As the atrophic changes proceed in the liver, the quantity of urea and uric acid in the urine diminishes, and presently leucin and tyrosin appear.
In acute yellow atrophy of the liver, with the disappearance of the proper structure of the organs urea ceases to be produced, and instead leucin and tyrosin are excreted.
Sometimes albumen is present, and leucin and tyrosin rarely.
When cerebral symptoms, black vomit, and tarry stools appear, the area of hepatic dulness very decidedly diminishes, and leucin and tyrosin replace urea in the urine, acute atrophy may be suspected.
Under the microscope the leucin appears either in the form of concentrically sheathed globules, or as small crystalline rods and scales collected together in the form of wheels or aggregated in clusters.
The amount of urea decreases as the symptoms increase in severity, and leucin and tyrosin take its place.
Leucin and tyrosin have been found by Frerichs, but at present no observations have been made as to the frequency or import of their occurrence.
Unlike the pepsin of the gastric juice, it acts in a neutral or alkaline fluid, and not only converts the albuminous matter of the food into soluble peptones, but also, in part, into leucin and tyrosin.
Note: Unlike antipeptone it is convertible into leucin and tyrosin, by the continued action of pancreatic juice.
Defn: The chemical basis of sponge tissue, a nitrogenous, hornlike substance which on decomposition with sulphuric acid yields leucin and glycocoll.
Like keratin it resists the action of most chemical agents, and by decomposition with sulphuric acid yields leucin and tyrosin.
By decomposition with sulphuric acid it yields leucin and tyrosin, as does albumin.
Unlike antipeptone it is convertible into leucin and tyrosin, by the continued action of pancreatic juice.
The chemical basis of sponge tissue, a nitrogenous, hornlike substance which on decomposition with sulphuric acid yields leucin and glycocoll.
In this last respect it differs from the great body of proteids, the characteristic solid products of the decomposition of which are leucin and tyrosin.
As Lea justly says, this whole question of the formation of leucin by proteolysis is a very important one, since it bears closely upon one of the possible methods by which urea may be quickly formed from proteid food.
Naturally, these results help us very little in drawing any conclusions regarding the extent to which leucin and tyrosin may be formed in the intestine.
Leucin was plainly in excess, but considerable tyrosin must have been left in the alcoholic precipitate, owing to its greater insolubility in this menstruum.
As a result, quite a separation ofleucin and tyrosin occurred in the characteristic crystalline forms.
Insoluble in boiling water, and yielding by decomposition much leucin and some tyrosin, together with glycocoll and lysatin.
Thus, egg-albumin exposed to the action of boiling dilute sulphuric acid yields, among other fragments, large quantities of leucin and tyrosin, the latter belonging to the aromatic group and containing the phenyl radical.
Just here we may recall the theory advanced by Richet[107] quite a number of years ago that the acid of the gastric juice is a conjugate acid, composed of leucin and hydrochloric acid, a theory which has found little acceptance.
To obtain oxymandelic acid, the mother liquor, from which leucin and tyrosin have been extracted, is precipitated with absolute alcohol, filtered, and then the alcoholic solution evaporated to a syrup.
It may be desirable, in any case of suspected phosphorus poisoning, to examine the renal secretion for leucin and tyrosin, &c.
On now adding a little nitric acid to the sublimed leucin, and drying, and then to the dried residue adding a droplet of a solution of sodium hydrate, leucin forms an oily drop.
The filtrate is evaporated to a syrup, and it then deposits leucin mixed with some tyrosin.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "leucin" in a variety of sentences. We hope that you will now be able to make sentences using this word.
