Word: atomization
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Overgrown Atoms. Headliner of the convention was a round-faced, gum-chewing professor of Columbia University, Harold Clayton Urey, who won a Nobel Prize in 1934 for his spectrographic identification of deuterium, the doubleweight hydrogen atom which in combination with oxygen makes heavy water...
Heavyweight Detectives. Deuterium occurs in nature to the extent of one atom among 4,500 atoms of ordinary hydrogen. With modern apparatus if deuterium is present in quantities much greater than this proportion it can be detected. Thus if a man weighing 160 lb. drinks 20 drops of heavy water, the excess of deuterium will show in his urine. Biologists have been quick to see that, with two kinds of hydrogen atoms as distinct as red and green, a neat method was available for tracing the course of hydrogen-bearing compounds in body processes. Scientists in Germany have already found...
Some molecules are so small that they contain only one atom. Some are so large that they contain hundreds, thousands, possibly millions of atoms. Although they cannot be seen under the microscope, the giant, complex molecules of proteins are among the most important targets of current research in biological chemistry. Until recent years not much was known about them except that they were very big; that they contained carbon, hydrogen. oxygen, nitrogen and sometimes sulphur and phosphorus; that in such animal processes as digestion they were broken down by protein-wreckers called enzymes and that they were composed of polypeptide...
...figures for the façade of the British Medical Association's new building in the Strand. For his theme he chose The Birth of Energy and his uncompromising, starkly modeled figures represented such ideas as Primal Energy (a nude man blowing the breath of life into an atom), The Brain (a figure holding a winged skull), Manliness (a figure whose physical attributes were very obvious). Preachers and conservative editors roared denunciation...
...which causes tobacco mosaic disease. Crystallization is a property of nonliving matter but when the virus was applied to the leaf it promptly acquired the ability to reproduce itself-a characteristic of life. The virus is a giant molecule weighing 17,000,000 times as much as a hydrogen atom. Dr. Stanley found the molecule to be spherical, with a diameter of .0000002 cm. When Dr. Langmuir made a monofilm of the virus and then transferred the film to a glass plate where its thickness could be measured, he found that the molecule had flattened out like a pancake...