The E.P.A. recommended such a limit and considered banning the nPB glues, but it has yet to finalize the plan.
Cushion makers in the 30,000-employee foam industry were among the most vulnerable of all workers using nPB because they breathed it in aerosol doses.
Sometimes, the effect is referred to as the polarization opposition effect (POE) in order to distinguish it from the NPB, though a different origin for the NPB and POE is not obvious (e.g., Shkuratov et al., 2002; Zubko et al., 2008).
Businesses found nPB appealing partly because the E.P.A. had given it an endorsement of sorts by adding it to a list of chemicals that do not harm the ozone layer.
Medical researchers, government officials and even chemical companies that once manufactured nPB have warned for over a decade that it causes neurological damage and infertility when inhaled at low levels over long periods, but its use has grown 15-fold in the past six years.
And it never set a standard limiting exposures to nPB, despite longstanding scientific warnings.
Federal officials found that it had exposed workers to dangerous levels of nPB at least a dozen times, more often than any other company.
It is therefore likely that higher levels of NPB and MN observed in Rad21+/− cells are a consequence of the impaired DSB repair in combination with failure in cell cycle arrest following IR.
With both TC and HV considered, it can be pointed out that a structure of NPB with a porosity of 0.25 is preferable as a thermoelectric material because of the low TC and the higher hardness.
With both TC and HV considered, it can be pointed out that a structure of NPB with a porosity of 0.25 is preferable as a thermoelectric material in this paper, because of the low TC and high hardness.
