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Topic: Ionizing radiation



  
 Ionizing radiation - Wikipedia, the free encyclopedia
The associations between ionizing radiation exposure and the development of cancer are mostly based on populations exposed to relatively high levels of ionizing radiation, such as Japanese atomic bomb survivors, and recipients of selected diagnostic or therapeutic medical procedures.
Because UV radiation, especially UV-C, exceeds the ionization energy of many of the elements, it is often considered ionizing radiation rather than non-ionizing radiation.
Ionizing radiation is a type of particle radiation in which an individual particle (for example, a photon, electron, or helium nucleus) carries enough energy to ionize an atom or molecule (that is, to completely remove an electron from its orbit).
http://en.wikipedia.org/wiki/Ionizing_radiation   (3455 words)

  
 An Introduction to Radiation Hormesis
That is, low-level ionizing radiation may be an essential trace energy for life, analogous to essential trace elements.
All living organisms evolved and exist in a sea of ionizing radiation, much of which is internal.
Despite the fact that high doses of ionizing radiation are detrimental, substantial data from both humans and experimental animals show that biologic functions are stimulated by low dose radiation (Luckey 1980).
http://www.angelfire.com/mo/radioadaptive/inthorm.html   (2662 words)

  
 Ionizing radiation - Wikipedia, the free encyclopedia
The associations between ionizing radiation exposure and the development of cancer are mostly based on populations exposed to relatively high levels of ionizing radiation, such as Japanese atomic bomb survivors, and recipients of selected diagnostic or therapeutic medical procedures.
Because UV radiation, especially UV-C, exceeds the ionization energy of many of the elements, it is often considered ionizing radiation rather than non-ionizing radiation.
Ionizing radiation is a type of particle radiation in which an individual particle, such as a photon, electron, or helium nucleus, carries enough energy to ionize an atom or molecule, that is, to completely remove an electron from its orbit.
http://en.wikipedia.org/wiki/Ionizing_radiation   (3616 words)

  
 Ionizing radiation
The associations between ionizing radiation exposure and the development of cancer are mostly based on populations exposed to relatively high levels of ionizing radiation (e.g., Japanese atomic bomb survivors, and recipients of selected diagnostic or therapeutic medical procedures).
Ionizing radiation is radiation in which an individual particle (for example, a photon, electron, or helium nucleus) carries enough energy to ionize an atom or molecule (that is, to completely remove an electron from its orbit).
Ionizing radiation is produced by radioactive decay, nuclear fission and nuclear fusion, extremely hot objects (thermal or blackbody radiation), and accelerated charges (bremsstrahlung, particle radiation, synchrotron radiation).
http://www.brainyencyclopedia.com/encyclopedia/i/io/ionizing_radiation.html   (3053 words)

  
 Radiation
For biologists, the most significant forms of radiation are light, heat, and ionizing radiation.
Ionizing radiation can penetrate cells and create ions in the cell contents.
About 27% of our annual exposure to radiation is from background radiation:
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/R/Radiation.html   (756 words)

  
 Radiation Safety Manual
Radiation (ionizing radiation) means alpha particles, beta particles, gamma rays, x-rays, neutrons, high-speed electrons, high-speed protons, and other particles capable of producing ions.
Ensure that all problems in the laboratory related to radiation safety are identified and corrected in a timely manner or as soon as identified as the result of an authorized survey.
All Authorized Users and Radiation Workers under their supervision who work with radioisotopes must receive instruction on radiation safety, biological effects of radiation, regulatory requirements, and laboratory techniques.
http://www.cdc.gov/od/ohs/manual/radman.htm   (12006 words)

  
 EPA - What is Radiation ? (EPA's Radiation Protection Program: Visitors' Center)
The most energetic form of radiation is called ionizing radiation.
This is similar to the way radiation exposure works.
There are three concepts in basic radiation protection.
http://www.epa.gov/radiation/students/what.html   (871 words)

  
 Radiation poisoning - Wikipedia, the free encyclopedia
The best prevention for radiation sickness is to minimize human exposure to high levels of ionizing radiation.
Radiation poisoning, also called "radiation sickness", is a form of damage to organic tissue due to excessive exposure to ionizing radiation.
Strictly speaking the correct name for "radiation sickness" is acute radiation syndrome.
http://en.wikipedia.org/wiki/Radiation_poisoning   (2660 words)

  
 Radiation therapy - Wikipedia, the free encyclopedia
Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis).
Radiation therapy is commonly applied to the gross tumor.
Radiation therapy is usually given daily, the dose depends primarily on tumor type, but many other factors such as whether radiation is given alone or with chemotherapy, before or after surgery, the success of surgery and its findings and many other reasons that are considered by the treating doctor (known as a radiation oncologist).
http://en.wikipedia.org/wiki/Radiation_therapy   (2775 words)

