Colloid scientist Raphael Liesegang

Raphael Eduard Liesegang was the son of the later factory owner Paul Eduard Liesegang (1838 – 1896) born. The father had studied in Jena Physics, where he Ernst Abbe (1840 – 1905) met. So he came in close contact with the look and with the construction of projectors began.

After graduation, he went into the of his father Wilhelm Eduard Liesegang 1854 photograpische founded an art studio. The grandfather of Raphael Liesegang enlarged his studio and also unveiled her cameras and delivered to the albumin-made paper.

After the death of his grandfather, the business was 1871 enlarged and moved to Dusseldorf. Thus Raphael came with two years with his four siblings to Dusseldorf and was here 1876 enrolled in school.

He frequently skipped school and did not do his homework. In the third year he received tutoring in mathematics, But the numbers did not improve understanding of. In high school, in sixth grade, he had great difficulty with writing, learn a poem by heart was impossible for him, although he retained the sense, but not in the form. Besides, he could read and speak, but not reading. Again, he had an excellent memory.

He stayed in the Sexta sit and was taken from the school. After a year of private lessons, he moved to the secondary school, of which he 1881 to 1887 with moderate success, and between temporal seat Stay, with the "annuals” today's College student, left.

The family spent their holidays happy in Holland. Here purchased Raphael Liesegang an application written in Dutch grammar of the Malay Language, which he under the school desk, Translate into German during the bottom Report Creation. This grammar was published in his father's own publishing, from the 1860 The magazine published photographic archive.

This was the first of many books and publications Liesegang, which he wrote during his life. During this time it was Liesegang request, To become a painter. His father taught him in the attic of a studio. On Sundays, he took lessons from a painter. Here, he was resting from his brothers and his sister. The father wanted to know about the career of the painter nothing, and so this request was slowly added.

In Grönenbach Allgäu occupied Raphael a course on photography and photo-mechanical process and then moved for a year to Carl Remigius Fresenius (1818 – 1897) to Wiesbaden, where he took a course on analytical chemistry. 1888 He went to study chemistry in Freiburg, where he attended but virtually no lectures. Interestingly, he found the coffee house life, where he made the acquaintance of actresses and actors. During the semester break, he wrote scientific papers and books. So u. a. 1888 on photosensitive organic silver salts in Photographischen Archives and 1891 the book contributions to the problem of electrical television.

Not finish, since he did not attend lectures and examinations took off, He began 1892 to work in the photographic factory of his father. Here he developed 1892 The first matte Zelloidinpapier and hydroquinone developer Aristogen. Liesegang worked on many problems of photography, It appeared about a lot of work. 1896 He reported on periodic precipitation phenomena in gels, the later of Wilhelm Ostwald (1853 – 1932) Liesegangsche rings were called.

When the father 1896 died, took Raphael Liesegang and two of his brothers, the factory. He presented first to the manual preparation of Zelloidinpapieres on preparation machines, which his father previously always rejected. As the Farbenfabriken Friedrich Bayer & Co. Leverkusen interested in the photographic paper- and developer department showed, he sold this part of the company 1907, later the oldest part of the Agfa. The optical department was taken over by his brothers in Dusseldorf, resigned from the company while Raphael.

1908 he went to the Senckenberg Museum in Frankfurt, where he L. By Edinger at the Neurological Institute at Silberimprägnationen brain tissues (Golgi method) the fine branches of neurons made visible. During World War I, he led the Narkotikaabteilung the medical supplies depot in Frankfurt. He then worked for a time in a paper factory. 1921 was R. It. Liesegang staff at the Kaiser Wilhelm Institute for Biophysics in Frankfurt and 1937 Ibid head of the Institute of Colloids research. 1944 The Institute was moved to Bad Homburg.

Raphael Liesegang had to 12. November 1947 worked. He had a cold and lost consciousness during the night. He died on 13. November compared 18 Clock at a pulmonary infarction. He was a truly extraordinary man. Today it would be as “workoholiker” denote. He wrote of his 500 Z publications. T. under different pseudonyms. The versatility of his themes is remarkable. I am not a scientist known colloid, who has worked so versatile. He also wrote 14 Dramas, and was editor and contributor to various magazines, he wrote z. B. for the colloid-magazine about 13 000 Speeches. He was also editor of a scientific book series on 50 Volumes in Theodor Steinkopff Publishers, Dresden.

Family:

From his two marriages are the daughters Edith Maria Victoria Mara Liesegang (1896-1948) also writer and Ewa Martha Carola Hildeganrd (1909-1952) a remarkable, helpful, wise and brave woman, which during the war not only took care of her father touching, but also many persecuted Jews offered help. Ewa Liesegang died after a car accident. At one ungated railroad crossing her car was hit by a train.

To write a biography of this great colloid scientists is very difficult, by R. It. Liesegang personally very reserved and private lived very little is known about him. The current findings researched and lovingly assembled by Klaus Beneke (Uni Kiel), with the participation of Margit Rambow, Helmut Fleckenstein, Marianne Krohnen and others as a biography can here be gleaned.

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