| 单词 | half-life |
| 例句 | “We ate at the restaurant. Pigeon says DeMarco’s pizza has a half-life of ten minutes. That’s from chemistry, and it means he only eats it fresh out of the oven.” Liar & Spy 2012-08-07T00:00:00Z For six years, Sobukwe lived a kind of half-life on the island; he was a free man who was denied his liberty. Long Walk to Freedom 1994-01-01T00:00:00Z “But I can decrease the half-life while simultaneously making the potency tenfold.” The Last Cuentista 2021-10-12T00:00:00Z Someone once worked out, for instance, that dimes have a half-life of about 30 years. A Short History of Nearly Everything 2003-05-06T00:00:00Z The rules of physics dictated that an element with a half-life of 2.3 days had to be highly unstable. Big Science 2015-07-07T00:00:00Z “By reducing its half-life, you will be able to occupy the planet far sooner,” I go on, hoping she won’t be able to resist. The Last Cuentista 2021-10-12T00:00:00Z Radio-sodium had a gratifyingly lengthy half-life of fifteen and a half hours and gamma ray energies that Ernest calculated at about 5 million electron volts. Big Science 2015-07-07T00:00:00Z Imagine you had a sample of material with a half-life of 30 seconds. A Short History of Nearly Everything 2003-05-06T00:00:00Z The radioactive element used in the core was solinium 2, which had a half-life of fourteen seconds. Artemis Fowl 2001-04-26T00:00:00Z This was true at the time of Urey’s writing: of the known radioisotopes, carbon-11 had a half-life of only twenty-one minutes; nitrogen-13, only ten; and oxygen-15, only two. Big Science 2015-07-07T00:00:00Z The half-life of a substance is the time it takes for it to lose one half of its initial value. The Sun Is Also a Star 2016-11-01T00:00:00Z The longer an isotope’s half-life, the more muted its radioactivity, and, therefore, the more difficult it was to detect. Big Science 2015-07-07T00:00:00Z Alas, certain members of this cast could have the half-life of plutonium. Shutting down the house: 'Jersey Shore' ending run 2012-12-18T16:32:50Z This is a novel with a long half-life. The Essential Philip K. Dick 2022-10-26T04:00:00Z They are strong international sellers, with a long box-office half-life for any sequels. Action sequels hit more targets beyond US shores 2013-03-05T13:13:51Z We see how “gender traitors” are dealt with, flashbacks reveal how quickly attitudes towards women shifted and Offred has to come to terms with the hopeless reality of her new “half-life”. The best TV episodes of 2017, from The Deuce to Line of Duty 2017-12-21T05:00:00Z Their project of de-acculturating themselves is rendered matter-of-factly, without suspense, since — existing in a half-life of childish patter and reductive reasoning — they didn’t exhibit much tension of personality or emotional intelligence in the first place. To Sayaka Murata, Nonconformity Is a Slippery Slope 2020-10-06T04:00:00Z Or was it the woozy Hitler rant the designer spouted in a separate incident that was captured on video, the one that, like plutonium, will have a half-life of 80,000,000 years? At the Bar in the Galliano Case, Silence 2011-03-01T22:33:22Z The city of Pripyat there remains a post-apocalyptic desolation, but the rural wilds beyond sustain a kind of half-life for those who refused to leave their native homes. Photographs of Wendover Air Base and Chernobyl 2012-03-10T05:03:24Z I am going down with the ship into the whirlpool of electronic half-life. Technology is taking over my family 2013-01-19T07:45:01Z Ballet skiing’s internet renaissance has granted the form a new half-life — enough to enthrall, and puzzle, another generation of fans. When Ski Ballet Pushed at the Porous Boundary Between Art and Sport 2022-02-11T05:00:00Z But the similarities, not so much to "Do Androids Dream of Electric Sheep" or "The Simulacra," but to the amazing half-life world of "Ubik" has really drawn partner and I in. ‘Westworld’ Season 1, Episode 4: Truth and Consequences 2016-10-23T04:00:00Z “I don’t want to settle for a half-life,” she writes. Rock Lives: This Season’s Pop Music Biographies and Memoirs 2016-11-30T05:00:00Z Their half-life is the life under the surface. In 'Half Life,' Cloud Eye Control tries to see the unseen 2015-01-16T05:00:00Z In rose gold, a substance of enduring value is transformed into a consumer item with the half-life of all things modish. The Semiotics of “Rose Gold” 2015-09-14T04:00:00Z The half-life of a social media sensation tends be counted in hours. 'Chevy Guy' Becomes Part of GM's Official Marketing Stuff 2014-10-31T04:00:00Z “Manhattan,” a drama premiering Sunday night on the newly ambitious WGN America, valiantly tries to coax some radioactive clicks from whatever metaphorical half-life remains in the origin story of the bomb. WGN’s ‘Manhattan’: Hard to build but easy to bomb But it's become possible, at least, to imagine a future for the show beyond its current half-life as a Christmas Day spacefiller. Tom Ewing 2010-12-23T22:14:01Z Scott described it as “more curiosity than provocation, an artifact of a faded world brought to zombie half-life by the cinematic technology of the present.” Read It Before You See It 2019-09-19T04:00:00Z I started writing because every single day I was living a half-life. White supremacists 'swatted' my home to silence me. I will not be silent 2019-08-30T04:00:00Z He wants coroners to test routinely for GHB – because it has a short half-life, it has often left the body. It melts plastic and can kill – so why is club drug GHB on the rise? 2018-11-24T05:00:00Z Now we must await the inevitable deluge of ripoff versions as the half-life of Call Me Maybe's freshness runs its course, and as the industry continues to react rather than act. Song of the year 2012-12-13T16:00:00Z This is a story with a hefty half-life. Books of The Times: Inventing a Graphic Treatment for the Curies 2010-12-21T17:05:40Z The small-scale, relatively inexpensive studies that are most often published in technical journals are unlikely to yield discoveries that have a half-life greater than ten years. Science doesn’t know everything 2013-06-02T18:00:00Z She weathers such treatment with the staunch belief that "being barely alive, on your own terms, is better than living a bloated half-life on someone else's terms." Jeanette Winterson's memoir of the redemptive power of books 2012-03-07T22:47:07Z This lends the character a half-ghostly quality that is consistent with the half-life he lives. Theater Review: ‘In Paris’ Stars Mikhail Baryshnikov 2012-08-03T22:57:36Z The issue of how the postmodern superego has reversed Kant's categorical imperative and left us stranded in a half-life of compulsive consumption may be of interest to some. Zoi Dimitriou Company; Tanztheater Wuppertal Pina Bausch – review 2012-06-16T23:05:44Z Correct me if I’m wrong, but do snow globes or bobbleheads even have a kitsch half-life? To Campuses Without a Compass 2014-05-15T04:00:00Z Many prairie towns have faded to an irreducible half-life and are preserves, even in local speech habits, of earlier times. Thomas McGuane on Small-Town America 2019-09-16T04:00:00Z She wanted to teach them the importance of being faithful to one’s own inner truth: that an emotional half-life is not worth living. Motherlode Blog: Is the 'Good Enough' Marriage Good for the Children? 2011-10-17T15:29:20Z Also intriguing to me was the half-life that the Whiffs — or the 12 of the 14 who are not taking classes — lead. Whiffenpoofs Are Singing for Their Supper 2013-01-12T00:10:26Z It seems there might be a half-life effect. 2009-12-31T19:00:00Z Near the end of this book Yunior writes, “The half-life of love is forever.” A cheater’s guide to everything 2012-09-10T19:49:00Z But rather than the quarks and gluons of conventional physics, Mr. Hannah sought the dark matter of the heart, the half-life of memory. Books of The Times: Southern Writer With a Soft Spot for Wild Men Metes Out High-Octane Bonbons 2010-12-28T20:32:04Z In such a fledgling enterprise, the half-life of facts can be especially brief. Pop neuroscience is bunk! 2013-06-08T15:30:00Z For the first time, she was pondering the half-life of camp. To Campuses Without a Compass 2014-05-15T04:00:00Z These highly effective treatments combine a potent, fast-acting artemisinin derivative and a partner drug with a long half-life that acts more slowly to eliminate residual parasites. Malaria: Treatment of Plasmodium falciparum malaria patients under threat in the Horn of Africa 2023-09-29T04:00:00Z You're sort of averaging everything, but it's so much faster to have one little half-life than to try and manage hundreds of half lives over huge amounts of time. Meet the Physicist who Spoke Out against the Bomb She Helped Create 2023-08-24T04:00:00Z Each isotope has a different half-life, meaning it decays at a different rate when buried. When Greenland was green: Ancient soil from beneath a mile of ice offers warnings for the future 2023-07-23T04:00:00Z Some of these radionuclides have a relatively short half-life and would already have decayed in the 12 years since the disaster. Is Fukushima Wastewater Release Safe? What the Science Says 2023-06-23T04:00:00Z All uranium is radioactive, and each isotope has its own unique half-life. The US will send depleted uranium munitions to Ukraine — an expert explains their health effects 2023-06-17T04:00:00Z But tritium forms only in small quantities naturally, and it decays radioactively with a half-life of just 12 years, so it's constantly disappearing and must be produced afresh. What Is the Future of Fusion Energy? 