Sentences with phrase «ionizing radiation»

Such investigations are supported by the space experiment on permanent monitoring of the factors controlling heliogeomagnetic activity, i.e., fluxes of ionizing radiation of the Sun and fluxes of electrons precipitating from the radiation belts.

The long burial may have shielded them from ionizing radiation from space that could destroy organic molecules near the surface.

The technology is safe and does not use ionizing radiation as for x-rays, but instead uses the conversion of high frequency sound waves to make images of the patient.

The health effects of ionizing radiation in the form of gamma - rays,...

Here's a chart (click to enlarge) comparing ionizing radiation doses from a host of different activities and sources, ranging from eating a banana to living in Denver:

Secondary electrons are the most important species created by ionizing radiation in living tissue.

Performed a variety of technical procedures applying ionizing radiation for radiological diagnosis.

Using spectral readings from telescopes at the Keck Observatory in Hawaii, Hand has found high levels of oxidative chemicals such as sulfate, oxygen, sulfur dioxide and hydrogen peroxide on Europa's surface, which are produced as ionizing radiation from Jupiter scours it, splitting apart water molecules and sulfur compounds in the uppermost layers of its ice.

«New measurements to guide radiation therapy: Data provide insights into effects of ionizing radiation on living cells.»

Many studies of this problem focus on ionizing radiation such as x-rays and gamma - rays.

Irradiation is the process of applying ionizing radiation to food.

When ionizing radiation passes through living tissue, it interacts with molecules present in the cells, stripping away electrons and producing charged species known as ions.

If you don't have breast cancer when you start screening with mammograms, you probably will years later after all that cumulative ionizing radiation exposure!

Ionizing radiation damages cells by producing very reactive compounds known as free radicals.

Exposure of tumor cells to clinically relevant low doses of ionizing radiation causes DNA damage and the generation of reactive oxygen species (ROS).

As I understand things (and this is NOT my field at all) there is a robust dispute over how sure we can be about what ionizing radiation dose to human health at small doses.

During balloon flights he and other physicists carried electroscopes to high altitudes with the goal of measuring ionizing radiation in the atmosphere.

Once in place, the radioactive molecules produce ionizing radiation inside or close to cancer cells.

It is the world's only company producing PPE intended to protect users from high energy ionizing radiation and the first to employ selective shielding in its products.

The National Academy of Sciences takes a stronger stance, concluding that any amount of ionizing radiation increases cancer risk, but radiation biologist Jacqueline Williams, who works at University of Rochester Medical Center, told the AP the risk is minimal:

Any injury caused by, contributed to, or arising from nuclear ionizing radiation or contamination by radioactivity from any nuclear fuel or from any nuclear waste or from the combustion of nuclear fuel (including any self - sustaining process of nuclear fission) or nuclear weapons material or nuclear equipment or any part of that equipment

Also called cosmic rays or cosmic ionizing radiation, the particles are the cores of atoms, such as iron and nickel, moving at nearly light - speed.

Can we build a machine that will work after 71,000 years in space, including millennia of intense ionizing radiation?

The detector developed at UNH, known as DoSEN, short for Dose Spectra from Energetic Particles and Neutrons, measures and calculates the absorbed dose in matter and tissue resulting from the exposure to indirect and direct ionizing radiation, which can change cells at the atomic level and lead to irreparable damage.

(A sievert is a unit of ionizing radiation equal to 100 rems; a rem is a dosage unit of x-ray and gamma - ray radiation exposure.)

But little is known about how ionizing radiation affects the extracellular matrix (ECM), a patchwork of proteins and other biomolecules that surrounds cells and plays a vital role in their shape, movement and signaling functions.

«Ionizing radiation found to soften tumor cell microenvironment: When irradiated, less stiff extracellular matrices reduced cancer growth and migration, bolstering the case to further understand fractionated radiation therapy.»

Computed tomography (CT) scans are an invaluable diagnostic tool in modern medicine, but they do come at a price: exposing patients to potentially dangerous ionizing radiation.

MRIs and ultrasounds do not employ ionizing radiation and yet 20 % of physicians, 6 % of radiologists, and 7 % of technologists attributed radiation exposure to MRIs and 11 % of physicians, 0 % of radiologists, and 7 % of technologists believed an ultrasound used radiation.

But a study in tomorrow's Proceedings of the National Academy of Sciences suggests ionizing radiation can stir up chemical changes in cytoplasm that lead to DNA damage.

For most people, the risk of absorbing excess ionizing radiation comes mainly through breathing radon, a gas released by uranium and thorium in soils.

A dosimeter that measures exposure to ionizing radiation via the teeth is the furthest along.

Yet without a protective magnetic field to shield the surface, ionizing radiation started splitting water molecules into hydrogen and oxygen.

Biophysical studies have shown that the damage arising to cells from an exposure to ionizing radiation declines in a linearly manner with decreasing dose, with some damage still occurring even at the lowest doses.

But biologist Ronald Mitchel of Atomic Energy of Canada has shown that a single low dose of ionizing radiation stimulates DNA repair, delaying the onset of cancer in mice; high doses produced the opposite effect, as expected.

Five had been exposed to ionizing radiation earlier in their lives.

There is general recognition that procedural ionizing radiation doses should be kept as low as reasonably achievable.

Considerable previous research in cell cultures has demonstrated that low doses of ionizing radiation results in «bystander» effects, in which nearby, unexposed tissues suffer cell death, mutations, and tumor - inducing growth (ScienceNOW, 7 September 2005).

Tim Mousseau is part of a team researching the effects of ionizing radiation there under real - world, rather than laboratory, conditions.

The current model for predicting cancer risk from ionizing radiation holds that risk is directly proportional to dose.

Presentation title: Monte Carlo simulation of early biological damage induced by ionizing radiation at the DNA scale: overview of the Geant4 - DNA project

Laboratory experiments also demonstrate that atomic addition reactions — similar to those assumed to occur in interstellar clouds — play a role in synthesizing complex molecules by subjecting ices containing simpler molecules such as water, carbon dioxide, and methanol to ionizing radiation dosages.

Alternatively, EGSY8p7 may be the first example of an early generation which unusually strong ionizing radiation.

It has been reported that the activation of AKT involves ionizing radiation induction of p53 [44].