Clinical chemistry : an account of the analysis of blood, urine, morbid products, etc., with an explanation of some of the chemical changes that occur in the body, in disease.

Ralfe, C. H. (Charles Henry), 1842-1896.

Date:: [1883]

Credit: Clinical chemistry : an account of the analysis of blood, urine, morbid products, etc., with an explanation of some of the chemical changes that occur in the body, in disease. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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$Glycollamide. and also Q^f> HO ] H f-N. HJ Analogous to this last we Lave leucin, the neutral amide of leucic acid, which is one of the homologues of glycollic acid. Derivations of urea. —A somewhat numerous and complex class of bodies is known, the members of which contain radical, or residues of urea, together with radicals derived from various acids. Many of the deiivatives of uric acid belong to this class, as also do the important compounds kreatin and Jcreatinin. In many cases great difference of opinion exists as to the exact structure of these compounds, as they may be desci'ibed by several formulae. Kreatin is generally considered as containing residues of urea and sarcosin (methyl-glycocin). Its formula on the ammonia type may therefore be written as follows : CO C,H,0 H.,N h- h! It is capable of taking up the elements of water and splitting into urea and sarcosin. The following comparison of the formulae of these two compounds will serve to illustrate this. The atoms which have to be removed to produce kreatin are printed in italics. Sarcosin C.H.O NIT^ CH., 0\ Urea CO NH^ K//J' Compounds which contain one urea radical ai^e$