Two composite samples, with apportioned contributions from RWC and MS, were prepared from the Boise ambient samples and tested for tumor-initiation potency.
However, studies examining a single source of ambient PM10 are infrequent because of the difficulty finding a site without a mixture of various pollutants, and the complexity of apportioning contributions from different sources [ 2, 6].
This information would allow us to reliably apportion the contributions of these activities to overall THM exposure and improve the interpretation of data collected in such studies.
Thus there can be ample room for unintended or intended confusion in the exercise of trying to apportion the contribution of environment to the aetiology of cancers.
It is very difficult to apportion the contribution of single source to the total pollutant measured in each case because there are a number of other unknown sources for phthalates indoors.
Although advanced degenerative changes seemed to be more prominent in the animals with the most profound cardiotoxicity, we cannot yet apportion the contribution of each of these processes to heart failure induced by anthracyclines.
Once significant effects were identified, the total G was apportioned into contributions by the individual treatments, first using the results from controls to establish expected frequencies, and then by using the results of the individual chemicals to establish expected frequencies to test if the pesticide mixtures differed from the observed effects of the individual chemicals.
Because source composition and/or physical properties of particles vary between different source categories, the mass can be statistically apportioned into contributions from various source categories, opening the possibility of evaluating PM component effects using epidemiologic methods presently used on the PM mass.
Focusing on obtaining a detailed occupational and environmental history, establishing clear objective data to substantiate illness, and estimating or apportioning workplace contribution to the condition is important for the diagnosis and treatment of this relatively common form of asthma.
This implies that it is possible to apportion the relative contributions of each.
