Leopold Just

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Johann Leopold Just (born May 27, 1841 in Filehne , Province of Posen , † August 30, 1891 in Baden-Baden ) was a Prussian, German botanist and university professor . Its official botanical author abbreviation is " Just ".

Life

Leopold Just was the son of the pharmacist in Filehne Johann Just and his wife Emilie Paulcke. After attending high school in Torun , he worked for two years in various mines and cabins Upper Silesia before the 1862 University of Breslau was referring to there medicine to study. Under the influence of Heinrich Göppert and Ferdinand Julius Cohn , however, he changed his field of study to the natural sciences with the specialist study of botany and also attended lectures in zoology with Adolf Eduard Grube and in mineralogy with Ferdinand von Roemer . At Easter 1865 he moved to the University of Zurich for three semesters , where he acquired chemical knowledge in Georg Städeler's laboratory and continued his botanical training with Oswald Heer and Carl Eduard Cramer . After he returned to Breslau in the fall of 1866, he became one of two assistants at the newly founded Institute of Plant Physiology under Cohn. On February 12, 1870, he received his doctorate from the Philosophical Faculty of the University of Breslau. His dissertation deals with the anatomical and chemical changes in rye seedlings that were grown in the light or in the dark.

After a short stay with Alexander Braun and Leopold Kny in Berlin, Just in 1870 accepted the position as an assistant at the agricultural and forestry laboratory at the Polytechnic University of Karlsruhe , which Grand Duke Friedrich I promoted to a technical university in 1865 and was not renamed until 1885 has been. There he worked as an assistant teacher for agricultural chemistry and physiological botany and qualified as a lecturer in botany. In 1873 the professorship for zoology and botany held by Moritz August Seubert was split and Just received the representation for botany, first as a private lecturer and from 1874 as an associate professor for agricultural chemistry and plant physiology. In 1877 he was appointed full professor of botany and director of the Botanical Institute. In 1886/87 he took over the rectorate of the technical university .

As early as 1872, Just had set up an agricultural seed testing institute at the Botanical Institute, which was taken over by the Baden state as a plant physiological testing institute in 1884. In 1889 it was renamed the Agricultural-Botanical Research Institute, in 1901 it was merged with the Agricultural-Chemical Research Institute to form the State Agricultural Research Institute and relocated to the Augustenberg estate. In 1880 he founded the botanical garden at the former Durlacher Tor on the site of the former grand ducal vegetable garden, which was continued by Ludwig Klein (1857–1928) after Just's death . In his position as scientific director of the Mannheim Tobacco Association, Just arranged for the cultivation of tobacco to test the most suitable varieties for southern Germany on the site. He also founded a testing institute for food at the technical university, to which a bacteriological station was attached in 1889.

Just himself produced only a few independent scientific publications. He made a name for himself in scientific botany by publishing the "Botanical Annual Report" founded by him in 1874, which he edited until 1885. From 1881 to 1886 he also took over the editing of the "Botanische Zeitung" with Anton de Bary . Just was appointed Hofrat by the Baden government and was elected a member of the German Academy of Sciences Leopoldina on January 4, 1878 .

Just's health has been unstable since his youth. Already his intention to devote himself to the mountain subject he had to give up and take several breaks during his studies. He spent the winter of 1882/83 to relax in Italy , mainly on Capri . After he collapsed unconscious on the street on June 24, 1891, he recovered in Baden-Baden and suffered a stroke there on August 30 . The funeral took place on September 6th in Karlsruhe, at which Carl Engler gave the funeral speech.

Leopold Just married Katharina Grahl (1847–1933) in 1873, the youngest daughter of the painter August Grahl . The marriage had a daughter and a son, the physical chemist Gerhard Just .

Works

  • Germination and first development of Secale cereale under the influence of light . Inaugural dissertation of the Philosophical Faculty of the Royal University of Wroclaw to obtain the doctorate. Printed by Heinrich Lindner, Breslau 1870 ( hathitrust.org ).
  • The germination of Triticum vulgare . A contribution to the study of the migration of substances in plants. In: Adolph Blankenhorn , Leonhard Roesler (ed.): Annalen der Oenologie . Scientific journal for viticulture, wine treatment and wine processing. tape 3 , no. 4 . Carl Winter's University Bookstore, Heidelberg 1873, p. 339–376 , urn : nbn: de: bvb: 12-bsb11044497-5 .
  • Investigations into the resistance that the skin structures oppose to evaporation . In: Ferdinand Julius Cohn (Ed.): Contributions to the biology of plants . tape 1 , no. 3 . J. U Kern's Verlag (Max Müller), Breslau 1875, p. 11-29 ( biodiversitylibrary.org ).
  • About the action of higher temperatures on the preservation of the germinability of the seeds . In: Ferdinand Julius Cohn (Ed.): Contributions to the biology of plants . tape 2 , no. 3 . J. U Kern's Verlag (Max Müller), Breslau 1877, p. 311-348 ( biodiversitylibrary.org ).
  • Phyllosiphon Arisari . In: Leopold Just, Anton de Bary (Ed.): Botanische Zeitung . 40th year, no. 1-4 . Arthur Felix publisher, Leipzig 1882, Sp. 1-8, 17-26, 33-47, 49-57 ( biodiversitylibrary.org ).
  • About the possibility of replacing the carbonic acid, which is processed under normal conditions by green, illuminated plants, with carbon dioxide gas . In: Ewald Wollny (Ed.): Research in the field of agricultural physics . tape 5 . Carl Winter's University Bookstore, Heidelberg 1882, p. 60-79 .
  • For assessing vegetation damage caused by acid gases . Together with H. Heine. In: Friedrich Nobbe (ed.): The agricultural test stations . Organ for scientific research in the field of agriculture. tape 36 . Published by Paul Parey, Berlin 1889, p. 135-158 .
  • Floury and glassy barley . Together with H. Heine. In: Friedrich Nobbe (ed.): The agricultural test stations . Organ for scientific research in the field of agriculture. tape 36 . Published by Paul Parey, Berlin 1889, p. 269-285 .

literature

Web links
personal data
SURNAME Just, Leopold
ALTERNATIVE NAMES Just, Johann Leopold (full name)
BRIEF DESCRIPTION German botanist
DATE OF BIRTH May 27, 1841
PLACE OF BIRTH Filehne , Poznan Province
DATE OF DEATH August 30, 1891
Place of death Baden-Baden