Oppau Explosion 1921
Oppau may refer to: * Ludwigshafen-Oppau, a suburb of Ludwigshafen, Germany ** Oppau explosion, which occurred there in 1921 * Opawa, Lower Silesian Voivodeship (German: ''Oppau''), Poland * Zábřeh, Dolní Benešov, Czech Republic; See List of historical German and Czech names for places in the Czech Republic See also * Opava (other) * Opawa (other) Opawa may refer to: ;Poland * Opawa, Lower Silesian Voivodeship, a village in SW Poland ; New Zealand: * Ōpaoa River (formerly called the Opawa River), a river through Blenheim ** Opawa River Bridge, a bridge in Blenheim * Little Opawa River, a ...

Ludwigshafen-Oppau
Ludwigshafen, officially Ludwigshafen am Rhein (; meaning "Ludwig's Port upon Rhine"), is a city in the German state of Rhineland-Palatinate, on the river Rhine, opposite Mannheim. With Mannheim, Heidelberg, and the surrounding region, it forms the Rhine Neckar Area. Known primarily as an industrial city, Ludwigshafen is home to BASF, the world's largest chemical producer, and other companies. Among its cultural facilities are the Staatsphilharmonie Rheinland-Pfalz. It is the birthplace and deathplace of the former German chancellor Helmut Kohl. In 2012, Ludwigshafen was classified as a global city with ' Sufficiency' status by the Globalization and World Cities Research Network (GaWC). History Early history In antiquity, Celtic and Germanic tribes settled in the Rhine Neckar area. During the 1st century B.C. the Romans conquered the region, and a Roman auxiliary fort was constructed near the present suburb of Rheingönheim. The Middle Ages saw the foundation of some ...
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Oppau Explosion
The Oppau explosion occurred on September 21, 1921, when approximately 4,500 tonnes of a mixture of ammonium sulfate and ammonium nitrate fertilizer stored in a tower silo exploded at a BASF plant in Oppau, now part of Ludwigshafen, Germany, killing 500–600 people and injuring about 2,000 more. Background The plant began producing ammonium sulfate in 1911, but during World War I when Germany was unable to obtain the necessary sulfur, it began to produce ammonium nitrate as well. Ammonia could be produced without overseas resources, using the Haber process, and the plant was the first of its kind to do so in the world. Compared to ammonium sulfate, ammonium nitrate is strongly hygroscopic, thus the mixture of ammonium sulfate and nitrate compresses under its own weight, turning it into a plaster-like substance in the silo. The workers needed to use pickaxes to get it out, a problematic situation because they could not enter the silo and risk being buried in collapsing fe ...
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Opawa, Lower Silesian Voivodeship
Opawa is a village in the administrative district of Gmina Lubawka, within Kamienna Góra County, Lower Silesian Voivodeship, in south-western Poland. Gallery File:Opawa (003).jpg, Main road File:Opawa (022).jpg, Houses by the road File:Opawa (023).jpg, World War I memorial File:Opawa (050).jpg, Ruin of the manor Opawa Opawa is an inner suburb of Christchurch, New Zealand, located 2.5 kilometres south-east of the city centre. The name is a contraction of "Ōpāwaho", which, in Māori, means a place of ('ō') an outer '' pā'' or outpost ('pāwaho'). "Ōpāwa ...

List Of Historical German And Czech Names For Places In The Czech Republic
The names of places in what is today the Czech Republic have evolved during their history. The list concerns primarily the settlements, but bilingual names for significant mountains and rivers are also listed. Places are sorted alphabetically according to their German names. Many of the German names are now exonyms, but used to be endonyms commonly used by the local German population, who had lived in many of these places until shortly after World War II. Until 1866, the only official language of the Austrian Empire administration was German. Some place names were merely "Germanized" versions of the original Czech names, as seen e.g. from their etymology. The compromise of 1867 marked a recognition of the need for bilingualism in areas where an important portion of the population used another language; the procedure was imposed by official instructions in 1871.Sprachenverordnungen – Erlass vom 2. April 1871 – Amtliche Einführung doppelsprachiger Stempel (Klein – Chronologi ...
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Opava (other)
Opava is a city in the Moravian-Silesian Region, Czech Republic. Opava may also refer to: * Opava District, a district (okres) within Moravian-Silesian Region of the Czech Republic with capital at Opava * Opava, Veľký Krtíš District, a village in the Banská Bystrica Region of Slovakia * Opava (river), a river in the Czech Republic * Duchy of Opava was a historic territory centered on the city of Opava See also * Opawa, a suburb of Christchurch, New Zealand * Opawa (other) * Dukes of Opava Duke is a male title either of a monarch ruling over a duchy, or of a member of royalty, or nobility. As rulers, dukes are ranked below emperors, kings, grand princes, grand dukes, and sovereign princes. As royalty or nobility, they are ...