In this week’s JASA Express Letters, researchers in Japan capture sound fields around musical triangles. They wanted to understand the physical properties of the triangle instrument, test assumptions about the contribution of the triangle shape, and capture clear documentation through pictures of the sound waves around the triangle. Using acousto-optic imaging to study detailed characteristics of sound vibration pattern, the team found results that suggest resonance may occur in the triangle's semi-open space.

Scientists have unveiled the magnesium-bound crystal structure of Akkermansia muciniphila sialidase Amuc_1547, a key enzyme enabling gut bacteria to degrade protective mucins. The study reveals a unique metal-binding pocket, a carbohydrate-binding domain, and an unconventional catalytic mechanism. These findings advance understanding of gut microbiota adaptation and offer potential pathways for therapies targeting metabolic diseases linked to mucin metabolism.