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Because of amylase, some of the starch in bread dough is broken into maltose, a double-ring sugar composed of two glucose molecules; but fermentation reactions require single glucose rings.

Another little innovation by the same experienced saddlers in riding bridles, an adaptation of my favourite double-ring snaffle.

Ross wore his dress uniform for the double-ring ceremony that began at 11:45 p.m.

Within the 180-mile-wide double-ring Rachmaninoff crater, Messenger photographed flat, smooth plains that scientists interpreted as the hardened outflow of lava.

The program begins near the band shell, but then audience members will be invited to join in, to dance their way through the Earthworks to the edge of the site's double-ring pond.