| Nuclear physics (29) |  |
| Nuclear reaction (15) | |
| Radiation (545) | |
| Radioactivity (103) | |
| Nuclear physics (29) | |
| Nuclear reaction (15) | |
| Radiation (545) | |
| Radioactivity (103) | |
Arizona, the Palo verde Nuclear power Plant is the world's only atomic power station not located adjacent to water.
Radioactive feral pigs are threatening Europe. Destroying crops, spreading diseases.""Once a wild pig is full-grown,
including radioactive elements like polonium-210. When the harvested leaves are cured and dried, compounds within them are converted into tobacco-specific nitrosamines (TSNAS), a class of well-known and intensely studied carcinogens.
who has worked on many volunteer computing projects at the at the European Particle physics Laboratory, Cern oe and who mentored, among others a young Tim Berners-Lee,
Wifi Makes Trees Sick City trees are becoming sick from wireless radiation from local area networks and mobile phones.
Radiation from Wi-fi networks is harmful to trees, causing significant variations in growth, as well as bleeding and fissures in the bark, according to a recent study in The netherlands.
Radiation from Wi-fi networks is harmful to trees, causing significant variations in growth, as well as bleeding and fissures in the bark, according to a recent study in The netherlands.
The study exposed 20 ash trees to various radiation sources for a period of three months.
The study also found that Wi-fi radiation could inhibit the growth of corn cobs. The researchers urged that further studies were needed to confirm the current results
and determine long-term effects of wireless radiation on trees. Via PC WORLD Share Thissubscribedel. icio. usfacebookredditstumbleupontechnorati a
They have established that radiation from mobile telephones is a key factor in the phenomenon and say that it probably interfering with the bees navigation senses.
We have compared the performance of honeybees in cellphone radiation exposed and unexposed colonies. oea significant decline in colony strength
just as nuclear physics was in the pre-Chernobyl days, when we were led to believe that nuclear power plants were completely safe.
Politically Charged Science No other branch of science is charged as politically. A religious war is raging between alarmists and skeptics,
#Fukushima grows sunflowers to clean up radiation contamination A geiger counter is placed in front of sunflowers in full bloom in Fukushima.
Burning strips of paper swirled into the hot summer sky as they carry the names of the dead above a temple in Fukushima where thousands of sunflowers have been planted to help fight the omnipresent radiation.
#Some 80,000 people were forced to evacuate from a vast swathe of land around the reactor as engineers battled radiation leaks,
Worse still, radiation spread well outside the mandatory evacuation zone, nestling in hot spots#and contaminating the ground in what remains a largely agricultural region.
Others face stringent tests and potentially harmful shipping bans after radioactive cesium was found in rice straw.
Excessive radiation levels have also been found in beef vegetables, milk, seafood and water and, in hot spots more than 100 km from the plant, tea.
In an effort to lift the spirits of area residents as well as lighten the impact of the radiation,
which are believed all to absorb radiation, #said the monk. So far we have grown at least 200,000 flowers (at this temple) and distributed many more seeds.
Sunflowers were used near Chernobyl after the 1986 nuclear accident there to extract radioactive cesium from contaminated ponds nearby.
Japanese scientists are also carrying out tests to prove their usefulness in fighting radiation. HOPE FROM STAGNATION But Abe decided not to wait for the results of the tests
me forget about radiation too, #said Tomoe, a 38-year-old volunteer who declined to give her last name.
hoping they would suck up radiation, #said Mura Akiba, a local villager weeding her garden. A dosimeter placed next to her registered radiation levels of more than 5 microsieverts per hour, far exceeding government safety levels.
Her house is located near a radioactive hot spot. Im so ashamed to go to a shop to buy fruit and vegetables
#I have done never this before in my life, #she added. But now I just stare at my blueberries
they confided to Abe their worries about radioactive contamination of the soil in their gardens.
and radiation to treat a rare form of leukemia that, several times in the preceding few years, had taken almost her life.
Dr. Ma then sent it to Dr. Anthony Kampf, Curator of Mineral Sciences at the Natural history Museum of Los angeles County (NHM), for X-ray diffraction study.
including a map of radiation levels in Japan for The Guardian. They are developing a Data science Toolkit for dealing with location data.
or zinc oxide to reflect UV radiation away from the body while organic ingredients such as octyl methoxycinnamate or oxybenzone convert the remaining UV rays into heat.
The end results are creams with varying SPFS (Sun Protection Factors) that keep the body protected from UV radiation.
