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Hermann Keck
Hermann Keck (1919 – 2010) was a German scientist who invented the Keck Clip. Keck was born in Treysa Treysa, an independent town until 1970, is the biggest ''Stadtteil'' of the German town Schwalmstadt. It was incorporated into Schwalmstadt in December 1970. The location around Treysa and Schwalmstadt is called Schwalm. The historic city lie ... and has two patents on his name: * Clip for fixing male and female parts of ground glass joints, (1984). * Handled clamp for ground glass ball and socket joints or the like, (1988).Design patent References {{DEFAULTSORT:Keck, Hermann 20th-century German chemists 1919 births 2010 deaths People from Schwalmstadt 20th-century German inventors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keck Clips
Ground glass joints are used in laboratories to quickly and easily fit leak-tight apparatus together from interchangeable commonly available parts. For example, a round bottom flask, Liebig condenser, and oil bubbler with ground glass joints may be rapidly fitted together to reflux a reaction mixture. This is a large improvement compared with older methods of custom-made glassware, which was time-consuming and expensive, or the use of less chemical resistant and heat resistant corks or rubber bungs and glass tubes as joints, which took time to prepare as well. One of the glassware items to be joined would have an ''inner'' (or male) ''joint'' with the ground glass surface facing outward and the other would have an ''outer'' (or female) ''joint'' of a correspondingly fitting taper with the ground glass surface facing inward. To connect the hollow inner spaces of the glassware components, ground glass joints are hollow on the inside and open at the ends, except for stoppers. Hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Glass Joint
Ground glass joints are used in laboratories to quickly and easily fit leak-tight apparatus together from interchangeable commonly available parts. For example, a round bottom flask, Liebig condenser, and oil bubbler with ground glass joints may be rapidly fitted together to reflux a reaction mixture. This is a large improvement compared with older methods of custom-made glassware, which was time-consuming and expensive, or the use of less chemical resistant and heat resistant corks or rubber bungs and glass tubes as joints, which took time to prepare as well. One of the glassware items to be joined would have an ''inner'' (or male) ''joint'' with the ground glass surface facing outward and the other would have an ''outer'' (or female) ''joint'' of a correspondingly fitting taper with the ground glass surface facing inward. To connect the hollow inner spaces of the glassware components, ground glass joints are hollow on the inside and open at the ends, except for stoppers. His ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treysa
Treysa, an independent town until 1970, is the biggest ''Stadtteil'' of the German town Schwalmstadt. It was incorporated into Schwalmstadt in December 1970. The location around Treysa and Schwalmstadt is called Schwalm. The historic city lies on a hill which is up to 35 meters higher than the valley where the river Wiera enters in the Schwalm. To protect the city of floods, a detention basin had been built. During the 8th century, the city Treise was a part of the Hersfeld Abbey. The counts of the district Ziegenhain, who have been reeves of the Abbey, conquered Treysa in 1186. The town's landmark is the so-called Totenkirche, which has been earlier called Martinskirche and had been built in 1230. Between 1229 and 1270, Treysa received its town charter. After the death of the last count of Ziegenhain, the complete countship entered into possession of the Landgraviate of Hesse. In August 1945, there had been conferences about the founding of the Evangelical Church in Germany i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1919 Births
Events January * January 1 ** The Czechoslovak Legions occupy much of the self-proclaimed "free city" of Pressburg (now Bratislava), enforcing its incorporation into the new republic of Czechoslovakia. ** HMY ''Iolaire'' sinks off the coast of the Hebrides; 201 people, mostly servicemen returning home to Lewis and Harris, are killed. * January 2– 22 – Russian Civil War: The Red Army's Caspian-Caucasian Front begins the Northern Caucasus Operation against the White Army, but fails to make progress. * January 3 – The Faisal–Weizmann Agreement is signed by Emir Faisal (representing the Arab Kingdom of Hejaz) and Zionist leader Chaim Weizmann, for Arab–Jewish cooperation in the development of a Jewish homeland in Palestine, and an Arab nation in a large part of the Middle East. * January 5 – In Germany: ** Spartacist uprising in Berlin: The Marxist Spartacus League, with the newly formed Communist Party of Germany and the Independent Social Democrat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2010 Deaths
This is a list of deaths of notable people, organised by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked here. 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 See also * Lists of deaths by day * Deaths by year {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Schwalmstadt
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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