scholarly journals Determinism of nonadditive litter mixture effect on decomposition: Role of the moisture content of litters

2021 ◽  
Author(s):  
Sébastien Gogo ◽  
Fabien Leroy ◽  
Renata Zocatelli ◽  
Adrien Jacotot ◽  
Fatima Laggoun‐Défarge
Keyword(s):  
Moisture Content ◽  
Mixture Effect ◽  
Litter Mixture

scholarly journals Influence of moisture content on the contact angle and surface tension measured on birch wood surfaces

2021 ◽  
Author(s):  
Rami Benkreif ◽  
Fatima Zohra Brahmia ◽  
Csilla Csiha
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Moisture Content ◽  
Solid Wood ◽  
Contact Angles ◽  
Surface Moisture ◽  
Wood Coatings ◽  
The Relationship ◽  
Wood Surfaces

AbstractSurface tension of solid wood surfaces affects the wettability and thus the adhesion of various adhesives and wood coatings. By measuring the contact angle of the wood, the surface tension can be calculated based on the Young-Dupré equation. Several publications have reported on contact angle measured with different test liquids, under different conditions. Results can only be compared if the test conditions are similar. While the roles of the drop volume, image shooting time etc., are widely recognized, the role of the wood surface moisture content (MC) is not evaluated in detail. In this study, the effect of wood moisture content on contact angle values, measured with distilled water and diiodomethane, on sanded birch (Betula pendula) surfaces was investigated, in order to find the relationship between them. With increasing MC from approximately 6% to 30%, increasing contact angle (decreasing surface tension) values were measured according to a logarithmic function. The function makes possible the calculation of contact angles that correspond to different MCs.

Role of initial apparent viscosity and moisture content on post irradiation rheological properties of guar gum

2009 ◽  
Vol 23 (7) ◽  
pp. 1785-1791 ◽  
Author(s):  
Sumit Gupta ◽  
Bhavini Shah ◽  
Bhaskar Sanyal ◽  
Prasad S. Variyar ◽  
Arun Sharma
Keyword(s):  
Moisture Content ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Guar Gum ◽  
Post Irradiation

scholarly journals EXAMINATION OF THE ROLE OF MOISTURE CONTENT ON THE SPONTANEOUS COMBUSTION OF COAL (SCC)

2019 ◽  
Vol 34 (3) ◽  
pp. 61-71
Author(s):  
Amir Saffari ◽  
◽  
Mohammad Ataei ◽  
Farhang Sereshki ◽  
◽  
...  
Keyword(s):  
Moisture Content ◽  
Spontaneous Combustion ◽  
Spontaneous Combustion Of Coal

scholarly journals The role of Mg value and moisture content of decomposed products during the decomposition process of carnallite in aqueous solution: a novel monitoring method

RSC Advances ◽  
2020 ◽  
Vol 10 (35) ◽  
pp. 20529-20535
Author(s):  
Huaide Cheng ◽  
Qingyu Hai ◽  
Jianguo Song ◽  
Xuehai Ma ◽  
Changzhong Li
Keyword(s):  
Aqueous Solution ◽  
Moisture Content ◽  
Decomposition Process ◽  
Monitoring Method

The amount of water is the crucial factor for the decomposition of carnallite in aqueous solution.

Heavy rainfall event on 30th June 2017 in Moscow: physical drivers and statistical background 

2021 ◽  
Author(s):  
Yulia Yarinich ◽  
Mikhail Varentsov ◽  
Vladimir Platonov ◽  
Victor Stepanenko
Keyword(s):  
Soil Moisture ◽  
Water Vapor ◽  
Moisture Content ◽  
Extreme Rainfall ◽  
Moscow Region ◽  
Asia Pacific ◽  
Leeward Side ◽  
Local Factor ◽  
Urban Impacts

