What organisms are responsible for nitrogen fixation?
Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants.
How is nitrogen produced?
Commercial production of nitrogen is largely by fractional distillation of liquefied air. Nitrogen can also be produced on a large scale by burning carbon or hydrocarbons in air and separating the resulting carbon dioxide and water from the residual nitrogen.
How is nitrogen used in everyday life?
Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. Nitrogen gas is also used to provide an unreactive atmosphere. It is used in this way to preserve foods, and in the electronics industry during the production of transistors and diodes.
What is colder than liquid nitrogen?
Yes, there are things colder than liquid nitrogen, like most of the Universe! I assume, though, that you mean things on the Earth….Questions and Answers.
| Fluid | Boiling temperature Celsius | Boiling temperature Fahrenheit |
|---|---|---|
| Neon | -246° | -411° |
| Hydrogen | -253° | -423° |
| Helium | -270° | -452° |
What’s the hottest substance on earth?
Laser experiments shedding light on ultradense plasma. By zapping a piece of aluminum with the world’s most powerful x-ray laser, physicists have heated matter to 3.6 million degrees Fahrenheit (2 million degrees Celsius)—making it briefly the hottest thing on Earth.
What is the coldest thing we can create?
This is the point when all motion of atoms that make up an object stop moving—a chilling 0 Kelvin or -459.67 Fahrenheit. Researchers have tried for decades to reach absolute zero, which is thought to be impossible to ever attain.
What are the coldest elements?
Liquid hydrogen is the coldest substance known to man, minus 400 degrees. ALSO: A Bose–Einstein condensate (BEC) is a state of matter of bosons confined in an external potential and cooled to temperatures very near to absolute zero (0 K, ? 273.15 °C, or ? 459 °F ).