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Description
Agar is a phycocolloid, water soluble polysaccharide, extracted from a group of red-purple marine algae (Class Rhodophyceae) including Gelidium and Gracilaria. Agar is normally used in final concentration of 1-2% for solidification of culture media. Agar are routinely used as a solidifying agent because of several facts like, good transparency to allow identification of colony type, consistent gelling (32C-40C) and melting (approximately 85C) temperatures, free from toxic substances that inhibits bacterial growth etc.







