EPA, however, added statutory criteria to the scientific considerations by necessity: "EPA plans to use three main categories of information to set priorities: exposure-related information, effects-related information, and statutory criteria" [ 15].
This is what "aperture priority" exposure control is about.
Among the virtually infinite number of possible coincidental mixtures (see Supplemental Material, Appendix 1, Table 1-3; http://www.ehponline.org/docs/2007/9333/suppl.pdf) that occur in the real world, there are three obvious examples of high-priority exposures.
This challenge would be best addressed by an internationally coordinated effort where the development of methods aimed towards a set of "priority exposures", are addressed in an integrated way.
Twenty-seven additional high-exposure mammary gland carcinogens do not fall into the 17 priority categories described above but are still priorities for exposure and epidemiological studies (see Supplemental Material, Table S1).
Objective: We sought to identify research priorities for exposure assessment that will more accurately and precisely define exposure response relationships of household air pollution necessary to inform future cleaner-burning cookstove dissemination programs.
Among the top 10 research priorities cited, exposure of susceptible subpopulations and the increased risk for adverse health effects to these sub-populations are identified as warranting significant resource backing (NRC 1998, 1999, 2001, 2004).
The highest-priority urinary exposure biomarkers identified by the BCERC consortium are phytoestrogens, phthalate acids, and phenols.
Department of Health and Human Services 2000), and environmental public health indicator efforts (CSTE 2004; U.S. EPA 2003) will assist in identifying the core priority health, exposure and hazard data for the national EPHT network.
Cameras with aperture-priority automatic exposure (like the Canon AV-1) will allow you to set an aperture, and then choose a shutter speed for you.
Cameras with shutter-priority automatic exposure, which is not necessarily a distinct class of camera from the above, will allow you to choose a shutter speed and then it will set an aperture automatically.
