in biology in 1916. He then switched to chemistry, for which he passed the candidate examination in chemistry in 1917 and completed his doctoral examination in 1919. In 1920 he became Hugo Rudolph Kruyt's assistant and worked on a model of directed diffusion through biological membranes. This laid the foundation for an understanding of the role which stress factors and how moisture play in the stability of lyophilic colloids .

In 1922 he changed his surname de Jong, based on the surname of his paternal grandmother, to Bungenberg de Jong. In 1923 he received his doctorate with the treatise Het agarsol. Bijdrage tot de kennis van den emulsoiden toestand (German: Das Agrarsol. Contributions to the knowledge of the state of emulsions ). In 1923 he worked at the natural history laboratory of the Philips company and in 1924 joined the Dutch artificial silk industry in Breda . At the latter company he worked on the viscosity of cellulose. Due to his numerous publications, he was appointed professor of medicinal chemistry at the University of Leiden in 1926, which task he was given on January 26, 1927 with the speech De physico-chemical gesteldheid der kloide eiwitten en hare beteekenis voor het organisme (German: The physical-chemical Condition of colliding proteins and their importance for the organism ).

Bungenberg de Jong continued his work in the field of colloid chemistry, with a greater focus on biological applications. He earned merits in the partial separation of colloid systems, for which he defined the term coacervation with Kruyt. His coacervate investigations became important in the field of biological research, with regard to the effect on biological membranes. For example, with the red blood cells, the biological permeability was examined and the antagonism of the ions recognized. His student Klaas Christiaan Winkler (born May 22, 1908 in Amsterdam, † December 6, 1994 in Utrecht) developed this work further. His research into colloidal embedded systems inspired the Russian researcher Alexander Ivanovich Oparin to suggest that coacervates play a role in the origin of life.

His technical applications of microencapsulation also found their way into everyday life today. The well-known carbon-free copier paper, which is used today in laser or inkjet printers, can be traced back to his research work. In 1942, Bungenberg de Jong became a member of the Royal Dutch Academy of Sciences . He wrote about 250 individual papers in the Dutch specialist journals and journals of his time. His work received little international attention. In 1961 he retired from his professorship and Bungnberg de Jong withdrew from his academic work. He moved to Oosterbeck , where he devoted himself to his old love of botany.

Bungenberg de Jong married on November 17, 1921 in Utrecht with Martina Antonetta van der Linden (born September 3, 1895 in Rotterdam), the daughter of Reiner Adriaan van der Linden (born May 4, 1868 in Zierikzee; † February 18, 1934 in The Hague) and his wife Johanna Maria van der Veen, who married on August 15, 1894 in Zwijndrecht (born November 28, 1866 in Zwijndrecht; † September 9, 1950 in Leiden). The marriage has two daughters and a son.

Works (selection)

  • Het agarsol. Bijdrage tot de kennis van den emulsoiden toestand. Hajer, Utrecht, 1921 ( online )
  • De physico-chemical gesteldheid of the colloid eggwitten en hare beteekenis voor het organisme. Naeff, The Hague, 1927
  • La coacervation et son importance in biology. Hermann, Paris, 1936, (2nd vol.)
  • Biocolloids and their interactions. Springer Verlag, Vienna, 1956

literature

  • H. Beukers: Jong, Hendrik Gerard de (1893-1977). In: Biographical Woordenboek van Nederland. The Hague, 1989, Vol. 3, ( Online )
  • Jan Theodoor Gerard Overbeek : Levens report HG Bungenberg de Jong. In: Jaarboek Koninklijke Nederlandse Akademie van Wetenschappen, 1977. Amsterdam, 1977, pp. 158–163 ( Online PDF )

Web links

personal data
SURNAME Bungenberg de Jong, Hendrik Gerard
ALTERNATIVE NAMES Hendrik Gerard de Jong
BRIEF DESCRIPTION Dutch chemist
DATE OF BIRTH May 27, 1893
PLACE OF BIRTH The hague
DATE OF DEATH May 7, 1977
Place of death Arnhem