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The past few years have seen a spate of allegations of fraud in science, with the result that the integrity of the research enterprise has been questioned.
Some of the physical assumptions which are implicit in the proposed new definition of the metre are discussed, including the mass of the photon and the constancy of the fine structure constant.
This week's range of products includes items being exhibited at the meeting of the American Society of Biological Chemists which will be held in San Francisco from 5 to 9 June
