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  2. Yes, You Really Need To Clean Your Bathroom Exhaust Fan ... - AOL

    www.aol.com/yes-really-clean-bathroom-exhaust...

    To keep your bathroom exhaust fan dust-free and properly functioning, it's best to clean your fan once every six months or more if your fan gets dusty quick. Regularly inspect your fan for any ...

  3. These High-Tech Bathroom Fans Do More Than Clear Steam ... - AOL

    www.aol.com/news/high-tech-bathroom-fans-more...

    From built-in speakers to dimmable lighting, the best bathroom exhaust fans can do more than just clear unpleasant odors and hot steam.

  4. Air freshener - Wikipedia

    en.wikipedia.org/wiki/Air_freshener

    Air fresheners from Febreze. Air fresheners are products designed to reduce unwanted odors in indoor spaces, or to introduce pleasant fragrances, or both. They typically emit fragrance to mask odors but may use other methods of action such as absorbing, bonding to, or chemically altering compounds in the air that produce smells, killing organisms that produce smells, or disrupting the sense of ...

  5. Indoor mold - Wikipedia

    en.wikipedia.org/wiki/Indoor_mold

    Mold is detectable by smell and signs of water damage on walls or ceiling and can grow in places invisible to the human eye. It may be found behind wallpaper or paneling, on the inside of dropped ceilings, the back of drywall, or the underside of carpets or carpet padding. Piping in walls may also be a source of mold, since they may leak ...

  6. Odor detection threshold - Wikipedia

    en.wikipedia.org/wiki/Odor_detection_threshold

    The odor detection threshold is the lowest concentration of a certain odor compound that is perceivable by the human sense of smell. The threshold of a chemical compound is determined in part by its shape, polarity, partial charges, and molecular mass. The olfactory mechanisms responsible for a compound's different detection threshold is not ...

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  8. Vibration theory of olfaction - Wikipedia

    en.wikipedia.org/wiki/Vibration_theory_of_olfaction

    The vibration theory of smell proposes that a molecule's smell character is due to its vibrational frequency in the infrared range. This controversial theory is an alternative to the more widely accepted docking theory of olfaction (formerly termed the shape theory of olfaction), which proposes that a molecule's smell character is due to a range of weak non-covalent interactions between its ...

  9. With bird flu cases rising, certain kinds of pet food may be ...

    www.aol.com/news/bird-flu-cases-rising-certain...

    After Villain died, the state tested bags of unopened and opened bags of Northwest Naturals products in Acfalle’s home. Only the opened bag of turkey food was positive for bird flu; the strain ...