Tyrosin also may occur as a sediment of little heaps of fine needles.
The two deposits are mixed together and treated with dilute ammonia, which will dissolve out any tyrosin and leave it in needles, if the ammonia is spontaneously evaporated on a watch-glass.
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.
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.
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.
The amount of urea decreases as the symptoms increase in severity, and leucin and tyrosin take its place.
Sometimes albumen is present, and leucin and tyrosin rarely.
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.
Further, we know from observations made by different investigators that both leucin and tyrosin may be formed in considerable quantities in trypsin-proteolysis as it occurs in the living intestine.
This experiment is almost a counterpart of one reported by Lea,[197] and like his indicates that both leucin and tyrosin may be formed in not inconsiderable quantities by pancreatic proteolysis as it occurs in the intestine.
As a result, quite a separation of leucin and tyrosin occurred in the characteristic crystalline forms.
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.
Further, the amount of leucin and tyrosin formed in a flask-digestion is always greater than in a dialyzer-digestion, other conditions being equal.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tyrosin" in a variety of sentences. We hope that you will now be able to make sentences using this word.
