| 单词 | perchlorate |
| 例句 | Cyanobacteria is capable of growing in Martian conditions, which has the very real added benefit of neutralizing extremely toxic chemicals called perchlorates. Could we feed a city on Mars? 2023-01-27T05:00:00Z Once in the lab, the team modified the ionic liquid's formula, replacing the chlorine with perchlorate. Scientists unveil fire-safe fuel 2023-09-28T04:00:00Z The soil of Mars, for instance, contains perchlorate compounds that some Earth microbes can turn into chloride and oxygen. Cells Discovered Making ‘Dark Oxygen’ Underground 2023-08-22T04:00:00Z A federal appeals court ruled Tuesday that the Environmental Protection Agency must regulate perchlorate, reversing a Trump-era rollback on a drinking water contaminant linked to brain damage in infants. Court: EPA must regulate perchlorate, contaminant in water 2023-05-09T04:00:00Z Metallic powders such as aluminium often serve as the fuel, and ammonium perchlorate, which is the salt of perchloric acid and ammonia, is the most common oxidiser. Explainer: What is solid-fuel technology, and why is North Korea eager to develop it? 2023-04-14T04:00:00Z U.S. forces found over 70 tonnes of ammonium perchlorate which is commonly used to make rocket and missile fuel as well as explosives, the Fifth Fleet said in a statement. U.S. Navy intercepts 'massive' shipment of explosive material in Gulf of Oman 2022-11-15T05:00:00Z During a weeklong search, sailors discovered bags of ammonium perchlorate hidden inside of what initially appeared to be a shipment of 100 tons of urea. US Navy: 70 tons of missile fuel from Iran to Yemen seized 2022-11-14T05:00:00Z Perchloric acid, HClO4, forms when treating a perchlorate, such as potassium perchlorate, with sulfuric acid under reduced pressure. Chemistry 2019-02-14T00:00:00Z She called the EPA’s decision not to regulate perchlorate “arbitrary” and “capricious” and rejected the agency’s assertion that perchlorate was occurring at lower levels than previously thought. Court: EPA must regulate perchlorate, contaminant in water 2023-05-09T04:00:00Z That’s because Martian regolith is full of perchlorate, an oxidative compound that stunts plants’ growth and can be harmful to humans. Scientists Sprout First-Ever Seedlings in Apollo Moon Dirt 2022-06-02T04:00:00Z He canceled efforts to regulate perchlorate, a chemical that damages babies’ brains, in drinking water. Opinion | Glenn Youngkin is no moderate on the environment 2022-01-09T05:00:00Z Not coincidentally, the EPA, which has been monitoring perchlorate since 2001, has yet to set mandatory limits on it for drinking water, though it continues to consider a "roadmap" for doing so. The politics of water 2021-11-26T05:00:00Z For example, perchlorate is chlorate is chlorite is and hypochlorite is ClO−. Chemistry 2019-02-14T00:00:00Z The perchlorate decision was among those that Biden ordered reviewed at the start of his term. Court: EPA must regulate perchlorate, contaminant in water 2023-05-09T04:00:00Z High concentrations of perchlorate compounds, meaning containing chlorine, have been detected and confirmed on multiple occasions. Mars' weird geology is making Perseverance's job more complicated 2021-08-26T04:00:00Z Reversed the finding that perchlorate, a toxic chemical, must be regulated nationwide Read more » Tracking Biden’s environmental actions In addition, the Navy identified perchlorate in the groundwater in at least one site in Vieques, where it operated a training range on 14,500 acres until its closure in 2001. Report: Military cleanup in Puerto Rico islands slow-going 2021-03-26T04:00:00Z A typical propellant reaction in which solid aluminum is oxidized by ammonium perchlorate is represented by this equation: Chemistry 2019-02-14T00:00:00Z "A recent paper suggested that perchlorates — compounds toxic to many forms of life — may be generated by small-scale discharges." Scientists believe Mars may have mini-lightning storms from tiny dust clouds 2021-02-21T05:00:00Z “There are bacteria on Earth that enjoy perchlorates as a food,” Guinan says. Farming on Mars will be a lot harder than ‘The Martian’ made it seem 2020-11-27T05:00:00Z Reversed the finding that perchlorate, a toxic chemical, must be regulated nationwide Read more » Tracking Biden’s environmental actions "We suggest that the waters are hypersaline perchlorate brines, known to form at Martian polar regions and thought to survive for an extended period of time on a geological scale at below-eutectic temperatures." Mars has lakes with liquid water that could be home to life: study 2020-09-28T04:00:00Z Lovato said that the EPA’s decision probably will not affect perchlorate cleanup in Nevada. Nevada mulls EPA reversal of Obama era drinking water rules 2020-06-28T04:00:00Z In addition to not regulating, the E.P.A. overturned the underlying scientific finding that declared perchlorate a serious health risk for five million to 16 million people in the United States. E.P.A. Won’t Regulate Toxic Compound Linked to Fetal Brain Damage 2020-06-18T04:00:00Z Moving ahead with regulation ultimately fell to the Trump administration and, in 2018, the E.P.A. agreed to a court settlement requiring a final standard on perchlorate. E.P.A. Opts Against Limits on Water Contaminant Tied to Fetal Damage 2020-05-14T04:00:00Z In a letter to the EPA, Yasuda in August urged the agency to adopt the strongest possible curbs on the chemical, based on the “well-established harms of perchlorate ingestion for children.” EPA decides against limits on drinking water pollutant linked to health risks, especially in children 2020-05-14T04:00:00Z However, the actual regolith on Mars contains perchlorates that are dangerous to humans. How to Grow Vegetables on Mars 2020-05-10T04:00:00Z The agency determined that exposure to perchlorates at this level for more than 30 days would not cause harmful effects. Nevada mulls EPA reversal of Obama era drinking water rules 2020-06-28T04:00:00Z Earth-based experiments on plants exposed to the level of perchlorates on Mars indicate that most species suffer. Surviving Mars 2020-02-02T05:00:00Z Ms. Woods, the E.P.A. spokeswoman, declined to respond to a question about I.Q. damage from perchlorate. E.P.A. Opts Against Limits on Water Contaminant Tied to Fetal Damage 2020-05-14T04:00:00Z One of these stable molecules is a compound called perchlorate, which is widespread in Martian soil. Nasa probing oxygen mystery on Mars 2019-11-14T05:00:00Z Many scientists concluded that the results were too good to believe and that the findings might be explained by reactive chemicals such as perchlorates in the Martian soil. Looking for Life on Mars: Viking Experiment Team Member Reflects on Divisive Findings 2019-04-02T04:00:00Z Kamolnick said perchlorate levels are being managed in Nevada, but they may not be in other states. Nevada mulls EPA reversal of Obama era drinking water rules 2020-06-28T04:00:00Z Those that are resistant end up with high perchlorate concentrations in their structures. Surviving Mars 2020-02-02T05:00:00Z The Red Planet is a rich source of perchlorates—chemical compounds used in fertilizer and rocket fuel that are rarely formed naturally on Earth. Martian dust devils may create rare rocket fuel ingredient 2018-10-29T04:00:00Z Sulfur may have helped protect the organics even when the rocks were exposed at the surface to radiation and bleach-like substances called perchlorates. Building Blocks of Life Found on Mars 2018-06-07T04:00:00Z Combined with high-energy ultraviolet light and cosmic rays streaming in from space, perchlorates would destroy any organic material on the surface, leaving little to be seen by carbon-seeking landers and rovers. Curiosity Rover Uncovers Long-Sought Organic Materials on Martian Surface 2018-06-07T04:00:00Z The middle of the cylinder is filled with a powdered mixture of ammonium perchlorate and ammonium nitrate, the oxidants. A rocket that devours itself 2018-05-31T04:00:00Z Bacteria that eat perchlorates might also be used to cleanse the soil. If We Ever Get to Mars, the Beer Might Not Be Bad 2018-01-12T05:00:00Z Orbital ATK continues to study the possibility of building its own ammonium perchlorate plant and counters that the necessary testing can be done gradually, preserving ultimate savings. Orbital ATK Is Under White House Pressure for Foreign Purchase of Propellant 2017-12-29T05:00:00Z For the most part, Smith says, they've been able to accurately replicate Martian soil based on spectral imaging of the planet, but the faux soil is still missing one key compound found on Mars—perchlorates. Earthworms Reproduce in Simulated Mars Soil—a First 2017-11-28T05:00:00Z Centre for Astrobiology at the University of Edinburgh in Scotland — paints perchlorates in a different light. Toxic Compounds May Sterilize Martian Soil 2017-07-07T04:00:00Z Wadsworth’s research was driven by the discovery of powerful oxidants known as perchlorates in the Martian soil some years back. