gamma radiation


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gam·ma ra·di·a·tion

ionizing electromagnetic radiation resulting from nuclear processes, such as radioactive decay or fission.

radiation

The combined processes of emission, transmission and absorption of highly energetic waves and particles on the electromagnetic spectrum treatment to kill cancer cells. See Acute radiation injury, Alpha radiation, Background radiation, Chemoradiation, Coherent radiation, Corpuscular radiation, Definitive radiation, Electromagnetic radiation, External radiation, Gamma radiation, Grenz radiation, Implant radiation, Internal radiation, Ionizing radiation, Non-ionizing radiation, Remnant radiation, Scattered radiation, Synchrotron radiation, Total body irradiation Clinical practice The direct, band-like extension of a sensation, in particular of pain, from a point of origin to another region of the body. Cf Referred pain Oncology The administration of ionizing radiation to kill malignant tumor cells. See Radiation fibrosis, Radiation therapy.
Radiation  
Alpha radiation 2 protons and 2 neutrons, eg plutonium, radon; α radiation travels 15 cm in air and is stopped by a piece of paper; proven role in soft tissue malignancy–see Radium Dial company, relationship with epithelial malignancy is uncertain; it is present in cigarette smoke and may have an additive effect to the known carcinogenic effect of tar; emitted by radium, thorium, uranium.
Beta radiation Electrons, eg strontium-90, tritium–3H; β radiation travels at the speed of light, is stopped by wood and thin metals and is carcinogenic to skin
Gamma radiation Gamma photon A quantum of electromagnetic radiation of ≤ 1 nm, which is generated by unstable nuclei eg 60Co; γ radiation is stopped by several feet of heavy concrete or 10-40 cm of lead and is linked to cancer, inducing mutations at the glycophorin A locus in survivors of atomic blasts; 183/105 excess deaths in survivors of the Hiroshima and Nagasaki blasts, with a 13-fold ↑ in non-lymphocytic leukemia–peaking at 6 yrs post-blast, thyroid nodules and tumors–peaking at 15-20 years post-blast and multiple myeloma 6-fold ↑–peaking 30 yrs post-blast

gam·ma ra·di·a·tion

(gam'ă rā'dē-ā'shŭn)
Ionizing electromagnetic radiation resulting from nuclear processes, such as radioactive decay or fission.

gamma radiation

Electromagnetic radiation of energy greater than several hundred thousand electron volts. With the development of very high voltage X-ray equipment there is now a technological overlap between X-ray and gamma radiation. Formerly, gamma was obtained only from decay of radioactive elements. Gamma radiation is highly penetrative and is valuable in RADIOTHERAPY.

gam·ma ra·di·a·tion

(gam'ă rā'dē-ā'shŭn)
Ionizing electromagnetic radiation resulting from nuclear processes, such as radioactive decay or fission.
References in periodicals archive ?
Sumartono, Degradation of Standard Dyes and Textile Wastewater as a Pollutant Model Using Gamma Radiation. At Indonesia J, 34, 1 (2008).
Yields of essential oils and curcuminoids: Gamma radiation had highly significant effects on the yields of essential oils and curcuminoids extracted from C.
For gamma radiation, the normal condition was defined as exposure to a dosage of 2.5 megarads; the worst-case condition was defined as exposure to 10 megarads.
Gamma radiation is often used to kill living organisms, in a process called irradiation.
Figure 9 depicts the TG mass loss and differential mass loss profiles of virgin and gamma radiation aged silicone rubber samples.
It has been reported that gamma radiation is a significant treatment that can increase the shelf life of tomatoes Gamma irradiation doses of 250,500 and 750 Gray have been compared with the control samples on 1st,8th and 13thday of irradiation preserved at 4,12 and 250C and found effective in combating theloss (Akhter and Khan 2012).).It has been reported that gamma radiation is a significant treatment that can increase the shelf life of vegetables and fruits tomatoes (Kumar et al, 2014, Wenwen et al., 2015).
At optimized conditions, > 94% degradation was achieved both in case of UV (exposure time 100 min, TiO2 concentration 5.93 g/L, H2O2 4.39%, pH 6.50 and shaking speed 110 rpm) and gamma radiation (12.69 kGy absorbed dose in the presence of 4.65% H2O2) treated samples and water quality parameters (WQP) also improved significantly.
Keywords: Grapes, Gamma radiation, shelf life and nutritional quality.
Since the late 1980s, ecological studies in many countries have linked large-scale geographic variations in the incidence of AL with variations in average radon and gamma radiation exposure on that scale.
On the other wise, treatment with oral silymarin extract against gamma radiation in this work efficiently trims down the elevated levels of serum biomarkers such as AST, ALT, ALP and GGT and these results in agreement with that of Naik et al.
Some studies have investigated the effects of gamma radiation on plants, including changes at the morphological, physiological and biochemical levels.