Peek-a-bubble.Engineers have made a gas bubble with a hole in it. Tiny beads surround a sesame-seed-size ring of air that holds its shape in air-saturated water for at least 2 weeks, says Anand Bala Subramaniam of Harvard University Harvard University, mainly at Cambridge, Mass., including Harvard College, the oldest American college. Harvard College Harvard College, originally for men, was founded in 1636 with a grant from the General Court of the Massachusetts Bay Colony. . Hundreds of ceramic This article is about ceramic materials. For the fine art, see Ceramic art. The word ceramic is derived from the Greek word κεραμικός (keramikos). zirconia beads at the gas-water boundary lock in the shape. To make bead-coated spherical spher·i·cal adj. Having the shape of or approximating a sphere; globular. bubbles or liquid droplets, the team first injected in·ject·ed adj. 1. Of or relating to a substance introduced into the body. 2. Of or relating to a blood vessel that is visibly distended with blood. injected 1. introduced by injection. 2. congested. gas or liquid into a thin stream of particle-laden water. Squeezing those creations generated toroids, sausages, and other shapes. Each nonspherical form remains stable because its beads, jammed together by surface tension, act as a stiff shell, Subramaniam explains. Some biological structures may retain nonspherical shapes because of similar jamming of membrane components, the team suggests in the Dec. 15 Nature. |
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