New Text Radioélément Treated with
Poisoning Zirconium
Significant results in the treatment o f radioélément poisoning have been announced b y Jack Schubert of Argonni» National Laboratory, Chicago. The treatment, called metal displacement therapy, utilizes zirconium to hasten the removal of plutonium and radioactive yttrium from the body. When radioactive materials enter the blood stream small amounts are excreted through normal body channels. Likewise, it has been known that plutonium and certain other radioactive materials are of the bone-seeking type and are d e posited in the skeleton of the animal within minutes after finding their \va\' into the body. Injections of significant amounts o f plutonium and yttrium were given to rats which were then divided into two groups. One group then received zirconium citrate injections. Analyses of the excreta revealed t h a t t h e administration of zirconium caused 5 0 % of the radioactive materials t o be excreted within 25 hours. Further treatments caused the elimination of additional large quantities of the radioactive materials. Rats of the control group excreted only 1% of the radioactive materials o n the first day, and decreasing amounts o n succeeding days.
Samples Si&lfur
of Organic Compounds
T h e National Bureau of Standards is now making available high-purity standard samples of organic sulfur compounds to interested laboratories of the petroleum, chemical, and allied industries. These compounds are prepared b y the Bureau of Mines under the sponsorship of the American Petroleum Institute, where they are used for the measurement of needed physical, thermodynamic, and spectral properties. A portion of each compound is s e t aside to provide standard samples for calibration of analytical instruments and apparatus in research, development, and analytical laboratories. Compounds issued were:
Instructions for ordering m a y be obtained from the National Bureau of Standards, Washington 2 5 , D . C. Directions for transferring the samples "in vacuum" are also available from t h e bureau on request.
Finned Tubinf
Studied
Fundamental data supporting the performance of finned tubing as about eight times better than plain tubing in heat exchange applications has been obtained by the Lehigh University Institute of liesearch, according t o Darrel E . Mack, director of the project. It i s hoped that the test results will lead to the use of finned tubing in applications hitherto unexploited because of the lack o f fundamental data. For rapid determinations on the heating, cooling, and refrigerating of air through the use of extended surface tubing, the institute developed a test unit which made possible simultaneously controlled conditions of temperature, air velocity, and humidity. T h e five-element unit permitted the introduction of either steam or refrigerant into the tubing under test, measured the air flow rate and air temperature, determined the amount of moisture in the air, and recorded pressure loss through the coils. Controlled flow o f refrigerant was made possible by a n adjustable Freon refrigerating unit, a n d humidity was varied by use of spray humidifiers.
Photomicrography
A. comprehensive manual on photomicrography prepared by the Carl Zeiss Co. of Germany is now available flom OTS, Department of Commerce, as FB-92781, photostat $17.50, microfilm $5.50,133 pages Make checks payable to the Treasurer of t h e U. S.). T h e general photographic and optical theory underlying the use of microscope and camera i s presented, covering image formation b y lenses, scale of projection and magnification, simple and compound microscopes, depth definition, and methods, of illumination. An illustrated appendix analyzes a sample group of scientific and industrial photomicrographs.
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Formula C4H4S C«HeS
CHEMICAL
To
MVENTORS Here is the rare opportunity that inventors have been waiting for—to show their inventions at their own exposition and get attention a n d interest from t h e public and industry. The primary pu rpose of this Exposition is to a i d inventors i n the promotion of their ideas t o public a n d industrial leaders.
First International Inventors Exposition Sponsored by the American Inventors Association The International Inventors Exposition is open to any inventor w h o has any invention — regardless of kind or application — which has merit in the opinion of the Exposition Committee. In order to make it possible for private inventors to exhibit at t h e Exposition on an equal footing with commercial entrants, the Α Ι Α (American Inventors Association) has made special arrangements f o r them t o join the Association a n d present their exhibits at a greatly reduced fee.
GRAND CENTRAL PALACE NEW YORK CITY June 4 - 1 1 , 1 9 4 9
Manual
Amount of Volume per unit**. Compound* Impurity*. Name ml. (liquid) mole % Price per unit Thiophcne 5 0.013 * 0 . 0 U $35 ft 2-Thiabutane 0.O4 * 0 . 0 4 35 (Methyl ethyl sulfide) 903-5S O.OO =fc0.04 C4H10S 3-Thiapentane (Diethyl sulfide) β The designation "-5S" following the sample number indicates a sample of 5 ml. sealed "in vacuum" in a special Pyrex glass ampoule with internal "break-off" tip. *c SeeCBEM. E N O . NBWB, 24, 2765 (1946) regarding the nomenclature of these compounds. The purity has been evaluated from measurements of freezing points, as described in J. Research Natl. Bur. Standards, 3 5 , 355 (1945) RP 1676, unless otherwise indicated.