2023-06-05T04:00:00Z “Fentanyl has a very quick half-life, and when you include xylazine with fentanyl, it does two things,” he said. LASD saw signs of deadly street drug 4 years ago, told health officials about it this month 2023-03-22T04:00:00Z Lead, for example, has a half-life of 700 years or more, meaning it may take that long for its concentration in the soil to decrease by half. Soils of war: The toxic legacy for Ukraine's breadbasket 2023-03-01T05:00:00Z If other radionuclides are removed, the contaminated water could simply be stored for 40 to 60 years, since tritium has a half-life of only about 12 years. Despite opposition, Japan may soon dump Fukushima wastewater into the Pacific 2023-01-23T05:00:00Z Part of its usefulness as a drug is that it has a pretty short half-life in our body. Meet the philosopher who believes human civilization wouldn't exist without alcohol 2023-01-17T05:00:00Z California’s hyper-focus on water scarcity is also a product of what Mount calls “the half-life of disaster memory.” California’s paradox: Confronting too little water, and too much 2023-01-10T05:00:00Z I think that fearlessness costs her, but Jessie could never live a half-life. For Jessie Buckley and Claire Foy, it is so much more than talking 2023-01-03T05:00:00Z The sentimentality of loss can have a joltingly short half-life; that feels like something Lennon would have understood. Imagining a Memorial to an Unimaginable Number of Covid Deaths 2022-11-09T05:00:00Z “If … we need something a little more potent, or that has a better half-life, I have a third-generation antibody we’re looking at now,” Seder said. A new tool to prevent malaria shows promise: Antibody drugs 2022-10-31T04:00:00Z In another tidbit to inform models, the half-life of magnesium-38 was surprisingly short, says Heather Crawford, a nuclear physicist at Lawrence Berkeley National Laboratory and lead author. It may be possible to cram more neutrons into atomic nuclei than previously thought 2022-10-26T04:00:00Z The people perform everyday tasks while in a sort of half-life, surrounded by death. Hiroshima, seen through the eyes of innocence and experience 2022-09-22T04:00:00Z Half of the remaining nuclei decay in the next half-life. College Physics for AP Courses 2015-08-12T00:00:00Z It is possible to express the decay constant in terms of the half-life, t1/2: Chemistry 2019-02-14T00:00:00Z This is a linear equation in the form y = ax + b, where a is the term in parenthesis containing the half-life of 87Rb. Biology for AP Courses 2022-06-09T00:00:00Z A particular nucleus may last a shorter or longer time than its half-life, but in a large sample, almost exactly half of the nuclei will have decayed after a time equal to one half-life. Astronomy 2016-10-13T00:00:00Z With what kind of exponential model would half-life be associated? College Algebra with Corequisite Support 2020-09-23T00:00:00Z Therefore, the number of radioactive nuclei decreases from N to N / 2 in one half-life, then to N / 4 in the next, and to N / 8 in the next, and so on. College Physics for AP Courses 2015-08-12T00:00:00Z Define the term half-life and illustrate it with an example. Chemistry 2019-02-14T00:00:00Z For example, cortisol has a half-life of 60 to 90 minutes, while epinephrine, an amino acid derived-hormone, has a half-life of approximately one minute. Biology for AP Courses 2022-06-09T00:00:00Z The half-life of a substance or quantity is the amount of time it takes for half of the initial amount of that substance or quantity to decay. College Algebra 2021-12-21T00:00:00Z The amount of time it takes for the substance to decay to half of its original amount is called the half-life of the substance. Intermediate Algebra 2020-05-06T00:00:00Z In one half-life t1 / 2 , the number decreases to half of its original value. College Physics for AP Courses 2015-08-12T00:00:00Z Suppose that the half-life of steroids taken by an athlete is 42 days. Chemistry 2019-02-14T00:00:00Z NO has a very short half-life and therefore only functions over short distances. Biology for AP Courses 2022-06-09T00:00:00Z Traveling would beat sitting at home living a half-life, staring at my feet and feeling morbid. A road trip through Yeats country in County Sligo, Ireland 2022-07-29T04:00:00Z If its half-life is 6 hours, how much of the radioactive material form a 0.5 ml injection will be in the body in 24 hours? Intermediate Algebra 2020-05-06T00:00:00Z Half of what remains decay in the next half-life, and half of those in the next, and so on. College Physics for AP Courses 2015-08-12T00:00:00Z Technetium-99m is a popular radioisotope for medical imaging studies that undergoes relatively rapid decay and exhibits a half-life of about six hours. Chemistry 2019-02-14T00:00:00Z The additional steps involved in eukaryotic mRNA maturation create a molecule with a much longer half-life than a prokaryotic mRNA. Biology for AP Courses 2022-06-09T00:00:00Z If the half-life of a drug is 2 hours, what fraction of the initial dose remains after 6 hours? Calculus, Vol 2 2016-03-30T00:00:00Z Radioactive technetium-99m is often used in diagnostic medicine as it has a relatively short half-life but lasts long enough to get the needed testing done on the patient. Intermediate Algebra 2020-05-06T00:00:00Z Carbon-14 has a half-life of 5730 years and is produced in a nuclear reaction induced when solar neutrinos strike 14 N in the atmosphere. College Physics for AP Courses 2015-08-12T00:00:00Z All nuclear decay processes follow first-order kinetics, and each radioisotope has its own characteristic half-life, the time that is required for half of its atoms to decay. Chemistry 2019-02-14T00:00:00Z The time it takes for half of the original concentration of an isotope to decay back to its more stable form is called its half-life. Biology for AP Courses 2022-06-09T00:00:00Z Just as systems exhibiting exponential growth have a constant doubling time, systems exhibiting exponential decay have a constant half-life. Calculus, Volume 1 2016-03-30T00:00:00Z The half-life of radioactive iodine is 60 days. Intermediate Algebra 2020-05-06T00:00:00Z Intuitively, you would expect the activity of a source to depend on two things: the amount of the radioactive substance present, and its half-life. College Physics for AP Courses 2015-08-12T00:00:00Z In each succeeding half-life, half of the remaining concentration of the reactant is consumed. Chemistry 2019-02-14T00:00:00Z Because the half-life of 14C is long, it is used to date formerly living objects such as old bones or wood. Biology for AP Courses 2022-06-09T00:00:00Z To calculate the half-life, we want to know when the quantity reaches half its original size. Calculus, Volume 1 2016-03-30T00:00:00Z Knowing the half-life of a substance allows us to calculate the amount remaining after a specified time. Algebra and Trigonometry 2015-02-13T00:00:00Z So activity R should be proportional to the number of radioactive nuclei, N , and inversely proportional to their half-life, t1 / 2 . College Physics for AP Courses 2015-08-12T00:00:00Z The decomposition of hydrogen peroxide is a first-order reaction, and, as can be shown, the half-life of a first-order reaction is independent of the concentration of the reactant. Chemistry 2019-02-14T00:00:00Z Most of those who remain are either city workers — the city is now Kharkiv’s biggest employer — those too poor to leave or young people determined to stick it out in the city’s edgy wartime half-life. Kharkiv Tried to Return to Normal. Russian Shelling Wouldn’t Let It. 2022-07-19T04:00:00Z The time it takes for half of a sample’s radioactive atoms to decay is its half-life. Miller & Levine Biology 2018-01-01T00:00:00Z We may use the exponential decay model when we are calculating half-life, or the time it takes for a substance to exponentially decay to half of its original quantity. Algebra and Trigonometry 2015-02-13T00:00:00Z Thus the probability of finding the particle outside the barrier is greater, and the half-life is shorter. College Physics for AP Courses 2015-08-12T00:00:00Z Invoking the definition of half-life, symbolized requires that the concentration of A at this point is one-half its initial concentration: Chemistry 2019-02-14T00:00:00Z The time it takes for half of the original concentration of an isotope to decay to its more stable form is called its half-life. Environmental Biology 2018-09-06T00:00:00Z The longer the half-life an element has, the older the fossil it can date. Miller & Levine Biology 2018-01-01T00:00:00Z We use half-life in applications involving radioactive isotopes. Algebra and Trigonometry 2015-02-13T00:00:00Z A favorite isotope in physics labs, since it has a short half-life and decays to a stable nuclide. College Physics for AP Courses 2015-08-12T00:00:00Z For a second-order reaction, is inversely proportional to the concentration of the reactant, and the half-life increases as the reaction proceeds because the concentration of reactant decreases. Chemistry 2019-02-14T00:00:00Z Because the half-life of 14C is long, it is used to age formerly living objects, such as fossils. Environmental Biology 2018-09-06T00:00:00Z After one half-life, half the parent has decayed so there is 50% daughter and 50% parent, a 50/50 ratio, with D/P = 1. An Introduction to Geology 2017-01-01T00:00:00Z To the nearest minute, what is the half-life of the drug? Algebra and Trigonometry 2015-02-13T00:00:00Z Among the things to consider are the isotope chosen, its half-life and decay energy, the power needs of the probe and