RESUMO
At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a (9)Be target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at 0° forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. Coincidentally, negatively charged decay pions were detected by two independent high-resolution spectrometers. About 10(3) pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at pπ≈133 MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen Λ(4)Hâ(4)He+π(-), stopped inside the target. Its Λ binding energy was determined to be BΛ=2.12±0.01 (stat)±0.09 (syst)MeV with respect to the (3)H+Λ mass.
RESUMO
The study population consisted of 100 children with nocturnal enuresis (NE) aged between six and 14 years, who had been randomly selected amongst the enuretic outpatients at the Ankara S.S.K. Children's Hospital. A placebo-controlled evaluation of piracetam, diphenylhydantoin and psychotherapy was carried out. At the end of the eighth week of the study, it was discovered that the therapeutic effects observed in the patients administered piracetam did not differ from those given the placebo. Therefore, we recommend that psychotherapy in association with a placebo be the first step in the treatment of NE children.
