English mustard powder

Ref: 80200431b

English mustard powder. Scanning electron micrograph of a sample of english mustard powder. Mustard is a condiment made from the seeds of the mustard plants (Sinapis hirta), white or yellow mustard, (Brassica juncea) brown or Indian mustard or (Brassica nigra) black mustard.

Magnification x277 at 10cm wide.
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