the length of the flight. College Physics for AP Courses 2015-08-12T00:00:00Z Unlike with first-order reactions, the rate constant of a second-order reaction cannot be calculated directly from the half-life unless the initial concentration is known. Chemistry 2019-02-14T00:00:00Z This more complex structure extends the half-life of steroid hormones much longer than that of hormones derived from amino acids. Anatomy and Physiology 2013-06-19T00:00:00Z The ratio of parent to a daughter in terms of half-life. An Introduction to Geology 2017-01-01T00:00:00Z TRY IT #2 Cesium-137 has a half-life of about 30 years. Algebra and Trigonometry 2015-02-13T00:00:00Z And, although its half-life is short, it is easily and continuously produced on site. College Physics for AP Courses 2015-08-12T00:00:00Z Restricting the time and concentrations to those defined by half-life: and Substituting these terms into the zero-order integrated rate law yields: Chemistry 2019-02-14T00:00:00Z A hormone’s half-life is the time required for half the concentration of the hormone to be degraded. Anatomy and Physiology 2013-06-19T00:00:00Z The half-life of 238U is 4.5 billion years, i.e., the time it takes for half of the parent isotope atoms to decay into the daughter isotope. An Introduction to Geology 2017-01-01T00:00:00Z To the nearest hour, what is the half-life of the drug? Algebra and Trigonometry 2015-02-13T00:00:00Z Worse yet, plutonium has a long radioactive half-life and is not readily eliminated by the body, and so it will remain in the lungs. College Physics for AP Courses 2015-08-12T00:00:00Z As for all reaction orders, the half-life for a zero-order reaction is inversely proportional to its rate constant. Chemistry 2019-02-14T00:00:00Z For example, the lipid-derived hormone cortisol has a half-life of approximately 60 to 90 minutes. Anatomy and Physiology 2013-06-19T00:00:00Z The time it takes for half of the atoms in a substance to decay is called the half-life. An Introduction to Geology 2017-01-01T00:00:00Z To the nearest minute, what is the half-life of this substance? Algebra and Trigonometry 2015-02-13T00:00:00Z We on the Earth see the muon’s half-life time dilated—as viewed from our frame, the muon decays more slowly than it does when at rest relative to us. College Physics for AP Courses 2015-08-12T00:00:00Z However, the half-life of a zero-order reaction increases as the initial concentration increases. Chemistry 2019-02-14T00:00:00Z In contrast, the amino acid–derived hormone epinephrine has a half-life of approximately one minute. Anatomy and Physiology 2013-06-19T00:00:00Z In other words, the half-life of an isotope is the amount of time it takes for half of a group of unstable isotopes to decay to a stable isotope. An Introduction to Geology 2017-01-01T00:00:00Z One such application is in science, in calculating the time it takes for half of the unstable material in a sample of a radioactive substance to decay, called its half-life. Algebra and Trigonometry 2015-02-13T00:00:00Z In this section we explore half-life and activity, the quantitative terms for lifetime and rate of decay. College Physics for AP Courses 2015-08-12T00:00:00Z The half-life of a reaction is the time required to decrease the amount of a given reactant by one-half. Chemistry 2019-02-14T00:00:00Z For example, the half-life of tritium—a radioisotope of hydrogen—is about 12 years, indicating it takes 12 years for half of the tritium nuclei in a sample to decay. Anatomy and Physiology 2013-06-19T00:00:00Z The half-life is constant and measurable for a given radioactive isotope, so it can be used to calculate the age of a rock. An Introduction to Geology 2017-01-01T00:00:00Z Table 1 lists the half-life for several of the more common radioactive substances. Algebra and Trigonometry 2015-02-13T00:00:00Z The time in which half of the original number of nuclei decay is defined as the half-life, t1 / 2 . College Physics for AP Courses 2015-08-12T00:00:00Z A reaction’s half-life varies with rate constant and, Chemistry 2019-02-14T00:00:00Z Plus, Kowalcyk and others say, fentanyl has a much shorter half-life than heroin, leading people to use more frequently, anxious to avoid severe withdrawals. Crime and community define one of downtown Seattle’s most complex areas 2022-06-24T04:00:00Z But tritium, with a half-life of 12.3 years, exists naturally only in trace amounts in the upper atmosphere, the product of cosmic ray bombardment. Fusion power may run out of fuel before it even gets started 2022-06-22T04:00:00Z One of the common terms associated with exponential decay, as stated above, is half-life, the length of time it takes an exponentially decaying quantity to decrease to half its original amount. Algebra and Trigonometry 2015-02-13T00:00:00Z A more precise definition of half-life is that each nucleus has a 50% chance of living for a time equal to one half-life t1 / 2 . College Physics for AP Courses 2015-08-12T00:00:00Z The half-life of a zero-order reaction decreases as the initial concentration of the reactant in the reaction decreases. Chemistry 2019-02-14T00:00:00Z Boice said one of the most concerning radioactive elements emitted from the Chernobyl accident, iodine, has a short half-life of eight days. Wildfires in the Area Around Chernobyl Raise Fears of Radioactive Smoke 2022-03-22T04:00:00Z All that said, “Pushin P” doesn’t deserve to go down in history as some case study in hype-cycle shrinkage or the half-life of cool. Perspective | The precipitous rise and fall of ‘Pushin P’ 2022-03-11T05:00:00Z Every radioactive isotope has a half-life, and the process describing the exponential decay of an isotope is called radioactive decay. Algebra and Trigonometry 2015-02-13T00:00:00Z The concept of half-life is applicable to other subatomic particles, as will be discussed in Particle Physics. College Physics for AP Courses 2015-08-12T00:00:00Z The half-life of a first-order reaction is independent of concentration, and the half-life of a second-order reaction decreases as the concentration increases. Chemistry 2019-02-14T00:00:00Z Cesium, another element of radioactive concern, has a longer half-life, more than 30 years, and remains in the environment longer. Wildfires in the Area Around Chernobyl Raise Fears of Radioactive Smoke 2022-03-22T04:00:00Z “Rich would put us on to a concept, like the concept of nuclear half-life, nuclear fallout,” an idea that inspired the title “Illadelph Halflife.” Is There Such a Thing as Black Thought? 2022-02-24T05:00:00Z To find the half-life of a function describing exponential decay, solve the following equation: Algebra and Trigonometry 2015-02-13T00:00:00Z For an arbitrary time, not just a multiple of the half-life, the exponential relationship must be used. College Physics for AP Courses 2015-08-12T00:00:00Z Plastics are a diverse class of contaminants containing complex mixtures of among 10,000 different monomers, additives and processing aids, making it difficult to estimate longevity, though scientists are working to discern better half-life estimates. Perspective | Five myths about plastics 2022-01-14T05:00:00Z The antibody was engineered to extend its half-life, which, according to Virgin, providentially enhances distribution to the lung. Preparing for the Next Plague 2022-01-06T05:00:00Z These disruptions — perhaps more than oil industry executives and the people who regulate them initially understood — have a long half-life. Gravel or green: What will become of Alaska’s coastal plain? 2021-12-19T05:00:00Z To the nearest day, what is the half-life of this substance? Algebra and Trigonometry 2015-02-13T00:00:00Z The shorter the half-life, the more decays per unit time, for a given number of nuclei. College Physics for AP Courses 2015-08-12T00:00:00Z The blip of dopamine that comes from making an impulse purchase has a short half-life, but serious consequences. Buy Nothing groups offer an antidote to waste and isolation, with a world of free stuff 2021-12-10T05:00:00Z “At the end of the day, the ability of Pakistan to guide or direct the Taliban has a half-life that is very short and is diminishing fast,” Zaidi said. Routes out of Afghanistan dwindle as Pakistan cancels flights 2021-10-14T04:00:00Z "First to know if you've got the placebo, then to know the efficacy, then to know the half-life of the antibodies and how long they last." Meet the citizen scientists tinkering with their own immune systems in an attempt to avoid COVID 2021-08-13T04:00:00Z This column is already too old, in the short half-life of today’s news cycle. Perspective | 40,302 gunshots the nation didn’t hear about 2021-07-25T04:00:00Z Activity R decreases in time, going to half its original value in one half-life, then to one-fourth its original value in the next half- College Physics for AP Courses 2015-08-12T00:00:00Z One key tracer is iron-60, forged in the cores of large stars, which has a half-life of 2.6 million years and is not made naturally on Earth. Exploding stars may have assaulted ancient Earth 2021-07-15T04:00:00Z Ambition for its own sake, without meaning or purpose, decays like the half-life of neon, gone within moments after its source. Opinion | Rumsfeld seized the wheel of power — and steered us terribly into war 2021-07-02T04:00:00Z Several studies have reported evidence for one of these elements, iron-60, with a half-life of 2.6 million years, on the ocean floor. Trace seabed plutonium points to stellar forges of heavy elements 2021-05-13T04:00:00Z Living in the shadow of fear amounted to only a half-life for me and my family, as I refused to fully open my heart to prevent hurt. Perspective | As a military spouse, I suffered secondary traumatic stress, which is real and often debilitating 2021-04-23T04:00:00Z Does the number of radioactive nuclei in a sample decrease to exactly half its original value in one half-life? College Physics for AP Courses 2015-08-12T00:00:00Z His solution to that problem, it turned out, had a half-life so brief a goldfish might have followed it. Billionaires, Bluster and the Super League That Wasn’t 2021-04-21T04:00:00Z The treatment captures 62 kinds of radionuclides, but not tritium, a radioactive isotope of hydrogen with a 12.3-year half-life that occurs naturally in trace amounts in seawater and the atmosphere. Japan plans to release Fukushima's contaminated water into the ocean 2021-04-13T04:00:00Z That is the second longest-lived version of einsteinium, with a half-life of 276 days. Einsteinium Is Mysterious. Scientists Have Unlocked Some of Its Secrets. 