Agar mucilage

Synonyms algal polysaccharides agar mucilage algin mucilage carrageenin mucilage... 

Figure 8. Higher magnification of generative hyphal walls from N-limited nutrient agar grown cultures labeled for lignin-peroxidase. Label on the hyphal tip where a thickening of the wall and mucilage form a cap at the tip. Magnification x 44,000.

Agar is obtained by freeze-drying a mucilage derived from Gelidium amansii Lamouroux, other species of the same family (Gelidiaceae), or other red algae (Rhodophyta). 

Adhesive properties are most evident in the starches, exudate gums, and dextrans, all of which make excellent sizes. The reverse property or antitack is characteristic of agars, carrageenans, gelans, and the seed-coat mucilages. 

Gelidiella acerosa (Forssk.) Feldman Hamel SCN agar (dried mucilage)... 

Occurs in agar-agar, chagual gum, red algae, flaxseed mucilage and a snail galactan. The L-galactose obt. from the hydrolysates of these polysaccharides can be freed from the enantiomer present by fermentation of the D-form. 

Preparation, The synthetic methods are the most convenient although the preparation from flaxseed mucilage and agar has been described 76). The separation of L-galactose from natural or synthetic DL-mixtures is accomplished by the fermentation of the D-galactose by galactose-adapted yeasts or by resolution of the hydrazones formed from optically active 1-amyl-l-phenylhydrazine (77). 

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