On the Origins of Sudden Adhesion Loss at a Critical Relative Humidity: Examination of Bulk and Interfacial Contributions

Langmuir ◽  
2008 ◽  
Vol 24 (17) ◽  
pp. 9189-9193 ◽  
Author(s):  
Kar Tean Tan ◽  
Bryan D. Vogt ◽  
Christopher C. White ◽  
Kristen L. Steffens ◽  
Joshua Goldman ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Critical Relative Humidity

Experimental Study on Hygroscopicity of Rapeseed (Brassica Napus)

2012 ◽  
Vol 479-481 ◽  
pp. 2275-2278
Author(s):  
Ming Jin Yang ◽  
Wu Ming Xu ◽  
Tian Tang ◽  
Ling Yang ◽  
Feng Liu
Keyword(s):  
Experimental Study ◽  
Brassica Napus ◽  
Relative Humidity ◽  
Moisture Absorption ◽  
Early Period ◽  
Critical Relative Humidity ◽  
Temperature And Humidity ◽  
Higher Temperature

The hygroscopicity property of the rapeseed at different temperature and humidity was experimental studied in this paper. Tested results show that: the moisture absorption rates increase with the increase of relative humidity at the early period of absorption, and higher temperature leads to earlier reach of moisture equilibrium; the critical relative humidity(CRH) increases with the increase of temperature; the optional relative humidity for safety storage of rapeseed should be controlled less than 60%.

scholarly journals Calculating the Critical Relative Humidity from the Solubility of Electrolyte According to Extended Non-random Two Liquid Model

2009 ◽  
Vol 57 (9) ◽  
pp. 943-947 ◽  
Author(s):  
Yingli Wang ◽  
Xiancheng Zhan ◽  
Chaoqun Xiang ◽  
Jia Chen ◽  
Lan Cao ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Liquid Model ◽  
Critical Relative Humidity

The atmospheric conditions affecting sporulation of blue mould in tobacco

1964 ◽  
Vol 4 (13) ◽  
pp. 178 ◽  
Author(s):  
BG Collins
Keyword(s):  
Wind Speed ◽  
Relative Humidity ◽  
Air Temperature ◽  
Critical Parameter ◽  
Leaf Surface ◽  
Atmospheric Conditions ◽  
Blue Mould ◽  
Growing Seasons ◽  
Ambient Relative Humidity ◽  
Critical Relative Humidity

Conditions favouring sporulation of blue mould (Peronospora tabacina Adam) having been established in the laboratory, a theoretical model has now been used to express the critical parameter, i.e. the relative humidity near the leaf surface where the spores form, in terms of the ambient atmospheric conditions. To test the validity of this model, wind speed, air temperature, and relative humidity mere measured over four growing seasons in three tobacco crops in the Ovens Valley, Victoria, and related to times of sporulation of the mould observed concurrently in these crops. 'Critical relative humidity,' a function of wind speed, air temperature, and heat loss from the crop is shown to be a more serviceable indicator of likelihood of sporulation than either ambient relative humidity or rainfall.

Laboratory Studies on the Bionomics of the Rat Fleas, Xenopsylla brasiliensis, Baker, and X. cheopis, Roths

1947 ◽  
Vol 38 (2) ◽  
pp. 263-280 ◽  
Author(s):  
E. B. Edney
Keyword(s):  
Relative Humidity ◽  
Water Vapour ◽  
Dry Weight ◽  
Total Weight ◽  
Laboratory Studies ◽  
Critical Relative Humidity ◽  
Water Contents ◽  
Do So

1. The original purpose of the present work was to confirm a previous finding that, in unfed adult Xenopsylla, longevity varies according to the humidity during the cocoon period, and to find whether this is due to differential loss of water during the prepupal period. The previous finding has been confirmed, but the cause is shown to lie in loss of water during the pupal and not the prepupal period.2. Prepupae are shown to gain in weight by the absorption of water vapour from the air if kept at 24°C. and any relative humidity from 50–90 per cent. If kept below 45 per cent. R.H. they rapidly dry and fail to pupate.3. During this period (about three and a half days from cocoon spinning to pupation at 24°C.) the dry weight decreases by about 2 per cent, of the original total weight, and the total weight increases by from 4–29 per cent., with a mean of 14 per cent.4. The amount of water absorbed is independent of relative humidity within the range 50–90 per cent., and is approximately equal to the increase in total weight.5. The critical relative humidity, below which the insects die and above which they absorb water, is shown to be substantially the same (from 45 to 50 per cent. R.H.) at 12°, 24° and 35°C.6. After pupation the insects begin to lose water and continue to do so throughout the period. The rate of loss increases with decreasing humidity, though the effect of humidity is not very great.7. Adults emerging from pupae kept at higher humidities weigh more, have higher percentage water contents, and live longer without food, than those emerging from pupae kept at lower humidities.8. The results are discussed in the light of previous work, and suggestions as to the mechanism of the process of absorption of water are made.

Determining critical relative humidity by measuring air humidity in equilibrium directly

2010 ◽  
Vol 41 (2) ◽  
pp. 383-387 ◽  
Author(s):  
Xiancheng Zhan ◽  
Yingli Wang ◽  
Lan Cao ◽  
Linli Li ◽  
Chengrong Li
Keyword(s):  
Relative Humidity ◽  
Air Humidity ◽  
Critical Relative Humidity
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