  
 Radiation therapy - Wikipedia, the free encyclopedia
Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis).
Radiation therapy is usually given daily, the dose depends primarily on tumor type, but many other factors such as whether radiation is given alone or with chemotherapy, before or after surgery, the success of surgery and its findings and many other reasons that are considered by the treating doctor (known as a radiation oncologist).
Radiation therapy is commonly applied just to the localised area involved with the tumor.
http://en.wikipedia.org/wiki/Radiation_therapy   (2544 words)

  
 National Cancer Institute - Radiation Therapy for Cancer: Q & A
Radiation therapy (also called radiotherapy, x-ray therapy, or irradiation) is the use of a certain type of energy (called ionizing radiation) to kill cancer cells and shrink tumors.
Combined modality therapy, the use of radiation with drug therapy, is commonly used.
Radiation therapy may be used alone or in combination with other cancer treatments, such as chemotherapy or surgery.
http://www.cancer.gov/cancertopics/factsheet/Therapy/radiation   (3920 words)

  
 MedlinePlus Medical Encyclopedia: Radiation sickness
Ionizing radiation is radiation that produces immediate chemical effects (ionization) on human tissue.
Radiation sickness results when humans (or other animals) are exposed to excessive doses of ionizing radiation.
Exposure may be accidental or intentional (as in radiation therapy).
http://www.nlm.nih.gov/medlineplus/ency/article/000026.htm   (735 words)

  
 An Introduction to Radiation Hormesis
That is, low-level ionizing radiation may be an essential trace energy for life, analogous to essential trace elements.
All living organisms evolved and exist in a sea of ionizing radiation, much of which is internal.
It is widely believed that radiation biology in the future will be focused on biomolecular and genetic implications, problems of damage and repair and connected problems such as radiation hormesis and radioadaptive response.
http://www.angelfire.com/mo/radioadaptive/inthorm.html   (2662 words)

  
 MedlinePlus Medical Encyclopedia: Radiation sickness
Radiation sickness results when humans (or other animals) are exposed to excessive doses of ionizing radiation.
Ionizing radiation is radiation that produces immediate chemical effects (ionization) on human tissue.
Exposure may be accidental or intentional (as in radiation therapy).
http://www.nlm.nih.gov/medlineplus/ency/article/000026.htm   (735 words)

  
 Radiation poisoning - Wikipedia, the free encyclopedia
The best prevention for radiation sickness is to minimize human exposure to high levels of ionizing radiation.
Radiation poisoning, also called "radiation sickness", is a form of damage to organic tissue due to excessive exposure to ionizing radiation.
However, since tumors themselves grow by abnormally rapid cell division, the ability of radiation to disturb cell division is also used to treat cancer (see radiotherapy), and low levels of ionizing radiation have been claimed to lower one's risk of cancer (see hormesis).
http://en.wikipedia.org/wiki/Radiation_poisoning   (1982 words)

  
 Madeline Felkins Hotsheets: Radiation Poisoning, Cancers, Human Radiation Experiments, Autoimmune Diseases and Disorders
CIA, Radiation Sickness or Death Caused by Surreptitious Administration of Ionizing Radiation to An Individual
DOD, Final Report: Survey of Current Literature on Effects of Ionizing Radiations on Chemical and Cellular Systems as These Pertain to an Understanding of the Basic Biological and Biochemical Effects of Ionizing Radiations, June 1, 1954 - May 15, 1956.
Madeline Felkins Hotsheets: Radiation Poisoning, Cancers, Human Radiation Experiments, Autoimmune Diseases and Disorders
http://www.geocities.com/madelinefelkins/radpoison.htm   (716 words)

  
 CDC Radiation Emergencies Glossary of Radiological Terms
When ionizing radiation passes through the tube, a short, intense pulse of current passes from the negative electrode to the positive electrode and is measured or counted.
Local radiation injury invariably involves skin damage, and a skin graft or other surgery may be required.
Whole body exposure: an exposure of the body to radiation, in which the entire body, rather than an isolated part, is irradiated by an external source.
http://www.bt.cdc.gov/radiation/glossary.asp   (6808 words)

  
 Radiation Poisoning
All studies have shown that the principle effect of ionizing radiation is cancer induction.
There is a term in medicine pertaining to acute radiation poisoning called "anastasis", which is a feeling of well being for a few days (after being sick), followed by sickness again.
There is an increased cancer risk from diagnostic procedures, but generally the benefit from the procedure always outweighs the radiation risks.
http://www.pahealthsystems.com/message140728.html   (4370 words)

  
 Radiation Therapy
According to the National Cancer Institute, "Radiation therapy is the treatment of cancer and other diseases with ionizing radiation.
Radiation Therapists provide the patient and their family with in-depth and continuous care, support, and counselling throughout the treatment process.
Because radiation treatments often extend over several weeks, a special supportive relationship often develops between the therapist, the patient and the patient's family.
http://www.michener.ca/radsci/radther/radther.php   (704 words)

  
 Radiation
For biologists, the most significant forms of radiation are light, heat, and ionizing radiation.
Ionizing radiation can penetrate cells and create ions in the cell contents.
Causes radiation sickness (when absorbed in a short period)
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/R/Radiation.html   (756 words)

