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Hormone concentrations in young mammals predict trade-offs later in life
Early development after birth can have profound effects on survival and reproduction. (2016-12-19)
Study shows no lead pollution in the oil sands region of Alberta
Recent research from the University of Alberta reveals that contrary to current scientific knowledge, there's no atmospheric lead pollution in the province's oil sands region. (2014-12-10)
Environmental toxins may be hurting North American eagles
New research indicates that bald and golden eagles in North America may be exposed to dangerously high levels of polybrominated diphenyl ethers, which are chemicals used in the production of a wide variety of textiles, plastics and electronics. (2014-11-04)
Measuring how arthritis patients respond to a common treatment
A new assay accurately measures how arthritis patients respond to treatment with the arthritis drug adalimumab, a finding that highlights potential strategies for predicting the drug's effectiveness in patients. (2019-01-30)
More than 10 percent of Americans have high concentrations of persistent pollutants
A study led by researchers at the IMIM (Hospital del Mar Medical Research Institute) and UAB (Universitat Autònoma de Barcelona) has analyzed the number of persistent organic pollutants (POPs) detected at high concentrations in the population of the US and found relationships with socioeconomic factors. (2016-10-06)
Honey samples worldwide test positive for neonicotinoids
A global sampling of honey finds 75 percent to be contaminated with neonicotinoid pesticides. (2017-10-05)
Spreading antibiotics in the soil affects microbial ecosystems
Antibiotics used extensively in intensive livestock production may be having an adverse effect on agricultural soil ecosystems. (2009-03-29)
Ozone can reduce a flower's scent that's critical for attracting pollinators
New research shows that high levels of ozone, which are predicted to increase in the atmosphere in the future, can dampen the scents of flowers that attract bees and other pollinators. (2015-09-08)
Early promise of blood marker to detect mesothelioma
Preliminary results of a study in this week's issue of The Lancet suggest that a blood test could be used in the future to identify people with mesothelioma-the usually deadly malignant tumor of mesothelial tissue surrounding the lungs, often caused by exposure to asbestos. (2003-11-13)
Ice age thermostat prevented extreme climate cooling
During the ice ages, an unidentified regulatory mechanism prevented atmospheric CO2 concentrations from falling below a level that could have led to runaway cooling, reports a study conducted by researchers of the ICTA-Universitat Autònoma de Barcelona and published online in Nature Geoscience this week. (2017-03-14)
The extent of toxin accumulation in birds off the coast of Canada
Toxins known as perfluoroalkyl substances have become virtually ubiquitous throughout the environment, and various national and international voluntary phase-outs and restrictions on these compounds have been implemented over the last 10 to 15 years. (2015-05-18)
The global distribution of freshwater plants is controlled by catchment characteristics
Unlike land plants, photosynthesis in many aquatic plants relies on bicarbonate in addition to CO2 to compensate for the low availability of CO2 in water. (2019-11-15)
Study finds increasing atmospheric concentrations of new flame retardants
Compounds used in new flame-retardant products are showing up in the environment at increasing concentrations, according to a recent study by researchers at Indiana University Bloomington. (2011-12-14)
Eating more often can reduce cholesterol levels
Eating frequently is associated with lower blood cholesterol concentrations, finds a study in this week's BMJ, suggesting that we need to consider not just what we eat but how often we eat. (2001-11-29)
River-shelf interactions during spring floods in the coastal Beaufort Sea
Invited research paper to be presented at the Fall American Geophysical Union conference in San Francisco, December 11-15. (2006-12-05)
Eating less and exercising more may reduce risk of breast cancer
A research pointer in this week's BMJ, suggests that there is an important link between the risk of breast cancer and nutritional status, through its influence on concentrations of ovarian hormones (oestrogen and progesterone) produced during the menstrual cycle. (2001-03-08)
Healthy, full-term babies use a different stress hormone than their mother
A University of Calgary researcher has identified how a steroid hormone may indicate infant distress during labour and delivery. (2013-06-15)
Pesticides: Improved effect prediction of low toxicant concentrations
Toxic substances such as pesticides can cause effects on sensitive individuals in concentrations up to ten thousand times lower than previously assumed. (2019-11-15)
Steroid hormone may be indicator of infant distress
