A conventional plasma focus device was used to produce a hot, dense plasma which emits radiation strongly in the soft x-ray region. We showed experimentally that a plasma produced from a mixture of hydrogen and a rare gas such as neon, argon, or krypton is an effective source of a characteristic x ray of the rare gas. Resist exposures and pattern printings were made to evaluate the feasibility of this device as a source for soft x-ray lithography.

Abstract— Dopamine‐β‐hydroxylase (DBH) activity in serum was decreased significantly in schizophrenic patients (16.17 ± 12.60 μmol/min/1 of serum, mean ± S.D., n = 149) when compared with that of normal controls (42.53 ± 30.94 μmol/min/1 of serum, mean ± S.D., n= 153) and neurotic patients. Long duration of disease did not cause any significant changes in serum DBH activity except a tendency for increase in patients of lodger than 18 years duration. We also examined the possibility that the serum DBH deficiency in the schizophrenic group was an artifact of treatment with antipsychotic drugs, especially phenothiazines. No significant difference was observed between the patients treated with the drugs and the patients not receiving the drugs.

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