Nanoparticles are becoming ubiquitous in food packaging, personal care products and are even being added to food directly. But the health and environmental effects of these tiny additives have remained largely unknown. A new study now suggests that nanomaterials in food and drinks could interfere with digestive cells and lead to the release of the potentially harmful substances to the environment. The report on dietary supplement drinks containing nanoparticles was published in the journal ACS Sustainable Chemistry & Engineering. Robert Reed and colleagues note that food ...

(Boston) – Despite conventional wisdom among gardeners, foresters and botanists that woody plants all "leaf out" at about the same time each spring, a new study organized by a Boston University biologist found a surprisingly wide span of as much as three months in leaf-out times. Significantly, observations the past two springs of 1,597 woody plants in eight botanical gardens in the U.S., Canada, Germany and China suggest that species differences in leaf-out times could impact the length of the growing season and the activities of birds, insect and other animals and therefore ...

TAMPA, Fla. (June 18, 2014) – The current special issue of Technology and Innovation is devoted to articles on both innovations in rural regions and general articles on technology and innovation, including an article from the National Academy of Inventors (NAI) by McDevitt et al. that discusses the value of technology transfer for universities beyond money. The five papers in this special issue of Technology and Innovation dealing with innovations in rural regions include an editorial, an analysis of the value of networks for European organic farmers and conventional ...

New research, led by scientists at the University of Southampton, has found that neurogenesis, the self-repairing mechanism of the adult brain, can help to preserve brain function in neurodegenerative diseases such as Alzheimer's, Prion or Parkinson's. The progressive degeneration and death of the brain, occurring in many neurodegenerative diseases, is often seen as an unstoppable and irrevocable process. However, the brain has some self-repairing potential that accounts for the renewal of certain neuronal populations living in the dentate gyrus, a simple cortical region ...

CAMBRIDGE, MA -- American children learn the meanings of number words gradually: First they understand "one," then they add "two, "three," and "four," in sequence. At that point, however, a dramatic shift in understanding takes place, and children grasp the meanings of not only "five" and "six," but all of the number words they know. Scientists have also seen this pattern in children raised speaking other languages, including Japanese and Russian. In all of these industrialized nations, number learning begins around age 2, and children fully understand numbers and counting ...

Leesburg, VA, June 17, 2014—In community-based radiology practice, mammography screening with 3D digital breast tomosynthesis (DBT) yielded lower recall rates, an increased overall cancer detection rate, and an increased detection rate for invasive cancer compared with 2D digital mammography (DM). In the largest report to date, researchers at Washington Radiology Associates, PC, with offices in Washington, DC; Virginia; and Maryland, conducted a study of more than 59,000 patients. The results were striking: an increase in the detection rate for cancer overall of 28.6% ...

INDIANAPOLIS -- Young adult men who watched more violence on television showed indications of less mature brain development and poorer executive functioning, according to the results of an Indiana University School of Medicine study published online in the journal Brain and Cognition. The researchers used psychological testing and MRI scans to measure mental abilities and volume of brain regions in 65 healthy males with normal IQ between the age of 18 and 29, specifically chosen because they were not frequent video game players. Lead author Tom A. Hummer, Ph.D., assistant ...

Anglers in North Carolina and Virginia who are looking for privacy at good fishing spots should head for the mountains, according to a Virginia Tech study of the capacity, quality, and demand of freshwater recreational fishing sites in the two states. "Our objective was to map a cultural ecosystem service by identifying the key features that influence anglers' enjoyment, such as environmental quality, accessibility, and fish abundance," said Amy Villamagna, a research scientist with the College of Natural Resources and Environment's fish and wildlife conservation department. ...

The inks on historical documents can hold many secrets. Its ingredients can help trace trade routes and help understand a work's historical significance. And knowing how the ink breaks down can help cultural heritage scientists preserve valuable treasures. In a study published in the Journal of the American Chemical Society, researchers report the development of a new, non-destructive method that can identify many types of inks on various papers and other surfaces. Richard Van Duyne, Nilam Shah and colleagues explain that the challenge for analyzing inks on historical ...

In 2006, Austin, Texas, became the first city in the country to ban a commonly used pavement sealant over concerns that it was a major source of cancer-causing compounds in the environment. Eight years later, the city's action seems to have made a big dent in the targeted compounds' levels — researchers now report that the concentrations have dropped significantly. They published their study in the ACS journal Environmental Science & Technology. Peter C. Van Metre and Barbara J. Mahler point out that in 2005, researchers figured out that pavement sealants made from coal ...

Sexting among youth is more prevalent than previously thought, according to a new study from Drexel University that was based on a survey of undergraduate students at a large northeastern university. More than 50 percent of those surveyed reported that they had exchanged sexually explicit text messages, with or without photographic images, as minors. The study also found that the majority of young people are not aware of the legal ramifications of underage sexting. In fact, most respondents were unaware that many jurisdictions consider sexting among minors – particularly ...

The species diversity in soil fauna has been studied in temperate regions for more than 50 years, but with scarcely any mention of thrips. This lack of reference to thrips raises the question whether or not litter-dwelling thrips are distributed only in tropical and sub-tropical regions. To answer this question a total 150 leaf litter samples were collected from 6 natural reserves located in three climatic regions, temperate, subtropical and tropical, along a 4100 km latitudinal gradient in East China. The survey was done over a four-year period by Dr Jun Wang, who is ...

Children who spend more time in less structured activities—from playing outside to reading books to visiting the zoo—are better able to set their own goals and take actions to meet those goals without prodding from adults, according to a new study by the University of Colorado Boulder. The study, published online in the journal Frontiers in Psychology, also found that children who participate in more structured activities—including soccer practice, piano lessons and homework—had poorer "self-directed executive function," a measure of the ability to set and reach goals ...

