Sentences with phrase «radiation limits of»

Guidelines from the International Radiation Protection Association (IRPA) suggest overall radiation limits of 1 milliwatt per square centimeter «averaged over 6 minutes (0.1 h) period.»

Not exact matches

The reports, along with earlier research show that current limits for mobile phone radiation, «remain acceptable for protecting the public health,» Jeffrey Shuren, director of the FDA's Center for Devices and Radiological Health, said in an emailed statement.

Its ordinarily limited radioactivity makes plutonium safe for terrorists or other thieves to transport with little risk of radiation injury.

Some weeks later, after radiation therapy that was designed to limit the extent of the surgery, he wrote to tell me that the doctors were astounded to learn that the tumor had been stopped cold by the radiation and that surgery would not be required.

A year after writing The Mass on the World, Pere Teilhard further defined his thought, in Mon Univers: «To interpret adequately the fundamental position of the Eucharist in the economy of the world... it is, I think, necessary that Christian thought and Christian prayer should give great importance to the real and physical extensions of the eucharistic Presence... As we properly use the term «our bodies» to signify the localized centre of our spiritual radiations..., so it must be said that in its initial and primary meaning the term «Body of Christ» is limited, in this context, to the consecrated species of Bread and Wine.

Along the way, according to a 2013 study, you'd get dosed with the radiation equivalent of a whole - body CT scan every five to six days, increasing your lifetime cancer risk above the limits set by NASA.

Enormous clouds of these tiny grains scatter and absorb some of the radiation emitted from the stars — especially visible light — limiting what can be seen by telescopes here on Earth.

Because synchrotron radiation is one of only a limited number of phenomena that can create polarized light, these data provided the crucial link between synchrotron radiation and the prompt phase of GRB160625B.

The crops were harvested on 16 May, and contained low levels of radiation — around 9 becquerels per kilogram (Bq kg - 1; wet weight), much lower than the 500 Bq kg - 1 safety limit for human consumption.

Fairén says there is growing evidence that the harsh environment on the martian surface — a combination of frigid temperatures, caustic chemicals and deadly cosmic radiation — would kill Earth's microbes quickly, especially in the limited numbers that ride along with robots.

In fact, it is the accumulation of radiation dose that is the limiting factor for the maximum length of manned space flights.

When astronauts are outside of Earth's magnetic field, spaceships provide only limited shielding from radiation exposure, explains study leader Robert D. Hienz, Ph.D., an associate professor of behavioral biology at the Johns Hopkins University School of Medicine.

«It was nowhere near as complex of a release as Chernobyl, which was everything from the core of the reactor,» says Peter Caracappa, a radiation safety officer and clinical assistant professor of nuclear engineering at Rensselaer Polytechnic Institute in Troy, N.Y. «This was a slow release,» he adds, and it was limited to a few radioactive materials, including iodine 131, which has a half - life of just eight days and therefore does not lead to long - term contamination.

And space physicians still need to find ways to limit other hazards of human spaceflight that don't have anything to do with weightlessness, such as disturbed sleep and exposure to cosmic radiation.

This summer, Ronald Herberman, director of the University of Pittsburgh Cancer Institute, sent a memo to staffers warning them to limit their cell phone use and to use hands - free sets in the wake of «growing evidence that we should reduce exposure» to cell phone radiation.

The X-ray data also indicates that radiation from material surrounding this black hole has consistently surpassed the so - called Eddington limit, defined by a balance between the outward pressure of radiation from the hot gas and the inward pull of the gravity of the black hole.

The study was a randomized phase II trial testing whether the addition of local treatment, in the form of consolidative radiation therapy, to the standard treatment of systemic therapy improved progression - free survival for patients with limited metastatic NSCLC.

«There is a significant possibility that local therapy, such as consolidative radiation, may become an important part of the management of limited metastatic NSCLC patients, but this validation must take place in randomized phase III studies.

In extreme cases, the application of X-rays is limited by these side effects, known as «radiation damage».

Combining radiation therapy with chemotherapy for patients with limited metastatic non-small cell lung cancer (NSCLC) may curb disease progression dramatically when compared to NSCLC patients who only receive chemotherapy, according to a new randomized phase II clinical trial reported today at the 59th Annual Meeting of the American Society for Radiation Oncology (ASTRO).

By far the most rigorously researched of the Tintin stories, it features nuclear fission, the effects of gravitation in space and why meteorites make lunar craters, as well as side references in Professor Calculus's log book to the «constant of solar radiation» and the «limits of the solar spectrum in the ultraviolet».

