After more than 40 years of study, the U.S. government says it has found no evidence that common anti-bacterial soaps, which contain triclosan and other sanitizing agents, prevent the spread of germs. Regulators want the makers of Dawn, Dial, and other household staples to prove that their products do not pose health risks to consumers.
Blending ethanol into fuel to cut air pollution from vehicles carries a hidden risk that toxic or even explosive gases may find their way into buildings. The problems would likely occur in buildings with cracked foundations that happen to be in the vicinity of fuel spills. Vapors that rise from contaminated groundwater can be sucked inside; and, once there, trapped pools of methane could ignite and toxic hydrocarbons causing health issues.
Funded by prominent Silicon Valley investors and Microsoft founder Bill Gates, Hampton Creek Foods seeks to disrupt a global egg industry that backers say wastes energy, pollutes the environment, causes disease outbreaks and confines chickens to tiny spaces. The company, which just started selling a mayonnaise made without eggs, is part of a new generation of so-called food-tech ventures that aim to change the way we eat.
Chemical engineers at Rice Univ. have found a new catalyst that can rapidly break down nitrites, a common and harmful contaminant in drinking water that often results from overuse of agricultural fertilizers. Nitrites and their more abundant cousins, nitrates, are inorganic compounds that are often found in both groundwater and surface water. The compounds are a health hazard.
Colorado's proposal to curb air pollutants from oil and gas operations got praise from industry representatives and environmental activists Thursday at its first hearing. But both sides warned the Colorado Air Quality Control Commission that there will still be haggling over the particulars of three rule changes introduced this week.
Scientists have long known that phosphorus fuels growth of algae in lakes and streams. Wisconsin Sea Grant researchers have found that nitrogen levels are a factor in whether or not these algae—specifically, blue-green algae—produce toxins. The findings, published in PLOS ONE have parts of the scientific community buzzing.
An instrument on NASA's Lunar Reconnaissance Orbiter (LRO) has learned more than ever before about the high-energy hazards at and around the moon. These dangers are serious but manageable, and human exploration missions will rely on these measurements to know how much radiation to expect in deep space and how best to shield against it.
A new study shows that the reduction of pollution emissions from power plants in the mid-Atlantic is making an impact on the quality of the water that ends up in the Chesapeake Bay. The study confirms a decreased amount of emissions of nitrogen oxide from coal-fired power plants.
Researchers at Purdue Univ. have developed prototypes of a water disinfection system to take advantage of ultraviolet (UV) radiation from the sun, which is plentiful in many areas where clean water is lacking. Their water disinfection system pumps water through a UV-transparent pipe placed on a parabolic reflector, effectively magnifying the effect of UV radiation, which damages microorganism DNA.
For those wanting to keep their distance from health threats like E. coli-contaminated lettuce or the flu, there are two upcoming apps for that. Pacific Northwest National Laboratory hosted a competition last summer where graduate students used Android development tools and web-based analytics to design mobile apps that could help fight the threats of food-related illnesses and the flu.
With the rise of the iPhone, Android and other mobile devices has come a flood of applications designed to help people stay healthy. Food and Drug Administration officials say they will now begin regulating applications and gadgets that work with smartphones to take medical readings and help users monitor their health.
A study of data from hundreds of soil samples taken around six old water tower sites in southern Rhode Island finds that even when lead levels on the surface are low, concentrations can sometimes be greater at depths down to a foot. The findings inform efforts to assess the effect of lead paint from old water towers on surrounding properties.
More than one billion people worldwide rely on fish as an important source of animal protein, consuming low levels of methylmercury. Methylmercury compounds specifically target the central nervous system, but now researchers have combined synchrotron x-rays with methylmercury-poisoned zebrafish larvae to learn that they may also affect our vision.
Human activities are changing the basic chemistry of many rivers in the Eastern U.S., with potentially major consequences for urban water supplies and aquatic ecosystems, a Univ. of Maryland-led study has found. Over time spans of 25 to 60 years, two-thirds of the 97 streams and rivers reviewed in the study had become significantly more alkaline and none had become more acidic.
In a new study, biologists have compiled and analyzed all available data on the reaction of marine animals to ocean acidification. From this collection of 167 studies with data from more than 150 different species, they found that while the majority of animal species investigated are affected by ocean acidification, the respective impacts are specific and can vary widely from species to species.
Over the last few years, the use of nanomaterials for water treatment, food packaging, pesticides, cosmetics and other industries has increased. A growing concern is that these particles could pose a potential health risk has prompted a large number of studies, including recent work at the Univ. of Missouri that showed the retention of silver nanoparticles in pear skin, even after repeated washing.
An international team of researchers have recently showed that water purification membranes enhanced by plasma-treated carbon nanotubes are ideal for removing contaminants and brine from water. The study may lead to the next generation of portable water purification devices, which could be rechargeable and the size of a teapot.
Carbon monoxide poisoning is a significant problem for construction workers because it can build up quickly in enclosed spaces from use of gasoline-powered tools. New research calls for the use of a wearable computing system installed in a helmet to protect construction workers from this type of poisoning.
For decades, teams of Berkeley Lab scientists have investigated the ways that indoor air quality affects human health. In Berkeley Lab's test kitchen scientist Brett Singer and his team are measuring the pollutants emitted by cooking foods and evaluating how effective various range hoods are in capturing the pollutants.
China and Russia have halted imports of some New Zealand dairy products in response to a botulism scare, according to New Zealand government officials. New Zealand dairy giant Fonterra announced Saturday that up to 1,000 tons of infant formula, sports drinks and other products sold in seven countries could be tainted after tests turned up bacteria in whey protein that could cause botulism.
A study at the Univ. of Utah finds that more than 60% of antibiotic prescriptions are for types that kill multiple kinds of bacteria. Unfortunately, in more than 25% of cases such prescriptions are useless because the infection stems from a virus, which cannot be treated with antibiotics. This overuse of antibiotics has a number of downsides.
In an epidemic or a bioterrorist attack, the response of government officials could range from a drastic restriction of mobility to moderate travel restrictions in some areas or simple suggestions that people remain at home. Deciding to institute any measure would require officials to weigh the costs and benefits of action, but at present there’s little data to guide them. However, a new study comparing contagion rates may come in handy.
As many as 10% of combat wounds result in life threatening infections that ultimately lead to septicemia and/or sepsis. Battelle, in partnership with NxStage Medical Inc. and Aethlon Medical, has won a nearly $23 million contract from DARPA to develop a new medical device that would holistically treat for sepsis by removing blood and cleaning it in a manner similar to dialysis.
Rice Univ. nanotechnology researchers have unveiled a solar-powered sterilization system that could be a boon for more than 2.5 billion people who lack adequate sanitation. The “solar steam” sterilization system uses nanomaterials to convert as much as 80% of the energy in sunlight into germ-killing heat.
A family of molecules developed at Carnegie Mellon Univ. to break down pollutants in water is one step closer to commercial use. Recently published study results show that the molecules, which are aimed at removing hazardous endocrine disruptors from water sources, aren't endocrine disruptors themselves. They proved to be non-toxic to developing zebrafish embryos.