Outline of physiological chemistry, including the qualitative and quantitative analysis of the tissues fluids and excretory products / by Charles Henry Ralfe.

  • Charles Henry Ralfe
Date:
1873
Catalogue details

Licence: Public Domain Mark

Credit: Outline of physiological chemistry, including the qualitative and quantitative analysis of the tissues fluids and excretory products / by Charles Henry Ralfe. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    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 deriva- tives of uric acid belong to this class, as also do the important compounds kreatin and kreatinin. In many cases great difference of opinion exists as to the exact structure of these compounds as they may be described by several formulae. Krea- tin is generally considered as containing residues of urea and sarcosin, (methyl-glycocin). Its for- mula on the ammonia type may therefore be written as follows. C0\ C.H.O N, = C,H,N30.. hJ It is capable of taking up the elements of water and splitting into urea and sarcosin. The follow- ing comparison of the formulas of these two com- pounds will serve to illustrate this. The atoms which have to be removed to produce kreatin are printed in italics. Sarcosin C,H,0 NH, CH3 0 \ Urea CO NK, N ^3 J * Compounds which contain one urea radical are called monureides. Kreatin is a monureide and so are ^amto/and a/W. which are obtained by the oxidation of uric acid.
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