Source: everydaymysteries 9.)Songs Stuck in our Heads Almost everyone has at one point or another had stuck a song in their head,
Baking acts by convection, rather than by thermal radiation, and is undertaken typically in ovens, in hot ashes,
which radiation is used to heat the polarized molecules in food. The microwave is notable mostly as a gateway technology, leading to the culinary innovation of the late 20th century:
as of this writing, is searching for an appropriate stretch to build the first tube. 1. Sustainable Fusion reactor Nuclear fission (the process by
which nuclear power plants produce energy) is much easier to control than nuclear fusion (the process by which the sun burns, and nuclear weapons work).
Small nuclear fusion reactors have been built, but a large-scale, sustainable fusion reactor has yet to be attempted#ntil now.
nuclear fusion is cleaner and yields three to four times more power than fission. The project is called ITER, for International Thermonuclear Experimental Reactor,
) Microwave radiation won t cause cancer, it just heats food up. In fact only a few types of radiation cause cancer,
and these depend on the dose#just like radiation from the sun can cause skin cancer but just enough helps your body make Vitamin d.
(SOURCE: Cancer Research UK). ) 33. It s a myth that Mcdonald s burgers don t rot. Actually they will rot given the right conditions#water and warmth for the microbes that break the food down.
What if there is a radiation leak? Do you send rodents into it? You can see the moral and ethical issues that need to be worked out.
and analyzing traffic patterns to reroute drivers-Waste management optimizing waste pickup by measuring container levels-Security & emergency detection detecting radiation, gases,
The 1990s to today As testing methods continued to improve researchers found that enzyme indicators on home pregnancy test strips could replace radioactive labels.
</p><p>George Gamow had predicted that a Big bang should produce just such a background radiation and the CMB became one of the first pieces of evidence supporting the Big bang theory.
</p><p></p><p>After about 400 million years of expansion following the Big bang the universe was cool enough for gravity to begin coalescing clouds of hydrogen into stars igniting nuclear fusion for the first time.
The prodigious outpouring of radiation from the first stars marked the end of the Dark Age
#Broccoli Compound Could Prevent Radiation Sickness A byproduct of a chemical found in broccoli could prevent acute radiation poisoning new research suggests.
and other cruciferous vegetables prevents rats exposed to lethal doses of radiation from dying. If follow-up studies show the treatment works in humans the compound could be given to people before
or right after nuclear exposure to mitigate acute radiation sickness. Insights from the research could also help to lessen the side effects of radiation therapy in cancer patients by making healthy cells
but not cancer cells less susceptible to damage from radiation said study co-author Dr. Eliot Rosen a radiation oncologist at Georgetown University in Washington D c. Top 10 Cancer-Fighting Foods Deadly effects
When people are exposed to high doses of radiation such as that resulting from a nuclear meltdown
Heavy radiation also strips the gastrointestinal tract making people prone to inflammation and infection. At high enough doses both ailments can be lethal.
whether these same properties might help shield cells from the DNA damage caused by radiation from a nuclear meltdown or a dirty bomb.
To find out the team exposed 40 rats to a dose of gamma-ray radiation that would normally be deadly
After 30 days animals typically will not die of acute radiation sickness; however the researchers didn't study the animals that long
 But in the case of a nuclear disaster you're not really worried about someone who is going to get cancer from the radiation 10 or 20 years down the line;
When it was given prior to radiation exposure the compound also shielded rats from radiation's effects.
More work In a second set of studies the team showed that human breast-cancer cells dosed with DIM were still susceptible to the effects of radiation raising the possibility that DIM could shield patients'healthy cells
while still allowing radiation to kill cancer cells. DIM's preferential effects in healthy tissue could reduce the side effects of radiation therapy.
It's a very interesting and surprising result because of the whole body protection from radiation said Gary Firestone a molecular biologist at the University of California Berkeley who studies DIM
Ultraviolet (UV) radiation has a higher energy level than visible light and infrared (IR) radiation has a weaker energy level.
Some of the sun's incoming radiation is absorbed by the atmosphere the oceans and the surface of the Earth.
Much of it however is reflected back out to space as low-energy IR radiation. For Earth's temperature to remain stable the amount of incoming solar radiation should be roughly equal to the amount of IR radiation leaving the atmosphere.
As Earth's atmosphere changes however the amount of IR radiation leaving the atmosphere also changes.
And since the Industrial revolution the burning of fossil fuels like coal oil and gasoline have increased greatly the amount of carbon dioxide (CO2) in the atmosphere according to NASA's Earth Observatory.
