The compound bisphenol A, which is found in plastics and resins, has been under scrutiny as chemists attempt to determine whether it is a health hazard for humans. According to researchers in France, even weak concentrations of bisphenol A are sufficient to produce a negative reaction in human testicles, reducing the production of testosterone hormones.
Amid concerns over the potential health effects of existing flame retardants for home...
t's a chemical that's been in U.S. households for more than 40 years, from the body...
Researchers have cautioned that more work is needed to understand how microorganisms respond to the disinfecting properties of silver nanoparticles, increasingly used in consumer goods and for medical and environmental applications. Although nanosilver has effective antimicrobial properties against certain pathogens, overexposure to silver nanoparticles can cause other potentially harmful organisms to rapidly adapt and flourish.
For the first time, researchers from institutions around the country have conducted an identical series of toxicology tests evaluating lung-related health impacts associated with widely used engineered nanomaterials (ENMs). The study provides comparable health risk data from multiple laboratories, which should help regulators develop policies to protect workers and consumers who come into contact with ENMs.
Long-term exposure to air pollution may be linked to heart attacks and strokes by speeding up atherosclerosis, or "hardening of the arteries," according to a University of Michigan public health researcher and colleagues from across the U.S.
Nanotechnology typically describes any material, device, or technology where feature sizes are smaller than 100 nanometers in dimension. However, this new and uncharted direction in research provides a large spark for new product and drug delivery development. To achieve these discoveries, scientists must rely on specialized instruments and materials to drive their experiments and analysis.
Almost three weeks after China reported finding a new strain of bird flu in humans, experts are still stumped by how people are becoming infected when many appear to have had no recent contact with live fowl and the virus isn't supposed to pass from person to person.
The Food and Drug Administration says it has uncovered potential safety problems at 30 specialty pharmacies that were inspected in the wake of a recent outbreak of meningitis caused by contaminated drugs. The agency said its inspectors targeted 31 compounding pharmacies that produce sterile drugs, which must be prepared under highly sanitary conditions.
For decades, no one worried much about the air quality inside people’s homes. Then scientists at Lawrence Berkeley National Laboratory made the discovery that the aggregate health consequences of poor indoor air quality are as significant as those from all traffic accidents or infectious diseases in the United States. They are now working on turning those research findings into science-based solutions.
In 2011, Lake Erie experienced a record-breaking algae bloom that began in the lake's Western region in mid-July and eventually covered an area of 230 square miles. At its peak in October, the bloom had expanded to more than 1,930 square miles, three times greater than any other bloom on record. According to recent research, the bloom was triggered by long-term agricultural practices coupled with extreme precipitation, followed by weak lake circulation and warm temperatures.
A common test used to determine mercury exposure from dental amalgam fillings may significantly overestimate the amount of the toxic metal released from fillings, according to University of Michigan researchers. Scientists agree that dental amalgam fillings slowly release mercury vapor into the mouth. But both the amount of mercury released and the question of whether this exposure presents a significant health risk remain controversial.
A research group in Japan has recently discovered that it is possible to detect diluted ionic mercury in water with more than 10 times higher sensitivity than with the conventional spectroscopy method. Ionic mercury is a harmful substance when dissolved in rivers and lakes, even in trace amounts. In contrast to the conventional spectroscopic detection method, the infrared spectroscopy detection method was used for this method.
Millions of people in Bangladesh and neighboring countries are chronically exposed to arsenic-contaminated groundwater, which causes skin lesions and increases the risk of certain cancers. According to an international team of scientists, human activities are not the primary cause of arsenic found in groundwater in Bangladesh. They found instead that the arsenic is part of a natural process that predates any recent human activity, such as intensive pumping.
It's no secret that China is faced with some of the world's worst pollution. Until now, however, information on the magnitude, scope and impacts of a major contributor to that pollution—human-caused nitrogen emissions—was lacking. A new study has revealed that the problem is rooted in nitrogen.
By identifying two genes required for transforming inorganic into organic mercury, which is far more toxic, scientists today have taken a significant step toward protecting human health. The question of how methylmercury, an organic form of mercury, is produced by natural processes in the environment has stumped scientists for decades, but a team led by researchers at Oak Ridge National Laboratory has solved the puzzle.
In the same week that a team of researchers in France announced the harmful effects of bisphenol A (BPA) on hormone levels in human tissue, researchers in Texas have demonstrated through experiments that the BPA substitute bisphenol S also disrupts hormone activity at an extremely low level of exposure, and in an even more problematic way.
If you're reading this, odds are you've already used running water in your home today. But you're in a minority: Globally, at least a billion people have no nearby source of water, while of the remaining six billion or so, only 42% have running water in their homes or a tap in the yard, according to the World Health Organization. Now a new field experiment shows just how much access to clean water matters to people.
A new form of contraception could take an unexpected shape: electrically spun cloth with nanometer-sized fibers. These fibers, designed by a University of Washington team, can dissolve and release drugs, providing a cheap and discreet platform for protecting against unintended pregnancy, as well as HIV infection.
Results from field and lab tests have found that 7 to 9% of the kerosene in wick lamps—used for light in 250-300 million households without electricity—is converted to black carbon when burned. In comparison, only half of 1% of the emissions from burning wood is converted to black carbon. Kerosene is the primary source of light for more than a billion people in developing nations.
Scientists are reporting an increasing use of flame retardants in the main gathering spot for adults, children and family pets in the home—the couch. In recent study, Heather Stapleton and colleagues describe the first efforts to detect and identify the flame retardants applied to the foam inside couches found in millions of family rooms and living rooms across the U.S.
A major new initiative in the European Union is being launched to build a complete picture of how environmental pollutants influence health. Researchers are being asked to use smartphones equipped with GPS and environmental sensors to monitor study participants and their exposure to potential hazards. This information will be combined with blood and urine analysis to investigate whether exposure to risk factors leaves chemical fingerprints that can be detected in bodily fluids.
Overturning decades of conventional wisdom, researchers at Lawrence Berkeley National Laboratory have found that moderately high indoor concentrations of carbon dioxide can significantly impair people's decision-making performance. The results were unexpected and may have particular implications for schools and other spaces with high occupant density.
The system currently being used to test for mercury and its very toxic derivative, methyl mercury, is time-intensive, costly, and can only detect quantities at already toxic levels. Researchers at Northwestern University and in Switzerland have invented a device consisting of a strip of glass with a nanoparticle film attached that can detect heavy metals in quantities more than a million times smaller than is currently possible.
Mercury, when dumped in lakes and rivers, accumulates in fish, and often ends up on our plates. A Swiss-American team of researchers has devised a simple, inexpensive system based on nanoparticles, a kind of nano-velcro, to detect and trap this toxic pollutant as well as others. The particles are covered with tiny hairs that can grab onto toxic heavy metals such as mercury and cadmium.
Ornamental nursery and floral crops require micronutrients like iron, manganese, copper and zinc. But fertilizers that provide these micronutrients often include synthetic compounds that bind with the micronutrients to make them available to the roots. They also extract metals from sediments, contributing to heavy metals in runoff. A Dept. of Agriculture scientist has found a biodegradable alternative to these agents.
Professional athletic field managers maintain trimmed turfgrass with great precision, carefully painting crisp lines and colorful logos on their grass before each game. While these fields appear to be in perfect health, some field managers have noted deteriorating turfgrass beneath repeated paint applications. New research into the relationship between photosynthesis and latex paint suggests why.
Sewage sludge, wastewater and liquid manure are valuable sources of fertilizer for food production. Researchers in Germany have now developed a chemical-free, eco-friendly process that enables the recovered salts to be converted directly into organic food for crop plants.