Saturable absorber: transparent glass-ceramics based on a mixture of Co:β-ZnSiO and Co:ZnO nanocrystals.

We report on the development of novel saturable absorbers for erbium lasers based on transparent glass-ceramics (GCs) containing a mixture of cobalt-doped β-willemite, Co:β-ZnSiO, and zinc oxide, Co:ZnO, nanosized (10-14 nm) crystals. The structure of the parent glass and GCs is studied by x-ray diffraction, differential scanning calorimetry, transmission electron microscopy, and Raman spectroscopy. Variations of absorption spectra with heat-treatment reveal that Co ions from the parent glass enter the crystals of ZnO and β-willemite.

[Results of testing the basic questionnaire "SINDI" in the evaluation of prophylaxis program development].

The results are considered of testing questionnaires designed to evaluate the progress in the implementation of the complex prevention programme "CINDI". The questionnaire survey was carried out in two ways--by post and by telephone. The sample size amounted to 248 people each.

[Relation between the indicators of temporary disability and risk factors of ischemic heart disease in male industrial workers (epidemiological study)].

In 1986, a random sample of 400 males was examined at one of the Moscow enterprises. A registry developed at the enterprise was used to study risk factors for coronary heart disease such as arterial hypertension, smoking, obesity, and morbidity accompanied by temporary disability in 1986. The analysis showed that the major CHD risk factors: smoking, arterial hypertension, and obesity were significantly related to temporary disability parameters.

[Experience in training subinterns in theory and practice of prevention].

2380 workers have been screened and provided with findings of their health status and recommendations with regard to identified risk factors for chronic non-communicable diseases (CNCD) and for CNCD themselves. The study of the influence of the training cycle on the attitude of students-subinterns toward preventive part of physician activity indicated the increase in the level of knowledge on prevention issues of CNCD and recognition of the necessity to include preventive measures into the activity of district physician. The experience gained in joint activities of the All-Union Research Centre for Industrial Medicine, The USSR Ministry of Health, and the Chair of out-patient medicine of the Kalinin Medical Institute suggests the need for improving the existing system of students training.