Search

Muscle infarction after bypass graft occlusion for atherosclerotic occlusive disease in non-diabetic patients is uncommon. The diagnosis of minor muscle necrosis not requiring surgical debridement in the presence of an acute graft occlusion is often difficult to make. The incidence of this problem in non-diabetic patients with artheroscleotic disease as well as the utility of magnetic resonance imaging in the diagnosis of minor muscle necrosis are presented below.

Two sets of optically active 5-substituted-2-(3-pyridyl)thiazolidin-4-ones, highly potent and selective antagonists of platelet activating factor (PAF), displayed apparently different anti-PAF activities between their enantiomers, wherein these activities depend markedly on the absolute configuration of the 2-position in the thiazolidin-4-ones.

1. 1. Monte Carlo Calculations by a Modified Vector Processor. At Japan Atomic Energy Research Institute, four Monte Carlo codes KENO-IV, MORSE-DD, and VIM and MCNP were vectorized to examine the adaptability of vector processors for these codes. The performances and vectorization rates of the vectorized versions were not good except KENO-IV on SX-2 vector processor, on which the vectorized version attained three times faster speed compared to its scalar version. According to the experience with the vectorization, some additional features specialized for Monte Carlo calculations will improve the vectorization rates of the four codes. Functions of the features and anticipated effects are presented. 2. 2. Speedup of Monte Carlo Criticality Calculation by a Parallel Processor. The authors implemented the Monte Carlo code KENO-IV on a parallel processor system Topology 1000 with three processing units under control of SUN workstation. The Hansen-Roach 16-group cross section set was used for the calculation. A computation for a bare sphere of highly enriched uranium metal showed that the system attained 2.7 times speedup compared to that of one processing unit.