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2. Ol Doinyo Lengai - Wikipedia

   en.wikipedia.org/wiki/Ol_Doinyo_Lengai

   Ol Doinyo Lengai is an active volcano in northern Tanzania.It consists of a volcanic cone with two craters, the northern of which has erupted during historical time. Uniquely for volcanoes on Earth, it has erupted natrocarbonatite, [3] an unusually low temperature and highly fluid type o

3. Multi-component gas analyzer system - Wikipedia

   en.wikipedia.org/wiki/Multi-Component_Gas...

   A multi-component gas analyzer system (Multi-GAS) is an instrument package used to take real-time high-resolution measurements of volcanic gases. [1] A Multi-GAS package includes an infrared spectrometer for CO 2 , two electrochemical sensors for SO 2 and H 2 S , and pressure–temperature–humidity sensors, all in a weatherproof box.

4. Aroma compound - Wikipedia

   en.wikipedia.org/wiki/Aroma_compound

   Fragrance bottles. An aroma compound, also known as an odorant, aroma, fragrance or flavoring, is a chemical compound that has a smell or odor.For an individual chemical or class of chemical compounds to impart a smell or fragrance, it must be sufficiently volatile for transmission via the air to the olfactory system in the upper part of the nose.

5. Light Blue (fragrance) - Wikipedia

   en.wikipedia.org/wiki/Light_Blue_(fragrance)

   Light Blue is a fragrance line by Italian fashion designers Dolce & Gabbana which was launched in 2001 and has won numerous fragrance-industry awards. The men's version (Light Blue Pour Homme) was released in 2007 and has also won awards, including the FiFi Awards in 2008.

6. Volcano warning schemes of the United States - Wikipedia

   en.wikipedia.org/wiki/Volcano_warning_schemes_of...

   In October 2006, the United States Geological Survey (USGS) adopted a nationwide alert system for characterizing the level of unrest and eruptive activity at volcanoes. The system is now used by the Alaska Volcano Observatory, the California Volcano Observatory (California and Nevada), the Cascades Volcano Observatory (Washington, Oregon and Idaho), the Hawaiian Volcano Observatory and the ...

7. Note (perfumery) - Wikipedia

   en.wikipedia.org/wiki/Note_(perfumery)

   Fragrance pyramid. Notes in perfumery are descriptors of scents that can be sensed upon the application of a perfume. Notes are separated into three classes: top/head notes, middle/heart notes, and base/soul notes; which denote groups of scents which can be sensed with respect to the time after the application of a perfume.