Photocatalytic NO removal over defective Bi/BiOBr nanoflowers: The inhibition of toxic NO2 intermediate via high humidity
Xin YueQiuhui ZhuTing GaoXiming LiWei ZhangHui WangDonghang JiYu HuangMohsen PadervandFeng YuChuanyi Wang
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Bismuth
The AC conductivity of aluminium sulphate (Al2(SO4)3.16H2O) is found to be strongly humidity dependent. This property has been used to develop a humidity sensor. The AC conductance of the specially designed humidity sensor varies ~103-fold when the relative humidity changes from 22 to 88%. It is observed that the AC conductance of aluminium sulphate varies exponentially with relative humidity between 35 and 70% relative humidity levels. A transducer using aluminium sulphate may be designed for developing a humidity sensor effective between the 35 and 70% relative humidity levels. The effect of frequency on conductance is insignificant in the higher-frequency region.
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This paper is aimed at introducing the findings from our measurement and investigation on the high temperature and humidity environment for paper-making plants.In hoping to find out the distribution regularity between the temperature and humidity in the papermaking workshops with hot and humid environment,we have carried out field measurements and investigations of five paper-making plants in different regions all over the country in different seasons.The results of our measurements and analysis reveal some regular results between the temperature and the height of the workshop buildings of such paper-making plants.To be exact,conclusions have been made that the temperature in such buildings increases with the height vertically no matter whether in summer or in winter,but the temperature in summer rises much more remarkable in comparison with that in winter.Moreover,a comparative formula has been derived with the increase of the height as compared with that of the temperature.However, the formula is just applicable for a building height below six meters.In addition,we have also worked out the relative humidity and the humidity ratio to the comparative temperature.Actually,the relative humidity and humidity ratio can be taken as the hierarchical distribution features,though they are not entirely in proper ratio to each other,for the temperature is not only related to the humidity but also to the temperature change.In some ways,it can be said that the higher the temperature,the lower the relative humidity with the humidity ratio being constant.Furthermore,both the relative humidity and humidity ratio distribution characteristics are closely related to the moisture diffusion degree and the mode of paper machines in the workshops.And,finally,we have also made believe that such a kind of hot and humid environment is harmful for the workers to stay long. In one word,the above investigation and analysis have done on temperature and humidity distribution characteristics are expected to provide an important reference for designing better ventilation conditions in such plants so as to improve better working environment both for the workers and for working machines.
Apparent temperature
Critical relative humidity
Papermaking
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The effect of an abrupt change in the relative humidity on the viability of airborne Mycoplasma pneumoniae has been examined. When the microbial aerosols were permitted to equilibrate in air held at either low or high humidities and were then subjected to a sudden shift to a mid-range humidity, a significant loss (>90%) of the colony-forming units per liter of aerosol occurred within 8 min. In contrast, a change in the relative humidity of more than 18% in either direction from a lethal mid-range humidity noticeably decreased the rate of biological decay. Double humidity shifts (i.e., from dry to a mid-range level and then to a high humidity range) were very detrimental, with very few survivors after 8 min. These results indicate that the biological stability of airborne M. pneumoniae may be easily modified by a sudden change in the relative humidity, such as occurs in natural atmospheres. This increased sensitivity brought about by producing changes in relative humidity through the lethal humidity range may provide a method whereby the control of these organisms in naturally contaminated indoor air environments may be eventually achieved.
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Saturation (graph theory)
Critical relative humidity
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Redistribution
Settling
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To study the change and influence of humidity around Hongze Lake, the absolute humidity was calculated by using the observation data of 16 weather stations from 1981 to 2020. The absolute and relative humidity were then compared. The influence of Hongze Lake on the humidity in the surrounding area was investigated by comparing it with that of other stations. In the past 40 years, humidity showed significant changes interannually. The annual absolute humidity showed a peak and decreased while the relative humidity showed two peak values. Under the influence of global warming, the absolute humidity decreased during the past 40 years but the relative humidity increased. This showed overall warming and drying. The humidity around Hongze Lake was slightly higher than that in other places. The humidity around Hongze Lake was affected by the Lake and the location, which needs further study. The regulating effect of Hongze Lake on the humidity in the surrounding area was verified in this study. The result provides a basis for meteorological service and environmental protection of the ecosystem in the surrounding area of Hongze Lake.
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Critical relative humidity
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Humidity is a very important factor in representing the severity of electrostatic discharge (ESD). Low humidity indicates high risk of ESD problems; high humidity indicates low risk of ESD problems. Both relative humidity and absolute humidity can represent the level of humidity: which one is more important? The reported measurement result shows that relative humidity is more important in the discharge phase. The qualitative analysis is given.
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