2021-02-07T05:00:00Z But about 180 feet below our shoes, gently radiating away with a half-life of 24,000 years, lies the plutonium core of the bomb’s secondary stage. Remembering the night two atomic bombs fell—on North Carolina 2021-01-22T05:00:00Z Look up the half-life of the final nucleus to see if it lives long enough to be a useful fuel. College Physics for AP Courses 2015-08-12T00:00:00Z Tritium is radioactive with a half-life of 12 years and global supplies are low. U.K. seeks site for world’s first fusion power station 2020-12-02T05:00:00Z “It’s not the half-life of the drug that matters,” she says. Can a nose-full of chicken antibodies ward off coronavirus infections? 2020-11-10T05:00:00Z However, VWF sets a cap on factor VIII’s time in the body, limiting its half-life to about 15 hours. New fusion protein treatment holds promise for people with ‘royal’ clotting disorder 2020-09-09T04:00:00Z “Everettium has a half-life of about 25 years,” said a physicist. That time we borked causality 2020-08-11T04:00:00Z Tritium is one of its isotopes, radioactive with a half-life of 12.3 years. Seeking Dark Matter, They Detected Another Mystery 2020-06-17T04:00:00Z For all surfaces, the quantity of virus dropped rapidly over time – in the case of plastic, the estimated median half-life of was around 6.8 hours on plastic. How long does coronavirus survive on different surfaces? 2020-05-27T04:00:00Z Antibodies have “varying degrees of half-life in a serum,” he added. Army researchers may have discovered new coronavirus-killing antibodies 2020-05-19T04:00:00Z It explains Waco’s long political half-life beyond the conspiratorial fringe, and the show’s resonance. A 2-Year-Old TV Series’s Accidental Pandemic Commentary 2020-05-14T04:00:00Z In high humidity, that half-life - the time it takes for half the virus particles to become inactivated and no longer infectious - dropped to six hours. Explainer: Could warmer weather help contain the coronavirus? 2020-04-24T04:00:00Z In a high-humidity environment, that half-life dropped to six hours, and when the virus was exposed to high humidity and sunlight, the half-life dropped to two minutes, he said. Sunlight, heat and humidity weaken coronavirus, U.S. official says 2020-04-23T04:00:00Z The average particle half-life at Chernobyl is about 30 years. Chernobyl Wildfires Reignite, Stirring Up Radiation 2020-04-11T04:00:00Z In terms of half-life, the research team found that it takes about 66 minutes for half the virus particles to lose function if they are in an aerosol droplet. New coronavirus can persist in air for hours and on surfaces for days: study 2020-03-17T04:00:00Z One thing I’ve been thinking about is how most stories in tech — heck most news stories in general — tend to have a much shorter half-life these days than they used to. Use your phone to call somebody, not just to read coronavirus news 2020-03-13T04:00:00Z In high humidity and sunlight, the half-life dropped to two minutes. Explainer: Could warmer weather help contain the coronavirus? 2020-04-24T04:00:00Z One promethium isotope, with eighty-eight neutrons, has a half-life of a few days; the other, with eighty-six neutrons, has a half-life of a few years. The Histories Hidden in the Periodic Table 2019-12-27T05:00:00Z Like radiation, Kremlin propaganda has a long half-life. The truth about Chernobyl? I saw it with my own eyes… 2019-06-16T04:00:00Z On plastic, the half-life is 6 hours 49 minutes, researchers found. New coronavirus can persist in air for hours and on surfaces for days: study 2020-03-17T04:00:00Z According to their literature survey, CBD’s half-life ranged from one hour to five days, depending on the route of administration: delivering the compound by a mouth spray meant it lasted just hours, for example. As CBD Skyrockets in Popularity, Scientists Scramble to Understand How It’s Metabolized 2019-11-18T05:00:00Z That said, the half-life of titanium is probably 60 years or so, which should mean your golf clubs should be OK. Golf equipment truths: Does a club deteriorate over time? - Golf Digest 2019-11-16T05:00:00Z But the Earth is four and a half billion years old—much older than the half-life of even the most stable predicted superheavy elements—and few traces of them have been found here. The Histories Hidden in the Periodic Table 2019-12-27T05:00:00Z His salvaging of a year that began in disaster is a testament to a political age in which the half-life of scandal is brief and where suburban voters are punishing Republicans because of President Trump. From Pariah to Powerhouse: Ralph Northam’s Unlikely Rebirth in Virginia 2019-11-11T05:00:00Z On cardboard, the half-life was about three and a half hours, but the researchers said there was a lot of variability in those results “so we advise caution” interpreting that number. New coronavirus can persist in air for hours and on surfaces for days: study 2020-03-17T04:00:00Z “With devotion and patient application,” Schmidt writes, these scholars “deciphered the languages, finding human voices in the clay, and a king terrified of dying came back to the long half-life of poetry.” How to Read “Gilgamesh” 2019-10-07T04:00:00Z The half-life of hate on the internet is long; it is exacerbated by a culture that teaches people to express their despair as rage. The cult of Columbine: how an obsession with school shooters led to a murder plot 2019-08-20T04:00:00Z But imagine being responsible for four one-gram vials of a radioactive uranium salt with a reported half-life of four and a half billion years. Harald Szeemann’s Revolutionary Curating 2019-07-15T04:00:00Z “In a universe in which memes come and go in a matter in weeks, what is the half-life of that contamination?” he asked. After Confederate statues, America’s culture war targets Betsy Ross and a founding father 2019-07-04T04:00:00Z Thousands of others commented, including one who said it was the "best misunderstanding over cake EVER", and another who quipped: "This cake is so tasty, its half-life is only 1.5 seconds." Marie Curie cake mix-up 'was a joke' 2019-06-18T04:00:00Z Originally expected to have a half-life of just minutes or hours, this heavy form of carbon was considered a low research priority. Radiocarbon revolution: the story of an isotope 2019-06-16T04:00:00Z “Because the half-life of a memorable quip or a solid quote or a good moment is endlessly reverberated on social media.” Town hall on enemy turf? Fox News debate divides 2020 Dems 2019-05-20T04:00:00Z I don’t know if I’m after truth or hanging on to its dwindling half-life. Losing Religion and Finding Ecstasy in Houston 2019-05-20T04:00:00Z As Gilbert White, a pioneer in U.S. natural hazards research, used to say, “‘The half-life of the memory of a flood is remarkably short.’ Today's Floods Occur Along "a Very Different" Mississippi River 2019-05-13T04:00:00Z Software has a half-life that can be measured by people’s foibles: code gets lost, corporate takeovers nuke smaller outfits, squishy brains and bodies fail. Analogue’s console clones are a way to preserve gaming’s past 2019-05-06T04:00:00Z "Most blue anthocyanins have a half-life of about 24 hours. And we're talking about something that needs at least about 3 months," Martin says. Meet the blue crew, scientists trying to give food, flowers, and more a color rarely found in nature 2019-05-02T04:00:00Z Because this constant is small, the resulting half-life is long. Dark-matter detector observes exotic nuclear decay 2019-04-23T04:00:00Z But their half-life is astoundingly fast, and by the time these babies are cold, they taste like mealy little icicles. The official fast food French fry power rankings 2019-02-12T05:00:00Z And much beyond 120, she says, "We don't know enough to even know what to look for—what half-life to look for, what decay properties to look for." A storied Russian lab is trying to push the periodic table past its limits—and uncover exotic new elements 2019-01-30T05:00:00Z With it, the mystery of why this element hadn’t been found was solved: eka-manganese was unstable, with a radioactive half-life of a few million years. The first synthetic element 2019-01-27T05:00:00Z Both independently asked her to provide a precise value for the half-life of the isotope actinium-227, a delicate technical procedure during which she identified the new element. Celebrate the women behind the periodic table 2019-01-27T05:00:00Z They measured the half-life of the process to be 1.8 × 1022 years, which is about one trillion times the age of the Universe. Dark-matter detector observes exotic nuclear decay 2019-04-23T04:00:00Z He explained its half-life, the unreliable nature of its decay. How Tarell Alvin McCraney Moved From ‘Moonlight’ to Broadway — and Beyond 2019-01-15T05:00:00Z The half-life of any political damage to the GOP is actually very short. Opinion | This shutdown might be different 2018-12-20T05:00:00Z With its short, six-hour half-life, it is an ideal radioactive tracer. The first synthetic element 2019-01-27T05:00:00Z Moreover, the half-life of radioactive carbon is only 5,730 years. In Cave in Borneo Jungle, Scientists Find Oldest Figurative Painting in the World 2018-11-07T05:00:00Z The successful measurement of this half-life lays the foundations for experiments that aim to detect these rare decays in other nuclei. Dark-matter detector observes exotic nuclear decay 2019-04-23T04:00:00Z Still, 100 million years old is nothing to sneeze at, considering the typical flower half-life is measured in days. Eye Candy: Fossil Flowers Bloomed When Dinosaurs Ruled the Earth 2018-10-27T04:00:00Z Antibody half-life — the time required for antibody levels to decrease by 50 percent — was 50 years for varicella zoster virus and, they estimated, more than 200 years for measles and mumps. How Long Do I Retain Immunity? 