The husk, the outer covering of the barley grain, is placed in a bi-fermentor which transforms the cellulose into methane gas.

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The outer covering was a windproof and water resistant shell.

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Approximately 30 percent of the cottonseed's weight is in the hull, or outer covering.

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Japanese researchers say the basalt in NWA 011 suggests the body from which it did originate had a core of molten iron with an outer covering of silicon and aluminium that formed a basaltic crust.

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