Acumedia
BD / Difco
BD / BBL
Oxoid
Merck
Agar, Bacteriological (7178)
214530
299340
N/A
N/A
Intended Use
Agar, Bacteriological is a solidifying agent for use in preparing microbiological culture media. Agar, Bacteriological conforms with the testing specified in the USP/EP Pharmacopeia.
Product Summary and Explanation
Agar is a phycocolloid extracted from a group of red-purple algae, usually Gelidium spp. Agar was first suggested for microbiological purposes in 1881 by Fannie Hesse. By the early 1900’s, agar ... Read more
Acumedia
BD / Difco
BD / BBL
Oxoid
Merck
Agar, Bacteriological (7178)
214530
299340
N/A
N/A
Intended Use
Agar, Bacteriological is a solidifying agent for use in preparing microbiological culture media. Agar, Bacteriological conforms with the testing specified in the USP/EP Pharmacopeia.
Product Summary and Explanation
Agar is a phycocolloid extracted from a group of red-purple algae, usually Gelidium spp. Agar was first suggested for microbiological purposes in 1881 by Fannie Hesse. By the early 1900’s, agar ... Read more
Intended Use
Agar, Bacteriological is a solidifying agent for use in preparing microbiological culture media. Agar, Bacteriological conforms with the testing specified in the USP/EP Pharmacopeia.
Product Summary and Explanation
Agar is a phycocolloid extracted from a group of red-purple algae, usually Gelidium spp. Agar was first suggested for microbiological purposes in 1881 by Fannie Hesse. By the early 1900’s, agar became the gelling agent of choice over gelatin because agar remains firm at growth temperature for many pathogens and agar is generally resistant to a breakdown by bacterial enzymes. The use of agar in microbiological media significantly contributed to the advance of microbiology, paving the way to study pure cultures.
Agar is a gel at room temperature, remaining firm at temperatures as high as 65°C. Agar melts at approximately 85 - 91°C, a different temperature from solidification at 34 - 36°C. This property is known as hysteresis. Agar is generally resistant to shear forces; however, different agar may have different gel strengths or degrees of stiffness.
Specifications for Agar, Bacteriological include good clarity, controlled gelation temperature, controlled melting temperature, good diffusion characteristics, absence of toxic bacterial inhibitors, and relative absence metabolically useful minerals and compounds. Agar, Bacteriological is recommended for clinical applications, auxotrophic studies, bacterial and yeast transformation studies, and bacterial molecular genetics applications.
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