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At least 1,387 records · Page 77Linked to original sources
PubMed2002

[Microclimatic effect and soil moisture change of poplar-wheat intercropping systems in Huaibei Plain].

In this paper, the microclimatic effect and the soil moisture of poplar-wheat intercropping systems were studied. The results indicated that the strip intercropping, comparing with the contrast, could increase the relative humidity by 2-8%, decrease the surface temperature by 1-7 degrees C, and reduce wind speed. The illumination hours were decreased with the time and the distance between the rows, and the varying range was within 4.1-15.3%. In shelterbelt network, the relative humidity was increased by 6.4-11.6%, and the illumination hours were decreased by 8.5-11.7%. In strip intercropping, the intercropping systems could improve soil moisture, which was varied with the intensity of tree, and generally, the increase of soil moisture was about in a range of 0.67-3.87%. In shelterbelt network, the soil moisture was related to the orientation and the distance from the shelterbelt, and there existed negative correlation between the soil moisture and the distance in all orientations.

China↗
PubMed1975

[Thermal sensation and the thermoregulatory vascular reactions in man].

It was shown by the method of continuous highly sensitive thermometry of the human skin with a simultaneous recording of the verbal reports of the thermal feeling that the most important thermoregulatory reactions of the dermal vessels of the limbs were definitely related to the particular temperature sense.

Blood Vessels↗
PubMed2002

[The impact of selected environmental factors on the morbidity of children in day care centers].

The purpose of this review was to present the existing evidence of the relation between children's absence from day-care centres caused by disease and environmental factors, such as hygienic standard, space per child, and indoor climate in day-care centres. The review is based on results from cohort studies and randomised, controlled studies identified through literature searches. There is good evidence that improved hand hygiene may reduce the morbidity and absence among children attending day-care centres. The effect of the efforts varies from a few to 50 per cent. On the background of cohort studies there is some evidence that available space per child in the day-care centres is also correlated to the rate of absence caused by diseases. The impact of noise and indoor climate in day-care centres and the time spent outdoors has so far only been sparsely investigated but seems to be of some importance.

Air Pollution, Indoor↗
PubMed1992

[Ventilatory function of the lungs in galenite ore miners].

The study was carried out on a group of 54 galenite miners (composed of PbS slats) (age 37.9 +/- 7.5 years). The following parameters were assessed: VC, TLC, RV, RV%TLC, FEV1, FEV1%VC, Raw, Gaw, FEF50%, FEF75%. Also the ventilatory homogeneous index was calculated V2:V1 basing on the analysis of the flow volume curve. The control consisted of subjects living in the vicinity of the mine and smelting works. In 3.1% of the miners various stages of increased flow obstruction was found. In 8.3% signs of emphysematous changes, in 23.9% minor disturbances of bronchial resistance. In comparison with the control the miners demonstrated expiratory flow mainly in the small airways. Duration of exposure and co-existent chronic bronchitis increased the above mentioned observations and decreased the homogeneity index.

Adult↗
PubMed1992

[Prospective epidemiological studies of chronic bronchitis in workers in a coke-processing plant].

In 1977 an epidemiological survey was carried out on incidence of chronic bronchitis in 652 workers (age 20-64) of a coking plant. The survey was repeated six years later in 300 of the original participants (56%). The aim of the study was to assess the effect of smoking, age and occupation on incidence of chronic bronchitis and dynamic change of FEV1 values during the six years. During the 6 years the incidence of chronic bronchitis rose from 22% to 43%. Mean annual decrease of FEV1 was higher in smokers as compared to nonsmokers (57.4 versus 52.6 ml per year). Higher mean falls of FEV1 values were noted in subjects with occupational risk factors present (68.4 ml) in comparison with those with low occupational exposure (51.2 ml). Susceptible subjects presented a thrice higher annual FEV1 decrease rate (142 ml).

Adult↗