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Related to Irradiation: gamma irradiation, Blood Irradiation


Subjection of a biological system to sound waves of sufficient intensity to modify their structure or function.
The exposure of a material, object, or patient to x-rays, gamma rays, ultraviolet rays, or other ionizing radiation.
An optical illusion which makes bright objects appear larger than they really are.



in physiology, the spread of excitation or inhibition in the central nervous system. Irradiation plays an important part in cerebrocortical activity. The irradiation of excitation is manifested most distinctly after strong stimulation, when nerve centers usually not involved in a reflex response are drawn into the process. For example, moderate pain inflicted on the skin of an animal’s foot causes the paw to flex in the talocalcaneal joint. Increasing the force of stimulation causes the leg to flex in the knee and hip joints. In studying the effect of an inhibitory conditioned stimulus, I. P. Pavlov showed that inhibition can also spread (irradiate) in the cells of the cerebral cortex.



the apparent enlargement of the dimensions of white (light) objects against a black (dark) background (given the comparatively great brightness of the white object) or, conversely, the apparent diminution of the dimensions of black objects against a white background. (The first instance is called positive irradiation; the second, negative.)

As a result of irradiation, a thin black thread or wire observed against a bright flame seems to be interrupted in that segment, and the bright crescent of the new moon seems to have a larger diameter than the ash-gray disk of the moon seen simultaneously with it. The degree of irradiation increases when the brightness of the light background or object increases. Irradiation is caused by optical defects of the eye (spherical and chromatic aberrations), diffraction phenomena in the eye, and imperfect fixation of the eye on the objects observed.


Kravkov, S. V. Glaz i ego rabota: Psikhofiziologiia zreniia, gigiena osvesh-cheniia, 4th ed. Moscow-Leningrad, 1950. (Includes bibliography.)
References in periodicals archive ?
Particle therapy systems generally offer one irradiation nozzle in one treatment room.
Pakistan could earn huge foreign exchange through value addition of precious stones with Gamma Irradiation Technology.
Irradiation at 6 kGy eliminated most of the spoilage microorganisms and did not affect the sensory quality of the samples.
developed a new nylon molding compound by mixing Nylon66 with a cross-linking agent and fabricated lenses by molding the mixture followed EB irradiation [17]; they successfully obtained a cross-linked and thermally stable molding made from Nylon66.
Provide requirements for the irradiation of food consistent with current standards and practices
Factors Generating Interest in Food Irradiation Services 7
They biopsied suspicious MRI findings to confirm pathology and then prospectively recorded whether MRI findings prompted a change in the eligibility for partial breast irradiation according to the entry criteria outlined in NSABP B-39.
2010) reported that irradiation of 1 kGy for sliced cheese and 3 kGy for pizza cheese were sufficient to lower the total aerobic bacteria to undetectable level.
Survivors who were treated with abdominal irradiation were 2.
food irradiation trends and issues continue, so will the adoption by the industry and its consumers.
If irradiation is safe, then there should be no need to hide the process.
Irradiation in the world of fresh produce is still something new, and it's opening the door to American imports of litchi (a red fruit similar to a grape) and longan (a round fruit resembling an eyeball when shelled) from Thailand as well as new mangoes from India.