PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Lab test commonly used to assess water toxicity

May not predict effects on field populations

2015-05-04
(Press-News.org) Hyalella azteca are invertebrates that are widely used for sediment and water toxicity studies. Investigators have found that H. azteca collected from sites influenced by agricultural/urban runoff are as much as 2-times less sensitive to pyrethroid insecticides than lab-grown H. azteca. In contrast, the insecticide sensitivities of H. azteca collected from undeveloped sites beyond the influences of agricultural/urban runoff were similar to those of lab-grown populations.

The results suggest that standard compliance testing of ambient waters, stormwater, and agricultural runoff and sediments using lab-grown H. azteca populations may not accurately reflect the health of resident H. azteca and the environments in which they live.

"Although laboratory tests can predict effects in the field, care should be taken when using the lab data for 303(d) listing if alternative field data indicate that the organisms of concern are not affected by the constituent of concern, such as pyrethroids," said Stephen Clark, lead author of the Environmental Toxicology and Chemistry study.

INFORMATION:



ELSE PRESS RELEASES FROM THIS DATE:

Study identifies desire and arousal as the main players in women's sexual health

2015-05-04
In a 4-year study of 178 pre- and 329 postmenopausal women, investigators found that women's sexual functioning was moderately stable over time. The main predictors of changes in sexual functioning and satisfaction were desire and arousal, highlighting their role as the main "players" in women's sexual health. The study also found that despite the potentially impairing effects of menopause and menopausal transition, sexual satisfaction and functioning in postmenopausal women can be improved and sexual problems can show spontaneous remission. "From a clinical standpoint, ...

Weight loss may increase risk of premature death in patients with rheumatoid arthritis

2015-05-04
In contrast to the general population, low body mass index has been associated with premature death in patients with rheumatoid arthritis -- a situation known as the "obesity paradox." A new Arthritis & Rheumatology study shows that weight loss, as opposed to low body mass index per se, is a strong predictor of mortality in these patients. The study also found that the greater the rate of weight loss, the higher the risk of early death. The findings suggest that there isn't a biologically protective role of obesity, and they indicate that patients with rheumatoid arthritis ...

Personal cues can have a strong effect on craving in individuals with addiction

2015-05-04
Unique person-specific cues--such as the presence of a specific friend or hearing a specific song--appear to have a robust effect on craving addictive substances, a recent study shows. The study also found that person-specific cues may have a longer effect on craving than more general substance-specific cues, such as the presence of bottles, syringes, or lighters. The study included 132 outpatients beginning treatment for alcohol, tobacco, cannabis, or opiate addiction. Using mobile technologies, participants were questioned 4 times per day relative to craving, substance ...

Youth just as likely to try e-cigarettes as smoking

2015-05-04
Young people are just as likely to try electronic cigarettes as smoking, according to a new report from the Propel Centre for Population Health Impact at the University of Waterloo. The findings, published today in Tobacco Use in Canada: Patterns and Trends, reveal that approximately 20 per cent of youth between the ages of 15 and 19 experiment with vaping, the same number who try cigarettes. "E-cigarettes have become increasingly popular among Canadians," said David Hammond, lead author on the report and a professor in the School of Public Health and Health Systems ...

Story Tips from the Department of Energy's Oak Ridge National Laboratory, May 2015

2015-05-04
BIOMETRICS - 3-D face analysis ... Law enforcement and national security agencies could benefit from an Oak Ridge National Laboratory technology able to determine a person's age, race and gender with high fidelity. "Normally, computers estimate age by looking for wrinkles or estimate gender by looking at specific two-dimensional distances or 2-D texture," said Ryan Tokola of ORNL's Imaging, Signals and Machine Learning Group. ORNL's system allows users to employ the same set of features to estimate age with an error of less than five years, gender with 89 percent accuracy ...

Patients with AIDS at increased risk of developing age-related macular degeneration

2015-05-04
(New York -- May 4, 2015) -- Patients with acquired immunodeficiency syndrome (AIDS) have a four-fold increase in their risk of developing intermediate-stage age-related macular degeneration (AMD) compared to people of the same age who are not infected with HIV, according to results from the Longitudinal Study of the Ocular Complications of AIDS (LSOCA) presented today at the 2015 ARVO Annual Meeting in Denver, CO. The results of the study, led by the National Eye Institute-funded Studies of the Ocular Complications of AIDS Research Group, were also published online in ...

