Performance of the first prototype of the CALICE scintillator strip electromagnetic calorimeter

A first prototype of a scintillator strip-based electromagnetic calorimeter was built, consisting of 26 layers of tungsten absorber plates interleaved with planes of 45x10x3 mm3 plastic scintillator strips. Data were collected using a positron test beam at DESY with momenta between 1 and 6 GeV/c. The prototype's performance is presented in terms of the linearity and resolution of the energy measurement. These results represent an important milestone in the development of highly granular calorimeters using scintillator strip technology. This technology is being developed for a future linear collider experiment, aiming at the precise measurement of jet energies using particle flow techniques

The degradation of semisynthetic tritiated insulin by perfused mouse livers.

Semisynthetic [3H]insulin was stored under various conditions for up to 180 days and the stability of the insulin under these conditions was assessed. A sample that had been stored for 180 days was repurified and shown to be degraded at the same rate as native insulin by perfused mouse livers, even at low physiological concentrations. After perfusion, intact insulin could be separated from degradation products, and the radioactivity associated with the insulin fraction could be used to determine the percentage degradation. The initial rate of degradation of insulin was a linear function of concentration over the range 360pM-1.9nM