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z Cells bathed in radiation without the perchlorate experienced just a two-fold fall-off. Why Life on Mars May Be Impossible 2017-07-06T04:00:00Z The National Aeronautics and Space Administration also relies on ammonium perchlorate for its next-generation rockets, called SLS, eventually slated to take astronauts to Mars. Orbital ATK Is Under White House Pressure for Foreign Purchase of Propellant 2017-12-29T05:00:00Z In studies where worms were exposed to high levels of perchlorates, most did not survive. Earthworms Reproduce in Simulated Mars Soil—a First 2017-11-28T05:00:00Z The researchers exposed the bacterium Bacillus subtilis, a common spacecraft contaminant, to perchlorates and UV radiation at levels similar to those found at and near the Martian surface. Toxic Compounds May Sterilize Martian Soil 2017-07-07T04:00:00Z Chris McKay, a planetary scientist at Nasa Ames Research Center in California, said the study was “a big step forward” in understanding the ramifications of finding high levels of perchlorate on Mars. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z The irradiated cells in the perchlorate solution were completely sterilized within 30 seconds. Why Life on Mars May Be Impossible 2017-07-06T04:00:00Z As the leading U.S. maker of solid rocket motors, Orbital ATK currently consumes about half the domestic supplies of ammonium perchlorate. Orbital ATK Is Under White House Pressure for Foreign Purchase of Propellant 2017-12-29T05:00:00Z "The plant studies assume that you remediated the perchlorate," Smith says. Earthworms Reproduce in Simulated Mars Soil—a First 2017-11-28T05:00:00Z That’s why he and his colleagues — including Jesse Sabatini — are working hard to develop compounds to replace perchlorates; some of them are now being used in red, green, and yellow signal flares. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Writing in Scientific Reports, the researchers say that the inhospitable conditions on Mars are caused by a “toxic cocktail of oxidants, iron oxides, perchlorates and UV irradiation.” Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z Wadsworth and Cockell first steeped the bacteria in a watery solution of magnesium perchlorate, the type most commonly found on Mars, and in roughly the same concentrations. Why Life on Mars May Be Impossible 2017-07-06T04:00:00Z All of those weapon systems will depend on ammonium perchlorate. Orbital ATK Is Under White House Pressure for Foreign Purchase of Propellant 2017-12-29T05:00:00Z Microbes survive well in perchlorates, and it's still possible for plants to grow in soil containing the substance, both Wamelink and Smith say. Earthworms Reproduce in Simulated Mars Soil—a First 2017-11-28T05:00:00Z There’s also a push to find new coloring agents that still shine brightly without perchlorate’s added boost. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z The briny patches would be likely to concentrate perchlorates, making the streaks even more toxic than the surrounding soil. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z To approximate Mars more closely, the researchers next deposited the cells within simulated rocks—actually silicate disks—in a dry perchlorate environment. Why Life on Mars May Be Impossible 2017-07-06T04:00:00Z The company also pays for an environmental-protection fund, new public recreational facilities and, more recently, for scientists and expertise to purify a city well Nestlé found to be tainted by perchlorate, a thyroid toxin. Where Nestlé guzzles water, local residents doubt claims of negligible impact 2017-05-25T04:00:00Z To both Wamelink and Smith, figuring out a natural process to remove perchlorate from Martian soil remains the largest hurdle in the way of growing a sustainable agricultural system on the planet. Earthworms Reproduce in Simulated Mars Soil—a First 2017-11-28T05:00:00Z Still, the best perchlorate replacements are expensive to make — which is why these advances, like the entertainment industry’s smokeless fireworks, are still limited to niche markets. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Further tests found that the UV rays broke down the perchlorate into other chemicals, namely hypochlorite and chlorite, and it is these that appear to be so destructive to the bacteria. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z The company also pays for an environmental protection fund, new public recreational facilities and, more recently, for scientists and expertise to purify a city well Nestlé found to be tainted by perchlorate, a thyroid toxin. Where Nestlé Guzzles Water, Locals Doubt Claims of Negligible Impact 2017-05-24T04:00:00Z Shufeng Song at Chongqing University in China and his colleagues developed a hybrid solid electrolyte for sodium batteries by combining solid polyethylene oxide, sodium perchlorate and silica with an ionic liquid. Energy: Sodium battery packs a punch : Nature : Nature Research 2017-03-21T04:00:00Z All the molecules were thought to stem from reactions with perchlorates in the oven, making their precursors mysterious. Mars rover steps up hunt for molecular signs of life 2017-02-02T05:00:00Z Toxic recipe Another ingredient in fireworks, called perchlorate, helps the fuel combust and makes the colors shine more brightly. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Hints of perchlorates first showed up in tests performed by Nasa’s Viking lander missions 40 years ago, but were confirmed recently by the space agency’s Phoenix lander and Mars rover, Curiosity. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z The Phoenix lander in 2008 found the chemical perchlorate, an oxidant that might explain the sterile surface. NASA’s 1976 Viking mission to Mars did everything right — except find Martians 2016-06-18T04:00:00Z In 2011, reversing a Bush administration decision, the agency announced its intention to set a federal standard for perchlorate. In U.S. drinking water, many chemicals are regulated — but many aren’t 2016-06-09T04:00:00Z Martian soil is saturated with perchlorate, salts rich in oxygen. Mars rover steps up hunt for molecular signs of life 2017-02-02T05:00:00Z As with air pollution, it’s not completely clear the extent to which fireworks displays contaminate water systems with perchlorate. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Many scientists suspected that perchlorates would be toxic for microbial Martians, but in theory at least, alien bacteria might find a way to use the chemicals as an energy source. Mars covered in toxic chemicals that can wipe out living organisms, tests reveal 2017-07-06T04:00:00Z The agency says perchlorate is used in fireworks and is a common component of rocket fuels and explosives. Fireworks likely source of Mount Rushmore water pollution 2016-05-02T04:00:00Z The salts known as perchlorates that lower the freezing temperature of water at the R.S.L.s, keeping it liquid, can be consumed by some Earth microbes. Mars Is Pretty Clean. Her Job at NASA Is to Keep It That Way 2015-10-05T04:00:00Z McKay notes that the type of salts near the Martian streaks, called perchlorates, form different watery mixtures than the salts we’re most used to on Earth. Water on Mars: What Does It Really Mean? 2015-09-29T04:00:00Z For the military, which uses pyrotechnics to mimic actual battlefield conditions in training simulations, perchlorate contamination of groundwater can shut down training operations. How Hollywood and the Army are shaping the future of fireworks 2017-07-04T04:00:00Z Traces of hydrated salts and slopes resembling erosion on Martian hills indicate that salty, perchlorate water flows along the surface in warmer seasons. Life on Mars? NASA Says It's a Possibility 2015-09-28T04:00:00Z The less-exciting option is that the perchlorates absorb humidity out of the atmosphere, concentrating it until it pools and trickles. What the Modern Presence of Water on Mars Means 2015-09-28T04:00:00Z The instrument saw the signatures of magnesium