«Adding radiation to chemotherapy may dramatically improve survival for advanced NSCLC: Randomized phase II trial finds progression - free survival expectancy nearly tripled with addition of consolidative stereotactic radiation therapy for limited metastatic disease.»

«Drug could limit spread of deadly brain tumors: Study shows PPF could help treat glioblastomas by sensitizing tumors to chemotherapy, radiation treatments.»

Soot particles, also known as black carbon aerosols, affect climate by absorbing sunlight, which warms the surrounding air and limits the amount of solar radiation that reaches the ground.

There has been a decrease in side effects due to the development of better treatments, limiting the use of radiation.

«Setting [such radiation limits] for elementary schools is inexcusable,» Toshiso Kosako, a radiation health expert at the University of Tokyo, said on 30 April, when he resigned as an adviser to Prime Minister Naoto Kan on the nuclear crisis.

Because children are known to be more susceptible than adults to risks of cancer from radiation, Physicians for Social Responsibility, a U.S. antinuclear proliferation group, condemned the exposure limit as «unconscionable.»

This transfer of energy between particles with different speed limits is called Cherenkov radiation, and it makes the reactor pools of nuclear power stations glow with a bluish light.

Wade Allison produces a good argument for drastically raising the limits on the amount of radiation to which people can...

The rats in the study were exposed to a range of radiation intensities, but most of these were higher than those permitted by the current safety limits that are imposed on mobile phone manufacturers.

This limits the amount of radiation in the innermost of two radiation belts that surround Earth.

In any case, once a woman declares her pregnancy, any institution is legally required to ensure that the fetus is limited to a radiation exposure of 0.5 rem, according to Robert Zoon, a radiation safety officer at the National Institutes of Health (NIH).

Significantly, the effect of PARTICLE in limiting the time and extent of the radiation - induced increase in DNA methylation is more pronounced at lower radiation doses than at higher doses.

To limit inherent systematic uncertainties, Ghez's group accounted for overlapping light sources when one star passes in front of another or near the black hole itself, where infalling material emits radiation.

In addition to the potential passenger dangers, he says that pilots could only fly a limited number of flights to prevent overexposure to nuclear radiation, noting that after a few flights, they would have been exposed to far more radiation than nuclear power plant workers.

For all these precautions, radiation is still the limiting factor of the $ 1.1 - billion mission — and, indeed, the reason that no such mission has been attempted before.

While ultrasound provides a less expensive and radiation - free alternative to detecting and monitoring cancer compared to technologies such as X-rays, CT scans and MRIs, the lower clarity and resolution of ultrasound has limited its use in cancer treatment.

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.

Such safety limits are based on long - term consumption of these foods, says William McCarthy, deputy director of the radiation protection program within the Environment, Health and Safety Office at the Massachusetts Institute of Technology (MIT) in Cambridge.

The first independent studies of Japan's worst nuclear accident, which has already caused the death of two workers from multiple organ failure, also suggest that radiation doses outside the 350 - metre evacuation zone breached the safety limit.

One of the main reasons for limiting the operating lifetimes of nuclear reactors is that metals exposed to the strong radiation environment near the reactor core become porous and brittle, which can lead to cracking and failure.

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.

The observations also showed that radiation from the black hole was consistently near or above the Eddington limit, the point of balance between the force of outward radiation from the hot gases inside and the gravitation force acting inward.

St. Louis County had previously said that it would be collaborating with the ATSDR on a health study focused on a limited number of cancers known to be associated with exposure to low levels of ionizing radiation.

Radiation - induced pulmonary fibrosis — tissue scarring that can permanently impair lung function — limits the delivery of therapeutic radiation doses to non-small cell lung cancer.

Stereotactic radiotherapy destroys tumors with precise, very intense doses of radiation while limiting damage to healthy tissue, offering accuracy that is similar to the sharpness of a surgeon's knife.

Breaking the supermassive black hole speed limit — Using computer codes for modeling the interaction of matter and radiation related to the Lab's stockpile stewardship mission, scientists simulated collapsing stars that resulted in supermassive black holes forming in less time than expected, cosmologically speaking — in the first billion years of the universe.

In addition to the radiation pressure, the winds that so massive a star generates disperse its natal cloud, further limiting its growth as well as interfering with the formation of nearby stars.»

Data from the 1960s indicates the inner limit of the Van Allen radiation belt used to be far closer to Earth, when the use of VLF was more limited.

December 13, 2011 Molecular markers can predict spread of cancer, guide treatment Molecular markers found in cancer cells that have spread from a primary tumor to a limited number of distant sites can help physicians predict which patients with metastatic cancer will benefit from aggressive, targeted radiation therapy.