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Warmer climates may increase pesticides' toxicity in fish

2015-06-01
(Press-News.org) In a study of the effects of increasing climate temperatures on the toxicity of 3 contaminants in different fish species, researchers found that all pesticides and industrial contaminants studied--endosulfan, chlorpyrifos, and phenol--became toxic in the upper 5oC range of species' temperature tolerance.

"Within this narrow range of temperatures, other simultaneous changes--such as reduced shading of the water surface as a result of clearing vegetation or increased toxicant exposure--may combine to significantly increase the vulnerability of fish to global warming," said Dr. Ronald Patra, lead author of the Environmental Toxicology and Chemistry study.

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Extra love and support doesn't make up for being a helicopter parent

2015-06-01
It's time for helicopter parents to land and stay grounded. New research by professors at Brigham Young University revealed that parental warmth cannot neutralize the consequences of helicopter parenting. Additionally, a lack of warmth makes the negative effects worse. Such negative effects include lower self-worth and higher risk behavior, such as binge drinking. "From our past work, we thought there might be something positive about helicopter parenting under certain conditions, but we're just not finding it," study author Larry Nelson said. The study, published ...

Cannabis use in male African pygmies linked to decreased risk of parasitic worm infection

2015-06-01
In a population of Congo Basin foragers called the Aka, 67% of men--but only 6% of women--use cannabis, and the practice seems to protect against infection with parasitic worms. The large sex difference, which is also seen in tobacco use, might be a consequence, in part, of women's avoidance of potentially toxic substances during childbearing years. The results provide evidence of a link between parasite infection and drug use, two of the developing world's great health problems, and they highlight the need for more research on the high rate of substance use in Aka ...

Recommendations address how to manage seizures in infants

2015-06-01
New recommendations offer insights on strategies for treating infants with seizures. In an Epilepsia report, child neurologists who are members of the International League Against Epilepsy note that intervening at the time of a febrile seizure does not alter the risk for subsequent epilepsy, and there is no evidence to support the use of antiepileptic drugs for simple febrile seizures. However, recurrent seizures warrant an urgent assessment, and a variety of antiepileptic drugs may benefit these patients. Unfortunately, there is no high level evidence to support the use ...

Inexperienced investors should take advantage of 'auto-pilot investing'

2015-06-01
COLUMBIA, Mo. -- For inexperienced investors with little knowledge about the investment process, it may be important to invest in funds that do not require much maintenance. Now, a researcher at the University of Missouri has found that investors with less investment knowledge are more likely to invest in target-date funds (TDFs). Michael Guillemette, an assistant professor of personal financial planning in the MU College of Human Environmental Sciences, says this is a positive trend which will help inexperienced investors invest safely without risking significant losses ...

Wearing high-heeled shoes may cause ankle muscle imbalance and injury

2015-06-01
Collegiate women who wore shoes with 10 cm high heels more than 3 times per week to their classes developed an imbalance of 4 functional ankle muscles. While wearing high-heeled shoes appeared to strengthen ankle muscles at first, prolonged use eventually caused an imbalance, which is a crucial predictor of ankle injury. "Therefore, it is clinically important for wearers of high heels to regularly perform ankle strengthening exercises, such as heel walking, toe tappers, and heel raises, and to limit the frequency of wearing high-heeled shoes as preventative measures," ...

New climate stress index model challenges doomsday forecasts for world's coral reefs

New climate stress index model challenges doomsday forecasts for worlds coral reefs
2015-06-01
Recent forecasts on the impacts of climate change on the world's coral reefs--especially ones generated from oceanic surface temperature data gathered by satellites--paint a grim picture for the future of the "rainforests of the sea." A newer and more complex model incorporating data from both environmental factors and field observations of coral responses to stress provides a better forecasting tool than the more widely used models and a more positive future for coral reefs, according to a new study by the Wildlife Conservation Society and other groups. The study ...

Organic agriculture more profitable to farmers

2015-06-01
PULLMAN, Wash.--A comprehensive study finds organic agriculture is more profitable for farmers than conventional agriculture. In spite of lower yields, the global study shows that the profit margins for organic agriculture were significantly greater than conventional agriculture. The results show that there's room for organic agriculture to expand and, with its environmental benefits, to contribute a larger share in feeding the world sustainably. Organic agriculture currently accounts for only one percent of agriculture globally. The study, published this week in the ...

Not so crowded house? New findings on global species richness

Not so crowded house? New findings on global species richness
2015-06-01
Planet Earth may contain millions fewer species than previously thought and estimates are converging, according to research led by Griffith University (Queensland, Australia). In a paper published by the US-based journal Proceedings of the National Academy of Sciences (PNAS), Professor Nigel Stork of Griffith's Environmental Futures Research Institute reveals findings that narrow global species estimates for beetles, insects and terrestrial arthropods. The research features an entirely new method of species calculation derived from samples of beetles from the comprehensive ...

New evidence emerges on the origins of life

New evidence emerges on the origins of life
2015-06-01
June 1, 2015 CHAPEL HILL, NC - In the beginning, there were simple chemicals. And they produced amino acids that eventually became the proteins necessary to create single cells. And the single cells became plants and animals. Recent research is revealing how the primordial soup created the amino acid building blocks, and there is widespread scientific consensus on the evolution from the first cell into plants and animals. But it's still a mystery how the building blocks were first assembled into the proteins that formed the machinery of all cells. Now, two long-time University ...

A new tool measures the distance between phonon collisions

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Today's computer chips pack billions of tiny transistors onto a plate of silicon within the width of a fingernail. Each transistor, just tens of nanometers wide, acts as a switch that, in concert with others, carries out a computer's computations. As dense forests of transistors signal back and forth, they give off heat -- which can fry the electronics, if a chip gets too hot. Manufacturers commonly apply a classical diffusion theory to gauge a transistor's temperature rise in a computer chip. But now an experiment by MIT engineers suggests that this common theory doesn't ...

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[Press-News.org] Warmer climates may increase pesticides' toxicity in fish