Identifying species imperiled by the wildlife trade may require a trip to the market

Identifying species imperiled by the wildlife trade may require a trip to the market
2015-05-04
Scientists, conservationists and governments could have a new weapon in their struggle to gauge -- and halt -- the devastation of the wildlife trade on populations of prized animals: the very markets where the animals are bought and sold. Species that are disappearing as a result of the pet trade can be identified by changes in their market prices and trade volumes, a study led by researchers at Princeton University found. The researchers studied open-air pet markets on the Indonesian island of Sumatra and found that bird species that increased in price but decreased ...

Rumors have it

2015-05-04
Bad news, fans of rational political discourse: A study by an MIT researcher shows that attempts to debunk political rumors may only reinforce their strength. "Rumors are sticky," says Adam Berinsky, a professor of political science at MIT, and author of a paper detailing the study. "Corrections are difficult, and in some cases can even make the problem worse." More specifically, Berinsky found in an experiment concerning the Affordable Care Act (ACA) that rebuttals of political rumors about the supposed existence of "death panels" sometimes increased belief in the ...

Pollen and clouds: April flowers bring May showers?

2015-05-04
ANN ARBOR--The main job of pollen is to help seed the next generation of trees and plants, but a new study from the University of Michigan and Texas A&M shows that the grains might also seed clouds. The unexpected findings demonstrate that these wind-carried capsules of genetic material might have an effect on the planet's climate. And they highlight a new link between plants and the atmosphere. Pollen has been largely ignored by atmospheric scientists who study aerosols--particles suspended in the air that scatter light and heat and play a role in cloud formation. "The ...

Dulaglutide in type 2 diabetes: Hint of added benefit with short-acting insulin

2015-05-04
Since 2014 dulaglutide has been approved alone or in combination with other drugs for the treatment of adults with type 2 diabetes. The German Institute for Quality and Efficiency in Health Care (IQWiG) examined in a dossier assessment whether this new drug offers an added benefit over the appropriate comparator therapies. IQWiG found a hint of minor added benefit for the combination with short-acting insulin with or without metformin. In contrast, an added benefit of dulaglutide versus the respective appropriate comparator therapy is not proven for the combination with ...

LAST 30 PRESS RELEASES:

McGill discovery sheds new light on autism, intellectual disabilities

Cellular changes occur even below the hexavalent chromium limit

Study suggests a new way to curb social media’s body image toll

Plant doctor: An AI system that watches over urban trees without touching a leaf

Study tracks chromium chemistry in irradiated molten salts

Scientists: the beautiful game is a silver bullet for global health

Being physically active, even just a couple of days a week, may be key to better health

High-fat diet promote breast cancer metastasis in animal models

A router for photons

Nurses and AI collaborate to save lives, reduce hospital stays

Multi-resistance in bacteria predicted by AI model

Tinker Tots: A citizen science project to explore ethical dilemmas in embryo selection

Sensing sickness

Cost to build multifamily housing in California more than twice as high as in Texas

Program takes aim at drinking, unsafe sex, and sexual assault on college campuses

Inability to pay for healthcare reaches record high in U.S.

Science ‘storytelling’ urgently needed amid climate and biodiversity crisis

KAIST Develops Retinal Therapy to Restore Lost Vision​

Adipocyte-hepatocyte signaling mechanism uncovered in endoplasmic reticulum stress response

Mammals were adapting from life in the trees to living on the ground before dinosaur-killing asteroid

Low LDL cholesterol levels linked to reduced risk of dementia

Thickening of the eye’s retina associated with greater risk and severity of postoperative delirium in older patients

Almost one in ten people surveyed report having been harmed by the NHS in the last three years

Enhancing light control with complex frequency excitations

New research finds novel drug target for acute myeloid leukemia, bringing hope for cancer patients

New insight into factors associated with a common disease among dogs and humans

Illuminating single atoms for sustainable propylene production

New study finds Rocky Mountain snow contamination

Study examines lactation in critically ill patients

UVA Engineering Dean Jennifer West earns AIMBE’s 2025 Pierre Galletti Award

[Press-News.org] Lab test commonly used to assess water toxicity
May not predict effects on field populations