Along with other gases like methane and nitrous oxide CO2 acts like a blanket absorbing IR radiation and preventing it from leaving the atmosphere.
The net effect causes the gradual heating of Earth's atmosphere and surface. Related: Effects of Global Warming This is called the greenhouse effect
but weaker IR radiation isn't able to pass out through the glass. The trapped IR radiation keeps the greenhouse warm even in the coldest winter weather.
There are several gases in Earth's atmosphere known as greenhouse gases because they exacerbate the greenhouse effect:
Methane for example is about 21 times more effective at trapping heat from IR radiation than carbon dioxide according to the EPA.
Facts About the Nuclear Disaster In the early morning hours of April 26 1986 the Chernobyl nuclear power plant in Ukraine (formerly part of the Soviet union) exploded creating
Even after many years of scientific research and government investigation there are still many unanswered questions about the Chernobyl accident especially regarding the long-term health impacts that the massive radiation leak will have on those who were exposed.
and about 12 miles (20 km) south of the border with Belarus the four reactors at the Chernobyl Nuclear power Plant were designed
and to keep a continuous nuclear reaction occurring in the core. As the nuclear core heated
mechanisms according to the U n. Scientific Committee on the Effects of Atomic Radiation (UNSCEAR. At 1: 23 a m. on April 26 when extremely hot nuclear fuel rods were lowered into cooling water an immense amount of steam was created
which because of the RBMK reactors'design flaws created more reactivity in the nuclear core of reactor number 4. The resultant power surge caused an immense explosion that detached the 1000-ton plate covering the reactor core releasing radiation
and radiation leaks the death toll climbed as plant workers succumbed to acute radiation sickness.
Most of the radiation released from the failed nuclear reactor was from iodine-131 cesium-134 and cesium-137.
By that time many were already complaining about vomiting headaches and other signs of radiation sickness.
Twenty-eight of the workers at Chernobyl died in the four months following the accident according to the U s. Nuclear Regulatory Commission (NRC) including some heroic workers who knew they were exposing themselves to deadly levels of radiation
in order to secure the facility from further radiation leaks. The prevailing winds at the time of the accident were from the south and east so much of the radiation plume traveled northwest toward Belarus.
Nonetheless Soviet authorities were slow to release information about the severity of the disaster to the outside world.
But when radiation alarms began to go off at a nuclear plant in Sweden authorities were forced to reveal the full extent of the crisis. Within three months of the Chernobyl accident a total of 31 people died from radiation exposure or other direct
More than 6000 cases of thyroid cancer may eventually be linked to radiation exposure in Ukraine Belarus
Surprisingly the overall rate of cancer deaths and other health effects related to Chernobyl's radiation leak is lower than was feared initially.
The majority of the five million residents living in contaminated areas received very small radiation doses comparable to natural background levels (0. 1 rem per year) according to an NRC report.
Today the available evidence does not strongly connect the accident to radiation-induced increases of leukemia or solid cancer other than thyroid cancer.
Some experts have claimed that unsubstantiated fear of radiation poisoning led to greater suffering than the actual disaster.
or other disorders though the actual level of radiation exposure these women experienced were too low to cause any problems.
Shortly after the radiation leaks from Chernobyl occurred the trees in the woodlands surrounding the plant were killed by high levels of radiation.
The damaged reactor was sealed hastily in a concrete sarcophagus intended to contain the remaining radiation:
A few hundred former residents of the area have returned to their former homes despite the risks of radiation exposure.
Only a handful of radiation effects such as stunted trees growing in the zone of highest radiation
Because of the long-lived radiation in the region surrounding the former Chernobyl Nuclear power Plant the area won't be safe for human habitation for at least 20000 years.
#Cold war Nuclear Radiation Creates Anti-Poaching Tool (ISNS)--Radioactive carbon atoms created during 20th-century nuclear bomb tests could help save elephants
and other endangered species. A new study published in this week's issue of the journal of the Proceedings of the National Academy of Sciences shows that carbon-14 a radioactive version of the common carbon atom can be used to determine
Cretaceous period plants One of the hallmarks of the Cretaceous period was the development and radiation of the flowering plants.
 Based on levels of radioactive isotopes or atoms of the same elements with different molecular weights the team estimated that the site was occupied almost continuously between 9800 and 12000 years ago.
One 40â°K (0. 0118 percent) is radioactive with a half-life of 1. 28 x 109â years.
