Root

The sole had more bacteria than the top of the foot, with differences in community composition and odor compounds. The study combined culture, DNA analysis, and volatile-compound measurement.

The same people used two toothpastes for one week each. A trial compared hydrogen sulfide and methyl mercaptan the following morning and after brushing.

An industry study mapped bacteria in household toilets and tested growth inhibition on fabrics and flooring exposed to volatile ingredients. We distinguish measured bacterial counts and adsorption from the intended deodorizing effect.

In a survey of 2,000 US consumers, more respondents selected a clean smell than a clean appearance as a cue to finished laundry. The paper considers household-product scent through function, experience, and emotion.

From compounds in healthy people’s breath to tongue coating and bacterial activity: a study used methyl mercaptan to investigate where oral malodor is produced and from what substrates.

A 21-day trial in 70 people compared brushing alone with brushing plus CPC mouthwash, examining morning malodor, sulfur compounds, and bacteria on the tongue and in plaque.