A new register-based study from Karolinska Institutet in Sweden shows that drug therapy for ADHD does not entail an increased risk of suicide attempts or suicide, as was previously feared. The results are published in the British Medical Journal (BMJ). "Our work in several ways shows that most likely there is no link between treatment with ADHD drugs and an increased risk of suicide attempts or suicide. The results rather indicate that ADHD drugs may have a protective effect," says Henrik Larsson, researcher at the Department of Medical Epidemiology and Biostatistics, ...

Cleveland, Ohio - Scientists have named a new species of horned dinosaur (ceratopsian) based on fossils collected from Montana in the United States and Alberta, Canada. Mercuriceratops (mer-cure-E-sare-ah-tops) gemini was approximately 6 meters (20 feet) long and weighed more than 2 tons. It lived about 77 million years ago during the Late Cretaceous Period. Research describing the new species is published online in the journal Naturwissenschaften. Mercuriceratops (Mercuri + ceratops) means "Mercury horned-face," referring to the wing-like ornamentation on its head ...

Frankfurt am Main, Germany, June 18th 2014. Spanish slugs (Arion lusitanicus) are one of the most common slug species in Central Europe. The animals sometimes nicknamed "killer slugs" are known to do their fair share of damage in fields and gardens. The slug was thought to have originated in Southern Europe. However researchers of the German Biodiversity and Climate Centre and the Goethe University now found out, that the prime example of an invasive species is originally from Central Europe and thus no "immigrant" after all. Control measures, such as the EU regulation ...

Leesburg, VA, June 18, 2014—Researchers in Saudi Arabia have identified key defining characteristics of Middle East Respiratory Syndrome (MERS) in CT imaging of patients confirmed as having the disease. The study found that the most common CT finding in hospitalized patients with MERS infection is suggestive of an organizing pneumonia pattern. "A few studies have described variable degrees of lung opacities in patients with MERS, but did not clearly address their exact distribution," said Amr M. Ajlan, the corresponding author of the study. "Because we evaluated the ...

OTTAWA, June 18, 2014 – In a recent study published in Tobacco Control, researchers at the University of Ottawa Heart Institute have demonstrated the cost-effectiveness of the Ottawa Model for Smoking Cessation (OMSC), an intervention that includes in-hospital counseling, pharmacotherapy and post-hospital follow-up, compared to usual care among smokers hospitalized with acute myocardial infarction, unstable angina, heart failure, and chronic obstructive pulmonary disease. The study examined patients hospitalized in Ontario, a province with a population of approximately ...

The review's sole author, Dr. Patricia Lopes from the Institute of Evolutionary Biology and Environmental Studies at the University of Zurich, says that animals from a number of different species will eat and drink less, reduce their activity and sleep more when they are sick in order to conserve energy for their recovery. However, this can all change depending on the social situation. In a paper published this week in the journal Proceedings of the Royal Society B, Lopes reviewed a range of different social situations that affected the behavior of sick animals, including ...

An international study has analysed the association between childhood maltreatment and the volume of cerebral grey matter, responsible for processing information. The results revealed a significant deficit in various late developing regions of the brain after abuse. According to the World Health Organisation (WHO), child maltreatment is defined as all forms of physical and/or emotional ill-treatment, sexual abuse, neglect or negligent treatment or commercial or other exploitation, resulting in actual or potential harm to the child's health, survival, development or dignity ...

Trap-jaw ant species are active hunters with venomous stings and jaws powerful enough to fling themselves through the air. According to new research, they are also spreading into new territory in the southeastern United States. The research was done by scientists at North Carolina State University, the Mississippi Entomological Museum, the University of California, Davis and Archbold Biological Station. "The fact that some of these species are spreading is interesting, in part, because these giant ants have managed to expand their territory without anyone noticing," says ...

While more and more genomic information is becoming available at a drastically increasing pace, the knowledge we can gain about how microorganisms interact with their surrounding, infect hosts and alter their molecular programs in accordance to changing environmental conditions remains widely not deducible from genomic data alone, the researchers from University of Southern Denmark claim. This raises questions regarding the value of newly sequenced species. The researchers have analyzed the genomes that are available from the past 20 years of sequencing bacterial DNA. ...

Magnetic separators exploit the difference in magnetic properties between minerals, for example when separating magnetite from quartz. But this exercise becomes considerably more complex when the particles are not magnetic. In the wake of previous particle levitation experiments under high-power magnetic fields, a new study reveals that particles are deflected away from the magnet's round-shaped bore centre in a horizontal direction. Previous studies had observed the vertical levitation of the particles. These findings are presented by Shixiao Liu from the Faculty of Engineering, ...

Scientists have found that two-dimensional (2D) nanostructures with asymmetric design enable a new quantum mechanism, triggering the emission of tunable light at terahertz frequencies—with unprecedented efficiency. The researchers, from the University of Southampton and Imperial College London, found that quantum wells, 2D nanostructures formed of several layers of semi-conductor alloys placed on top of each other like a sandwich, can enhance light emission in a technological challenging spectral range. It is hoped that the findings will have an impact on photonic ...

This news release is available in Spanish. The report explains that Ph.D.s who work as researchers represent, on average in the OECD, 68.6% of those who are employed. By institutional sectors, the percentages of employees who work as researchers break down as follows: 45.4% in the private sector, 70.8% in public administration and 75.9% in higher education. In Spain, 86% of Ph.D.s employed in higher education are researchers, while for the private sector, this figure is only 26.5%. According to OECD figures, leading innovative countries like the United States, ...