Accession Number : AD0623420

Title :   NEW METHODS FOR EFFECTING WATERTIGHT SEALS ON CORN ROOTS,

Corporate Author : NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s) : Evans,E. C. ,III ; Vaughan,B. E.

Report Date : 14 SEP 1965

Pagination or Media Count : 14

Abstract : Two effective methods of sealing corn roots into capillary glassware are described. One involves only a slight pressure on the root but cannot withstand hydrostatic pressures across the seal in excess of 15 cm of water. The second, capable of withstanding 2 meters of hydrostatic pressure, requires a melted sealing compound which can raise the root epidermis to temperatures between 50 and 56 C for about 2 seconds. Experiments using radioactive tracers have demonstrated that both seals effectively prevent ionic movement external to theroot proper and that the heat-sealing process does not alter the root's absorption-transport capacity. (Author)

Descriptors :   (*CORN, SEALS(STOPPERS), SEALING COMPOUNDS, CAPILLARY TUBES, TRACER STUDIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE