Low-energy sweetners do help reduce calorie intake
November 10, 2015 08:25 AM - University of Bristol
Use of low energy sweeteners (LES) in place of sugar, in children and adults, leads to reduced calorie intake and body weight – and possibly also when comparing LES beverages to water – according to a review led by researchers at the University of Bristol published in the International Journal of Obesity today.
For the first time, all available science was integrated into a single review to evaluate the real impact of LES, such as saccharin, aspartame, sucralose and stevia, on energy intake (EI) and body weight (BW) over the short- and long-term. A considerable weight of evidence confirmed that consuming LES instead of sugar helps reduce relative energy intake and body weight.
What lies beneath Mount St. Helens?
November 10, 2015 07:17 AM - Eric Hand, Science/AAAS
Geoscientists have for the first time revealed the magma plumbing beneath Mount St. Helens, the most active volcano in the Pacific Northwest. The emerging picture includes a giant magma chamber, between 5 and 12 kilometers below the surface, and a second, even larger one, between 12 and 40 kilometers below the surface. The two chambers appear to be connected in a way that could help explain the sequence of events in the 1980 eruption that blew the lid off Mount St. Helens.
Vitamin C and the war on cancer
November 9, 2015 07:28 AM - Jocelyn Kaiser, Science
Maybe Linus Pauling was on to something after all. Decades ago the Nobel Prize–winning chemist was relegated to the fringes of medicine after championing the idea that vitamin C could combat a host of illnesses, including cancer. Now, a study published online today in Science reports that vitamin C can kill tumor cells that carry a common cancer-causing mutation and—in mice—can curb the growth of tumors with the mutation.
If the findings hold up in people, researchers may have found a way to treat a large swath of tumors that has lacked effective drugs. "This [could] be one answer to the question everybody's striving for," says molecular biologist Channing Der of the University of North Carolina, Chapel Hill, one of many researchers trying to target cancers with the mutation. The study is also gratifying for the handful of researchers pursuing vitamin C, or ascorbic acid, as a cancer drug. "I'm encouraged. Maybe people will finally pay attention," says vitamin C researcher Mark Levine of the National Institute of Diabetes and Digestive and Kidney Diseases.
Obama Rejects Keystone XL Pipeline
November 9, 2015 06:41 AM - Center for Biological Diversity
In a crucial victory for the climate, wildlife and the millions who spoke against it, President Obama rejected the Keystone XL project today, saying that building the tar sands oil pipeline is not in the national interest.
Over the past four years, scientists, environmentalists, tribes, farmers, celebrities and business people joined forces to fight the pipeline, with more than 2 million comments submitted to the U.S. State Department, tens of thousands participating in rallies against Keystone in all 50 states, and thousands of citizens arrested in peaceful civil disobedience.
“This is a historic moment, not just for what it means about avoiding the impacts of this disastrous pipeline but for all of those who spoke out for a healthy, livable climate and energy policies that put people and wildlife ahead of pollution and profits,” said Valerie Love with the Center for Biological Diversity. “President Obama did the right thing, but he didn’t do it alone: Millions of Americans made their voices heard on this issue, and will continue pressing Obama and other political leaders to do what’s necessary to avoid climate catastrophe.”
Invasive marine species benefit from rising CO2 levels
November 9, 2015 06:24 AM - Plymouth University
Ocean acidification may well be helping invasive species of algae, jellyfish, crabs and shellfish to move to new areas of the planet with damaging consequences, according to the findings of a new report. Slimy, jelly-like creatures are far more tolerant of rising carbon dioxide levels than those with hard parts like corals, since exposed shells and skeletons simply dissolve away as CO2 levels rise. The study, conducted by marine scientists at Plymouth University, has found that a number of notorious ‘nuisance’ species – such as Japanese kelp (Undaria pinnatifida) and stinging jellyfish (Pelagia noctiluca) are resilient to rising CO2 levels.
Acid rain's effects on forest soils found to be reversing
November 8, 2015 08:47 AM - USGS Newsroom
Soil acidification from acid rain that is harmful to plant and aquatic life has now begun to reverse in forests of the northeastern United States and eastern Canada, according to an American-Canadian collaboration of five institutions led by the U.S. Geological Survey.
The new research shows that these changes are strongly linked to acid rain decreases, although some results differ from expected responses.
"Reduced acid rain levels resulting from American and Canadian air-pollution control measures have begun to reverse soil acidification across this broad region," said Gregory Lawrence, a USGS soil and water chemist and lead author. "Prior to this study, published research on soils indicated that soil acidification was worsening in most areas despite several decades of declining acid rain. However, those studies relied on data that only extended up to 2004, whereas the data in this study extended up to 2014. "
The massive Indonesian fires
November 7, 2015 07:25 AM - lisa palmer, Yale Environment360
The fires that blazed in Indonesia’s rainforests in 1982 and 1983 came as a shock. The logging industry had embarked on a decades-long pillaging of the country’s woodlands, opening up the canopy and drying out the carbon-rich peat soils. Preceded by an unusually long El Niño-related dry season, the forest fires lasted for months, sending vast clouds of smoke across Southeast Asia.
Fifteen years later, in 1997 and 1998, a record El Niño year coincided with continued massive land-use changes in Indonesia, including the wholesale draining of peatlands to plant oil palm and wood pulp plantations. Large areas of Borneo and Sumatra burned, and again Southeast Asians choked on Indonesian smoke.
Turns out, licking a wound DOES make it heal faster!
November 6, 2015 03:31 PM - LUND UNIVERSITY via EurekAlert
By licking a wound it heals faster -- this is not simply popular belief, but scientifically proven. Our saliva consists of water and mucus, among other things, and the mucus plays an important role. It stimulates white blood cells to build a good defense against invaders, according to a group of researchers at Lund University in Sweden together with colleagues from Copenhagen and Odense in Denmark.
"White blood cells are among other places located in the oral mucosa, and they represent the body's first line of defence against infectious agents. The mucus in the mouth causes the white blood cells to throw out a 'net' that traps bacteria", explains Ole Sørensen from the Division of Infection Medicine.
The new imperative in buildings, cleaner air!
November 6, 2015 06:59 AM - Bill Roth, Triple Pundit
A study just published by the Harvard T.H. Chan School of Public Health has linked a building’s indoor air quality directly to its occupants’ cognitive function. Cognitive function is defined as the cerebral activities that lead to knowledge including acquiring information, reasoning, attention, memory and language.
The revolutionary finding of this study is that lowering indoor air levels of carbon dioxide and volatile organic compounds (VOCs) improves human cognitive function. In other words: Cleaner air makes us smarter!
Rat poisons endanger California wildlife
November 5, 2015 08:13 AM - Center for Biological Diversity
Researchers at the University of California released a study today indicating that rat poisons increasingly pose a significant risk for California’s imperiled Pacific fishers, small, forest-dwelling mammals that are protected under the California Endangered Species Act. The study shows that increasing numbers of fishers are being exposed to, and dying from, greater varieties of rat poisons, or rodenticides, found at illegal marijuana farms. It also affirms reports and data from across the state that rodenticides continue to poison and kill numerous California wildlife species.
“These poisons are silently killing our country’s most majestic wildlife by indiscriminately causing animals to literally bleed to death from the inside out,” said Jonathan Evans, environmental health legal director at the Center for Biological Diversity. “It’s time to ban these poisons from the market to protect fishers, bald eagles, great horned owls and kit foxes from a painful, gruesome fate.”