I G Park | PubMed Health

PubMed2001

Observation of a (6)(LambdaLambda)He double hypernucleus.

A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from a Xi(-) hyperon nuclear capture at rest. The mass of ( 6)(LambdaLambda)He and the Lambda-Lambda interaction energy DeltaB(LambdaLambda) have been measured for the first time devoid of the ambiguities due to the possibilities of excited states. The value of DeltaB(LambdaLambda) is 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that the Lambda-Lambda interaction is weakly attractive.

Journal Article↗

PubMedDate not supplied

Neurobehavioral changes in shoe manufacturing workers.

A study was carried out to evaluate: (a) the value of a cumulative exposure estimate (CEE) calculated from limited information on air concentration; and (b) whether chronic exposure to mixed organic solvents at a shoe manufacturing factory has induced neurobehavioral changes. The Neurobehavioral Core Test Battery was administered to 40 female workers from a shoe manufacturing factory and 28 housekeepers as referents. The airborne concentrations of the solvents as a mixture were 0.46-0.71 at the frame making process and 1.83-2.39 at the adhesive process. Performance was analyzed by three exposure indices: current department, exposure duration, and CEE. The Santa Ana Dexterity test showed statistically significant differences only in CEE. In particular, the group with higher exposures had a significantly poorer performance than the reference group, on preferred hand trials. The results suggested that CEE appeared to be a better indicator of mixed organic solvents exposure, and neurobehavioral changes were associated with CEE over 10 years.

Adult↗