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At least 289 records · Page 16Linked to original sources
PubMed1979

[Bacteriology of the atmosphere in microclimate tents].

Micro-climate tents (pulsed filtered air) are frequently used in burns departments. In the Surgical and Traumatological Intensive Care Unit of the Department of Anaesthesia and Intensive Care of the Henri Mondor Hospital, these tents are used in two types of indications: --placing of a tent over the head end of patients following tracheotomy with free spontaneous ventilation;--placing tents over irregular wounds. In these two categories of use, the aim is to isolate the zone under the tent by protecting it against secondary infection, but also to limit to this micro-climate any possible dissemination from the injured individual placed under the tent. Comparative study of the bacterial flora of the biotopes thus enclosed by micro-climate tents has been attempted.

Air Microbiology↗
PubMed1979

[Effect of long-term work in hot microclimate on various physiological parameters in metallurgists].

The study was carried out in 20 per cent of the total number of workers repairing furnaces. Thermal load of workers exceeded the permissible values of heat stress indices (HSI, P4SR, WBGT). Body temperature and pulse rate in workers, taken at the workplaces, confirmed the high thermal load. In the laboratory there were measured: VO2 max., VC, FEV1 blood pressure (RR) and hemoglobin level (Hb). It was stated that VO2 max. in the consecutive class intervals of age decreased not because of work in heat stress but due to ageing. VO2 max. amounted, in those aged 56--60, to 68 per cent, in comparison with those aged 18--25 years. VD, FEV4 and RR were within the physiological limits. Hb level was lower in all age groups as compared to physiological values. The analysis of workers' age structure indicated that only those with high physical capacity and acclimatization abilities were able to remain in the occupation and reach pensionable age (60 years). The work in heat stress itself causes natural selection of workers. On the basis of the study it was concluded that the pensionable age for workers exposed to heat stress should be lowered.

Acclimatization↗
PubMed1979

[Microclimate parameter study in a building for the cage battery raising of small pigs].

An experiment was carried out in a reconstructed building for cell-battery rearing of young pigs, heated by two petroleum calorifers. Six to eight pigs were placed in a cell in 4 row-cell batteries at two storeys. Ventilation was realized by sucking ventilators, situated along the ridge of the building. Temperature and relative air humidity were measured at 7, 14 and 21 o'clock. The gas composition and the air movement rate were periodically investigated. It was established that at temperatures in the region below 0 degrees C regime for that category of pigs cannot be maintained with the accepted heating constructions. The gas composition standards established and the rate of air movement are within the range of hygienic standards. At the level of the second cell and crosswise to the building slighter temperature differences were observed and the temperature was higher. The conclusion is made that the chosen ventilation scheme and equipment for heating do not ensure optimal and uniform temperature-moisture regime in the premises.

Animals↗
PubMed1977

[Preliminary comparison of 2 indices of the microclimate: correct effective temperature and SWBGT (Swedish wet-bulb-globe temperature index)].

The CET and the SWBGT indices have been jointly assessed in 200 working places of 17 mechanical engineering shops and factories in Northern Italy. In the climatic conditions that have been met in the investigation (low air velocity, medium-high humidity, moderate to medium thermal stress with significant radiant heat), the indices proved to be correlated (r = 0.81) by the following regression equation: SWBGT = 0.99 CET -- 1.67, and the scattering of individual values was rather narrow. The SWBGT appears to be of more practical application than the CET and it reflects more adequately the adverse effects of low air velocities, therefore improving the adequacy of the index especially in humid environment. However, including a unique correction factor for low air velocity, it does not fit well with climatic conditions where air velocity approaches 0.5 m/s. The SWBGT requires that all four climatic parameters be determined without spending more time for the analysis than the WBGT. In different combinations of climatic conditions from those which have been met in the investigation the results may differ; however, from these preliminary observations it is suggested to further the comparison with the assessment of metabolic load and physiological response.

Climate↗
PubMed1977

A pulse-position-modulated multichannel radio telemetry system for the study of the avian nest microclimate.

A multichannel biotelemetry system using pulse position modulation has been developed to monitor continuously the environment in birds' nests. Probes to measure temperature at six points, relative humidity, light and egg attitude, together with a transmitter and power supply are contained in a fibreglass shell, having the shape, size and weight of the egg of the species being studied. The sensing egg is placed in the nest at the completion of a clutch and not removed until the young have hatched. A low-power transponder is used to relay the signals up to 2 miles to a data-logging system in the laboratoy.

Animals↗