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IAEA looks at nuclear techniques for crop resilience
The International Atomic Energy Agency has launched a five-year coordinated research project (CRP) to strengthen plant health preparedness using nuclear and related technologies.
Wheat blast, potato late blight, potato bacterial wilt, and cassava witches broom disease can spread quickly across large areas of land, leading to severe yield losses in key crops for food security. Global trade and climate change have increased the likelihood of rapid, transboundary spread.
Toshio Funada, Isao Nihei, Shunichi Yuhara, Takashi Nakasuji
Nuclear Technology | Volume 45 | Number 2 | September 1979 | Pages 158-165
Technical Paper | Material | doi.org/10.13182/NT79-A32306
Articles are hosted by Taylor and Francis Online.
A technique has been developed to measure the hydrogen level in liquid sodium using an inert gas carrier method. Hydrogen was extracted into an inert gas from sodium through a thin nickel membrane in the form of a helically wound tube. The amount of hydrogen in the inert gas was analyzed by gas chromatography. The present method is unique in that it can be used over the wide range of sodium temperatures (150 to 700°C) and has no problems associated with vacuum systems. The partial pressure of hydrogen in sodium was determined as a function of cold-trap tempera-ture (Tc) as log PH2(500°C) (Torr) = 8.796 − 4795/Tc (K) .Sieverts’ constant (Ks) was determined as a function of sodium temperature (T) as log Ks (ppm·Torr−1/2) = 0.171 + 198.1/T (K) .From Sieverts’ constant, the solubility of hydrogen in sodium is calculated as log CH (ppm) = 4.825 − 2398/Tc (K) .It was found that other impurities in sodium, such as (O) and (OH), have little effect on the hydrogen pressure in the sodium loop.
