LACTOSE
\lˈaktə͡ʊz], \lˈaktəʊz], \l_ˈa_k_t_əʊ_z]\
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By William Dodge Lewis, Edgar Arthur Singer
By Willam Alexander Newman Dorland
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Syn.: milk sugar, galactosaccharum, saccharum lactis. C12H22O11+H2O, a compound carbohydrate (hexobiose) present in milk; also present at times in the urine of pregnant women. Upon hydrolysis with dilute acids or lactase one molecule of l. is converted into one molecule of d.-glucose and one molecule of d.-galactose. It responds to the ordinary reduction tests, which are characteristic of glucose, such as the Fehling test, Nylander's test, etc. But it will not ferment with yeast cells, a property which is made use of to distinguish it from glucose. With phenylhydrazin it forms a crystalline phenyl-lactosazone. [Lat.]
By Smith Ely Jelliffe
Word of the day
Collagen Induced Arthritis
- ARTHRITIS that is induced in experimental animals. Immunological and infectious agents can be used to develop models. These methods include injections of stimulators the immune response, such as an adjuvant (ADJUVANTS, IMMUNOLOGIC) or COLLAGEN.