If you’ve seen an owl fly, you probably didn’t hear a thing. That’s because their skin and feathers dampen sound by absorbing high- and low-frequency flight noise. Inspired by this natural soundproofing, researchers publishing in ACS Applied Materials & Interfaces developed a two-layer aerogel that mimics the structures inside owl feathers and skin to mitigate sound pollution. This new material could be used in cars and manufacturing facilities to reduce traffic and industrial noise.

Drinking a smoothie is a popular way to consume fruits and vegetables, many of which are rich in micronutrients called polyphenols. If this beverage is purchased at a store, it’s likely been pasteurized with heat or pressure to prevent harmful bacteria growth and extend shelf-life. Now, a preliminary study in ACS’ Journal of Agricultural and Food Chemistry reports that processing smoothies with high heat could also make polyphenols easier for the gut microbiome to absorb.

Breathalyzers are a frequently used tool to measure the amount of ethanol in someone’s breath, which relates to their blood alcohol content. However, alcoholic beverages contaminated by methanol (sometimes called wood alcohol) are hard to identify and toxic if ingested. Researchers reporting in ACS Sensors have developed a prototype sensor that quickly and easily detects small amounts of methanol in breath — a step toward developing a “methanol breathalyzer” to efficiently diagnose poisonings.

To treat bacterial infections, medical professionals prescribe antibiotics. But not all active medicine gets used up by the body. Some of it ends up in wastewater, where antimicrobial-resistant bacteria can develop. Now, to make a more efficient antibiotic treatment, researchers reporting in ACS Central Science modified penicillin, so that it’s activated only by green light. In early tests, the approach precisely controlled bacterial growth and improved survival outcomes for infected insects.