A growth medium or culture medium is a solid, liquid or semi-solid designed to support the growth of microorganisms or cells, or small plants like the moss Physcomitrella patens. Different types of media are used for growing different types of cells.
The two major types of growth media are those used for cell culture, which use specific cell types derived from plants or animals, and microbiological culture, which are used for growing microorganisms, such as bacteria or fungi. The most common growth media for microorganisms are nutrient broths and agar plates; specialized media are sometimes required for microorganism and cell culture growth. Some organisms, termed fastidious organisms, require specialized environments due to complex nutritional requirements. Viruses, for example, are obligate intracellular parasites and require a growth medium containing living cells.

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  1. Delasangre4231

    Medium profile barrels

    Hey guys I'm looking to build an AR-15 upper. It's primary purpose is to be suppressed most of the time. What I am looking for is a medium profile 16" barrel. I see lots of Government or M4 profile where it's pencil profile under the handguard and normal thickness to the muzzle. And then I see...
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