How does a wing grow? A journey on the path of proteins

How organs develop and how they grow to the right size and shape are fundamental questions in developmental biology. The morphogen Dpp is a signaling molecule controlling the development of different organs with regard to ...

UN: Greenhouse gas levels hit a new record, cuts fall short

Greenhouse gas concentrations hit a new record high last year and increased at a faster rate than the annual average for the last decade despite a temporary reduction during pandemic lockdowns, the World Meteorological Organization ...

Lausanne tackles toxic soil after shock discovery

Lausanne, the capital of Olympic sport overlooking Lake Geneva, is reeling after discovering that much of its soil is polluted with toxic compounds belched out by an old incinerator.

How confined protons migrate

Protons (H+) and hydronium ions (H3O+) in free aqueous solutions seem to migrate faster than other ions due to the the Grotthuss-mechanism. Individual protons do not really migrate at all. Instead, bonds of the hydronium ...

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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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