2018-09-21T04:00:00Z The method worked when job tasks stayed relatively static over time, but “the half-life of skills is getting shorter and shorter,” said LaMoreaux. Many employers are changing how raises are calculated | Produced by Advertising Publications 2018-07-31T04:00:00Z Most antibiotics destroy bacteria only when they multiply; because Treponema divides slowly, once every 30 hours or so, a single-dose antibiotic can work only if it has a long half-life, as intramuscular penicillin does. On a remote Pacific island, this doctor has revived a 60-year quest to eradicate a disfiguring disease 2018-07-19T04:00:00Z The method worked when job tasks stayed relatively static over time, but “the half-life of skills is getting shorter and shorter,” LaMoreaux said. Your raise is now based on next year's performance 2018-07-09T04:00:00Z If the coral core layers contained radioactive elements with a known half-life, it would be possible to calculate almost exactly when each growth ring was made. Cores from Coral Reefs Hold Secrets of the Seas' Past and Future 2018-06-06T04:00:00Z “What would you like this half-life to be?” Do you remember the student who was shot at FSU? 2018-05-19T04:00:00Z This was not only because his writing, with its imaginative depictions of Gaza’s half-life, was admired – but because after his death, some began to describe him as martyr. A suicide in Gaza 2018-05-18T04:00:00Z A drug’s half-life, therefor, influences the time to craving for more of its desired action, and how soon a person feels the pangs of withdrawal. 9 Things That Matter about Psychoactive Drugs 2018-05-08T04:00:00Z This is due to differences in the drugs’ half-life — the time it takes the body to clear the medication once the pills are stopped. Many People Taking Antidepressants Discover They Cannot Quit 2018-04-07T04:00:00Z In the case of radioactive material, how long the substance is dangerous depends on how quickly its atoms lose energy, a process known as radioactive decay and measured by what’s called a half-life. How the nerve agent in the spy attack and other toxins cause widespread contamination 2018-03-23T04:00:00Z The imaging agent was first used in medical applications in the 1960s because its short half-life meant that patients were getting less exposure to radioactivity than from other diagnostic tracers. Inside the Global Relay Race to Deliver Moly-99 2018-01-12T05:00:00Z The energy Payton exuded as the offensive coordinator for Miami University in Ohio, starting in 1995, has had a long half-life. Sean McVay, 31, Raced to N.F.L. Pinnacle Faster Than His Counterparts 2017-09-09T04:00:00Z A single drink of an alcoholic beverage taken by an adult has a half-life of about half an hour. 9 Things That Matter about Psychoactive Drugs 2018-05-08T04:00:00Z The songs were etched onto the “Golden Record,” a gold-plated copper disk, encased in electroplated metal with a half-life of... When We Sent Rock Stars to Space 2017-09-04T04:00:00Z But 129I, which has a half-life of 15.7 millions years, retains the initial imprint of its input history over a long period of time. Radioactive 'pooh sticks' trace carbon's ocean journey - BBC News 2017-08-16T04:00:00Z Toxic words, writes Mr. Baker, “tend to have a long half-life.” Right and Left on the Violence in Charlottesville 2017-08-14T04:00:00Z And often, it is more than spin: It is a way for the secretary to test whether an idea has a half-life longer than the plane ride. Rex Tillerson’s Hope for a Media-Free Bubble May Burst 2017-03-19T04:00:00Z The half-life of a drug is the time it takes for the blood level of the substance to reduce by 50 percent. 9 Things That Matter about Psychoactive Drugs 2018-05-08T04:00:00Z Being a pipe fitter/welder and having been as close to a hot reactor as I am to this laptop, I have developed a half-life of my own. The Challenge of Cutting Coal Dependence 2016-08-30T04:00:00Z What is the half-life of his new economic proposals? Trump’s economic speech cleared the bar 2016-08-08T04:00:00Z The half-life of vice presidential candidates is almost always short. Trump’s vice presidential picks suggest he isn’t that crazy 2016-07-14T04:00:00Z Some pills are more addictive than others, and the difference often boils down to half-life—how long the drug remains in your system. What Big Pharma doesn’t want you to know about the opioid epidemic 2016-06-03T04:00:00Z Xanax’s half-life was officially 11 hours, on average, but patients told me they could feel it wearing off more rapidly than that. 9 Things That Matter about Psychoactive Drugs 2018-05-08T04:00:00Z JQ1 was not intended to be a drug; limitations in its solubility and half-life mean that it probably never will be. Chemical probes: A shared toolbox : Nature : Nature Publishing Group 2016-05-10T04:00:00Z “I was making a horror picture, involving a nuclear power station, and in doing our research and finding out about the half-life of plutonium and realizing, ‘My God, this is really a monster.’ Douglas dons purple in honor of Prince at Tribeca Film Fest 2016-04-24T04:00:00Z Particles left in the soil while their half-lives tick past harm nobody; the average particle half-life at Chernobyl is about 30 years. Chernobyl’s Silent Exclusion Zone (Except for the Logging) 2016-04-23T04:00:00Z Xanax is considered the most addictive of the benzodiazepines because it has the shortest half-life—after only about six hours the drug leaves the body and the person craves more. What Big Pharma doesn’t want you to know about the opioid epidemic 2016-06-03T04:00:00Z They could feel it wearing off, reaching its half-life, in a few hours. 9 Things That Matter about Psychoactive Drugs 2018-05-08T04:00:00Z One of these elements is iron, and more specifically iron-60: an unstable isotope of iron with a half-life of roughly 2.6 million years. Explosions in the sky edition 2016-04-10T04:00:00Z The half-life of plutonium-239 is around 24,100 years; the written history of humanity is around 5,000 years old. Generation Anthropocene: How humans have altered the planet for ever 2016-04-01T04:00:00Z Cabaret Voltaire was turned into a bingo parlor in the 1920s and a series of pubs in the 1980s, enjoying a strange half-life among Dadaism’s admirers as a shrine. Dada: 100 Years Later 2016-01-19T05:00:00Z This is the half-life - which is the time it takes for the level of radioactive to fall to half of its initial value. Hardest sell: Nuclear waste needs good home - BBC News 2016-01-17T05:00:00Z "Heroes," the song, is a depiction of romantic unity and its half-life, folded gently and loaded into a glowing sphere that is always both sinking and rising. Exploring David Bowie's catalog 2016-01-08T05:00:00Z The long half-life of breach disclosure also means that, by the time a criminal breach does become public, the campaign organization has long since dissolved. Clinton and Sanders are fighting about data because campaigns are bad at protecting it 2015-12-18T05:00:00Z “Let’s wait and see the half-life of this after the next three months.” NBC/WSJ Poll: Terror fears reshape 2016 landscape 2015-12-14T05:00:00Z That would be a type of thermonuclear warhead with a layer of cobalt-59, which on detonation would be transmuted into highly radioactive cobalt-60 with a half-life longer than five years. Russia reveals giant nuclear torpedo in state TV 'leak' - BBC News 2015-11-12T05:00:00Z The Great Recession and income inequality are firsthand experiences with a long half-life. Midnight in America 2015-11-03T05:00:00Z The fact that there is still buried plutonium - with a half-life of 24,000 years - at the site speaks to the “uncertainties of what remains there,” he said. Rocky Flats stirs strong emotions 10 years after cleanup 2015-10-17T04:00:00Z Each series stars an actor not much over 50 whose youthful pinup prettiness hasn't reached its half-life — indeed has been remarkably slow to decay, supporting and underscoring their characters' substantial but not unwavering self-regard. New Fox sitcoms 'The Grinder' and 'Grandfathered' are done well 2015-09-29T04:00:00Z "There is a short half-life. The longer you wait, the more it depreciates in value," Solomon said. Start-up seeks to help brands sell excess fashion stock 2015-09-17T04:00:00Z The half-life of that varies a lot from brand to brand.” Picking Up CCS Where Foot Locker Left Off 2015-09-16T04:00:00Z The half-life of the detained migrant is largely unknown by Canadian society – that is, until a death in custody occurs and happens to receive media coverage. Canada tries to discourage refugees and the results are deadly | Hadani Ditmars 2015-09-06T04:00:00Z Separately, part of our testing is identifying the half-life of the drug. Fake Weed Leads to a Real Drug Crisis 2015-08-25T04:00:00Z The enzyme was stable at human body temperature—and was able to cut the half-life of nicotine from a couple hours to less than 15 minutes—that is, it greatly accelerated nicotine’s disappearance. Nicotine-Chomping Bacteria Could Help Smokers Quit 2015-08-13T04:00:00Z Alena is one of tens of thousands of trans people across the United States still forced to live in the gender they were assigned at birth, stuck in a half-life in mid-transition. 