perchlorate, magnesium chlorate and sodium perchlorate—all hydrated salts that contain water and require water to form. Water Flows on Mars Today, NASA Announces 2015-09-28T04:00:00Z They say the salts are mostly likely magnesium perchlorate, magnesium chlorate, and sodium perchlorate. Dark streaks on Mars are definitely wet, NASA says 2015-09-28T04:00:00Z In a paper published in the journal Nature Geoscience, Dr. McEwen and other scientists identified waterlogged molecules — salts of a type known as perchlorates — in readings from orbit. Signs of Liquid Water Found on Surface of Mars, Study Says 2015-09-28T04:00:00Z They are salts - magnesium perchlorate, chlorate and chloride - that can drop the freezing point of water by 80 degrees and its vaporisation rate by a factor of 10. Martian salt streaks 'painted by liquid water' - BBC News 2015-09-28T04:00:00Z “We need to determine the temperature of the perchlorates.” What the Modern Presence of Water on Mars Means 2015-09-28T04:00:00Z “Chromium, lead, tungsten, nickel, cadmium, cyanide, ammonium perchlorate, the Navy’s own environmental impact statement says there is a high risk of chemical exposure to fish.” The U.S. Navy’s brutal new war on the Arctic 2015-05-24T04:00:00Z The most common violations were for high levels of such contaminants as arsenic, nitrates, naturally occurring radioactive minerals and perchlorates, which are natural and man-made chemicals used in rocket fuel and explosives, the report said. Arsenic, nitrates among pollutants in California drinking water: report 2015-02-18T05:00:00Z SAM heats its samples for analysis and this causes changes in the structures of the organic compounds because of the presence of perchlorate minerals in Martian rocks and soils. Mysterious Methane Spike Provides Tantalising Clue To Life On Mars 2014-12-16T05:00:00Z Hynek says NASA’S Phoenix polar lander did observe droplets of liquid water associated with inorganic perchlorate salts, all at high latitudes. 5 Top Landing Sites For A Manned Mission To Mars 2014-12-09T05:00:00Z But on this mission, team members knew to look for a salt called perchlorate that has been demonstrated on Earth to destroy or transform organics in the presence of heat. (Stronger) Signs of Life on Mars 2014-12-08T05:00:00Z The research is the first to link pregnant women's perchlorate levels to their babies’ brain development. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z And both NASA’s Phoenix and Curiosity missions found salts called perchlorates sprinkled around the Martian surface. Martian Soil Salts May Make Water Ice All Wet 2014-07-25T04:00:00Z Filled with propellant mixed from fertilizer, oxidizer, ammonia perchlorate, aluminum powder and other ingredients. From Gaza, an Array of Makeshift Rockets Packs a Counterpunch 2014-07-17T04:00:00Z One of the two teens charged admitted buying 15 pounds of potassium perchlorate for LaDue, and both admitted helping him make small explosives that they tested in Waseca, according to criminal complaints. Teens charged with helping Minnesota school suspect test bombs 2014-06-20T04:00:00Z “But with Phoenix, we were flummoxed by perchlorate,” said Smith. Puzzle Of Mars Life May Persist For Another Generation 2014-05-30T04:00:00Z If perchlorate did reduce the babies’ cognitive function, it would be a time-sensitive event, he said. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z Environmental Protection Agency proceed with appropriate regulation of perchlorate in waterways. Pregnant women should take iodide supplement: docs 2014-05-26T04:00:00Z The $5.15 billion settlement will fund a wide array of projects, including $1.1 billion to address the perchlorate contamination in Nevada, the litigation trust said in a statement. Anadarko Petroleum settles U.S.-wide clean-up case for $5.15 billion 2014-04-04T00:14:50Z Reed ordered sulfur powder, red iron oxide, potassium perchlorate, magnesium ribbons, potassium nitrate powder and other materials, prosecutors said. Ex-paramedic in Texas fertilizer blast sentenced in unrelated case 2013-12-04T22:58:46Z Federal prosecutors said Reed purchased sulfur powder, red iron oxide, potassium perchlorate, magnesium ribbons, ammonium, perchiorate, charcoal air float and potassium nitrate powder. Ex-paramedic in Texas fertilizer blast pleads guilty to conspiracy 2013-10-10T23:11:14Z It’s possible, however, that the perchlorate acted directly on fetal hormones since it is transmitted across the placenta. