Beta-delayed proton decay of Se 65 Batchelder, J. C.; Moltz, D. M.; Ognibene, T. J. ...
Physical review. C, Nuclear physics,
5/1993, Volume:
47, Issue:
5
Journal Article
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Beta-delayed proton decay of Sr 73 Batchelder, J. C.; Moltz, D. M.; Ognibene, T. J. ...
Physical review. C, Nuclear physics,
12/1993, Volume:
48, Issue:
6
Journal Article
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A light-element radioactive ion-beam capability has been developed at the LBNL 88-Inch Cyclotron. The system is based on the coupled-cyclotrons method and utilizes short-lived species, e.g., 11C, ...14O, 13N produced by (p,n) and (p,alpha) reactions at the LBNL Biomedical Isotope Facility Cyclotron. In a first experiment, 197Au(11C,xn)208-xAt excitation functions have been measured for energies ranging from the Coulomb barrier up to 110 MeV using a beam of 11C with intensities up to (1-2)x10(8) ions/sec on target. The results of this experiment are compared to measurements of 197Au(12C, xn)209-xAt excitation functions.
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Mice were infected with Friend leukemia virus and later immunized with either Vibrio cholerae vaccine or sheep erythrocytes. The primary antibody response to the bacteria (as judged by the number of ...plaque-forming cells) was slightly enhanced by the viral infection, whereas the response to sheep erythrocytes was inhibited. The difference appeared due to sensitization of mice to antigens crossreacting with those of sheep erythrocytes; no natural immunity to V. cholerae is detectable. However, the response of mice infected with Friend leukemia virus to a secondary challenge with the cholera bacteria was markedly inhibited. Even though the number of plaque-forming cells during the primary response was not reduced, accumulation of the cells in distinct splenic foci was suppressed. These results suggest that the effect of Friend leukemia virus on immunocompetent cells is selective. The immune response appears to be susceptible to leukemia virus-induced immunosuppression only when there has been a previous stimulation of immunocytes by antigen.
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Compilation of papers presented by the JEM-EUSO Collaboration at the 37th International Cosmic Ray Conference (ICRC), held on July 12-23, 2021 (online) in Berlin, Germany.
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