Word: barium
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...with a match, the paper particles first heated set others on fire; these in turn ignite others, and so on. The same sort of chain reaction must be started for a successful large-scale atomic explosion. Above, the rare form of uranium, U-235, is shown breaking down into barium and krypton (only one of several possible disintegrations). The "match" is a neutron source at left. (Radium mixed with beryllium is a common source of neutrons...
Your medical editor passed quite a "boner" in your marvelous tale from Brazil (TIME, Feb. 5) in which it is stated that "X rays proved that Spiritualist Bernardi's appendix had actually been removed [during a seance in a dark room]." Every medical man knows that the barium shadow of the appendix when in situ [in the body] is rarely seen. . . . The absence of such a shadow cannot possibly prove that the appendix is missing...
...correct answer was given to the question throughout the day. . . . When relating this experience to a member of the staff.* The barium shadow of the appendix can be seen often, not "rarely." But Dr. Singley's main point still holds: as proof of the absence of the appendix the X-ray test is unreliable. of Columbia University Library, she sadly bemoaned the ignorance of the average person of facts pertaining to our country. I broke in with, "Can you tell me the location of the State of Kansas?" She could not! . . . The Little Red Schoolhouse had its points...
...crystalline structure of luminescent pigments, but one way that they can be dispersed, crudely ground, through oil or varnish to form paints is with the help of wetting agents (TIME, Jan. 5). Many of the phosphorescent pigments now manufactured in the U.S. are sulfides, chiefly of strontium, zinc, barium, calcium, cadmium, etc.; and a large group have formulas that are military secrets. The fluorescent pigments are chiefly beryllium and zinc silicates, cadmium borates, calcium and magnesium tungstates, and organic dyes...
...physicist) and R. Frisch of Copenhagen, who presented a fine interpretation of what happened when the uranium atom cracked. Some credit also went to Nobel Laureate Irene Curie-Joliot (daughter of Marie Curie) and P. Savitch of Paris, who had done work which helped Hahn identify the all-important barium in his bombardment products...