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Biomedical subjects

G Marcaletti

Publications and source records attributed to G Marcaletti.

23 records · Page 2Linked to original sources
PubMedDate not supplied

[Importance of the relative humidity values in determining thermohygrometric comfort].

A condition of discomfort with specific symptoms, such as throat dryness, eye irritation, in a group of workers of a small, air conditioned, working department, is described. Neither the measurements of the possible environmental pollutants concentrations, nor the assessment of the usually adopted comfort indexes (PMV-PPD) justified the worker's symptoms. They completely disappeared by means of appropriate environmental improvements aiming to increase the relative humidity values from 29% to 50-55% (drop of the amount of the hygroscopic material stored, setting up of an humidifier). The effects of the low humidity values on the hygrometric and thermal comfort are finally discussed.

Air Pollutants, Occupational↗
PubMedDate not supplied

[Monitoring of occupational activities under the risk of heat stress: use of mathematical models in the prediction of physiological parameters].

Some authors proposed mathematical models that, starting from standardized conditions of environmental microclimate parameters, thermal impedance of the clothing, and energetic expenditure allowed the forecast of the body temperature and heart rate variations in respect to the basal values in subjects standing in the same environment. In the present work we verify the usefulness of these models applied to the working tasks characterized by standardized job made under unfavourable thermal conditions. In subject working in an electric power station the values of the body temperature and heart rate are registered and compared with the values obtained by the application of the studied models. The results are discussed in view of the practical use.

Body Temperature↗
PubMedDate not supplied

[Reference values of chromium urine in the population residing in Lombardy].

The accurate determination of Cr in normal human urine still presents a considerable challenge, connected to its very low content, supposedly about 1 ppb. The analytical data obtaining from many Authors varying between 0.3 microgram/day and 150 micrograms/day. The question now arises which data picture the true Cr content of normal human urine. To this purpose we have determined the content of total urinary chromium in 310 healthy individuals (170 male, 140 female) resident in Lombardy (Italy). A mean urinary Cr concentration of 0.59 +/- 0.26 ppb was obtained. The levels of urinary chromium tended to be higher in males than in females and to decrease with age.

Adolescent↗
PubMedDate not supplied

[Simplification of periodic audiometric tests in persons exposed to industrial noise. An operative proposal].

Today the pure tonal audiometric test is the most used in periodical screening of the "hypoacusis" hazard in exposed patients because of its easy performance. The high number of patients to be tested and the screening frequency suggested to simplify the annual checks by testing only some of the frequency to be tested is made on the basis of the first complete audiogram performed according to a scheduled scheme. Available screening data and testing on the field show that a consistent reduction in testing time is possible and that the complete exam is reliable.

Audiometry↗