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The shapes of three low-energy resonance features in the photoionisation of neutral neon are calculated along with the total cross section in the low-energy region. The lowest singly excited resonance is in particularly good agreement with experiment. The complex amplitudes in the vicinity of the lines are plotted and discussed as an aid to understanding aspects of these resonance features. The experimental absence of the ls22s22p43s4p line, in particular, seems to be the result of the two open-channel amplitudes' fluctuating out of phase so that the sum of the resulting partial cross sections is not measurably disturbed.

Five crucian carp, Carassius auratus langsdorfiicarps had been reared in a closed water recirculating system. The system was equipped with the compact bioreactor using the plate gels capable of both nitrification and denitrification in a single unit. Ammonia and nitrite concentrations in the rearing water had been maintained below 0.05 mg-N/L, and nitrate concentration also controlled between 2 and 8 mg-N/L with the bioreactor. As concerns nitrogen budget in the closed system, 95.0 % of nitrogen income from feed was lost as nitrogen gas from the closed system. All fish was alive for 91 days without any unusual behavior. Thus, the bioreactor performed both nitrification and denitrification abilities enough to rear the five fish for 91 days. The bioreactor using the plate gels would be effective to simplify the closed system both physically and operationally, since it can remove the ammonia excreted from fish as nitrogen gas by a single step.