PER

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10,159 published items.

Structure and working principle of oxygen generator
Scientific application

Structure and working principle of oxygen generator

In the medical device field, an oxygen concentrator is a device with the function of enriching oxygen from the air (concentrating and increasing oxygen concentration) wi…

November 5, 2021
The 'time bomb' beneath the permafrost
Environment

The 'time bomb' beneath the permafrost

Permafrost melting due to global warming brings with it many threats such as the release of greenhouse gases, fractured infrastructure and changing landscapes.

November 5, 2021
Marvel at the pink river in Peru
Environment

Marvel at the pink river in Peru

In Cusco, Peru, there is an amazingly pink and red river. In particular, this watercolor is only available in the rainy season.

November 5, 2021
Permafrost seed bank
Scientific works

Permafrost seed bank

Russia is testing a seed storage facility that relies entirely on natural cold conditions to save electricity in Yakutia.

November 5, 2021