Word: urea
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...Manhattan, and Drs. Donald Young Solandt and Charles Herbert Best of Toronto, in The Lancet, British medical journal. They reported removing the kidneys from a dog, thus preventing him from excreting the nitrogenous poisons carried in his blood stream. Several days later, when his blood was filled with urea, they anesthetized him, connected an artery and vein to a vein and artery of a healthy, anesthetized dog. The small connecting pipes were attached to a specially designed pump which exchanged more than six quarts of blood an hour in each direction. A solution of heparin (a phosphorus compound found...
Approach to Cortin. Dr. Harold Lawrence Mason and his associates at the Mayo Clinic in Minnesota are trying to isolate, determine the chemical structure of, and eventually synthesize the potent hormone cortin, secreted by the suprarenal glands. Cortin maintains the potassium, sodium and urea balance of the blood; without it man develops Addison's disease and dies. Last week the Mayo researchers announced isolation of a pure crystalline substance which seems to be a close cousin of cortin. The crystal molecule contains 21 atoms of carbon, 28 of hydrogen, five of oxygen. It seems to have the same effect...
...between living and nonliving things was so narrow as to be almost nonexistent. A century ago the demarcation between organic and inorganic matter was sharp. It grew hazy when chemists began to make com pounds artificially. They found that hydrocyanic acid, simply standing in water, gives rise to urea and other substances found in living tissues. Now that thousands of organic compounds have been synthesized, it is chemical custom to call "organic" any compound, however formed, that contains carbon, since carbon is a notable component of plants and animals. Lately Rockefeller Institute researchers have isolated in the form of crystals...
Plastics. Carleton Ellis, Montclair, N. J. research chemist, surveyed modern developments in synthetic resins. Best known ones are those made from phenol and formaldehyde (Bakelite, Durez), urea and formaldehyde (Unyte, Plaskon, Beetle), glycerol and phthalic anhydride (Glyptal, Rezyl), and vinyl compounds (Vinylite). Other trade names: Tornesite, Thiokol, Plioform, Victron. With Bakelite starting the grand march they have been widely used in small molded shapes. Late developments make it possible to mold large objects (chair backs and legs, table tops, radio cabinets) from plastics. Tanks nine feet in diameter have been molded from Haveg, a phenol-aldehyde. Textiles can be impregnated...
Stomach Cancer. Ammonia, uric acid, urea and aminoacid have recently been discovered in stomach juices. Certainly an increase of those substances is associated with cancer, and perhaps with other diseases. Dr. Lay Martin of Johns Hopkins is trying to find out, hoping that the proportions of those substances in gastric juices may help early diagnosis of stomach cancer. For some undetermined reasons cancer of the digestive tract has become more frequent recently, observed Dr. Thomas Richardson Brown of Baltimore...