<p>The extreme rainfall on June 30, 2017 in the central part of the European territory of Russia is one of the strongest precipitation events ever observed in this region. According to ground observations, it caused the record precipitation amount per day for June in Moscow (65 mm) since 1970.</p><p>Our study considers physical and synoptic drivers of the extreme rainfall on June 30, 2017 as well as statistical estimates of such phenomena’s repeatability for the Moscow region. The degree of extremality of this phenomenon has been assessed using long-term observational time series since second half of the 20<sup>th</sup> century. Based on meteorological observations, radar data and ERA5 reanalysis we demonstrate that rainfall was associated with three mesoscale convective systems (two squall lines [Markowski, Richardson, 2010] and one meso-beta scale convective system) which appeared in the warm sector of a cyclone. The main cause for their development was an anomalously high total moisture content for the region which reached 41.5 kg / m<sup>2 </sup>and exceeded 0.995 percentile in the sounding data over Moscow [Durre et al., 2006] for the period 1957 – 2017. An analysis of the water vapor balance components using ERA5 reanalysis showed that advection of water vapor was the main factor in the appearance of the quasilinear region of an extremely high moisture content (“atmospheric river”). A smaller but very noticeable role was played by evaporation from the earth surface, largely controlled by the soil moisture.</p><p>Besides evaporation, another local factor which may intensify precipitation are the physical effects induced by a big city [Han et al., 2014]. To test the role of the Moscow city and soil moisture in the June 30 case the mesoscale non-hydrostatic model COSMO 5.05 with 3 km grid was used. The simulation result confirmed an idea of the significant role of evaporation from the earth's surface in precipitation intensity: a 10-times decrease in soil moisture in the initial conditions led to a 3-times decrease in the daily amount of precipitation in the study area. Urban-induced effects of the Moscow megacity were studied by running sensitivity model experiments with COSMO where bulk urban canopy model TERRA_URB was switched on or off. The account for urban surface effects did not provide any noticeable increase in the amount of precipitation in the Moscow region, but led to redistribution of the daily precipitation sum and its increase at the leeward side of the megacity.</p><p><strong>Acknowledgements:</strong></p><p>The bulk of the study was funded by Russian Foundation for Basic Research under project number 20-35-70044. The statistical assessment was supported by the grant of President of Russian Federation for young PhD scientists No. МК-5988.2021.1.5.</p><p><strong>References:</strong></p><p>Durre, I., Vose, R. S., & Wuertz, D. B. (2006). Overview of the integrated global radiosonde archive. <em>Journal of Climate</em>, <em>19 </em>(1), 53-68.</p><p>Han, J. Y., Baik, J. J., & Lee, H. (2014). Urban impacts on precipitation. <em>Asia-Pacific Journal of Atmospheric Sciences</em>, <em>50 </em>(1), 17-30.</p><p>Markowski, P., & Richardson, Y. (2011). <em>Mesoscale meteorology in midlatitudes</em> (Vol. 2). John Wiley & Sons.</p>

Role of ferromagnetic metal velvet and DC magnetic field on the explosion of a C3H8/air mixture-effect on reaction mechanism

Energy ◽  
2022 ◽  
Vol 239 ◽  
pp. 122218
Author(s):  
Shangyong Zhou ◽  
Jiancun Gao ◽  
Zhenmin Luo ◽  
Shoutao Hu ◽  
Le Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Reaction Mechanism ◽  
Ferromagnetic Metal ◽  
Mixture Effect ◽  
Dc Magnetic Field

Variability in the Environmental Factors Driving Evapotranspiration from a Grazed Rangeland during Severe Drought Conditions

2007 ◽  
Vol 8 (2) ◽  
pp. 207-220 ◽  
Author(s):  
Joseph G. Alfieri ◽  
Peter D. Blanken ◽  
David N. Yates ◽  
Konrad Steffen
Keyword(s):  
Soil Moisture ◽  
Environmental Factors ◽  
Moisture Content ◽  
Land Surface ◽  
Soil Moisture Content ◽  
Severe Drought ◽  
Vapor Transfer ◽  
Drought Conditions ◽  
Using Data

Abstract Nearly one-half of the earth’s terrestrial surface is susceptible to drought, which can have significant social, economic, and environmental impacts. Therefore, it is important to develop better descriptions and models of the processes linking the land surface and atmosphere during drought. Using data collected during the International H2O Project, the study presented here investigates the effects of variations in the environmental factors driving the latent heat flux (λE) during drought conditions at a rangeland site located in the panhandle of Oklahoma. Specifically, this study focuses on the relationships of λE with vapor pressure deficit, wind speed, net radiation, soil moisture content, and greenness fraction. While each of these environmental factors has an influence, soil moisture content is the key control on λE. The role of soil moisture in regulating λE is explained in terms of the surface resistance to water vapor transfer. The results show that λE transitioned between being water or energy limited during the course of the drought. The implications of this on the ability to understand and model drought conditions and transitions into or out of droughts are discussed.

What is the role of the accessibility of wood hydroxyl groups in controlling moisture content?

2013 ◽  
Vol 48 (18) ◽  
pp. 6352-6356 ◽  
Author(s):  
Lauri Rautkari ◽  
Callum A. S. Hill ◽  
Simon Curling ◽  
Zaihan Jalaludin ◽  
Graham Ormondroyd
Keyword(s):  
Moisture Content ◽  
Hydroxyl Groups

scholarly journals In situ and laboratory non-additive litter mixture effect on C dynamics of Sphagnum rubellum and Molinia caerulea litters

2015 ◽  
Vol 16 (1) ◽  
pp. 13-27 ◽  
Author(s):  
Sébastien Gogo ◽  
Fatima Laggoun-Défarge ◽  
Fatima Merzouki ◽  
Stéphane Mounier ◽  
Audrey Guirimand-Dufour ◽  
...  
Keyword(s):  
Molinia Caerulea ◽  
Mixture Effect ◽  
C Dynamics ◽  
Litter Mixture
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