Century Dictionary and Cyclopedia
- n. A gummy substance, C6H10O5 (γ-galactan), allied to manna, which is extracted from the seeds of legumes and is formed to a small extent during certain fermentations. It is oxidized to mucic acid by means of nitric acid and yields galactose on hydrolysis.
“The best known of these is agar, a sulphated galactan which is extensively used in microbiological and public health laboratories, as a culture medium for bacteria and fungi.”
“This is also a sulphated galactan, extracted from red seaweeds such as Chondrus,”
“Schultze and Maxwell state that raw coffee contains galactan, mannan, and pentosans, the latter present to the extent of 5 percent in raw and 3 percent in roasted coffee.”
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