Sentence examples for multiple chemicals are from inspiring English sources
When doses of multiple chemicals are received from one source (multiple chemicals co-occurring in a medium or a commercial product) they can be referred to as a mixture exposure.
In large part, the tools to address simultaneous contamination by multiple chemicals are likely lacking.
With current cultural pressures, these products are used with increasing frequency and quantity [ 8, 9], and by ever younger children including babies [ 3], and the effects of long-term low-dose exposure to these mixtures of multiple chemicals are unknown.
On the other hand, herbal remedies (known to contain multiple chemicals) are considered relatively safe and useful in such disorders, thus a single plant offers multiple therapeutic benefits [ 4].
An assessment of the effect of human exposure to particular substances can be complex because multiple chemicals are usually involved so it may be difficult to discern the specific agent responsible for a particular health concern [ 16- 19].
The salient pitfalls in converting scientific knowledge on combination effects of co-exposure to multiple chemicals are discussed and a tiered approach to mixture risk assessment is outlined for use by regulators and policy makers.
A key question in the risk assessment of exposures to multiple chemicals is whether mixture effects may occur when chemicals are combined at low doses which individually do not induce observable effects.
Although we did not isolate the individual chemicals responsible for the growth regulatory effect found with our extract and sub-fractions, it was evident that multiple chemicals were involved.
The rationale for a single-chemical approach in situations where multiple chemicals exist is partly based on the premise that chemical interactions either do not occur or are not toxicologically important at very low concentrations (e.g., below the NOAEL).
The combined effects of exposures to multiple chemicals have been the subject of discussion, research, and regulation by a number of organizations for more than 50 years.
Because of their large catalytic sites, multiple chemicals have been shown to inhibit carboxylesterases.