During labor and delivery, infants preferentially secrete a different stress hormone than their mothers do, according to a new clinical study. (2013-06-15)
Beijing game for clean air challenge
With the Olympic Games in sight, the Chinese Government is committed to improving the air quality in Beijing, and has had measures in place since 1998 which have already made a difference. (2008-05-13)
The good Earth
The Naval Research Laboratory has received a patent for a faster, safer device for measuring concentrations of metals in soil in hazardous waste environments. (2000-09-07)
Placenta reflects arsenic exposure in pregnant women and fetuses, Dartmouth study shows
The placenta can be used to reliably measure arsenic exposure in pregnant women and how much of the toxic metal is transferred to their fetuses, a Dartmouth College study shows in the largest ever analysis of household drinking water arsenic and the mother-to-fetus connection. (2015-04-02)
Inflammatory markers linked with an increased risk of premature death in adults with COPD
Chronic obstructive pulmonary disease, or COPD, is characterized by a state of inflammation. (2015-03-16)
DDT in mother's blood predicts delays in daughters' pregnanies
A research letter in this week's issue of THE LANCET reports on the effect of the pesticide DDT and its by-product, DDE, on female reproductive capability. (2003-06-26)
Microplastics alter hatching, growth and feeding of European perch
Exposure to high concentrations of plastic particles inhibits hatching, decreases growth rates, and alters feeding preferences of European perch larvae, a new study shows, as well as prevents the fish from responding to predatory cues. (2016-06-02)
How mercury contamination affects reptiles in the Amazon basin
Mercury contamination in water and on land is of worldwide concern due to its toxic effects on ecosystems and human health. (2015-09-21)
A diet enriched with folate and B-vitamins may provide protection from heart disease
High levels of homocysteine in the blood can produce increased risk for stroke and cardiovascular disease. (1999-10-23)
Calculating phosphorus and calcium concentrations in meat and bone meal for pig diets
Following the drought of 2012, the prices of corn and soybean meal for livestock diets have increased significantly. (2013-04-23)
Drugs in wastewater contaminate drinking water
Both prescription and illegal drugs that are abused have been found in Canadian surface waters. (2015-07-20)
New non-toxic disinfectant could tackle hospital infections
A new disinfectant, Akwaton, that works at extremely low concentrations could be used in healthcare settings to help control persistent hospital-acquired infections such as Clostridium difficile. (2012-08-07)
Selenium deficiency promoted by climate change
As a result of climate change, concentrations of the trace element selenium in soils are likely to decrease. (2017-02-20)
The dynamics of mercury toxins in the oceans' food web
Methylmercury, a toxic form of mercury that is readily absorbed from the gastro-intestinal tract and can cause in a variety of health issues, poses a significant threat to marine animals at the top of the food web. (2015-08-18)
The evolution of antibiotic resistance, on a plate
Researchers have developed a large culturing device to track the evolution of bacteria as they mutate in the presence of antibiotics, revealing that, surprisingly, the fittest mutants were not those most likely to infiltrate higher antibiotic concentrations. (2016-09-08)
Finnish rivers transport carbon to the Baltic Sea at an increasing rate
The amount of carbon transported via Finnish rivers to the Baltic Sea has risen substantially in the past few decades. (2019-12-03)
Leptin And Body Composition Of Nigerians, Jamaicans, And US Blacks
Leptin is a hormone secreted by fat cells that regulates appetite and food intake. (1998-03-27)
Altered purine metabolism linked to depression
People suffering from major depressive disorder may have altered purine metabolism, according to a new study from the University of Eastern Finland and Kuopio University Hospital. (2016-05-17)
Future PM2.5 air pollution over China
There is a long way to go to mitigate future PM2.5 pollution in China based on the emission scenarios. (2016-11-23)
Sydney harbors deadly diet for sea creatures
Contaminated seaweeds in Sydney Harbour could be threatening the small animals that feed on them, according to a new study revealing that the harbor's seaweeds have the world's highest levels of copper and lead contamination. (2008-04-06)
Extending the coverage of PM2.5 monitoring to help improve air quality
A team of researchers in China has improved the method to obtain mass concentrations of particulate matter from widely measured humidity and visibility data. (2020-06-23)
Bacteria That Disable Sperm
Some men have low fertility because of microorganisms lurking in their semen, say researchers in Hungary. (1998-10-14)
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