Physicists have long held the view that the rate of breakdown - or decay - for any given radioactive substance is constant.
The German chemical giant BASF is working on a toothpaste that will not only resist tooth decay--the familiar ad slogan--but reverse it by rebuilding tooth enamel.
Left untreated, what's termed "early dental caries" -- the first stage of tooth decay -- can destroy tiny teeth and lead to infection, pain, and lifelong consequences.
The British Dental Association (BDA) accredits toothpastes which demonstrate dental health benefits - such as reduced decay and healthier gums - to an independent panel of experts.
Meanwhile, the separate dental survey of five-year-olds confirms 41% of children in Wales experienced dental decay in 2010-11.
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Unlike archaeological radiocarbon dating based on the fixed rate of decay of the carbon-14 isotope, there is simply no fixed rate of decay of basic vocabulary, which would allow us to date ancestral proto-languages.
Checking data collected at Brookhaven National Laboratory on Long Island and the Federal Physical and Technical Institute in Germany, they came across something even more surprising: long-term observation of the decay rate of silicon-32 and radium-226 seemed to show a small seasonal variation.
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But as that hope faded and the need to remove the steadily-decreasing decay heat remained, operators at Fukushima-Daiichi took measures that would cool the reactors but would ruin them for future operation, such as the decision to try to cool the reactors with seawater.
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The heat that keeps the core of the earth molten is primarily radioactive decay -it is what makes rock into liquid lava.
Portland city leaders say they were spurred toward fluoride when a citizens' group noted rising tooth decay among low-income and minority children.
They suspect it may be the residue from the decay of once-living tissue cells, not just bone a finding stirring skepticism among other paleontologists.
Dr Krag and colleagues at Esoc, like a number of teams around the world, are now busy modelling the decay in Phobo-Grunt's orbit.
Other experiments, notably at the Fermi National Accelerator facility in the US, have not definitively found a notable difference between the two kinds of decay of D-mesons.
There was a pilot investigation program, which, among other things, traced a 1904 fruit-decay crisis in California to cuts in the fruit from stem clippers and the fingernails of handlers (and, along the way, introduced modern packing methods industry-wide).
Our best understanding of physics so far, called the Standard Model, suggests that the complicated cascades of decay of D-mesons into other particles should be very nearly the same - within less than 0.1% - as a similar chain of antimatter decays.
Using Argon-argon dating - a technique based on the decay ratio of radioactive potassium - researchers at the University of California Berkeley and the University of Glasgow have revised both the date of the dinosaur extinction 66 million years ago, and the timing of the Chicxulub asteroid impact that occurred at around the same time.
Despite its graceful, moss-swathed decay, the gate is undeniably imposing, its four giant bodhisattva faces staring beatifically out.
According to The Independent a brisk walk can help prevent mental decay in the over-sixties.
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These negotiations will determine the rate of integer-value decay and will revalue numbers accordingly.
He said the paintings had a variety of themes - social decay, issues of emasculation, lack of identity, changing landscapes.
It will reopen next year after decades of decay as a multi-purpose venue incorporating a restaurant, heritage centre and luxury accommodation.
Some of the city's formerly upscale villas and apartments languish in not-so-genteel decay, crowded with multiple families that moved in after the revolution.
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The pions, in turn, will decay rapidly into very high-energy light, or gamma rays.
Detroit could be the city to buck this trend, with its well-documented urban decay, its abundant broken windows.
Tritium would not be very dangerous just sitting in a tank somewhere -it would decay to very low levels of radiation in time.
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"The fact she had her teeth extracted several years before her death because of what her family believed was Coke-induced tooth decay, and the fact that one or more of her children were born without enamel on their teeth, should have been treated by her, and by her family, as a warning, " TVNZ quotes his statement as saying.
Figures from the national dental inspection programme, for 2011-12, showed 67% of P1 pupils had no obvious decay, compared to 54% in 2005-06.
Neighbourhoods such as Parkhead and Shettleston are more desolate, with rows of once-grand Edwardian houses crumbling in picturesque decay, and empty lots and derelict shops a stone's throw from city-centre streets that boast the highest rents in Scotland.
If they return they build modern houses near roads, leaving the fort-like villages to decay into the mountainsides.
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