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  2. Volatile organic compound - Wikipedia

    en.wikipedia.org/wiki/Volatile_organic_compound

    The majority of VOCs are produced by plants, the main compound being isoprene. Small amounts of VOCs are produced by animals and microbes. [24] Many VOCs are considered secondary metabolites, which often help organisms in defense, such as plant defense against herbivory.

  3. Plant communication - Wikipedia

    en.wikipedia.org/wiki/Plant_communication

    Plant communication encompasses communication using volatile organic compounds, electrical signaling, and common mycorrhizal networks between plants and a host of other organisms such as soil microbes, [2] other plants [3] (of the same or other species), animals, [4] insects, [5] and fungi. [6]

  4. NASA Study on Air-Purifying Houseplants Debunked: Here's the ...

    www.aol.com/lifestyle/nasa-study-air-purifying...

    Its results suggested that certain common indoor plants, like pothos, ivy and ficus, may absorb carbon dioxide and release oxygen through photosynthesis, and provide a natural way to remove toxic ...

  5. Vapor intrusion - Wikipedia

    en.wikipedia.org/wiki/Vapor_intrusion

    Vapor intrusion (VI) is the process by which chemicals, usually volatile organic compounds (VOCs), in soil or groundwater migrate to indoor air above or around a contaminated site. [1] The process of VI has been studied more recently in relation to its effects on humans and the environment, and is becoming more regulated by the United States ...

  6. Secondary organic aerosol - Wikipedia

    en.wikipedia.org/wiki/Secondary_organic_aerosol

    A secondary organic aerosol (SOA) is a molecule produced via oxidation over several generations of a parent organic molecule. [1] In contrast to primary organic aerosols, which are emitted directly from the biosphere , SOAs are either formed via homogeneous nucleation through the successive oxidation of gas -phase organic compounds , or through ...

  7. Anal gland - Wikipedia

    en.wikipedia.org/wiki/Anal_gland

    In non-human mammals, the secretions of the anal glands contain mostly volatile organic compounds with a strong odor, and they are thus functionally involved in communication. Depending upon the species, they may be involved in territory marking, individual identification, and sexual signalling, as well as defense.

  8. Smell as evidence of disease - Wikipedia

    en.wikipedia.org/wiki/Smell_as_evidence_of_disease

    The biochemical mechanism of VOC generation in the human body is not fully comprehended. [10] Their occurrence is due to changes in cell metabolism, inflammation, and oxidative stress, where reactive oxygen species (ROS) produced from cellular respiration interact with cellular structures (such as the membrane, proteins, DNA, and RNA) to create ...

  9. Persistent organic pollutant - Wikipedia

    en.wikipedia.org/wiki/Persistent_organic_pollutant

    Humans are primarily exposed to aldrin through dairy products and animal meats. Chlordane , an insecticide used to control termites and on a range of agricultural crops, is known to be lethal in various species of birds, including mallard ducks, bobwhite quail, and pink shrimp; it is a chemical that remains in the soil with a reported half-life ...