Despite its radioactivity potassium presents no significant hazard when handled. Sources of Potassium Potassium is the seventh most abundant metal in the world.
Everything that has a temperature--trees soil people the sun--emits radiation. Trees like other objects on the earth mainly emit long-wave infrared radiation
while sunlight contains a lot of shorter-wave radiation. In places where temperatures are already close to water's melting point the infrared energy can accelerate the melting of snow.
This work challenges conventional wisdom because most folks out there think of snowmelt as being dominated by short-wave radiation
But this paper shows that in warmer environments it really can be long-wave-radiation-dominated.
Each X-ray allows doctors to track the barium as the person digests the drink. By using a catheter running from the nose down to the throat doctors may also use a probe to monitor the amount of stomach acid in the esophagus in a technique called esophageal ph monitoring.
and water pollution solid waste radiation pesticides and toxic substances to name a few its authority on those matters is not exclusive.
Cosmic radiation constantly bombards the Earth's surface changing the form of some of the elements like beryllium in rocks.
which changes as the radioactive carbon-14 isotope breaks down over time while the stable carbon-12 does not.
and'60s spread a radioactive variety of carbon worldwide which was picked up by plants during photosynthesis
#Japan Scales Back Greenhouse Gas Reduction Goals Japan is slashing its greenhouse gas reduction goals in the wake of the Fukushima nuclear accident which has caused the country to replace its nuclear power with coal natural gas
All of the country's nuclear power plants are currently idle for scheduled maintenance checks and the new estimates rely on no nuclear power in the future.
Before the accident caused by the massive tsunami that inundated the coast in 2011 the country's sole plan for achieving greenhouse gas reductions focused on nuclear power.
Our government has been saying...that the 25 percent reduction target was unfounded totally and wasn't feasible government spokesman Chief Cabinet Secretary Yoshihide Suga said according to the BBC.
when a massive star runs out of fuel for nuclear fusion and collapses in on itself in a giant explosion.
Rosalind Franklin used the process of X-ray crystallography to make an image of the DNA molecule that was used by Watson
but X-ray crystallography is a bit complex for most students to do at home. Still some of you might want to do something a bit more dramatic than building a DNA model out of toothpicks and gumdrops.
The team then dated the structure using levels of radioactivity in minerals and the ratio of carbon isotopes or molecules of carbon with different numbers of neutrons from charcoal and grains of sand.
because they are so huge that a stray gamma ray could disrupt the bits in these numbers
X-ray analysis revealed gold particles up to about 8 microns wide in cells from the trees or about 10 times thinner than the average human hair.
The sun bombards Earth with enormous amounts of radiation which strike Earth's atmosphere in the form of visible light plus ultraviolet (UV) infrared (IR)
and other types of radiation that are invisible to the human eye. About 30 percent of the radiation striking the Earth is reflected back out to space by clouds ice and other reflective surfaces.
The remaining 70 percent is absorbed by the oceans the land and the atmosphere according to NASA.
As they absorb radiation and heat up the oceans land and atmosphere release heat in the form of IR thermal radiation
which passes out of the atmosphere into space. The balance between incoming and outgoing radiation keeps Earth's overall average temperature at about 59 F 15 C). This exchange of incoming and outgoing radiation that warms Earth is referred often to as the greenhouse effect because a greenhouse works in much
the same way. Incoming UV radiation easily passes through the glass walls of a greenhouse
and is absorbed by the plants and hard surfaces inside. Weaker IR radiation however has difficulty passing out through the glass walls
and is trapped inside warming the greenhouse. The gases in the atmosphere that absorb radiation are known as greenhouse gases (sometimes abbreviated as GHG)
because they are largely responsible for the greenhouse effect. The greenhouse effect in turn is one of the leading causes of global warming.
However methane is about 21 times more efficient at absorbing radiation than CO2 giving it a high GWP rating
and incoming radiation from the sun. Solar radiation passes through the atmosphere and is absorbed partially on the surface of Earth.
Some of the incoming radiation however is reflected back out toward space. Gases in Earth's atmosphere absorb some of that reflected radiation;
as a result the atmosphere heats up. This atmospheric warming is known as the greenhouse effect because the same process keeps a greenhouse warm during cold weather:
There's a delicate balancing act occurring every day all across the Earth involving the radiation the planet receives from space
and the radiation that's reflected back out to space. Earth is bombarded constantly with enormous amounts of radiation primarily from the sun. This solar radiation strikes the Earth's atmosphere in the form of visible light plus ultraviolet (UV) infrared (IR)
and other types of radiation that are invisible to the human eye. UV radiation has a shorter wavelength
and a higher energy level than visible light while IR radiation has a longer wavelength and a weaker energy level.
