Chiral properties of cellulose, wood fibres and paper

Cellulose shows chiral structures at many levels, from the chirality inherent in each sugar unit to chiral interactions between nanocrystals, chiral twisting of microfibrils, and of helical organization of microfibrils in plant cell walls. Macroscopic chiral material properties are even observable in paper and wood. If strips of ordinary newsprint are wetted and redried, they twist in a chiral manner. Some newspapers twist into right-handed helical strips, and some into left-handed.

In  Montreal, the Gazette twists to the right, the Journal de Montreal twists to the left.

In Montreal, the Gazette twists to the right, the Journal de Montreal twists to the left.

Which way would you expect this newspaper to  twist? Right or left?

Which way would you expect this newspaper to twist? Right or left?


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