An apparatus used to measure atmospheric humidity, using a drying agent to absorb and then to weigh the amount of water vapor in a known quantity of air.
In optics, a lens often used in eyeglasses, designed to absorb certain wavelengths in order to inhibit their passage through the lens.
An instrument used to measure the amount of light transmitted through a transparent liquid or solid by means of a photocell or other light detector.
absorption modulation (s) (noun)
; absorption modulations (pl)
In acoustical engineering, a type of amplitude modulation that couples a variable-impedance device; such as, a microphone, to the output stage of a radio transmitter.
Energy is thus absorbed from the transmitter according to the information captured by the microphone.
In building engineering, the amount of water absorbed by a brick or other porous building material, expressed in grams or ounces per minute.
A technique for determining the concentration and structure of a substance, by measuring the amount of electromagnetic radiation that the sample absorbs at various wavelengths.
Spectrum of absorption lines produced when light passes through and is partially absorbed by a substance.
In thermodynamics, the ratio of the energy absorbed by a body to the total energy incident upon the same body.
AGM battery, absorbed glass mat battery
A type of sealed lead-acid battery in which the electrolyte is absorbed
in a matrix of glass fibers, which holds the electrolyte next to the plate, and immobilizes it to prevent spills.
AGM batteries tend to have good power characteristics and low internal resistance.
The normal absorption of water (important in the conservation of body fluids) and products of bacterial action; especially, in the ascending colon.
Some nutrients and drugs are absorbed by the lower bowel. In humans, cellulose is not digested or absorbed but passes from the body as unchanged residue.
cutaneous absorption, percutaneous absorption
Absorption through the skin.
To remove (a substance, etc.) from the surface upon which it is adsorbed.
, desorptions (pl) (nouns)
1. That which changes from an adsorbed state on a surface to a gaseous or liquid state: "Chemists have developed a desorption boron-nitrogen-based liquid-phase storage material for hydrogen that works safely at room temperature and is both air-and moisture-stable."
2. The process in which atomic or molecular species leave the surface of a solid and escape into the environment and so it is the opposite of absorption: "In addition to renewable hydrogen production, the development of desorptions of hydrogen storage technologies continues to be an important task toward establishing a hydrogen-based energy infrastructure."
"In addition to its temperature and stability properties, the newly developed hydrogen storage technologies also feature hydrogen desorption, without any phase change which is clean, fast, and controllable."
dual beam absorptiometry
A radiographic technique to measure tissue density by measuring the amount of absorbed radiation.
One use is to detect bone loss in the spine and hips.
dual photon absorptiometry
The use of two sources of radiation of different energies to measure the density of a material; especially, bone.
Bone densitometry is a method of determining the density of bone by use of radiographic techniques. The use of dual photon absorptiometry will provide density data of the axial skeleton with a precision of 97 percent to 98 percent. It is used in testing for the degree of osteoporosis.