Selenium has been referred to as an "essential toxin" due to the fact that it shows only a marginal line between the nutritious requirement and toxic effects upon exposure. The steep dose response ...

Selenium is an essential trace element necessary for many biological functions, yet its elevated concentrations pose a significant toxicological risk. In water treatment and environmental remediation, ...

Stay on top of what’s happening in the Bay Area with essential Bay Area news stories, sent to your inbox every weekday. Hyphenación Where conversation and cultura meet. Meredith’s Must-Sees See Senior ...