BioScience Dictionary

 
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Ot.

Found Agar 4 times.

Displaying results 1 to 10.

1. Agar
This gelatinous material, an extract from red algae (mainly Gelidium and Gracilaria species), is most frequently used as a culture medium, especially for bacteria. It is also used as a thickener in foods, but humans can't digest it.

2. Agar-gel reaction
The reaction between an antibody and an antigen during an immunology lab procedure where the two are allowed to diffuse toward each other through an agar-gel medium. Lines of precipitation form in the places on the gel where the two react with each other and shows where the reaction has occurred.

3. Agarose (agarbiose)
This linear galactan is created by purifying agar ; when it is heated and cooled, it forms a gel that is used as a support for many types of electrophoresis and immunodiffusion . A typical gel is about 1% agarose. Agarose is more porous than acrylamide and is sold in different grades; the lower its sulfate content, the more highly purified it is.

4. Agarose gel electrophoresis
A type of electrophoresis that uses a matrix of highly purified agar to separate large DNA and RNA molecules (generally around 20,000 nucleotide s in size).

View web definitions »

Learn more about Agar »