Preparation and De-excitation Measurements of 177mLu Using Fast Neutrons
The t 1/2=160.4 d isomer 177mLu has many attractive features related to inducing gamma-ray decay to the ground state of the t 1/2=6.4 d 177Lu. Also, as opposed to other isomers it maybe possible to produce it in quantities without the need for extravagant or costly methods. An experimental approach is outlined for both studies using fast neutron inelastic scattering and short-pulse bremsstrahlung radiation to produce the rapid release of gamma rays from this isomer. Furthermore, cross sections for production of the isomer using fast neutrons with energies between 10–500 keV will also be studied.
Objective:To separate the floccu lant-producing bacteria with a high activity from aerobic activated sludge.Method:five strains were isolated from activated sludge.After prescreening strain Bacillus F1 with high flocculating activity was obtained.Take strain F1as the object of study,determines its fermentation fluid to the kleit suspension flocculation rate.Result:The optimum carbon and nitrogen sources are soluble starch and peptone,primary pH 7.0,the best shaking speed was 120r/min.35℃,cultivated for 72h in flakes.The strain produces a strong-activity flocculants with flocculating rate of 90 % against kaolin clay suspension.