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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 migrants bring with them various aspects of Javanese cultures such as Gamelan music, traditional dances [3] and art of Wayang kulit shadow play. [4] The migration of Javanese people westward has created the Javanese culture in a small part of the northern coast that is distinct from the Sundanese culture in the majority of West Java and Banten.
Krupuk kulit (Javanese: rambak; Sundanese: dorokdok; Minangkabau: karupuak jangek, lit. 'skin crackers') is a traditional Indonesian cattle skin krupuk (cracker). [2] It is traditionally made from the soft inner skin of cattle ( cow or water buffalo ) which is diced and sun-dried until it hardens and loses most of its water content.
The bonang is an Indonesian musical instrument used in the Javanese gamelan. [1] It is a collection of small gongs (sometimes called "kettles" or "pots") placed horizontally onto strings in a wooden frame (rancak), either one or two rows wide.
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
Büchner flask A Büchner funnel is attached to the flask via a black elastomer adapter. The hose barb is connected via vacuum hose to a vacuum source such as an aspirator. ...
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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]