![]() ![]() It has been designed for consumers of small and medium quantity of film. The ease of use and the problemfree maintenance make the Structurix M ECO an extremely user-friendly and reliable processor. ![]() The secret lies in the double fi xing tank, the cascade fi xing system - a unique concept in the tabletop processors range. This study is continuing to evaluate the ultimate effects of the oil application.The Structurix M ECO is the most compact processor of the Structurix ECO Film Systems, suited to applications that demand the highest image quality while being ecologically responsible. Oil applied to the soil did not migrate either to the water table or surface stream and appearance has been restored to pre-oil conditions. Soil biodegradation is an environmentally acceptable method for disposal of waste oil. On the non-oil plots Digitaria was the most common species, but Richardia scabra and Diodia teres were also present in significant quantities. Almost all of the vegetation was crabgrass (Digitaria sanguinalis) on the oil plots. Plant growth on the oil treated plots was negligible in 1975, was restricted in 1976, and productivity of a crabgrass community showed no significant difference in 1977 between oil and non-oil plots. By the summer of 1977, approximately 50% of the applied oil was lost from the soil profile through biodegradation or volatilization indicating an annual loss rate of approximately 15,000 kg/ha. Oil biodegradation was not affected by the fertilizer levels. One year after more » initial application, microbial activity was six times as great on the sites which had oil applied as on adjacent control sites without oil. ![]() Soil core samples, taken at three-month intervals, show negligible vertical migration of oil and a steady decline in oil content of the soil. Four fertilizer levels were applied and the plots were tilled for aeration at two and nine months after the oil was applied. Waste oil (21.3 1/m/sup 2/) was applied to 12 of 24 soil plots and mixed thoroughly into the top 15 cm of soil. Investigations to determine if mixing waste oil with soil could prove to be an environmentally acceptable method of oil disposal were begun in 1975 at the Savannah River Plant. Over 40 elements can be detected at the sub-ppM level. Detection sensitivities of < or = 400 ppB for natural uranium and 8 ppB (< or = 0.5 (nCi/g)) for /sup 239/Pu were demonstrated with 15-g samples at a throughput of up to 140 per day. These calculations are based on a 6 half-life group model of delayed neutron emission calculations include corrections for delayed neutron interference from /sup 17/O. Calculational procedures have been developed so that fissile material can be analyzed by cyclic neutron activation and delayed-neutron counting procedures. Photopeak areas are then converted to elemental concentration by using experimental timing and sample data, calculated elemental neutron capture rates, absolute detector efficiencies, and absolute spectroscopic decay data. Gamma more » ray data are reduced by three main programs in the IBM 360/195 computer: the 4096-channel spectrum and pertinent experimental timing, counting, and sample data are stored on magnetic tape the spectrum is then reduced to a list of significant photopeak energies, integrated areas, and their associated statistical errors and the third program assigns gamma ray photopeaks to the appropriate neutron activation product(s) by comparing photopeak energies to tabulated gamma ray energies. An automatic data control system starts and stops a high-resolution gamma-ray spectrometer and/or a delayed-neutron detector the system also stores data and controls output modes. With the totally automated pneumatic sample transfer system, cyclic irradiation-decay-count regimes can be pre-selected for up to 40 samples, and samples can be analyzed with the facility unattended. An absolute analysis technique converts counting data directly to elemental concentration without the use of classical comparative standards and flux monitors. A 100-mg /sup 252/Cf neutron activation analysis facility is used routinely at the Savannah River Laboratory for multielement analysis of many solid and liquid samples. ![]()
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