Nevertheless, about one quarter of published genotoxicity studies found an effect of low-level exposures (Vijayalaxmi and Obe 2004; Vijayalaxmi and Prihoda 2008).
The results did not support recent findings in an observational study of an effect of low-level mercury on tubular biomarkers in children.
Based on the abstracts, we assessed whether authors interpreted their study results as showing an effect of low-level radiofrequency radiation, as showing no effect, or as indicating an unclear finding.
We feel that the weight of evidence across a number of studies has come down in support of an effect of low-level lead exposure on children's intellectual and neurobehavioral function; as stressed by Bellinger (2004), this evidence is supported by studies on experimental animals in which confounding is largely irrelevant.
Shadick NA, Kim R, Weiss S, Liang MH, Sparrow D, Hu H. Effect of low level lead exposure on hyperuricemia and gout among middle aged and elderly men: the normative aging study.
While we cannot rule out a direct effect of low levels of CEBPB within theca/interstitial cells as the primary mechanism for the observed decline in Cebpd mRNA levels, it is tempting to speculate that thecal Cebpd expression is regulated by juxtacrine/endocrine factors from the granulosa cell compartment.
Glyphosate treatments also resulted in significantly greater flower attempts on both sensitive B. napus cultivars and at both 0.05 and 0.10 treatment levels (Table 1, Figure 2), possibly indicating a stimulatory effect of low levels of glyphosate on flower production in B. napus.
The reinforcing loop R5 denotes a potential amplifying effect of low levels of vaccine acceptability over a long period of time on a household's trust in vaccination.
The study is the first to demonstrate a significant long-term effect of low levels of CuO NPs on methanogenesis.
This study also focused on a comparison of the effect of low levels at treatment targets of lipid measures on CHD risk, which was not previously presented in the FIELD, UKPDS, or Framingham studies.
In a turn around to this, the prooxidant effect of low levels of tocopherol is evident at low oxygen tension [ 185].
