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Natural sources originated either from biology or deposits of nitrates produced by atmospheric reactions. Nitrogen fixation by industrial processes like the Frank–Caro process (1895–1899) and Haber–Bosch process (1908–1913) eased this shortage of nitrogen compounds, to the extent that half of global food production now relies on ...
IOCG deposits typically occur at the margins of large igneous bodies which intrude into sedimentary strata. As such, IOCG deposits form pipe-like, mantle-like or extensive breccia-vein sheets within the host stratigraphy. Morphology is often not an important criterion of the ore body itself, and is determined by the host stratigraphy and ...
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This list of Boeing B-17 Flying Fortress operators is a list of users who flew and operated the Boeing B-17.. The B-17 was among the first mass-produced four-engined heavy bombers.
SARS-CoV-2 Variant; Alpha: Scientifically accurate atomic model of the external structure of SARS-CoV-2. Each "ball" is an atom. General details; WHO Designation
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Mali, [c] officially the Republic of Mali, [d] is a landlocked country in West Africa.It is the eighth-largest country in Africa, with an area of over 1,240,192 square kilometres (478,841 sq mi). [9]
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