Average concentrations of gold in the leaves are much higher than normal, but individual particles of the metal are still very small, few, and far between. (sciencemag.org)
The reductions in emissions could be seen in the frequency and maximum concentrations of the short - term episodic events of emissions, and the annual average concentrations. (sciencedaily.com)
The figure below shows that, of the men with a high or average concentration of all those hormones in their blood, about 90 percent were still alive after 6 years. (ergo-log.com)