Performance Evaluation of a Time-Gated Fluorescence Spectroscopy Measurement System for the Classification and Recycling of Plastics.

Plastics have many unrivaled properties and are thus indispensable materials with an ever-increasing production. Since the plastics recycling rates are still small, the plastic waste that ends up on landfills, in the environment including oceans, and incineration plants also steadily grows. Large-scale automated sorting of waste plastics may help solve the problem.

Optimized Time-Gated Fluorescence Spectroscopy for the Classification and Recycling of Fluorescently Labeled Plastics.

For the production of high-quality parts from recycled plastics, a very high purity of the plastic waste to be recycled is mandatory. The incorporation of fluorescent tracers ("markers") into plastics during the manufacturing process helps overcome typical problems of non-tracer based optical classification methods. Despite the unique emission spectra of fluorescent markers, the classification becomes difficult when the host plastics exhibit (strong) autofluorescence that spectrally overlaps the marker fluorescence.

[State of occupational morbidity in Ulianovsk region (results of 20-year work of Regional Occupational pathology center)].

Analysis of occupational morbidity changes in Ulianovsk region over recent 20 years demonstrated that occupational center foundation in the region played a positive role in diagnosis and treatment, occupational fitness examinations for patients with occupational diseases.