'I am Alena': life as a trans woman where survival means living as Christopher 2015-07-24T04:00:00Z I have a great tool now, and actually oxytocin is hard to measure and has a very short half-life — it is a quick on/off switch. The Molecule Behind the Golden Rule 2015-07-10T04:00:00Z On the basis of that single hair Kirk Odom was to spend the next 22 years in prison and a further nine living the half-life of a paroled sex offender. The man who was jailed for 22 years – on the fantasy evidence of a single hair 2015-06-23T04:00:00Z The difference now is the pace at which new products are developed and refined and a concomitant decrease in useful half-life of mature services. Bimodal IT: A New Buzzword For Old Concepts Presents Teachable Moment 2015-06-16T04:00:00Z And right now, the other important half-life, that of the enzyme in serum, is only 3 days. Nicotine-Chomping Bacteria Could Help Smokers Quit 2015-08-13T04:00:00Z "We included a double bond in the molecules," says Shankland, "so it reacts very quickly in the atmosphere, with a half-life of weeks." How 1970s deodorant is still doing harm - BBC News 2015-06-05T04:00:00Z “Some of the radiation there has a half-life of 24,000 years, if you’re talking plutonium-239,” he says, referring to the amount of time it takes for 50 percent of the radioactivity to decay. Veteran links health issues to Marshall Islands radiation 2015-05-30T04:00:00Z Wait too long, and the technetium will decay away altogether - it has a half-life of six hours - or be flushed out of Sarah's body. The element that can make bones glow - BBC News 2015-05-29T04:00:00Z Here’s why you’ll want to: caffeine has a six-hour half-life, which means it takes a full twenty-four hours to work its way out of your system. Here's How Caffeine Can Silently Kill Your Success 2015-02-20T05:00:00Z One such is immunoglobulin, a large Y-shaped protein with a half-life of about three weeks. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z Dr. Martin said that the idea of using an immunoglobulin molecule to extend the half-life of drugs was not new, but that Trulicity was the only GLP-1 so far to use that mechanism. Eli Lilly Gets European Approval to Sell Trulicity, a Type 2 Diabetes Drug 2014-11-25T05:00:00Z Given the diminishing organic reach for Facebook pages and the short half-life of tweets, it’s understandable that posts from one source may not make a statistically significant difference. Intent To Tweet And A Failure Of Communication 2014-11-24T05:00:00Z My disquiet is caused by something less solid - a brooding sense of malevolence oozing from the earth, as though the violence has a half-life. Does the WW1 tourist trade exploit the memory of the fallen? 2014-11-08T05:00:00Z Our review of The Peripheral went up yesterday, but we also got to talk with Gibson last month about predicting the future, insulting the past, and the societal half-life of 3D-printed cronuts. William Gibson interview: time travel, virtual reality, and his new book 2014-10-28T04:00:00Z For factor VIII, Fc fusion extends the half-life from a maximum of about 12 hours to about 18 hours. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z With a half-life of between seven and 11 years, the chemicals are often passed down the food chain. Deep Sea Bugs Inspire New Method Of Destroying Cancer-Causing Pollutants 2014-10-19T04:00:00Z But the real excitement comes from turning an apparent liability – their very short half-life – into a differentiated feature. Fueling Up To Attack Cancer: Two Big Startup Financings 2014-10-14T04:00:00Z Today, some estimates of the half-life of such professional skills are as short as three years. Making Disuption Personal 2014-09-23T04:00:00Z So much for the half-life of stories in an incoherent media age. The Long Game in Eastern Europe 2014-09-22T04:00:00Z Factor IX, which has a longer half-life to begin with, shows a more dramatic increase, from one day to five days. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z And what exactly, I wondered, is the half-life of a lesson? When a doctor lands in the ER with a tube down his throat, he learns a thing or two On a whim, in flight from "the subdued drama of her half-life with Jack", Lady Justice Maye decides to assess the boy's resolve by visiting him in hospital. Ian McEwan: 'I'm only 66 – my notebook is still full of ideas' 2014-08-31T04:00:00Z Blood samples were then drawn to map the “parasite clearance half-life,” the rate at which the parasite left the patient’s bloodstream. Drug-Defying Malaria Cases Found in Southeast Asia Israel’s wars have a half-life, a variable that slides with circumstances and unscheduled events, but which is decided, to a significant degree, by how the world views the fight. Civilian Casualties Rise as Israel Hammers Gaza from the Air 2014-07-10T04:00:00Z Albumin is a major protein of blood plasma and, like immunoglobulin, has a half-life of about 20 days. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z Each has an extremely long half-life - some take hundreds of thousands of years to lose all of their radioactive potency. US plants prepare long-term nuclear waste storage 2014-05-26T04:00:00Z “Element #62: Samarium,” for example, includes a witty haiku about a radioactive isotope that is used in cancer treatment, has its origins in Russia and boasts a half-life of 106 billion years: Art review: ‘Words and Letters’ An oppressive army presence remains but is ticking away its radioactive half-life. India Ink: India’s Divisions Writ Small in a Frontier State 2014-05-05T10:57:52Z It’s a radioactive element with an atomic number of 90—which makes it an elemental heavyweight—and in its most common form has a half-life of 14 billion years. Top Ten Insanely Great Science Terms 2014-03-13T19:42:20Z Phase I safety studies of factor IX fused to albumin showed a fivefold increase in half-life, up to about four days. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z Cesium-137 has a half-life of 30 years and remains in the environment for decades. Radioactive Isotopes from Fukushima Meltdown Detected near Vancouver 2014-02-25T21:13:00Z The half-life of nicotine is two hours - within 24 hours you can no longer detect it in the body. Is there any point giving things up for January? 2014-01-06T01:13:09Z Each new approach is an attempt to solve substantial problems with existing immunotherapies, such as a lack of cell specificity, dangerous side effects, and a short half-life once inside the body. Cancer vaccines: Material breach 2013-12-18T18:51:03.601Z This has a half-life of 66 hours and slowly decays into technetium. Radioisotopes: The medical testing crisis 2013-12-11T18:50:32.531Z There are three very similar approaches, each of which extends half-life by about the same amount for the respective clotting factors. Clotting factors: Stretching time : Nature : Nature Publishing Group 2014-11-25T05:00:00Z With a half-life of 521 years, DNA breaks down fairly rapidly even under the most optimal conditions: encased in glaciers or buried beneath arctic tundra, for example. Oldest Known Early Human DNA Recovered 2013-12-05T20:40:00Z Industrial and medical users periodically replace used cobalt 60 with fresh supplies because, as with all radioactive isotopes, its emissions slowly weaken over time; its half-life is 5.27 years. Dangerous Radioactive Substance Is Stolen in Mexico 2013-12-04T17:05:13Z Also of interest to brands is the long half-life of a pin. Study Finds Pins On Pinterest Drive Sales And Have Legs 2013-11-15T14:04:00Z A γ-ray emitter with a half-life of just 6 hours, it can be attached to a molecule that targets the organ of interest. Radioisotopes: The medical testing crisis 2013-12-11T18:50:32.531Z The initial burst of goodwill and encouragement as a new hire settles in has a short half-life, even at good workplaces. Bad News for Anybody’s Who Has Messed Up at a New Job 2013-11-04T13:59:25Z The half-life in Germanium-76 and other isotopes can be calculated from the mass of the lightweight neutrinos. Search Escalates for Key to Why Matter Exists 2013-10-23T11:45:00.563Z As caffeine has a half-life in our bodies of about six hours, that should be enough time to create the new, decaffeinated me. Caffeine nation - Am I an addict? 