UREAM'ETER, an instrument for measuring the amount of urea in in urine; UREAM'ETRY.
When boiled with baryta-water it decomposes into urea and ammonia.
The method used by Dragendorff to extract morphine from either urine or blood is to shake the liquid (acidified with a mineral acid) several times with amyl alcohol, which, on removal, separates urea and any bile acids.
The urea is much diminished, and, according to Schultzen and Riess,[294] may be towards death entirely absent.
The diuretic action which has been noticed in man is wanting in animals, nor has a lessened diminution of urea been confirmed.
It is a product of the decomposition of the soluble cyanates by dilute acids, or of urea by heat, &c.
As we have seen, the urea is very slightly lower; but after much exertion the uric acid is increased.
No urea escapes by the skin, but many acids (probably fatty ones) are liberated by that organ.
If we place urea in the presence of beer-yeast, it experiences no change; while if we add it to sugar-water in a fermenting state, the urea is converted into carbonate of ammonia.
Urea and uric acid are only to be found in the very best samples of guano, and their presence is a positive proof of entire soundness and superior quality.
From this mass urea was extracted by alcohol in so pure a condition as to appear in crystalline tufts upon the evaporation of the alcohol.
In the fowl, however, the blood-vessels of the allantois also probably absorb the albumen of the egg, and may excrete urea into the egg-space.
The water of the urine is probably filtered off in the capsule, the urea and other salts secreted by the tubuli.
In the capsules, water is drained from the blood; in the tubuli, urea and other salts in the urine are secreted from a branching network of vessels.
As the urine is chiefly characterized by the urea and thus by a basic principle; it thus corresponds to the bile, and consequently the kidneys directly to the liver or the lung reversed.
In urea the muscle flows or runs out of the animal, in albumen the nerve, in lime and phosphorus the bone, in gelatine the tegumentary together with the visceral system, lastly, in water the menstruum of the digestion and respiration.
The amount of ureaexcreted daily by a man is influenced by the activity of his mind, as well as by that of his body.
The seizing of theurea by the kidney cell is a vital phenomenon which we must waive for the moment.
As evidence of hepatic insufficiency the author apparently relies on the color of the stools, and for pancreatic insufficiency he cites the high urea output.
Consequently, he concludes that a high percentage ofurea indicates the absence of secretin.
The patient improved somewhat after gastro-enterostomy with removal of the gallbladder; the vomiting ceased, but the stools continued clay-colored and the high urea output still kept up.
It is usually held that a high percentage ofurea depends on two factors, ingestion of a large amount of protein and concentration of the urine.
The urea was not increased and the relation of urea to total nitrogen remained the same.
Without doubt the percentage of urea could have been reduced to “normal” by causing the patient to drink water freely.
The author gives no data as to the amount of albuminous food, the amount of urine, or whether the percentage of urea was learned by examining a single specimen or the total quantity for twenty-four hours.
A suspected fluid can be identified as urine by detecting any considerable quantity of urea in it (p.
Pathologically, ureais increased in fevers, in diabetes, and especially during resolution of pneumonia and absorption of large exudates.
Traces of urea may, however, be met with in ovarian cyst fluid, while urine from very old cases of hydronephrosis may contain little or none.
Other factors being equal, the amount ofurea indicates the activity of metabolism.
The urine always becomes alkaline upon long standing, owing to decomposition ofurea with formation of ammonia.
From the standpoint of physiology urea is the most important constituent of the urine.
Urea constitutes about one-half of all the solids, or about 30 gm.
The presence of urea can be shown by allowing a few drops of the fluid to partially evaporate upon a slide, and adding a small drop of pure colorless nitric acid or saturated solution of oxalic acid.
The plate is heated over a flame until the urea melts, and is then set aside to cool.
In that case it is necessary to add an antacid such as urea to prevent its getting yellow or opaque.
Thought, emotion, consciousness and will become products of the brain, in the same sense as bile is a product of the liver, or urea a product of the kidneys.
By cold the respiratory function is exalted, and the excretion of urea is diminished.
Physiological repose is to be sought, not by debarring the gland of the harmless and necessary solvent, but by cutting off the materials of urea and uric acid.
Quinine and urea hydrochloride is one of the new substitutes which has found much favor.
In the clinics of the School of Chiropody of New York, novocaine, quinine and urea hydrochloride, and alypin are preferred, and no single instance of toxemia has ever been experienced.
But urea is not a plant food; for ordinary plants are entirely unable to make use of it.
Urea is the form in which the nitrogen is commonly excreted from the animal body.
In calculating the available energy, correction is made for the unoxidized residue, as ureaand allied forms.
The liver, already described as an organ of digestion (page 152), assists in the work of excretion both by changing waste nitrogenous compounds into urea and by removing from the blood the wastes found in the bile.
On account of the nature of the urea and the bile, the liver is properly classed as an excretory organ; but in the formation of the glycogen it plays the part of a storage organ.
By the action of the liver cells these are converted into urea and this is turned back into the blood.
The water leaves the body chiefly as a liquid, the urea as a solid dissolved in water, and the carbon dioxide as a gas.
From the blood the urea is separated by the secreting cells of the kidneys.
Researches have shown that alcohol increases the amount of uric acid in the body and decreases the amount of urea found in the urine.
Urea Solid By the Dissolved in Removed by oxidation in the plasma.
When theurea is stationary, which is most frequently the case, it is necessary to calculate the coefficient of oxidation; that is, the relation existing between the solid matters of the urine and the urea.
In the first there is an increase above normal; in the second the volume of urea is stationary; in the third decreased, increased, or stationary.
Again, in order to recognize the exact variety of obesity, he divides his patients into three classes, each recognizable by the volume of urea excreted.
The only contribution I have made is the use of urea in the solutions.
Many salts are more soluble in a water solution of urea than in water alone, and many such mixtures are very hygroscopic.
Moreover, it seems that in the presence of urea higher concentrations of salt may be introduced into the sap stream of trees, though I do not as yet have experimental data to confirm this statement quantitatively.
If these products are fully oxidized, however, they are thrown out in the form of the more soluble urea rather than as these acids.
Spasms may be induced by various medicinal agents given in poisonous doses, or by effete materials in the circulation, such as nux vomica or its alkaloid strychnia, lead preparations, or an excess of the urea products in the circulation, etc.
The temperature throughout the disease is seldom increased, unless the disease becomes complicated with acute, inflammatory disease of the brain or respiratory organs, which often occur as a result of the urea in the circulation.
Human urine has been accurately examined by Berzelius, although his estimate of the proportion of urea is generally admitted to be above the average.
Human urine is also much richer in urea and nitrogenous constituents generally, and has a higher value than any of the others.
This is due to the conversion of urea into carbonate of ammonia; and the same change takes place, though more slowly, with uric and hippuric acids.
Cameron, Sir Charles, on assimilation of urea by plants, 46.
These experiments may be held as demonstrating the fact that at least one organic compound of nitrogen is capable of being assimilated, as urea was actually identified as being present in the plants experimented with.
Overeating of flesh is followed by excessive production of urea and uric acid products.
Some of these may be deposited in various parts of the body, while the urea is mostly excreted by the kidneys.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "urea" in a variety of sentences. We hope that you will now be able to make sentences using this word.
