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 ==== Jan Baptista van Helmont ====
-Jan Baptista van Helmont (1579 or 1580 - 1644) - Flemish physician, physiologist, and alchemist who demonstrated the existence of various gaseous substances, including carbon dioxide. He is the originator of the term "gas", a model of the Greek χάος 'cháos'. His theory of 'ferments' as triggers of physiological processes foreshadowed the discovery of substances now called enzymes. Helmont is believed to have begun the transformation of alchemy into chemistry. However, he did not reject mysticism and believed in the existence of the philosopher's stone. [([[https://www.britannica.com/biography/Jan-Baptista-van-Helmont|Britannica]])]
+Jan Baptista van Helmont (1579 or 1580 - 1644) was a Flemish physician, physiologist, and alchemist who demonstrated the existence of various gaseous substances, including carbon dioxide. He is the originator of the term "gas," a model of the Greek χάος "cháos." His theory of "ferments" as triggers of physiological processes foreshadowed the discovery of substances now called enzymes. Helmont is believed to have begun the transformation of alchemy into chemistry. However, he did not reject mysticism and believed in the existence of the philosopher's stone. [([[https://www.britannica.com/biography/Jan-Baptista-van-Helmont|Britannica]])]
 ==== Producer of Natural Gas ====
-The second-largest producer of natural gas in Europe is the Netherlands. 50% of the gas produced in the Netherlands comes from the Groningen gas field, which is the largest in Europe and the tenth-largest in the world. The remaining 50% comes from the production of some 300 smaller gas fields, mainly scattered in the North Sea. [([[https://www.eia.gov/international/analysis/country/NLD|U.S. Energy Information Administration]])]
+The second-largest producer of natural gas in Europe is the Netherlands — 50 percent of the gas produced in the Netherlands comes from the Groningen gas field, which is the largest in Europe and the tenth-largest in the world. The remaining 50 percent comes from the production of some 300 smaller gas fields, mainly scattered in the North Sea. [([[https://www.eia.gov/international/analysis/country/NLD|U.S. Energy Information Administration]])]
 ==== Iodine ====
-Iodine occurs naturally in solid form - as a shiny, blue-black crystalline substance. When heated, by sublimation, it can change from a solid to a gaseous state. [([[https://www.livescience.com/37441-iodine.html|Live Science]])]
+Iodine occurs naturally in a solid form as a shiny, blue-black crystalline substance. When heated, by sublimation, it can change from a solid to a gaseous state. [([[https://www.livescience.com/37441-iodine.html|Live Science]])]
 ==== Uranus' atmosphere ====
-Uranus' atmosphere is about 83% hydrogen, 15% helium, 0.01% ammonia, and 0.00001% acetylene. [([[https://sos.noaa.gov/catalog/datasets/uranus/|Science on a Sphere]])]
+Uranus' atmosphere is about 83 percent hydrogen, 15 percent helium, 0.01 percent ammonia and 0.00001 percent acetylene. [([[https://sos.noaa.gov/catalog/datasets/uranus/|Science on a Sphere]])]
 {{tag>science people space}}

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