2013-07-09T23:33:34Z This dwindling half-life—from innovation phenomenon to antique in six years—defines today’s business environment. Strategy, Uncertainty And Unfamiliarity 2013-07-08T16:20:00Z About thirty isotopes of the element have been synthesized or found to occur naturally, the longest-lived of which is 210At with a half-life of 8.1 hours. A Tale of 7 Elements: Element 85 Astatine [Excerpt] 2013-07-05T14:15:00.623Z "The bulk of these studies suggest the half-life of these chemicals is between one and four years," he says. Pesticides Spark Broad Biodiversity Loss 2013-06-18T21:15:00.150Z These in turn dictate three possible ranges for the half-life of neutrino-less double beta decay, stretching between a few trillion trillion and a few thousand trillion trillion years. Search Escalates for Key to Why Matter Exists 2013-10-23T11:45:00.563Z The Z-drugs have less of a hangover effect than benzodiazepines, thanks to their shorter half-life in the body, so their effects are less likely to be felt the next morning. Insomnia: Chasing the dream 2013-05-22T17:21:47.147Z But like the namesake volcano, its historical half-life will surely be much longer. Cyprus and the euro: crisis island 2013-03-24T22:16:09Z Michael Meyer, lead scientist for NASA’s Mars Exploration Program, noted in the press conference that Curiosity’s energy supply has an 84-year half-life. Curiosity Finds That Ancient Mars May Have Been Habitable 2013-03-13T04:56:05Z With its shorter half-life, cesium 134 levels fall faster than those of cesium 137. A Silver (Actually Cesium) Lining: Traces of Fukushima Disaster Fallout Help Scientists Track Tuna 2013-03-11T11:45:00.387Z The longer the half-life is, the rarer the decay and thus the more atoms must be monitored to see it. Search Escalates for Key to Why Matter Exists 2013-10-23T11:45:00.563Z The problem with nitrous oxide is that its half-life in the atmosphere is more than 100 years. Massive Nitrogen Pollution Accompanies China's Growth 2013-02-27T16:15:05.203Z DNA has a half-life of only 521 years, and it’s easy to contaminate or destroy. Is It Possible To Clone A Neanderthal? 2013-01-20T16:19:07Z Suppose a region retains AT of its habitat, leaving n patches, each of area /, and that the half-life depends on area as = caβ, as in Fig. [Technical Comment] Comment on "Extinction Debt and Windows of Conservation Opportunity in the Brazilian Amazon" 2013-01-17T19:25:13.667Z And along with the perspective on grief, there’s perspective on the half-life of tragedy. Fourth Avenue: Hurricane Sandy and Sandy Hook Killings – Distinct but for a Name 2012-12-31T21:47:49Z Because a longer half-life means a rarer decay, the scientists now know they need to monitor a larger sample of Germanium. Search Escalates for Key to Why Matter Exists 2013-10-23T11:45:00.563Z The first is the power supply, which uses radioactive decay with an 88-year half-life. Voyager spacecraft are still making discoveries 35 years after their launch 2012-12-17T19:49:34Z This is making the half-life of those brand promises shorter and shorter, and shrinking the deltas of premium prices and customer trust and loyalty accordingly. P&G's Social Media Orthodoxy Could Sink Its Innovation Progress 2012-11-17T14:35:44Z Surely bolstered by a digital age reverberating with misinformation, the results point to a disturbingly long half-life of lies. How Long Will A Lie Last? New Study Finds That False Memories Linger for Years 2012-11-14T16:15:22.040Z We live in an ephemeral age, where the average half-life of a tweet is seconds or minutes, not days, weeks or months. Remembering 9/11: Why the Web should help us remember better 2012-09-11T12:38:13Z More than anything, given the fire hydrant spray of information hitting voters from so many different sources, the half-life of even the biggest events is diminishing. Political Memo: Conventions Draw Crowds but Sway Few Voters 2012-09-08T02:17:09Z Unfortunately the half-life of tritium is only 12 years so it’s useless as an emissary of interstellar communication. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z It is based on the radioactive decay of one isotope into daughter isotopes according to a precise clock, a half-life, governed by nuclear physics. Planetary science: The time machine 2012-07-25T17:20:40.527Z For neutrons that roam freely outside a nucleus, the half-life for this process — the time needed for half the neutrons to decay — is about 10 minutes. Neutrino physics: Beta test 2012-07-11T17:20:34.477Z Elsevier's embargoes for green open access currently range from 12 to 48 months, depending on the journal's so-called half-life, the time after which the number of times a publication is downloaded is halved. Horizon 2020: A €80 Billion Battlefield for Open Access 2012-05-24T17:10:00Z They also found that the infections that persisted with a half-life of more than 6.2 hours jumped from 0.6 percent at the beginning of the study to 20 percent at the end. Drug-Resistant Malaria Spreads, Scientists Hunt Down Genetic Causes 2012-04-05T18:45:00.227Z Just like T, C is a potentially valuable but unfortunately useless isotope because of its half-life of 5700 years. Better (extraterrestrial) communication through chemistry: Isotopes and mirror-image molecules 2012-07-25T17:45:03.207Z "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. Japan's Post-Fukushima Earthquake Health Woes Go Beyond Radiation Effects 2012-03-02T21:15:00.213Z Its half-life varies from one isotope to the next, but is at least 10 years. Neutrino physics: Beta test 2012-07-11T17:20:34.477Z At this writing, American officials were trying to gauge whether the errant airstrike would have, as one worried official put it, “a long half-life.” The Pakistanis Have a Point 2011-12-14T10:00:00Z This isotope, with a half-life of 2.6 million years, is not made in significant quantities by any process on Earth, but is expelled by supernovae. Ancient Supernova Explosions Left Their Scars on Earth 2011-12-06T18:08:22Z Plutonium 238 has a half-life of more than 80 years, so Curiosity may be able to exceed its 23-month nominal mission lifetime by several years. NASA's Massive Curiosity Rover Nears Launch toward Mars 2011-11-24T12:15:05.677Z They carry plutonium 238, a manufactured isotope with a half-life of just 88 years, which means that its radioactive decay is so fast that it glows red-hot. Green Blog: The Competition Between Solar and Nuclear Energy Moves to Mars 2011-11-23T17:29:48Z The half-life for this process is at least 10 years. Neutrino physics: Beta test 2012-07-11T17:20:34.477Z Fair enough — there is a half-life to the taking of a public space before occupation for the sake of occupation. City Room: New York's Sullen March Toward Winter 2011-11-23T14:00:18Z "It would be very unlikely for it to have come from Fukushima since the accident was so many months ago and iodine-131 has a brief half-life," he said. Low levels of radioactive particles in Europe: IAEA 2011-11-11T17:26:16Z Cesium 137 is a source of concern for public health because the radioactive isotope has a half-life of 30 years. Fukushima Plant Released Record Amount of Radiation Into Ocean 2011-10-31T05:35:42Z However, because of their extensive use and long half-life, human exposure remains widespread. Environmental Chemicals May Prove Obstacle for Infertile Couples 2011-10-12T19:15:00.277Z The half-life for neutrino-less double-β decay, assuming that it happens, was estimated at the time to be longer than 10 years. Neutrino physics: Beta test 2012-07-11T17:20:34.477Z There is no formula for the half-life of historical memory. New York Story: When Memorials Outlast the Sentiment Behind Them 2011-09-03T00:01:28Z Radioactive cesium decays very slowly, with a half-life of 30 years. Japan Lifts Ban on Beef From Nuclear Disaster Area 2011-08-25T20:50:09Z With a half-life of 29 years, much of that initial contamination has degraded. How Did Those Vermont Fish Get Radioactive? 2011-08-05T12:40:32Z In the compartments on the ceiling, the figures are the size of life—in those round the walls, half-life size. Visits and Sketches at Home and Abroad with Tales and Miscellanies Now First Collected Vol. II (of 3) 2011-07-24T02:00:08.803Z Tritium is a radioactive form of hydrogen with a half-life of 12.3 years. Nuclear Leaks: 48 U.S. Plants Emitting Tritium 2011-06-15T18:45:00Z Cesium has a half-life of about 30 years, according to the U.S. Fukushima Risks Chernobyl ‘Dead Zone’ as Soil Radiation Soars 2011-05-30T05:41:13Z Since then, radiation levels have ebbed as short-lived radionuclides, such as iodine-131 with a half-life of 8 days, decay into stable isotopes. [News Focus] Tohoku-Oki Earthquake: Fukushima Revives The Low-Dose Debate 2011-05-19T18:25:06.877Z Other radioactive material, such as cesium 137 with a half-life of roughly 30 years, dissolves like salt in water, traveling into groundwater supplies and even . How to Tear Down a Nuclear Power Plant [Slide Show] 2011-04-29T10:15:00.247Z But the original curse on the O’Malleys does seem to have a Chernobyl half-life to it, transferable to the next owner. Sports of The Times: A Cosmic Comeuppance for the Dodgers 2011-04-29T01:39:54Z EPA considers Sr-90, meanwhile, “the most important radioactive isotope in the environment” because of its health impacts and a longer half-life of 29 years. Radioactive Strontium Found in Hilo, Hawaii Milk 2011-04-27T12:45:02Z What's more, the half-life of iodine-131 is only eight days, which means that after the nuke crisis ends, the ocean may need just six months to clear itself. With Radiation in the Water, How Safe Is Japan's Seafood? 