Copolymer helps remove pervasive PFAS toxins from environment

Researchers have demonstrated that they can attract, capture and destroy PFAS—a group of federally regulated substances found in everything from nonstick coatings to shampoo and nicknamed "the forever chemicals" due to ...

Ancient soil minerals reveal Earth's climate history

Hot and humid: Using minerals from ancient soils, ETH researchers are reconstructing the climate that prevailed on Earth some 55 million years ago. Their findings will help them to better assess how our climate might look ...

Turning streetwear into solar power plants

Researchers at Empa and ETH Zurich succeeded in developing a material that works like a luminescent solar concentrator and can even be applied to textiles. This opens up numerous possibilities for producing energy directly ...

New tool pulls elusive COVID-19 marker from human blood

When COVID-19 attacks, the immune system produces a cytokine, or protein, called Interleukin-6 (IL-6), whose concentrations can offer vital information about a patient's level and stage of infection.

Researchers find consistent mercury levels in arctic seals

Ringed seals and other Arctic marine mammals are important in the diet of Arctic Indigenous peoples. A study spanning 45 years of testing indicates that mercury concentrations in ringed seals from the Canadian Arctic have ...

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Concentration

In chemistry, concentration is defined as the abundance of a constituent divided by the total volume of a mixture. Four types can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes in homogeneous solutions.

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