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z One of the Phoenix instrument suites, MECA, was able to look for key chemical signatures in the resulting muddy soup, and the signature of perchlorate was quite clear. Viewpoint: Mars - what we've learnt in five years 2013-05-25T00:12:50Z This is the first archaeon known to feed on perchlorate but it is not the first microbe found to do so. New Extremophile Breathes Rocket Fuel 2013-04-04T20:15:00.677Z Mars also apparently is covered with chemicals, known as perchlorates, that consume organics. Mars had the right stuff for life, scientists find 2013-03-13T08:57:12Z What’s more, new analyses of data from Curiosity’s predecessor, Opportunity, suggest that the red planet’s surface also contains a highly reactive chemical called oxychlorate, an intermediary between perchlorate. ScienceShot: Looking for Life on Mars? Dig Deeper 2013-02-15T23:08:54Z Previous research shows it’s possible: A 2010 study of a half million California babies linked estimated perchlorate exposure to an increase in thyroid stimulating hormones, which indicates a drop in thyroid hormones. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z But a number of lines of research indicate that perchlorates, a form of salt found in Martian soils by the Phoenix lander in 2008, may play a key role in sustaining liquids on Mars. The New Way to Look for Mars Life: Follow the Salt 2013-02-06T19:45:03.323Z New Extremophile Breathes Rocket Fuel Tiny scoops of Martian soil analyzed by the Curiosity rover turned up perchlorate among other things. New Extremophile Breathes Rocket Fuel 2013-04-04T20:15:00.677Z Today, traces of perchlorate are found in the bloodstreams of just about every human on the planet. Perchlorate in Drinking Water Raises Health Concerns 2012-12-21T16:15:00.300Z Some of the chlorine seen by Sam in the first tests is suspected to have come from perchlorates in the soil - possibly calcium perchlorate. Rover's big lab up and running 2012-12-04T02:50:53Z The American Water Works Association, which would not comment on the new study, advocated for more information on iodine intake instead of perchlorate regulation in a 2012 letter to the EPA. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z Intriguingly, the process is asymmetrical—preliminary laboratory data presented at the conference demonstrated that perchlorate salts deliquesce and effloresce at very different humidity levels. The New Way to Look for Mars Life: Follow the Salt 2013-02-06T19:45:03.323Z The chlorine points to the presence of chlorine compounds known as perchlorates that had been discovered in Mars's polar regions by the NASA's Phoenix Mars lander in 2008. The Lede Blog: Mars Rover Discovery Revealed 2012-12-04T21:19:40Z Besides its potential to cause endocrine system and reproductive problems, perchlorate is considered a “likely human carcinogen” by the U.S. Perchlorate in Drinking Water Raises Health Concerns 2012-12-21T16:15:00.300Z At a hastily arranged news conference, Dr. Smith revealed the actual news: chemicals known as perchlorates had been found in the soil. Undisclosed Finding by Mars Rover Fuels Intrigue 2012-11-28T01:30:26Z The researchers didn’t measure the newborns’ hormone levels, so they couldn’t confirm that perchlorate exposure altered them. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z The Phoenix Mars lander discovered perchlorates in the Martian soil near the north pole in 2008. Curiosity, NASA Rover, Ready for Mars Landing 2012-07-30T19:09:45Z Potassium perchlorate, an essential oxidant in many fireworks, is under scrutiny by the US Environmental Protection Agency because it promotes thyroid dysfunction and causes birth defects. Green Fireworks Environmentally Safe, That is 2012-07-04T19:15:08.040Z He added a perchlorate solution to the roots of seedlings grown using hydroponics. Meet the Science in Action Finalists 2012-05-21T17:45:00.227Z In 2008, NASA’s Phoenix lander found chemicals known as perchlorates in the Martian soil. Aboard Mars Curiosity