2011-04-02T07:02:18Z As for isotopes like cesium 137, however, its decay half-life is around 30 years. Half-Life and Death: Radioactive Drinking Water Scare in Japan Subsides, but Questions Remain 2011-04-01T22:45:05.727Z Tritium cannot be separated from water and has a half-life of more than 12 years, although it emits relatively little harmful radiation when it decays. How to Tear Down a Nuclear Power Plant [Slide Show] 2011-04-29T10:15:00.247Z But the radiation will no longer be a risk after eight days because of iodine's half-life, officials say. Japan nuclear operator criticised 2011-03-26T22:34:06Z Nuclear scientists speak in terms of half-life, the time it takes for random disintegrations to reduce a radioactive sample to half its size. Week in Review: Radiation?s Enduring Afterglow 2011-03-26T18:00:08Z Old gadgets stutter into half-life when we are done with them. iPad 2 ? just another disappointing love affair? 2011-03-25T16:03:38Z Once the cesium enters the soil, its half-life of 30 years becomes a "long-lasting problem for sure," Chen says, and it will show up in vegetables, meat, and milk. What's the Current Radiation Threat to Japan's Food and Water? 2011-03-23T22:44:33Z He said the high level of radiation may persist for a week or so, considering the half-life of iodine-131. Tokyo Finds Elevated Iodine in Water 2011-03-23T15:08:51Z A: Radioactive iodine decays quickly, with a half-life of eight days, meaning the length of time it takes for half of it to break down harmlessly. So far, risk low from radiation in food in Japan 2011-03-21T23:31:04Z While some radioactive elements in nuclear fuel decay quickly, cesium’s half-life is 30 years and strontium’s is 29 years. Lessons From Chernobyl for Japan 2011-03-19T22:28:46Z For example, cesium-137 has a half-life of 30 years, meaning it will take three decades for it to lose half its radiation punch. Workers Battle Fukushima Nuclear Crisis at Personal Risk 2011-03-16T17:45:02.440Z Because the fuel is older, iodine, an element with a relatively short half-life, would not be a problem. Wind and Rain Steer Radiation?s Reach 2011-03-16T01:46:43Z Still, the two main elements of concern from a radiation leak would be radioactive iodine and cesium, which has a half-life of 30 years, so it stays around for a little while. Does Potassium Iodide Protect People from Radiation Leaks? 2011-03-15T21:45:07.540Z Cesium-137, with a half-life of 30 years, is another dangerous substance emitted in a full-scale nuclear meltdown. Dangers of a Damaged Nuclear Plant 2011-03-13T23:46:27Z The danger of nitrogen-16 is an issue only for plant workers and operators because its half-life is only seven seconds. Danger Posed by Radioactivity in Japan Hard to Assess 2011-03-13T05:05:30Z Radioactive iodine has a relatively short "half-life," which is the amount of time it takes for half of a radioactive substance to disappear. Radiation exposure poses range of potential health problems for Japanese 2011-03-12T19:41:00Z Peptide drugs are the most recent trend in drug discovery, and significant improvements are being made to overcome their shortcomings, which include high manufacturing costs, short half-life, and limited in vivo bioavailability. [Editors' Choice] Novel Peptide to Treat Sepsis-Induced Acute Lung Injury 2011-01-19T22:55:22.923Z Inset: The doubling time and half-life over time. [Research Article] Quantitative Analysis of Culture Using Millions of Digitized Books 2011-01-13T19:26:01.023Z Bioremediation experts talk about half-life, by which they mean the time it takes for the bacteria to break down half of the oil. Gulf oil spill was abated by bacteria that feed on hydrocarbons, report says 2011-01-11T05:31:03Z Iodine-131 has a half-life of eight days and is quite dangerous to human health. Danger Posed by Radioactivity in Japan Hard to Assess 2011-03-13T05:05:30Z Given the prevailing winds, it seems almost certain that some New England seats will flip back to the Republicans, a reminder of the half-life of seemingly seismic moments. Our Towns: Grasping for the Center in a Tight Connecticut House Race 2010-10-25T02:05:00Z In this case, by appealing to our worst instincts, both parties are conspiring to leave some enduring cultural poison with a very long half-life. Ad attacks on China cross the line 2010-10-12T20:01:00Z He’s a rare writer who can explain why the short half-life of tritium gas means that we no longer need to worry about suitcase bombs stolen from the old Soviet Union. Nuclear Family 2010-08-27T15:04:00Z In the field and in lab tanks where plume microbes were housed with crude oil, petroleum appears to have a half-life of just 1.2 to 6.1 days, the latest study finds. Deep-Sea Oil Plume Goes Missing 2010-08-25T15:40:00Z A half-life is the time it takes half the atoms of a radioactive substance to disintegrate. Danger Posed by Radioactivity in Japan Hard to Assess 2011-03-13T05:05:30Z His research group calculated the amount of time it takes for half of a given quantity of oil to be broken down by microbes - the so-called "half-life." Study: Petroleum-eating microbes significantly reduced gulf oil plume 2010-08-24T17:44:00Z Thankfully, the half-life of collective memory is at an all-time low, so soon the angry villagers will have moved on to their next target, and Thomas can hopefully retire in peace. Right wing wins Helen Thomas' scalp 2010-06-07T18:30:00Z The half-life of that offer is fading very, very rapidly ... Russia says it may consider Iran sanctions 2010-03-01T21:30:00Z She places herself as his equal—as the other half, without which his half-life cannot be complete. What a Young Husband Ought to Know Over the long term, the big threat to human health is cesium-137, which has a half-life of 30 years. Danger Posed by Radioactivity in Japan Hard to Assess 2011-03-13T05:05:30Z The radioactive had a half-life of about four days, which meant that it would be unsafe to approach for some three weeks—two at the minimum. Duel on Syrtis Now the old problem of half-life is taking its toll, and we can’t even hope to keep up with the birth rate any more. They Also Serve "It is an everlasting half-life or quarter-life, and these creatures who call this Hell's Dimension home, have nothing but hatred for us in their consciousness." Astounding Stories, April, 1931 Women lived a twilight life, a half-life apart, and looked out and saw men as shadows walking. The History of Woman Suffrage, Volume V And, finally, Moglaut had warned that the compact power unit pocketed on the left breast had a half-life of only thirteen years. Zero Data He had been working on a way to inhibit radioactivity—speed up the half-life until they had taken the grant away. Now We Are Three But we all know that training, though never perfect, can make the difference between a decently right and happy life and a bad, corrupt half-life or no life. Modern Women and What is Said of Them A Reprint of A Series of Articles in the Saturday Review (1868) As for the Eastern Empire, it maintained a half-life for nearly a thousand years after, Constantinople being finally taken by the Turks, and made the capital of Turkey, in 1453. Historic Tales, Volume 11 (of 15) The Romance of Reality The ship was brought to dim half-life at minus one minute by Logan's agile fingers, and as the final countdown rasped in his headset, Mac felt his innards wrestle among themselves. Tight Squeeze It has a very short half-life, though; only about twelve minutes. The Colors of Space It is a suppression of the great lower centers, and a living a sort of half-life, almost entirely from the upper centers. Fantasia of the Unconscious The half-life must find its mate or, after a few brief days, it dies, leaving its line extinct. Woman in Modern Society I feel as though our life is already over, and that a grey half-life is beginning for us. The Darling and Other Stories To avoid more pain by accepting death was the aim of the former but for the latter it was a time, a half-life, before some renewal could begin. Tokyo to Tijuana: Gabriele Departing America They amused themselves some time with these bright and beautiful creatures, which appear to have but a half-life. The Swiss Family Robinson; or Adventures in a Desert Island This is measured in terms of "half-life"--the time required for one-half of the original substance to decay--which ranges from days to thousands of years for the bomb-produced radionuclides of principal interest. Worldwide Effects of Nuclear War: Some Perspectives And we told them certain ways by which they might bring a more speedy life to the soil; and this they were eager to do, being freshly alive after so long a time of half-life. The Night Land All, however, deteriorate much like radioactive material; they have a sort of half-life. How and When to Be Your Own Doctor The hero himself also, that dainty Chevalier des Grieux, with all his fervour, have, I think, but a half-life in them truly, from the first. Imaginary Portraits Probably the most serious threat is cesium-137, a gamma emitter with a half-life of 30 years. Worldwide Effects of Nuclear War: Some Perspectives For the most common uranium isotope, U-238, the half-life is 4.5 billion years, about the age of the solar system. Worldwide Effects of Nuclear War: Some Perspectives Other hazards are strontium-90, an electron emitter with a half-life of 28 years, and iodine-131 with a half-life of only 8 days. Worldwide Effects of Nuclear War: Some Perspectives Those types of produce I classify as very perishable probably do have a half-life of from 36 to 48 hours. How and When to Be Your Own Doctor Thus the half-life of this isotope is 14 billion years. Worldwide Effects of Nuclear War: Some Perspectives The concept of "half-life" is basic to an understanding of radioactive decay of unstable nuclei. Worldwide Effects of Nuclear War: Some Perspectives |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。