| hydrogen sulfide |
A chemical that is toxic to most animals, but used by some bacteria to make food in a process known as chemosynthesis.
출처: www.dfo-mpo.gc.ca/canwaters-eauxcan/bbb-lgb/librar...
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| hydrogen |
One of the nine macronutrients. Hydrogen is a major component of organic molecules, which are the building blocks of all organisms. Water, the chemical formula for which is H2O, supplies both hydrogen and oxygen to the plant. Unless a plant experiences drought, it will not suffer hydrogen deficiency.
출처: www.earthandtable.com/glossary/plants/essentialele...
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| hydrogen sulfide |
A molecule composed of a hydrogen and sulfur atom. It is a toxic compound which has a rotten egg odor. It is synthesized anaerobically by unwanted bacteria.
출처: www.aqualink.com/basic/zglossa.html
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| hydrogen |
The simplest element. Atomic Number 1. Hydrogen gas has a specific gravity of 0.0694 (air = 1), so it is much lighter than air. Hydrogen is highly flammable, forming water upon combustion. Explosive limits are 4% to 75%.
출처: www.fire.org.uk/glossary.htm
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| hydrogen |
An inert gas, and lightest of all the elements, has been used in experimental diving situations.
출처: www.empirescuba.com/Information/Divers_Glossary/di...
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