  
 The Why Files 1. Radiation, 60 years later
CT scans are a valuable medical tool, but they increase our exposure to ionizing radiation.
First, some definitions: Ionizing radiation -- alpha and beta particles, and X-rays and gamma rays -- is released by nuclear reactions in bombs, power plants and uranium-bearing rocks (X-rays are also made in medical equipment).
While we know large doses of ionizing radiation can cause disease or kill, the health impact of lower doses is more elusive.
http://whyfiles.org/020radiation   (408 words)

  
 Effect Of Radiation
"> RADIATION HORMESIS Biopositive Effect of Radiations 1 - Introduction 2 - Development of the Hormesis Concept 3 - Acute expozure to ionizing radiation 4 - Chronic Exposure to Ionizing Radiation...
This law has been referred to in many ways, for example: cause and effect, radiation and magnetization, like attracts like, inbreath and outbreath, ebb and flow, reaping what we sow, casting our...
side-effects of many kinds of chemotherapy and radiation treatment and simultaneously contribute to...
http://www.radiationweb.com/EffectOfRadiation   (408 words)

  
 Mobile Phones & Health Report. Radiation Protection for Mobile Phone users
Indeed, sunlight itself is part of the electromagnetic spectrum and, as our chart shows, acts as the divide between non-ionizing energy, which can cause heating and ionizing energy which can cause molecular change.
Mobile phones operate firmly within the non-ionizing part of the spectrum.
Cell phone radiation and the health risk associated with cell phone use is real.
http://safecell.net/reports10.html   (923 words)

  
 EPA - Health Effects (EPA's Radiation Protection Program: Understanding Radiation)
The most common forms of ionizing radiation are alpha and beta particles, or gamma and X-rays.
Both the type of radiation to which the person is exposed and the pathway by which they are exposed influence health effects.
To give you an idea of the usual rate of exposure, most people receive about 3 tenths of a rem (300 mrem) every year from natural background sources of radiation (mostly radon).
http://www.epa.gov/radiation/understand/health_effects.htm   (1647 words)

  
 Radiation Control - Minnesota Dept. of Health
Ionizing radiation can be instrumental in the improvement of health, welfare, and productivity of the public if properly used, and may impair the health of people and the industrial and agricultural potentials of the state if improperly used.
Daily, we are all exposed to low levels of ionization radiation through natural background or cosmic radiation, diagnostic and therapeutic medical applications, radioactive materials, the build-up of radon in some buildings, industrial applications, and nuclear power plants.
While the United States Nuclear Regulatory Commission regulates nuclear power plants and most radioactive materials, Minnesota's Radiation Control program is responsible for regulating machine produced sources of radiation to which the public may be exposed.
http://www.health.state.mn.us/divs/eh/radiation   (218 words)

  
 Radiation Safety Committee
Develop and promulgate policies and procedures regarding ionizing radiation safety within the university;
Investigate alleged infractions of safety rules or improper use of ionizing radiation sources brought to its attention by the radiation safety officer or other
Ensure that all state and federal requirements and standards are met under the university's license regarding ionizing radiation sources and that proper
http://www.niu.edu/u_council/commbook/radiationsafety.htm   (218 words)

  
 Refractive index change induced by ionizing radiation - A. Fernandez Fernandez
The measurement of the refractive index change due to gamma radiation is important for the use of photonic technology in ionizing radiation environments.
studied the gamma radiation effects on a fused wavelength-division-multiplexing (WDM) coupler 1.300/1.500 nm and suggested that the change of refractive index in the fiber was the cause for the degradation of this device [17].
Therefore, to investigate the refractive index changes during irradiation, we rely on fused fiber couplers manufactured with the optical fiber of interest.
http://www.sckcen.be/people/affernandez/refindex.html   (1983 words)

  
 "Ask the Experts" Category: Radiation Effects
Tumor Induction in the Extremities and Exposure to Ionizing Radiation
Tissue that has been subjected to therapeutic radiation
Do senior citizens or infants face greater health risks from radiation?
http://hps.org/publicinformation/ate/cat25.html   (354 words)

  
 1
"With regard to ionizing radiation, an adaptive response has been observed in single cells as well as in the entire organism.
Such an adaptive response has been noted after exposure to a variety of stressors such as ionizing radiation, radiomimetic chemicals, oxidative agents, alkylating compounds, or heat, but most of the information on the presence and the mechanisms of the adaptive response has been gathered for radiation exposure.
France: Academy of Medicine; Dec 4, 2001 Statement on Radiation Health Effects
http://cnts.wpi.edu/rsh/dd3/3.0Stecca98.html   (897 words)

  
 rat haus reality: the health costs of low-level ionizing radiation
the health costs of man-made low-level ionizing radiation.
His work has already changed the way the world views the dangers of radiation, and his latest book [Radiation from Medical Procedures] will -- eventually, after a long fight -- revolutionize the way the world looks at medical radiation.
Nuclear Radiation and its Biological Effects, an essential lay-person's primer
http://www.ratical.org/radiation   (413 words)

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