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It is commonly thought to be named after the Nobel Laureate Eduard Buchner (without umlaut), but it is actually named after the industrial chemist Ernst Büchner. [2] A Büchner funnel fitted with Sintered Disc made of Boro 3.3 Glass. Diagram of filtration set-up using a Büchner flask
Buchner funnels are made of porcelain and include a plate of sintered glass or perforated porcelain. These are used in filtration under low pressure with a Buchner flask. [2] Hot filtration funnel is a less commonly seen funnel where the funnel is jacketed, and surrounded by a heated fluid. [3]
The Buchner ring expansion is a two-step organic C-C bond forming reaction used to access 7-membered rings. The first step involves formation of a carbene from ethyl diazoacetate , which cyclopropanates an aromatic ring.
The short tube and hose barb effectively act as an adapter over which the end of a thick-walled flexible hose (tubing) can be fitted to form a connection to the flask.
Two funnels: A - Cone, or Pear-shaped, B - cylindrical. A separating funnel takes the shape of a cone with a hemispherical end. It has a stopper at the top and stopcock (tap), at the bottom.
A funnel (E) contains a sample of soil or leaf litter (D), and a heat source (F), in this case an electric lamp (G), heats the sample. Animals escaping from the desiccation of the sample descend through a filter (C) into a preservative liquid (A) in a receptacle (B).
His father was the pharmacist, chemist, industrialist and politician Wilhelm Büchner.Ernst was also the nephew of the playwright Georg Büchner and the philosopher, physiologist and physician Ludwig Büchner.
Johann Andreas Buchner (6 April 1783 – 5 June 1852) was a German pharmacologist working in the area of alkaloids. He was the father of pharmacologist Ludwig Andreas Buchner (1813–1897). He was born in Munich and studied at Johann Bartholomäus Trommsdorff 's pharmaceutical institute in Erfurt , obtaining his PhD in 1807.