humidity


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Related to humidity: relative humidity, Humidity Control

humidity

 [hu-mid´ĭ-te]
the degree of moisture in the air.
absolute humidity the actual amount of vapor in the atmosphere, expressed in milligrams per liter.
relative humidity the percentage of moisture in the air as compared to the amount necessary to cause saturation, which is taken as 100.
humidity therapy the therapeutic use of water to prevent or correct a moisture deficit in the respiratory tract. Under normal conditions the respiratory tract is kept moist by humidifying mechanisms that allow for evaporation of water from the respiratory mucosa. If these mechanisms fail to work, are bypassed (such as with an endotracheal tube), or are inadequate to overcome the drying and irritating effects of therapeutic gases and mucosal crusting, some form of humidification must be provided.

The principal reasons for employing humidity therapy are: (1) to prevent drying and irritation of the respiratory mucosa, (2) to facilitate ventilation and diffusion of oxygen and other therapeutic gases being administered, and (3) to aid in the removal of thick and viscous secretions that obstruct the air passages. Another important use of water aerosol therapy is to aid in obtaining an induced sputum specimen.

Humidity therapy may be delivered in a variety of ways. Humidifiers and vaporizers increase the water content of an environment and are limited to the treatment of upper respiratory disorders because they produce particles that are too large to penetrate deeply into the lungs. Nebulizers generate clouds or mists of particles that are extremely small and thus capable of penetrating more deeply into the bronchioles and small structures of the lower respiratory tract. Examples of these include jet instruments and ultrasonic nebulizers.

hu·mid·i·ty

(hyū-mid'i-tē),
Moisture or dampness, as of the air.
[L. humiditas, dampness]

humidity

[hyo̅o̅mid′itē]
Etymology: L, humidus, moist
the level of moisture in the atmosphere, which varies with the temperature. The percentage is usually represented in terms of relative humidity, with 100% the point of air saturation, or the level at which the air can absorb no additional water.

hu·mid·i·ty

(hyū-mid'i-tē)
Moisture or dampness, as of the air.
[L. humiditas, dampness]

hu·mid·i·ty

(hyū-mid'i-tē)
Moisture or dampness, as of the air.
[L. humiditas, dampness]

humidity,

n pertaining to the level of moisture in the atmosphere, the amount varying with the temperature. The percentage is usually represented in terms of relative humidity, with 100% being the point of air saturation or the level at which the air can absorb no additional water without an increase in temperature.

humidity

the degree of moisture in the air.

humidity therapy, humidification therapy
the therapeutic use of water to prevent or correct a moisture deficit in the respiratory tract. Under normal conditions the respiratory tract is kept moist by humidifying mechanisms that allow for evaporation of water from the respiratory mucosa. If these mechanisms fail to work, are bypassed as in endotracheal intubation, or are inadequate to overcome the drying and irritating effects of therapeutic gases and mucosal crusting, some form of humidification must be provided.
References in periodicals archive ?
IEQ is impacted by factors such as indoor air quality (IAQ) and lighting, but the effects of low humidity on IAQ were primarily studied in the literature.
The green beans were maintained for at least 6 d at 23 [+ or -] 1 [degrees]C, 85 [+ or -] 10% relative humidity, and a photoperiod of 14:10 h L:D, and the number of larval thrips in each container was recorded at 12 h intervals.
As the weather at this time of year is incredibly hot, a lower humidity will definitely ensure things feel more bearable, but both high and low humidity come with their own health warnings.
Achieving proper temperature and humidity control is an essential part of food manufacturing and storage.
c] is the calculated PI humidity, %; A, B, k, a are the table data for certain type of insulation; [[theta].
High relative humidity degrades reliability significantly, having a much more substantial impact than temperature or temperature variation," the researchers write.
Quality Traits Assessment: Percentage of crude fibre (CF), crude protein (CP), dry matter digestibility (DMD), water soluble carbohydrates (WSC), acid detergent fibre (ADF), neutral detergent fibre (NDF) and ash of both ambient humidity and frozen storage seeds were compared with control seeds using near infrared radiation (NIR) spectroscopy.
We mimicked the bilayer structure to make an actuator that can generate motions by using environmental humidity change," Kim said.
Inspection Frequencies Defined in AR 740-1 (see Table 5-1) Type Storage Interval (months) Controlled humidity or equivalent when such 60 rating has been approved by higher authority.
Using a combo meter, which offers pin-less, pin and RH measuring technology, will cover all applications to measure moisture and humidity, helping avoid moisture problems and tracking when they occur.
Also, when humidity is low, our nasal passages are drier, which helps the virus stick.