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At least 505 records · Page 28Linked to original sources
PubMed1977

[Effect of acoustic microclimate prevailing in shipyards on the health of workers].

Yearly measurements of external noise (Noise--Pollution--Level) in the shipyard in Stettin, indicated noise levels above 85 dBA, expressed in LqM. On the ground of documentation of periodic medical examinations of the staff, one compared the rate of occurrence of disturbances in health state, such as: hearing impairment, gastric and duodenal peptic ulcer, hypertension and psychic disturbances in two groups of employees: "A"--exposed during work to noise 85 dBA and "B"--employed at the area of LqM smaller by 20 dBA. Statistically significant differences in the rates of occurrence of disturbances in the health state were found, to the disadvantage of those exposed to noise effect. In these groups also the rate of sickness absenteeism was disadvantageous: in the last 14 years its average values for the shipyard surpassed the average rate for Stettin district and the whole country.

Hearing Disorders↗
PubMed1981

[Relations of certain indicators of ejaculate quality of breeding boars to seasonal changes in the microclimate in pigsties].

A yearlong evaluation of the semen volume, concentration and number of morphologically abnormal sperms of 1722 ejaculates from 53 boars of Large White, Duroc and Landrace breeds housed in one building was performed. Simultaneously, continuous registration of temperature and of the relative humidity of the sty climate was performed, and the cooling value and the air flow in the sty were determined. In the followed period also the conception rate of sows after the first insemination by semen of the studied set of boars was evaluated. In summer season, at the increased and high temperatures and the relative sty humidity and at the lower air flow, the lowest average volume of ejaculate, the highest average sperm concentration and the minimum average number of abnormal sperms were recorded. In winter season, from the microclimatic viewpoint characterized mainly by the optimum air temperature but by high relative humidity and by excessive air flow, the highest average ejaculate volume with a lower average sperm concentration and with a maximum occurrence of abnormal sperms was recorded. The parametric differences in ejaculate quality in summer and winter seasons were statistically significant, however, their variations did not exceed the spermiologic standard throughout the year. The found decrease in conception rate of sows after the first insemination by the semen of the followed set of breeding boars in warm months is obviously to be attributed to the sows or to the changes of other andrological criteria than those being subject of this study.

Animal Husbandry↗
PubMed1980

A comparison of developmental dynamics of Dermacentor reticulatus (Fabr.) of different geographic origins and their affection by different microclimate.

Developmental dynamics of D. reticulatus ticks of different geographic origins (NE Poland and SW Slovakia) were investigated and compared. A long-term field experiment was conducted in South Moravia in the zone of thermophilic oak forest. Ticks were studied in two different biotopes: in an open grassy area and in deciduous forest. Differences between the tick populations collected in Poland and Slovakia were observed in the duration of developmental cycle and in the outcome of metamorphosis, depending on biotope. The tick development in the open grassy area was more rapid, but with greater losses. The total production of adults was higher in the population originating from Slovakia.

Animals↗
PubMed1993

[Use of the WBGT-index for evaluation of the heating microclimate in industrial conditions].

The article covers the results showing relationships between the parameters of human heat status and an integral parameter WBGT index (ISO 72443). The significant strong correlation was shown between WBGT index, average skin temperature and heat sensation, medium correlation was seen between WBGT index, changes in heat content of the body, water losses and pulse rate. Approximate values of WBGT index were calculated for the human doing the light physical work. The stated values describe various heat status taking into account the time of hyperthermia.

Body Temperature Regulation↗