Question: What was Johann Christian Dieterich's friend the first to hold a dedicated professorship in in Germany?

Context paragraphs:
Johann Christian Cuno: Johann Christian Cuno (3 April 1708 in Berlin – 1783 in Durlach) was a German poet, writer, botanist and merchant, and was the son of a postal official in Berlin.  He was also known under the names of "Joan Christian Cuno, Johannes Christian Cuno" and "Johann Christ Cuno".

Johann Christian Simon Handt: Johann Christian Simon Handt (born Johann Christian Simon Hundt; 17947 July 1863) was a German-born Australian minister and missionary of Lutheran faith.  Known for being Queensland's first missionary or one of the first, Handt is also said to have brought in the first pineapples in Queensland.

Johann Christian von Stramberg: Johann Christian Hermenegild Joseph Franz de Paula Benjamin von Stramberg (13 October 1785 – 20 July 1868), commonly known as Johann Christian von Stramberg or Christian von Stramberg was a German historian.

Ernest Warburton: Ernest Warburton (10 June 1937 in Irlam – 7 August 2001 in London) was a noted musicologist who specialized in the music of Johann Christian Bach.  His efforts resulted in the publication from 1984 to 1999 of "The Collected Works of Johann Christian Bach" in 48 volumes.

Johann Christian Stark (the Elder): Johann Christian Stark (13 January 1753 – 11 January 1811) was a German physician and obstetrician born in Oßmannstedt.  His nephew, also named Johann Christian Stark (1769–1837), was a noted obstetrician.

Johann Adam Reincken: Johann Adam Reincken (also "Jan Adams, Jean Adam", "Reinken, Reinkinck, Reincke, Reinicke, Reinike"; baptized 10 December 1643 – 24 November 1722) was a Dutch/German organist and composer.  He was one of the most important German composers of the 17th century, a friend of Dieterich Buxtehude and a major influence on Johann Sebastian Bach; however, very few of his works survive to this day.

Johann Christian Kittel: Johann Christian Kittel (18 February 1732 – 17 April 1809) was a German organist, composer, and teacher.  He was one of the last students of Johann Sebastian Bach.  His students included , Karl Gottlieb Umbreit, Johann Wilhelm Hässler and Christian Heinrich Rinck.  See: .

Martin Hoffmann (luthier): Martin Hoffmann (1653–1719) was an important German luthier, based in Leipzig.  He was the father of Johann Christian Hoffmann (1683–1750), an important luthier, violin maker, and a friend and associate of Johann Sebastian Bach.

Georg Christoph Lichtenberg: Georg Christoph Lichtenberg (1 July 1742 – 24 February 1799) was a German scientist, satirist, and Anglophile.  As a scientist, he was the first to hold a professorship explicitly dedicated to experimental physics in Germany.  Today, he is remembered for his posthumously published notebooks, which he himself called "Sudelbücher", a description modelled on the English bookkeeping term "scrapbooks", and for his discovery of the strange tree-like electrical discharge patterns now called Lichtenberg figures.

Johann Christian Dieterich: Johann Christian Dieterich (1722–1800) was the founder of the Dieterich’schen Verlagsbuchhandlung publishing house and close friend of Georg Christoph Lichtenberg.  He published the first "Musen-Almanach".

Supporting paragraphs: Johann Christian Dieterich Georg Christoph Lichtenberg
Answer: experimental physics