About 30 percent of the radiation striking Earth's atmosphere is reflected immediately back out to space by clouds ice snow sand and other reflective surfaces according to NASA.
The remaining 70 percent of incoming solar radiation is absorbed by the oceans the land and the atmosphere.
As they heat up the oceans land and atmosphere release heat in the form of IR thermal radiation
which passes out of the atmosphere and into space. It's this equilibrium of incoming and outgoing radiation that makes the Earth habitable with an average temperature of about 59 degrees Fahrenheit (15 degrees Celsius) according to NASA.
Without this atmospheric equilibrium Earth would be as cold and lifeless as its moon or as blazing hot as Venus. The moon
the average temperature on Venus is about 864 degrees F (462 degrees C). The exchange of incoming and outgoing radiation that warms the Earth is referred often to as the greenhouse effect because a greenhouse works in much the same way.
Incoming UV radiation easily passes through the glass walls of a greenhouse and is absorbed by the plants
Weaker IR radiation however has difficulty passing through the glass walls and is trapped inside thus warming the greenhouse.
but outgoing thermal radiation is trapped inside the car's closed windows. The gases in the atmosphere that absorb radiation are known as greenhouse gases
because they're largely responsible for the greenhouse effect. These greenhouse gases include water vapor carbon dioxide (CO2) methane nitrous oxide (N2o) and other gases according to the Environmental protection agency (EPA.
CO2 and other greenhouse gases act like a blanket absorbing IR radiation and preventing it from escaping into outer space.
During that time a space capsule wouldn't completely insulate life from bombardment with cosmic radiation zero air pressure and cold temperatures.
Earth-based experiments can't simulate all of those conditions particularly the heavy particle radiation he said.
and go into an extreme hibernation with zero metabolism he said thereby withstanding the punishing radiation desiccation and frigid temperatures of space.
which measures temperature based on thermal radiation at the tree trunks the koalas were hugging. The trunks were considerably cooler than the ambient air temperature sometimes by as
These calcium carbonate deposits which can take the form of cave popcorn (shown here) contain radioactive uranium.
That radioactive element provided a way for scientists to date the cave art. By dating the layer of popcorn on top of the art the scientists came up with a minimum age
The deposits contain tiny amounts of radioactive uranium which decays to thorium over time. By measuring the ratio of uranium to thorium in the layers of cave popcorn scientists can determine the minimum age of underlying artwork Aubert
After about 400 million years of expansion following the Big bang the universe was cool enough for gravity to begin coalescing clouds of hydrogen into stars igniting nuclear fusion for the first time The birth of the first stars marked a turning point in the life of the universe from that point forward the universe
Ligands in a cationic grip Using a number of techniques including the X ray crystallography beam at the Synchrotron in Melbourne they were able to describe the structure of the active component which only worked
Bark acts as the protective outer layer on trees that protects the plant from drought and shields against radiation.
which suggests the bad-quality cork trees are adapting to protect themselves from elevated radiation levels.
#Chernobyl Trees Barely Decomposed, Study Finds Almost 30 years ago the world's attention was fixed on Chernobyl the nuclear power plant in Ukraine that exploded in one of the world's worst nuclear disasters.
and Anders Møller of the Universitã Paris-Sud have made ongoing investigations into the biology of radioactive areas like Chernobyl and Fukushima Japan.
To find out what was happening or more accurately what wasn't happening the research team collected hundreds of samples of leaf litter from forest floors that were contaminated not by radiation
The degree of decay was proportional to the degree of radioactive contamination at each site according to the study published in the journal Oecologia.
Radiation is known to have harmful effects on microorganisms such as bacteria and fungi. Recent research has found that radiation therapy can cause severe complications in cancer patients by reducing the populations of helpful bacteria in the intestines.
How Radiation Affects the Human body Mousseau and other researchers are concerned that the buildup of leaf litter on the forest floor presents a real danger.
which could then spread radiation throughout the region. That would end up moving radiocesium and other contaminants via smoke into populated areas Mousseau said.
These pigments act like sunscreen for leaves blocking out damaging radiation and providing protection from excess light.
or particle physics, says Harry Collins, a sociologist of science at Cardiff University. In general, when scientific discoveries are made first they're messy and untidy,
Frank Postberg at the Max Planck Institute for Nuclear physics in Heidelberg, Germany, likes the ocean idea.
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