Agar (/ ˈ eɪ ɡ ɑːr / or / ˈ ɑː ɡ ər /), or agar-agar, is a jelly-like substance consisting of polysaccharides obtained from the cell walls of some species of red algae, primarily from “ogonori” and “tengusa”.

2024年10月23日 · Agar is a gelatinous substance derived from red algae, primarily from species such as Gelidium and Gracilaria. It’s commonly used as a hydrocolloid in the food industry, but its role in microbiology is what truly makes it special.

2024年7月17日 · Agar is a polysaccharide substance derived from certain types of red algae. It is used mainly as a gelling agent, thickener, and stabilizer in food, pharmaceuticals and microbiological cultures. In microbiology, it is used as a solidifying agent for culture media, to grow and maintain microorganisms such as bacteria and fungi.

Agar is a phycocolloid extracted from a group of red-purple marine algae (Class Rhodophyceae) including Gelidium, Pterocladia and Gracilaria. Gelidium is the preferred source for agars. Impurities, debris, minerals and pigment are reduced to specified levels during manufacture.

2025年1月10日 · Best known as a solidifying component of bacteriological culture media, it is also used in canning meat, fish, and poultry; in cosmetics, medicines, and dentistry; as a clarifying agent in brewing and wine making; as a thickening agent in ice cream, pastries, desserts, and salad dressings; and as a wire-drawing lubricant.

2024年7月5日 · Agar media play an essential role in microbiology, providing a solid surface for the growth and differentiation of microorganisms. Their versatility and efficacy make them indispensable tools in both research and clinical settings.

2023年8月2日 · Agar, also called agar agar, is a natural gelling agent derived from seaweed (specifically algae belonging to the class of red algae). It has been used for centuries in various cultures for its thickening and stabilizing agar properties.

Agar is the most commonly used solidifying agent in microbiological media. Agar-Agar is generally used at a final concentration of 1 to 2% to solidify culture media. Smaller amounts (0.05-0.5%) are used in media for motility studies (0.5% w/v) and for growth of anaerobes (0.1%) and microaerophiles.

2024年7月10日 · Agar is a polysaccharide-based hydrocolloid synthesized in the cell walls of red seaweed, known as agarophytes. 1 Owing to its unique gel-forming ability, agar has wide-ranging applications...

This article will plunge into the depths of agar, unveiling its definition, role, and the intriguing process behind its production. It will dissect the different types of agar used in microbiology, such as Nutrient agar, MacConkey agar, and Sabouraud agar, explaining their particular uses.