electro-, electr-, electri-

(Greek > Latin: electric, electricity; from amber, resembling amber, generated from amber which when rubbed vigorously [as by friction], produced the effect of static electricity)

Electronics in our lives consists of numerous tools

Equipment which we use everyday relies on electronics to function including calculators, car controls, cameras, washing machines, medical scanners, mobile telephones, radar systems, computers; as well as many other applications or devices which are listed in this unit.

gold-leaf electrometer, gold leaf electrometer
A simple instrument for measuring an electrical charge.

A support in an insulating chamber which has a moveable gold leaf attached to it.

Increasing the same charge causes increasing forces of repulsion, which causes additional movements of the gold leaf away from the support.

gold-leaf electroscope, gold leaf electroscope
A device consisting of two pieces of thin gold foil, or gold leaf, joined at their upper ends and suspended inside a glass jar.

When an electric charge is applied to the terminal connected to the gold leaves, they spread apart because of the repulsion of the same levels or amounts of charges on them.

helioelectrical, helioelectricity
Converting energy from the sun to electricity; that is, by means of photovoltaics (solar cells).
high-voltage electrophoresis
Electrophoresis, often using paper as a support to the solution, in which a high potential, often a few kilovolts, is used.

Electrophoresis is the motion of charged particles in a colloid (mixture in which one substance is divided into minute particles, called colloidal particles, and dispersed throughout a second substance) under the influence of an electric field. Particles with a positive charge go to the cathode and negative charge to the anode.

histidine or His (tissue) bundle electrography
1. A test that measures electrical activity in a part of the heart which carries the signals that control the time between heartbeats or contractions.
2. The recording of an electrogram from the His bundle (arioventricular bundle or a group of fibers that carry electrical impulses through the center of the heart) usually by an intravenous introduction of an electrode.

Risks of the procedure include:

  • Arrhythmias or any disorder of the heart rate or rhythm during which the heart beats too quickly, too slowly, or with an irregular pattern.
  • Cardiac tamponade or the compression of the heart that occurs when blood or fluid builds up in the space between the myocardium (the muscle of the heart) and the pericardium (the outer covering sac of the heart).
  • Embolism from blood clots at the tip of the catheter.
  • Heart attack which takes when blood vessels that supply blood to the heart are blocked, preventing enough oxygen from getting to the heart.
  • Hemorrhage or the escape of blood from a ruptured vessel.
  • Infection, an invasion by and multiplication of pathogenic microorganisms in a bodily part or tissue, which may produce subsequent tissue injury and progress to an overt disease through a variety of cellular or toxic mechanisms.
  • Injury to the vein or artery.
  • Low blood pressure.
  • Stroke or the interruption of the blood supply to any part of the brain
The conversion of water power into electric power.
1. A form of energy generated by the conversion of free-falling water to electricity.
2. The generation of electricity by using the motive power of water.
3. Relating to or producing electricity by the force of fast moving water; such as, rivers or waterfalls.

In many countries, hydroelectricity is the primary source of electrical power.

Galvanic stimulation of a portion of the body immersed in water.
hydrogen electrode
An electrode that absorbs hydrogen gas; used in pH measurement.
I electroretinogram
An electroretinogram which exhibits inhibitory characteristics derived from the cones.
immobilized enzyme electrode
A chemical sensor that is highly selective due to a specific enzyme incorporated into its structure.
A method of determining the blood levels of three major immunoglobulins:
  1. immunoglobulin M (IgM)
  2. immunoglobulin G (IgG)
  3. immunoglobulin A (IgA)

Immunoelectrophoresis is a powerful analytical technique with high resolving power as it combines separation of antigens by electrophoresis with immunodiffusion against an antiserum.

Immunoelectrophoresis aids in the diagnosis and evaluation of the therapeutic response in many disease conditions affecting the immune system.

It is usually requested when a different type of electrophoresis, called a serum protein electrophoresis, has indicated a rise at the immunoglobulin level; it is also used frequently to diagnose multiple myeloma, a disease affecting the bone marrow.

indirect measurement of electrolytes
The measurement of serum ions; such as, sodium, chloride, and potassium, which employs a sample diluted prior to analysis.

This method tends to result in errors in cases of hyperlipidemia or elevated concentrations of any or all of the lipids; such as, fatty, greasy, oily, and waxy compounds in the blood.

induced electricity
Electricity which is generated in a body from another body nearby without contact between them.
internal reference electrode
In chemistry, the metal electrode inside all chemical-sensing potentiometric (voltage-measuring) electrodes.

The references or sources of information for compiling the words and definitions in this unit are listed at this Electronic Bibliography page or specific sources are indicated when they are appropriate.

A cross reference of word units that are related, directly and/or indirectly, with "electricity": galvano-; hodo-; ion-; piezo-; -tron; volt; biomechatronics, info; mechatronics, info.