Sentences with phrase «ionizing radiation at»

Not exact matches

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.

At one extreme, the scientists estimated fly ash radiation in individuals» bones at around 18 millirems (thousandths of a rem, a unit for measuring doses of ionizing radiation) a yeaAt one extreme, the scientists estimated fly ash radiation in individuals» bones at around 18 millirems (thousandths of a rem, a unit for measuring doses of ionizing radiation) a yeaat around 18 millirems (thousandths of a rem, a unit for measuring doses of ionizing radiation) a year.

Charged particles striking Saturn's upper atmosphere ionize hydrogen atoms and produce infrared radiation, whereas related processes also give off Saturnian auroras at ultraviolet and radio wavelengths.

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.

In small amounts «they don't do you any harm, but they are very specific and the only thing that can cause them at a certain magnitude is ionizing radiation.»

Some environmental toxins such as cigarette smoke, ionizing radiation or some metals may contain large amounts of free radicals or encourage the body to produce more of them, according to the National Cancer Institute at the National Institutes of Health.

Dr. Su and her collaborators at University of Colorado, Boulder used ionizing radiation (IR) to induce DNA damage and apoptosis in cells of the wing imaginal disc, the immature form of the fly's wings.

As more stars and galaxies formed, they eventually generated enough radiation to flip hydrogen from neutral, a state in which hydrogen's electrons are bound to their nucleus, to ionized, in which the electrons are set free to recombine at random.

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.

Researchers at the Helmholtz Zentrum München now report the discovery of a very unexpected role for one such lncRNA, which they call PARTICLE, in regulating the response of cells to ionizing radiation.

The intense radiation from an AGN can ionize the gas around it (called photoionization), and this may be one mechanism at work in MAMMOTH - 1.

The gauntlet Juno ran at Jupiter held many chances for catastrophe: The spacecraft might have been knocked out by intense magnetic fields (at that distance, 20 times stronger than Earth's), ionizing radiation (a total dose of 265 rads — more than enough to kill a human being), dust particles from Jupiter's rings (from which the main engine was completely unshielded) or loss of power if the solar arrays were unable to reorient to the sun.

The team used several hundred thousand compute hours at NERSC to produce a series of 2D and 3D simulations that helped them examine the role of dark matter halo photoevaporation — where energetic radiation ionizes gas and causes it to disperse away from the halo — played not just in the early formation of stars but also the assembly of later galaxies.

«Photo - dissociation» or «Photon - dominated» Regions (PDRs) exist in the ISM at the interfaces between photo - ionized and molecular gas, where UV radiation sets the ionization state, chemistry, and excitation at the edge of the molecular zone.

Radiation exposure is just one cause of this scrambling (Shirley and others 1992, Gorbunova and Levy 1999) and at least 3,000 different mutant plant varieties created by intentional exposure to ionizing radiation are part of the existing food supply (IAEA 2008).

Examples of science projects enabled by the data in the High - Latitude Survey include: mapping the formation of cosmic structure in the first billion years after the Big Bang via the detection and characterization of over 10,000 galaxies at z > 8; finding over 2,000 QSOs at z > 7; quantifying the distribution of dark matter on intermediate and large scales through lensing in clusters and in the field; identifying the most extreme star - forming galaxies and shock - dominated systems at 1 < z < 2; carrying out a complete census of star - forming galaxies and the faint end of the QSO luminosity function at z ~ 2, including their contribution to the ionizing radiation; and determining the kinematics of stellar streams in the Local Group through proper motions.

Other factors include alcoholism, obesity, lack of physical exercise, ionizing radiation, hormone replacement therapy during menopause, early onset of menstruation and conceiving babies late or not at all.

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.

At the same time, large quantities of ionizing radiation will be released, further ionizing the gaseous components of the atmosphere at this heighAt the same time, large quantities of ionizing radiation will be released, further ionizing the gaseous components of the atmosphere at this heighat this height.