Sentences with phrase «on radiation doses»

The report also points out that RTZ's records on radiation doses show that before 1982 individual workers were exposed to more than the permissible doses in the final processing areas, where ore is roasted to recover uranium oxide.

Academic scientists face major obstacles as they try to collate baseline data on radiation doses in the face of the enormous disruption caused by the earthquake and tsunami that hit the country last month.

The impairments were not dependent on radiation dose.

It depends: The health physics society site is an excellent resource on radiation dose and effect: http://hps.Org/.

Ionizing radiation is a potent DNA damaging agent that interacts with cellular DNA and induces lesions in the irradiated cells and prevents cell proliferation and induces cell death by apoptosis or necrosis depending on the radiation dose.

Not exact matches

«There are no official dose limits for aircrew in the United States,» the US Centers for Disease control writes in its aircrew safety guidelines on cosmic radiation.

In fact, the National Council on Radiation Protection and Measurements reported in 2009 that air crews have, on average, the highest yearly dose of radiation out of all radiation - exposed workers in the US.

Japanese researchers are about to launch one of the most ambitious epidemiological studies ever attempted on the effects of low - dose radiation.

An extended stay on Mars, with its extremely thin atmosphere, would be lethal due to the high radiation doses, notwithstanding Matt Damon's successful Mars colonization in the movie «The Martian.»

Johns Hopkins scientists report that rats exposed to high - energy particles, simulating conditions astronauts would face on a long - term deep space mission, show lapses in attention and slower reaction times, even when the radiation exposure is in extremely low dose ranges.

Laboratory experiments on animals indicate that as doses decrease, less and less damage escapes DNA - repair mechanisms, says Yoshihisa Matsumoto, a radiation biologist at the Tokyo Institute of Technology.

The large number of abnormalities appearing so soon after the accident «would indicate that these children almost certainly received a very high dose of thyroid radiation from inhaled and ingested radioactive iodine,» antinuclear crusader Helen Caldicott wrote in a post on her homepage.

Although many say the report is well done, the exercise largely depended on modeling of radiation doses rather than on direct measurements of population exposures, and the data were often sub-optimal.

«Radiologists have had to rely on a trial - and - error approach to optimizing CT radiation dose.

«It is important for healthcare professionals (including referring physicians, radiologists, and technologists) to be aware of radiation dose levels and risks from imaging tests for several reasons, including the ability to weigh the risks and benefits of tests, counsel patients on relevant risks, optimize protocols to minimize radiation dose, and select appropriate protocols to minimize radiation dose.»

On the moon, they will have to move quickly — the radiation will hit within an hour of their learning of it, and doses could build up to an unacceptable level in three to four hours.

John Hemminger, a chemist from the University of California, Irvine, and chair of DOE's Basic Energy Sciences Advisory Committee, noted that within biological and environmental research, the Republican bill specifically favors research on biological systems, genomics, and the effects of low - dose radiation.

High - altitude flight exposes us to cosmic rays: the radiation dose on a flight from London to Tokyo is roughly equivalent to a chest X-ray.

«Chronic exposure to low - dose radiation at Chernobyl favors adaptation to oxidative stress,» is published in Functional Ecology on Friday 25 April 2014.

Substances are tested on a mature epidermis model by applying them to the surface of the epidermis and exposing the model to defined, but non-toxic, doses of UV radiation.

For more than a century, scientists have assumed your body reacts to that radiation in much the same way it does to high doses — only on a much smaller scale.

Compounds based on RK - 33, he says, might have value in treating a broad array of cancers that highly express DDX33 or as a supplement to radiation, making conventional doses more effective or improving the killing ability of lower doses.

These include the behaviour of the Italian government in the aftermath of Chernobyl, the basis of decision - making in civil nuclear power in Switzerland and France, and the controversy over the supposed effects of radiation doses to fathers on their offspring at Sellafield (a large case control study, which has recently been published, contradicts the views in the book), and the Black enquiry into childhood leukaemias in the vicinity of the plant.

