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Some people find a change of soap powder can help, especially a move away from a biological powder.
It is not known whether Dugway has shared its skills in making biological powders with other institutions, but it has shared its supply of the Ames strain.
It was found that the performance of various makes of biological powders ranged from 58% to 81%, and non-biological powders scored from 41% to 70%.
Hanks also bemoaned the lack of realism, noting that too many costume dramas today "can't afford to remind the viewer too explicitly just how grubby and laborious life was in the days before indoor hot running water, automatic washing machines and biological powder".
A law enforcement official said the F.B.I. master anthrax data base had the names of hundreds of people linked to more than 30 traits, including factors like whether they had anthrax vaccinations, Ames access, knowledge of how to make biological powders and a history of resentment against the government.
