Danny Zuko made a surprise return, and he was rockin’ and rollin’. John Travolta was dressed in full Grease gear to surprise an unsuspecting audience at a Grease sing-along. On Instagram, the actor ...

John Travolta made a surprise appearance at Friday night’s “ Grease ” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko.

This study demonstrates a shear-assisted production of monodisperse droplets with tunable sizes using slit-based step emulsification (SE) devices. A single-nozzle device (17 μm in height (h), 133 μm ...

Magnetially controlled device can combine or split microlitre-sized droplets.