Marine scientists have calculated that, based on all the radioactive particles released (or leaking) from Fukushima, a dose due to this most recent nuclear accident would add up to a total of roughly one microsievert (a unit of radiation exposure) of extra radiation — roughly one tenth the average daily dose most Americans experience, one fortieth the amount from a cross — North America flight and one one - hundredth the exposure from a dental x-ray.

From patient medical records, they obtained detailed information on treatments, which they used to estimate radiation doses to the stomach and to calculate the doses and types of chemotherapy that were used to treat the survivors» Hodgkin lymphoma.

Case Western Reserve research associate Amar Desai, PhD, worked between the Markowitz and Gerson laboratories to determine the effect of SW033291 on mice that had received lethal doses of radiation and then received a partial bone marrow transplant.

This challenge to the established LNT model and raises questions on some of the basic assumptions used to assess the risk of low dose radiation exposures.

In most of these cases, people received high radiation doses through drinking milk from cows that had grazed on iodine - contaminated pasture.

Depending on the dose and the target, radiation can cause incredible damage to healthy cells or it can be used to treat cancer and other diseases.

«I think the jury is still out on what low - dose radiation does in terms of reproductive health outcomes,» says Grajewski.

Knowing when such storms are coming helps protect astronauts as well as ground communications: Physicists estimate that a 1989 solar outburst released enough radiation to expose astronauts on the Mir space station to their yearly dose in just a few hours.

On Mars, however, the researchers calculate that dormant bugs could receive the necessary dose in just a few hundred thousand years, because radiation levels there are much higher.

A hardy microbe that can withstand huge doses of radiation could have evolved this ability on Mars.

Orthopaedic surgery and radiology collaborators have also implemented intraoperative use of low - dose protocols on fluoroscopy machines, which reduces radiation exposure to both patients as well as physicians and staff in the operating room.

Both sides of the planet may then be bombarded with radiation, he says: «So you may be sitting on the night side and still get a very high dose of these particles hitting you directly.

The British government's chief adviser on radiation is urging lower dose limits for workers and the public in the light of a recent review of the dangers posed by radiation.

Drugs can not reach the tissue at lethal doses because its blood supply is so poor, while radiation treatments depend on oxygen to trigger cell death.

It is based on the idea that any dose of radiation can be expressed as effective dose equivalent in terms of the natural background radiation we receive each year.

They studied mice and found their risk of mammary cancer from low - dose radiation depends a great deal on their genetic makeup.

High - dose radiation in space could be deadly for astronauts on a mission to planet Mars.

They abandoned a collective radiation dose limit when it was discovered that the Yucca site could not meet it, and, just last year, the EPA promulgated final standards for licensing Yucca Mountain that rely on dilution of nuclear waste as opposed to containment.

Berkeley Lab scientists studied mice and found their risk of mammary cancer from low - dose radiation depends a great deal on their genetic makeup.

The idea for a spinoff medical technology company originated several years ago when Medlin and his adviser, Endre Takacs, were working in Clemson's Atomic and Medical Physics lab on an experiment with bioengineers to systematically study the effects of low - dose radiation on living cell cultures.

This EU - funded programme links groups working on the response of stem cells to low doses of ionising radiation, such as found in medical imaging or nuclear accidents.

Each patient received three doses, separated by at least two days, of precisely targeted radiation therapy focused on each metastatic tumor.

A typical nuclear medicine procedure may impart a radiation dose to the patient comparable to about one to four years of natural background radiation depending on the type of study.1 As with X-rays, the value of diagnostic imaging is great and the risks are negligible compared to the health benefits of having the procedure.

The first of this week's review articles from the lab of Umberto Galderisi (Campania University, Naples, Italy) discusses the effects of low dose ionizing radiation (LDIR) on the biology of stem cell compartments.

His research concentrates on the long - term biological effects of low - dose radiation exposure.

When a person talks on a cell phone or looks at a smartphone display, the eyes receive a large dose of microwave radiation.

On a standard American diet, the amount of free radicals produced in the stool is quite remarkable, corresponding to that which would be produced by a fatal dose of gamma radiation.