We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
UNDERSTANDING THE ATOM SERIES 77 the order of increasing complexity as follows: (1) self -diffusion of solid copper; (2) study of vapor pressure over metallic silver; (3) ex- change of chloride ions in solid and liquid; (4) exchange of sodium and potassium through cell wall; (5) rearrangement of atoms within a molecule, Wolff rearrangement of a diazoketone; (6) metabolism of cholesterol from sodium acetate in liver; (7) fate of carbon atoms during metabolism of glycine in blood; and (8) tracing the chemical path of carbon during photosynthesis in algae. Methodology of tracer research is illustrated, and techniques such as isotope dilution and two-dimensional paper chromatography are introduced. THE RADIOISQTOPE: METHODOLOGY (PMF-5145-D). 33 minutes. Sale price: $43.03. For loan source see Army Field Library Listing, page 74. This film contains a historical sequence showing the early work of Hevesy in studying plant metabolism with naturally occurring radio- lead, after which it explains seven criteria for setting up a tracer ex- periment: (1) radiochemical purity, (2) single chemical state, (3) elimi- nation of exchange error, (4) knowledge of the degree to which the labeled molecules remain intact, (5) avoidance of isotope effect, (6) avoidance of chemical effects, and (7) avoidance of radiation ef- fects. The film also illustrates the relative importance of economy of time and materials and accuracy by depicting a typical biological tracer experiment from the formation of an idea to the final results. RADIOISOTOPES IN AGRICULTURAL RESEARCH (PMF-5147-B). 41 minutes. Sale price: $53.41. For loan source see Army Field Library Listing, page 74. This film explains the following three classes of work: (1) use of 32 P in large-scale field tests of fertilizers; (2) use of 60 Co in micronutrient studies with large domestic animals (a related study concerning the incorporation of inorganic cobalt into vitamin B 12 is included); and (3) use of 45 Ca in macronutrient problems. The film also discusses other ways in which radioisotopes are used in agricultural research. Health safety procedures and techniques unique to large-scale field and animal research are stressed. UNDERSTANDING THE ATOM SERIES This semitechnical lecture-film series is designed for inclusion in a high-school senior-level chemistry or phys- ics course, or it could be used as an introductional unit in nuclear science at the college level. The lecture - demonstrations are presented by Dr. Ralph T. Overman, Chairman, Special Training Division of the USAEC's Oak Ridge Institute of Nuclear Studies.