Geosmin (/ dʒiˈɒzmɪn / jee-OZ-min) is an irregular sesquiterpenoid with a distinct earthy or musty odor, which most people can easily smell. The geosmin odor detection threshold in humans is very low, ranging from 0.006 to 0.01 micrograms per liter in water. [1]

2020年4月17日 · Scientists have known about the chemical compound behind the evocative scent of newly moistened soil, called geosmin, since the 1960s, but only now have researchers arrived at what may be an...

2023年6月7日 · Geosmin is a bicyclic alcohol produced by certain blue-green algae (cyanobacteria) and bacteria (mainly Actinomyces, such as Streptomyces). The compound has an earthy, musty, or muddy scent. Humans are highly sensitive to smelling or tasting geosmin. Its odor is detectable at levels as low as 5 parts per trillion. Many animals also smell geosmin.

2021年10月19日 · Geosmin is the pleasant smell of soil and dirt — that earthy scent you notice after rain. It is one of the chemicals that makes the smell of petrichor. Out of the petrichor chemicals, I choose to highlight geosmin, though, because microbes produce it. Here’s a great infographic from the American Chemical Society that explains petrichor.

2020年3月23日 · Geosmin is a natural bicyclic terpene with an earthy odor. According to The Merck Index, it is the “major volatile component of beet essence, also . . . the potent earthy odor contaminant of fish, beans, [and] water.” The human nose can detect it …

2025年1月18日 · Geosmin is a terpene produced by bacteria (mainly Streptomyces) and fungi found in soils and bodies of fresh water. Geosmin and other terpenes, such as 2-methyl-isoborneol (2-MIB), are soluble and volatile odorants that contribute to petrichor, the smell of rain.

(-)-geosmin is the (-)-stereoisomer of geosmin, having 4S,4aS,8aR configuration. It is an enantiomer of a (+)-geosmin. Geosmin has been reported in Basella alba, Zea mays, and other organisms with data available. Geosmin is a metabolite found in …

2025年3月17日 · Explore the science behind geosmin, the compound responsible for Earth's distinct earthy scent, and its role in nature, perception, and flavor.

2023年2月21日 · The bacterial geosmin synthase is a fascinating bifunctional enzyme that has been discovered almost two decades ago. Several aspects of the cyclisation mechanism from FPP to geosmin are known, but a detailed picture of …

2024年7月20日 · Geosmin, a bicyclic alcohol, is characterized by its unique molecular structure that contributes to its distinctive odor. The compound’s chemical formula is C12H22O, and it …