Rover, Tools to Plumb a Methane Mystery 2011-11-22T18:47:24Z While this study took place in Europe, perchlorate exposure is “pretty much ubiquitous,” Pearce said. Lower IQ in Children Linked to Chemical in Water 2014-09-30T04:00:00Z Sam’s ovens are hotter than the ones on the Vikings and should destroy the perchlorates before they destroy the organics, said Paul R. Mahaffy, the principal investigator of the Sam instrument. Curiosity, NASA Rover, Ready for Mars Landing 2012-07-30T19:09:45Z That was perchlorate, a component of rocket fuel; the E.P.A., reversing a controversial Bush administration decision, announced in February that it would begin regulating it. Green Blog: Impasse Persists on Drugs in Drinking Water 2011-09-09T11:56:26Z Potassium and sodium perchlorates and permanganates make similar but slightly less sensitive explosive mixtures with the above-mentioned substances. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z On top of perchlorates, some of the color-creating chemicals in fireworks can harm health. What Makes Them Go Boom? Our Favorite Explainers on the Science of Fireworks 2011-06-30T21:15:00.257Z Brown was grinding up chunks of nickel hydrazine perchlorate — using a hundred times the recommended amount — when it detonated. A death in the lab 2011-04-20T17:20:24.150Z A Government Accountability Office report also found that the Department of Defense - which, along with NASA, is a heavy user of perchlorate - sought to derail any perchlorate standards. EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z In 2008, the Bush Administration concluded that perchlorate did not pose a significant health threat, causing EPA to seek advice from outside experts. EPA to Regulate Rocket Fuel Chemical in Drinking Water 2011-02-02T22:42:28Z Finely divided metals such as aluminium or magnesium give also with permanganates, chlorates or perchlorates sensitive and powerful explosives. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z Wednesday’s decision to begin regulating perchlorate reversed a 2008 finding by the George W. Bush administration that a nationwide standard for the chemical was unnecessary and would do little to reduce risks to human health. Green: E.P.A. Plans Limits on Chemicals in Water 2011-02-02T16:18:07Z The perchlorate standard is eight years in the making. EPA to limit rocket fuel chemical in tap water 2011-02-02T15:29:46Z A 2006 Food and Drug Administration study also found perchlorate in 74 percent of a wide range of food items it tested. EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z Bush’s EPA declined to establish rules for perchlorate. EPA to Set First Standards for Perchlorate in Water 2011-02-02T15:30:02Z A few chlorates, perchlorates, permanganates and chromates almost complete the list. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 "Evangelical Church Conference" to "Fairbairn, Sir William" 2011-07-16T02:00:16.387Z Military contractors, for example, said that regulations on perchlorate, which has been associated with stunted central nervous system development, would cost them billions of dollars in cleanup costs. That Tap Water Is Legal but May Be Unhealthy 2009-12-17T17:25:00Z Then in 2008, NASA’s Phoenix Mars Lander unexpectedly found a chlorine chemical, perchlorate, in the planet’s arctic soil. Accepted Notion of Mars as Lifeless Is Challenged 2010-09-04T02:09:00Z In October 2008, the Bush administration bucked the advice of its own EPA scientists and announced that it would not regulate perchlorate. EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z The propellant is a mix of aluminum, ammonia perchlorate, a polymer called polybutadiene acrylonitrile, epoxy and iron oxide poured into cylindrical steel casings 12 feet wide, almost like cake batter into pans. NASA Tests Engine With an Uncertain Future 2010-08-30T21:30:00Z One of the most startling findings of Phoenix was the discovery in the Martian soil of perchlorate, an oxidizing chemical on Earth that nourishes some microbes but is potentially toxic to others. NASA calls it quits for Mars Phoenix lander 2010-05-25T01:26:00Z Today, the Safe Drinking Water Act still does not regulate perchlorate or more than two dozen other substances that Dr. Preuss’s department