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Paradas Method
The paradas method ( es, método de paradas, ''sistema de paradas'') was a process to extract nitrate from caliche by leaching. In this method caliche was boiled in water in large pans called "paradas". It was a firewood and labour-intensive process. The paradas method was phased out in the 1850s by a new system invented by Pedro Gamboni which required less fuel and labour. The paradas method led to a massive deforestation of Pampa del Tamarugal around La Tirana La Tirana is a Chilean town in the commune of Pozo Almonte in El Tamarugal Province, Tarapacá Region. The town lies in an oasis in the middle of the Pampa del Tamarugal, about 72 km inland from the port of Iquique. The town is notable for i ... and Canchones and some areas to the south of these localities. References Economic history of Bolivia Economic history of Chile History of mining in Chile Economic history of Peru Mineral processing {{Mining-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitratine
Nitratine or nitratite, also known as cubic niter (UK: nitre), soda niter or Chile saltpeter (UK: Chile saltpetre), is a mineral, the naturally occurring form of sodium nitrate, NaNO3. Chemically it is the sodium analogue of saltpeter. Nitratine crystallizes in the trigonal system, but rarely occurs as well formed crystals. It is isostructural with calcite. It is quite soft and light with a Mohs hardness of 1.5 to 2 and a specific gravity of 2.24 to 2.29. Its refractive indices are nω=1.587 and nε=1.336. The typical form is as coatings of white, grey to yellowish brown masses. The rare crystals when found typically have the scalenohedral form of the calcite structure. It is found only as an efflorescence in very dry environments. It is very soluble in water such that it is deliquescent and will absorb water out of the air and turn into a ''puddle'' of sodium nitrate solution when exposed to humid air. Nitratine was once an important source of nitrates for fertilizer and other ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caliche
Caliche () is a sedimentary rock, a hardened natural cement of calcium carbonate that binds other materials—such as gravel, sand, clay, and silt. It occurs worldwide, in aridisol and mollisol soil orders—generally in arid or semiarid regions, including in central and western Australia, in the Kalahari Desert, in the High Plains of the western United States, in the Sonoran Desert, Chihuahuan Desert and Mojave Desert of North America, and in eastern Saudi Arabia at Al-Hasa. Caliche is also known as calcrete or kankar (in India). It belongs to the duricrusts. The term ''caliche'' is Spanish and is originally from the Latin ''calx'', meaning lime. Caliche is generally light-colored, but can range from white to light pink to reddish-brown, depending on the impurities present. It generally occurs on or near the surface, but can be found in deeper subsoil deposits, as well. Layers vary from a few inches to feet thick, and multiple layers can exist in a single location. A caliche laye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaching (chemistry)
Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent. Leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods. Specific extraction methods depend on the soluble characteristics relative to the sorbent material such as concentration, distribution, nature, and size. Leaching can occur naturally seen from plant substances (inorganic and organic), solute leaching in soil, and in the decomposition of organic materials. Leaching can also be applied affectedly to enhance water quality Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage. It is most frequently used by reference to a set of standards against which compliance, generally achieved through tr ... and contaminant removal, as well as for disposal of hazardous waste products such as fly ash, or Rare-earth element, rare ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pedro Gamboni
Pedro Gamboni (September 26, 1825 - December 27, 1895) was a Chilean chemical engineer who did important studies related to saltpeter and iodine in the regions of Tarapaca and Antofagasta.Gamboni invented a new method to extract nitrate from caliche leading to the phasing out of the older firewood and labour intensive paradas method The paradas method ( es, método de paradas, ''sistema de paradas'') was a process to extract nitrate from caliche by leaching. In this method caliche was boiled in water in large pans called "paradas". It was a firewood and labour-intensive proces ... in the 1850s. References 1825 births 1895 deaths Chilean chemical engineers Saltpeter works in Chile Chilean inventors {{Chile-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historia (history Of The Americas Journal)
''Historia'' is a peer-reviewed academic journal specialising in the history of the Americas and Chile. It was established in 1961 and its first director was Jaime Eyzaguirre. The first editorial committee included Ricardo Krebs, Gonzalo Vial, Gabriel Guarda, Armando de Ramón, Julio González and Carlos Oviedo. Javier González acted as secretary. Apart from original articles the journal includes a bibliography Bibliography (from and ), as a discipline, is traditionally the academic study of books as physical, cultural objects; in this sense, it is also known as bibliology (from ). English author and bibliographer John Carter describes ''bibliography ... of any history publication about Chile or written by a Chilean in the period that precedes the journal deem relevant. External links * References {{reflist History of the Americas journals Biannual journals Publications established in 1961 Pontifical Catholic University of Chile academic journals Spanish-languag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deforestation
Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests. About 31% of Earth's land surface is covered by forests at present. This is one-third less than the forest cover before the expansion of agriculture, a half of that loss occurring in the last century. Between 15 million to 18 million hectares of forest, an area the size of Bangladesh, are destroyed every year. On average 2,400 trees are cut down each minute. The Food and Agriculture Organization of the United Nations defines deforestation as the conversion of forest to other land uses (regardless of whether it is human-induced). "Deforestation" and "forest area net change" are not the same: the latter is the sum of all forest losses (deforestation) and all forest gains (forest expansion) in a gi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pampa Del Tamarugal
Pampa del Tamarugal ("Plateau of the Tamarugal") is a vast plain encompassing a significant portion of the Norte Grande, Chile, and originally named for the ''Prosopis tamarugo'' trees that used to cover its surface. It is located between the parallels 19°30’ and 22°15’ south latitude and is considered part of the Atacama Desert. It is bounded on the west by the Chilean Coastal Range and on the east by the western slopes of the Andes. The plain occupies a surface area of 12,500 km2 with an average elevation of 1,100 m. Tourism Among the major tourist attractions in the Pampa del Tamarugal are the world heritage site Humberstone and Santa Laura Saltpeter Works, the town of La Tirana, and the Pampa del Tamarugal National Reserve. Gallery File:Pampa del Tamarugal 3.jpg, A modern forest in Pampa del Tamarugal as seen from Chile Route 5 File:Pintados2.jpg, Pre-Hispanic geoglyphs next to Pampa del Tamarugal File:Pampa_del_Tamarugal_2.jpg, A modern forest in Pampa del Tama ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Tirana
La Tirana is a Chilean town in the commune of Pozo Almonte in El Tamarugal Province, Tarapacá Region. The town lies in an oasis in the middle of the Pampa del Tamarugal, about 72 km inland from the port of Iquique. The town is notable for its religious feast in honor of Our Lady of Mount Carmel. It is celebrated on July 16 of each year, being the most important religious feast of the Norte Grande. The area around La Tirana was deforested in the 19th century largely as a result of high demand for firewood driven by the paradas method used to process saltpeter Potassium nitrate is a chemical compound with the chemical formula . This alkali metal nitrate salt is also known as Indian saltpetre (large deposits of which were historically mined in India). It is an ionic salt of potassium ions K+ and nitrat .... References Populated places in El Tamarugal Province {{Tarapacá-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Universitat De Barcelona
The University of Barcelona ( ca, Universitat de Barcelona, UB; ; es, link=no, Universidad de Barcelona) is a public university located in the city of Barcelona, Catalonia, in Spain. With 63,000 students, it is one of the biggest universities in Spain. It is one of the oldest universities in both Catalonia and Spain, established in 1450. It is considered one of the best universities in Spain. Overall, the UB has been ranked 1st in Spain in most of the 2022-2023 rankings and is located around the 50th place in Europe. It has 106 departments and more than 5,000 full-time researchers, technicians and research assistants, most of whom work in the 243 research groups as recognized and supported by the Government of Catalonia. In 2010, the UB was awarded 175 national research grants and 17 European grants and participated in over 500 joint research projects with the business sector, generating an overall research income of 70 million euros. The work of these groups is overseen by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Economic History Of Bolivia
The economy of Bolivia is the 95th-largest economy in the world in nominal terms and the 87th-largest economy in terms of purchasing power parity. Bolivia is classified by the World Bank to be a lower middle income country. With a Human Development Index of 0.703, it is ranked 114th (high human development). In recent history, Bolivia has consistently led Latin America in measures of economic growth, fiscal stability and foreign reserves. The Bolivian economy has had a historic pattern of a single-commodity focus. From silver to tin to coca, Bolivia has enjoyed only occasional periods of economic diversification. Political instability and difficult topography have constrained efforts to modernize the agricultural sector. Similarly, relatively low population growth coupled with low life expectancy has kept the labor supply in flux and prevented industries from flourishing. Rampant inflation and corruption previously created development challenges, but in the early twenty-first cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Economic History Of Chile
The economy of Chile has shifted substantially over time from the heterogeneous economies of the diverse indigenous peoples to an early husbandry-oriented economy and finally to one of raw material export and a large service sector. Chile's recent economic history (since 1973) has been the focus of an extensive debate from which neoliberalism acquired its modern meaning. Chile emerged into independence as a rural economy on what was the periphery of the Spanish Empire. A period of relative free trade that began with independence in the 1810s brought a modernizing development of certain sectors of the Chilean economy. This was accompanied by formation of a local business class, a novelty in Chile. Chile experienced its first modern economic crisis with the Long depression in the 1870s. The exploitation of lucrative nitrate deposits of the north conquered in the War of the Pacific (1879–1884) marked a whole epoch in the history of Chile and the economic legacy of nitrate has been w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
