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 study took into account seed coat removed, moisture content reduction, and enzyme activity.
A 20-gram sample/replicate was retained for moisture content determination before and after blanching.
In these experiments, individual female P aliena beetles were placed in 1 of 3 soil moisture levels in closed cages.
A moderately dark sandy loam soil (average of 63.6% sand, 28.4% silt, and 8.1% clay determined through laboratory testing at the Environmental and Agricultural Testing Service in the Department of Soil Science at North Carolina State University), obtained from the field where beetles were collected, was brought to the laboratory, mixed by hand, oven-dried (150 [degrees]F, i.e., 65.6 [degrees]C) and then brought to 2%, 11%, and 20% soil moisture (i.e., gravimetric water content by mass) and used for all experiments.
Moisture diffusion in the cross section of wood and wood products can be described by basic mass balance equation.
Equation (1) relates the mass change in the time unit and over the with the moisture diffusion.
One can pour a gallon of water onto a dry heap of sand and correctly state that the resulting combination is now at 3% moisture, but this doesn't take into account how well the sand has been conditioned.
This ratio affects how well the green sand forms mold features, the severity of defects due to excessive moisture and the amount of sand inclusions.
You should always calibrate your moisture sensors to read 0 percent moisture when the aggregate is at SSD condition.
We have investigated the absorption effect by testing moisture sensors in tropical countries.
The work presented in this paper is the first step to account for simultaneous heat and moisture transfer in simulations of building envelope components and thus account for moisture durability issues caused by unintentional air exfiltration and infiltration during the design process.
Arizona Instrument Corp., also of Tempe, will launch the latest addition to its line of Computrac moisture analyzers.