Search results for “nitrogène”

The Role of Microorganisms in the Marine Nitrogen Cycle

For more Science Videos: https://lt.org/ * What happens in the marine nitrogen cycle? In this video, KATHARINA KITZINGER explains that nitrification as carried out by marine microorganisms involves two distinct processes, with ammonia oxidation resulting in nitrite which is then transformed to nitra

Ozone - protective layer and toxic gas

In the atmosphere, at an altitude of about 20 to 30 kilometers, the ozone layer protects us from carcinogenic UV rays. But on earth, on the ground, ozone is a problem. Here, the colorless and toxic gas harms people and the environment. More about ozone: http://www.umweltbundesamt.de/ozon Transla

What Is DNA | Genetics | Biology | FuseSchool

DNA (deoxyribose nucleic acid) is extremely important. All living things have DNA, or in the case of some viruses they have RNA instead. JOIN our platform at www.fuseschool.org This video is part of 'Chemistry for All' - a Chemistry Education project by our Charity Fuse Foundation - the organisati

Caves: Extreme Conditions for Life

For certain life forms on Earth, conditions that humans and other familiar organisms find hospitable can actually be deadly. Instead of a moderate climate with an atmosphere rich in nitrogen and oxygen, these organisms thrive in very hot or very cold temperatures, or in caves or deep waters where no