Moisture

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moisture

[′mȯis·chər]
(climatology)
The quantity of precipitation or the precipitation effectiveness.
(meteorology)
The water vapor content of the atmosphere, or the total water substance (gaseous, liquid, and solid) present in a given volume of air.
(physical chemistry)
Water that is dispersed through a gas in the form of water vapor or small droplets, dispersed through a solid, or condensed on the surface of a solid.

Moisture

 

the water content of physical bodies. Moisture depends upon the relative humidity of the surrounding environment, upon the nature of the substance, and, in solids, also upon the degree of porosity and the size of the particles—that is, the general dimensions of the interior and exterior surfaces of the objects. The concept of moisture does not include the content of crystalline water or of chemically bound, so-called constitutional, water—for example, the H2O that is produced only during chemical decomposition.

Moisture is usually characterized by the quantity of water in a substance, expressed in the percentage of the original mass of the moist substance (moisture by mass) or its volume (volume moisture). Moisture can also be characterized as the moisture content, or absolute moisture—the quantity of water relative to a unit of weight of the dry portion of the substance. It is of great significance to the national economy to establish the acceptable degree of moisture for many products and materials; such substances as grain or cement are only useful up to a certain moisture content. The vitality of animal and plant organisms is possible only within certain limits of moisture and relative humidity of the surrounding atmosphere.

References in periodicals archive ?
The effect of soil moisture on the number of eggs laid in cages by females was analyzed with square root transformed data using PROC GLM, SAS Version 9.
There was a significant effect of soil moisture on the mean number of eggs laid by P.
Reduced oviposition in very dry soil (0-5% soil moisture for sandy loam and sandy soils) was observed by Allsopp et al.
This study did not investigate the effect of prolonged exposure to low or high soil moisture on egg survival, but the results show that eggs laid in very dry and wet soil are capable of surviving to eclosion if soil moisture returns to approximately field capacity.
m] is specific moisture, M is moisture potential, [q.
If we assume isotropy and isothermal moisture transfer, then the relation between the mass flux [q.
Boundary conditions for moisture diffusion are determined with the following equation (Srpcic et.
If the moisture level is too high, moisture-related defects will occur.
This means that extra bond must be added in order to achieve the target compactabiity given the same moisture and mulling time.
Normally, the clay in the return sand is at a similar moisture level to the bond added at the muller so that all clay is being hydrated at the same rate (Fig.
Atlas will have a new compact xenon-exposure instrument, model S3000, which reproduces and accelerates the natural effects of light, moisture, and heat in a controlled exposure.
Moisture content measured quickly, automatically down to 0.