Exposure to small amounts of lead may contribute to ADHD symptoms in children who have a particular gene mutation, according to new research published in Psychological Science, a journal of the Association for Psychological Science.
"This research is valuable to the scientific community as it bridges genetic and environmental factors and helps to illustrate one possible route to ADHD. Further, it demonstrates the potential to ultimately prevent conditions like ADHD by understanding how genes and environmental exposures combine," says lead researcher Joel Nigg, professor of psychiatry and behavioral neuroscience at the OHSU School of Medicine.
Fire use for brush control is nature's way of keeping the ecosystem thriving but as the 20th century progressed, natural methods gave way to environmental lobbying and legal bullying. California, which led the nation in environmental activism, has seen fire hazards run out of control.
This was no surprise to experts in land management. Dr. Bill Rogers, a Texas A&M AgriLife Research professor in the department of ecosystem science and management in College Station, notes that fire has historically played an important role in achieving land management objectives and further eliminating its use could have detrimental effects.
We age because the cells in our bodies begin to malfunction over the years. This is the general view that scientists hold of the ageing process. For example, in older people the cells' internal quality control breaks down. This control function usually eliminates proteins that have become unstable and lost their normal three-dimensional structure. These deformed proteins accumulate in the cells in a number of diseases, such as Parkinson's and Alzheimer's.
BETHESDA, Md., Jan. 8, 2016 -- Thyroid disease affects about 12 percent of the U.S. population. While many people with thyroid disease don't even know they have it, an overactive or underactive thyroid can cause a slew of problems, including weight gain or loss, mood changes and infertility. In children, an underactive thyroid can be fatal, which is why they are tested for a deficiency at birth.
Science is advancing rapidly. We are eradicating diseases, venturing further into space and discovering a growing zoo of subatomic particles. But cosmology – which is trying to understand the evolution of the entire universe using theories that work well to describe other systems – is struggling to answer many of its most fundamental questions.-->
There is no doubting that the FFZero1 concept car just unveiled at the Consumer Electronics Show in Las Vegas this week is eye-catching, but it’s one of a number of new and transformed car brands.-->
Extreme rain events fueled by the current strong El Nino have started to affect California. NASA estimated rainfall over a period of 7 days while NASA/NOAA's GOES Project created a satellite animation showing the storms affecting the region over the past three days.
An animation NOAA's GOES-West satellite imagery from Jan. 5 through Jan 7 shows the progression of storm systems in the Eastern Pacific Ocean that hit southern California and generated flooding and mudslides. The animation was created at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
There are certain universal patterns in nature that hold true, regardless of objects' size, species, or surroundings. Take, for instance, the branching fractals seen in both tree limbs and blood vessels, or the surprisingly similar spirals in mollusks and cabbage.
Now scientists at MIT and Cambridge University have identified an unexpected shared pattern in the collective movement of bacteria and electrons: As billions of bacteria stream through a microfluidic lattice, they synchronize and swim in patterns similar to those of electrons orbiting around atomic nuclei in a magnetic material.
While there is general consensus that the ability to imagine a never-before-seen object or concept is a unique and distinctive human trait, there is little that we know about the neurological mechanism behind it. Neuroscientist Dr. Andrey Vyshedskiy proposes a straightforward experiment that could test whether the ability to imagine a novel object involves the synchronization of groups of neurons, known as neuronal ensembles. Since the process involves mentally combining familiar images, scenes or concepts, Dr. Vyshedskiy proposes calling this process 'mental synthesis.' His research idea is published in the open-access Research Idea and Outcomes (RIO) Journal.
A new study reveals that drug shortages affecting emergency care have skyrocketed in the United States in recent years. While the prevalence of such shortages fell from 2002 to 2007; the number of shortages sharply increased by 373% (from 26 to 123) from 2008 to 2014.
These medications are approved, but for various reasons manufacturers cannot meet demands or have stopped making the drugs.
"Many of those medications are for life-threatening conditions, and for some drugs no substitute is available," said Dr. Jess Pines, senior author of the Academic Emergency Medicine study. "This means that in some cases, emergency department physicians may not have the medications they need to help people who are in serious need of them."
Injury and degeneration of fibro-cartilaginous tissues, such as the knee meniscus and the intervertebral disc, have significant socioeconomic and quality-of-life costs. But the development of effective treatment strategies to address pathologies in these load-bearing tissues has been hindered by a lack of understanding of the relationships between their structure and their function.
Now, a team of researchers from the University of Delaware and the University of Pennsylvania has shed new light on this issue, laying the foundation for better treatment of injuries such as meniscus tears as well as new therapies for osteoarthritis and age-related degeneration.
Oxygen is crucial for the existence of animals on Earth. But, an increase in oxygen did not apparently lead to the rise of the first animals. New research shows that 1.4 billion years ago there was enough oxygen for animals - and yet over 800 million years went by before the first animals appeared on Earth.
Animals evolved by about 600 million years ago, which was late in Earth's history. The late evolution of animals, and the fact that oxygen is central for animal respiration, has led to the widely promoted idea that animal evolution corresponded with a late a rise in atmospheric oxygen concentrations.
It may seem strange to have a segment of the population, once confined to wealthy elites on the coasts but now growing nationwide, which believe that a particular process for food is not only healthier, but materially, culturally and ethically important. Yet the ultra-conservatives who make up the organic food customers, corporations, trade groups and lobbyists are not a modern invention. The engine was going to ruin agriculture too, and resistance to modern science and technology goes back at least 7,000 years.
Then, as now, the difference was that staying in the past would be 'better' for health.
WASHINGTON --Although survival rates for people who suffer cardiac arrest outside a hospital are extremely low in most places, emergency physicians propose three interventions to improve survival rates and functional outcomes in any community and urge additional federal funding for cardiac resuscitation research in an editorial published online last Wednesday in Annals of Emergency Medicine ("IOM Says Times to Act to Improve Cardiac Arrest Survival ... Here's How").
A new study into magma ascent by geoscientists at the University of Liverpool has found that temperature may be more important than pressure in generating gas bubbles which trigger explosive volcanic eruptions.
In a paper published in Nature, researchers at the University's School of Environmental Sciences showed that as magma ascends in volcanic conduits, it heats up which can melt its crystal cargo and force the formation of bubbles. Importantly, they also showed that more bubbles are formed by heating than through decompression, which had been previously thought.
Biologists at the universities of York and Exeter have published new research which shows that an ancient symbiosis is founded entirely on exploitation, not mutual benefit.
The researchers concluded that a single-celled protozoa called Paramecium bursaria benefits from exploiting a green algae which lives inside it, providing its host with sugar and oxygen from photosynthesis.
Scientists have been debating for decades whether symbioses, like the Paramecium-Chlorella association, are based on mutual benefit or exploitation.
The common belief among academics was that both the protozoa and algae benefit.