has analyzed over the last eight years. That Tap Water Is Legal but May Be Unhealthy 2009-12-17T17:25:00Z In the new experiments, the scientists heated a mixture of perchlorate with soil from the Atacama Desert in Chile, often considered the closest thing on Earth to Mars. Accepted Notion of Mars as Lifeless Is Challenged 2010-09-04T02:09:00Z A 2010 Government Accountability Office study reported perchlorate contamination at 70 percent of Department of Defense facilities. EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z The lander also detected traces of perchlorate in the soil. NASA confirms demise of Phoenix Mars spacecraft 2010-05-25T04:00:00Z High-quality carbon filters can get rid of contaminants such as asbestos, lead, mercury and disinfection byproducts, while more-expensive reverse osmosis filters will also remove inorganic pollutants including nitrates and perchlorate. Bridging the water divide: It's not only about taste 2010-05-18T04:00:00Z A study published last week by the Centers for Disease Control and Prevention found traces of perchlorate in every person examined by researchers. That Tap Water Is Legal but May Be Unhealthy 2009-12-17T17:25:00Z He noted that the experiment also detected freon, which was certainly a contaminant, and that the presence of perchlorate at the Viking sites, far from where the Phoenix landed, was speculation. Accepted Notion of Mars as Lifeless Is Challenged 2010-09-04T02:09:00Z A group funded by rocket manufacturers, the Perchlorate Information Bureau, objected to the decision, writing in a statement that "a national perchlorate standard is not needed and would not provide a meaningful public health benefit." EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z "Although low-level perchlorate exposure was ubiquitous in the pregnant women we studied, perchlorate exposure was not associated with alterations in their thyroid function." Perchlorate not tied to pregnancy thyroid problems 2010-05-13T19:44:00Z Perchloric acid is best prepared by distilling potassium perchlorate with concentrated sulphuric acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" In a statement, the E.P.A. said that standards for trichloroethylene and perc were under examination, and that a decision regarding perchlorate would be issued next year. That Tap Water Is Legal but May Be Unhealthy 2009-12-17T17:25:00Z It will carry an experiment that will be able to separate perchlorates from organic molecules and thus allow it to identify the organics without destroying them. Accepted Notion of Mars as Lifeless Is Challenged 2010-09-04T02:09:00Z That means that fetuses are at highest risk for perchlorate damage, said Lynn Goldman, dean of the School of Public Health at George Washington University. EPA reverses Bush-era water safety standards, will regulate contaminants 2011-02-02T23:47:02Z But in the new study, researchers found no relationship between urine perchlorate levels and thyroid function among more than 1,600 pregnant women who were typically iodine-deficient. Perchlorate not tied to pregnancy thyroid problems 2010-05-13T19:44:00Z The salts of the acid are known as the perchlorates, and are all soluble in water; the potassium and rubidium salts, however, are only soluble to a slight extent. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Thus the chlorine oxyacids enumerated above form salts named respectively hypochlorites, chlorites, chlorates and perchlorates. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Among the ingredients are barium nitrate, potassium perchlorate, powdered aluminum, powdered magnesium, potassium nitrate, and sulphur. Artificial Light Its Influence upon Civilization The alkaline perchlorates are isomorphous with the permanganates. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" Overall, Pearce's team found no correlation between the women's urine perchlorate levels and their thyroid hormone levels. Perchlorate not tied to pregnancy thyroid problems 2010-05-13T19:44:00Z Potassium perchlorate, KClO4, can be obtained by carefully heating the chlorate until it first melts and then nearly all solidifies again. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" |
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