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144,920 articles from ScienceDaily

Refugia Of The Brazilian Atlantic Rainforest Could Be The Basis For Its Regeneration

Changes that have occurred in Brazil tropical rainforest for more than 100,000 years were studied by a team of researchers. They combined data from botany, palynology and genetics. Results indicated that the expansion of tropical conifer populations never occurred during interglacial periods, in contrast to what usually happened in the temperate latitudes. Such a finding should be useful for...

Regulation Of Vital Tumor Suppressor Gene P53 Detailed

So vital is the p53 tumor suppressor gene in controlling cancer that its dysfunction is linked to more than half of human cancers. Now, a just-published study reveals new levels of subtlety in the body's management of this all-important tumor suppressor gene and the protein it produces. The findings also outline an important new cycle of gene-regulating modifications that may be widespread in the...

Rehab For Fried Food Loving Couch Dwellers

Northwestern University is using an economics theory to rehab people with lousy health habits. Researchers want participants to just change two unhealthy behaviors to see if the others will tag along. Sort of a buy two, get two free sale based on the Behavioral Economics Theory used by Nobel Prize winner Daniel Kahneman. Couch potatoes also get an arsenal of high-tech tools to help them make the...

Right Breakfast Bread Keeps Blood Sugar In Check All Day

If you eat the right grains for breakfast, such as whole-grain barley or rye, the regulation of your blood sugar is facilitated after breakfast, lunch, and dinner. It was previously not known that certain whole-grain products have this effect all day. This is due to a combination of low GI (glycemic index) and certain type of indigestible carbohydrates that occur in certain grain products.

Role Reversal: Humans Suck Life Out Of Leeches

Global warming may be to blame for the gradual extinction of cold-loving species, and the European land leech in particular, according to a new study. The findings show that human-induced temperature increases over a 40-year period in the Graz region of Austria may have led to the near extinction of a local land leech.

Small Clumps Of Prion Proteins May Be Primary Cause Of Neurodegenerative Diseases

Scientists have shown for the first time that small clumps of abnormal prion proteins called oligomers cause the widespread death of neurons. In contrast, much larger prion aggregates known as fibrils proved to be far less toxic. The findings suggest that small protein aggregates play a central role in prion diseases; similar mechanisms have been proposed for the so-called "amyloid"...

Specific Brain Protein Required For Nerve Cell Connections To Form And Function

Neurons, or nerve cells, communicate with each other through contact points called synapses. When these connections are damaged, communication breaks down, causing the messages that would normally help our feet push our bike pedals or our mind locate our car keys to fall short. Scientists have now shown that a protein called neurexin is required for nerve cell connections to form and function...

Specific Neurons Involved In Memory Formation Identified

Scientists have unlocked one of the secrets of how memory is formed. Working with a unique breed of transgenic mice, the new study has shown for the first time that the same neurons activated during fear conditioning are, in fact, reactivated during memory retrieval. The findings could potentially be used to uncover precisely how drugs such as antidepressants work in the brain, allowing clinicians...

Support And Counseling Helps Alzheimer's Caregivers Remain Healthy

Counseling and support for people caring for a spouse with Alzheimer's disease helps to preserve their health, according to a new study. Spouses of people with Alzheimer's disease usually are older adults. While people who take on the caregiving role tend to be healthier than those who do not, caring for someone with Alzheimer's disease is difficult in the best of circumstances, and can take a...

Tasmanian Tiger No Match For Dingo

The wily dingo out competed the much larger marsupial Tasmanian tiger (thylacine) by being better built anatomically to resist the "mechanical stresses" associated with killing large prey, say Australian scientists.

The Power Of Fruit Juice

In years past, family physician Pamela Rockwell told parents not to let their children drink too much fruit juice because of its link to obesity. These days, though, she has changed her advice. A study this year found no association between childhood obesity and 100 percent fruit juice with no sugar added.

Databases Must Balance Privacy With Utility, Says Professor

Agencies like the US Census Bureau produce a voluminous amount of data, much of which is of tremendous value to researchers. But the data also includes personal information that could be harmful were it to fall into the wrong hands. Thus, organizations that maintain such databases need to devise ways to protect individuals' privacy while preserving the value of the information to researchers,...

Eating Together As A Family Creates Better Eating Habits Later In Life

Eating together as a family during adolescence is associated with lasting positive effects on dietary quality in young adulthood, according to researchers. The researchers found eating family meals together during adolescence resulted in adults who ate more fruit, dark-green and orange vegetables and key nutrients, and drank less soft drinks. Frequency of family meals predicted females would eat...

How Drones Find Queens: Odorant Receptor For Queen Bee Pheromone Identified

The mating ritual of the honey bee is a mysterious affair, occurring at dizzying heights in zones identifiable only to a queen and the horde of drones that court her. Now a research team has identified an odorant receptor that allows male drones to find a queen in flight. The receptor, on the male antennae, can detect an available queen up to 60 meters away.

NASA Satellites Eye Coastal Water Quality

Researchers armed with data from two NASA satellites have invented a way to map the fleeting changes in coastal water quality from space. Sediments entering the water as a result of coastal development or pollution can cause changes in water turbidity – a measure of the amount of particles suspended in the water. Sediments suspended from the bottom by strong winds or tides may also cause...

Nicotine In Breast Milk Disrupts Infants' Sleep Patterns

Nicotine in the breast milk of lactating mothers who smoke cigarettes disrupts their infants' sleep patterns, according to a new study. The findings raise new questions regarding whether nicotine exposure through breast milk affects infant development. While many women quit or cut down on smoking while pregnant, they often relapse following the birth of the baby.

Treatment For COPD May Need To Start Before Birth

Poor airway function shortly after birth should be recognised as a risk factor for airflow obstruction in young adults, and prevention of chronic obstructive pulmonary disease (COPD) may need to start in fetal life. The authors conclude that individuals born with poorer lung function continue this trend up to 22 years of age, and that further research is needed into how the lungs develop in the...

Annual Flu Shot Cuts Need For Doctors' Visits, Hospitalization Among Children

Children under the age of 5 who receive an annual flu shot have a greatly reduced risk of needing to see their doctor or be admitted to the hospital because of flu-related illness. Vaccinating only half US children against influenza could eliminate as many as 650,000 doctor's office visits and 2,250 hospitalizations in a year, according to the study.

Gender And Handedness Influences On Monkeys' Brains Similar To Humans

Both sex and handedness influences on the relative size of the corpus callosum. Capuchin monkeys are playful, inquisitive primates known for their manual dexterity, complex social behavior, and cognitive abilities. New research now shows that just like humans, they display a fundamental sex difference in the organization of the brain, specifically in the corpus callosum, the region that connects...

Prostate Cancer Survivors Who Suffer From Urinary Incontinence Benefit from New Sling Procedure

A routine check-up for a businessman three years ago revealed prostate cancer. The cancer was caught in time, but a side effect of his successful surgery was "driving him nuts." Losing urine control because of coughing, laughing, sneezing, or lifting is both frustrating and debilitating for the more than 2 million men worldwide afflicted with the condition. Many of these men are prostate-cancer...


Brewing A Blast-less Fertilizer

Down in the green, rolling hills and farmlands of Kentucky, Darrell Taulbee can often be found mixing up a batch of his homegrown fertilizer. But Taulbee isn't looking to grow a better Big Boy or distill a smoother bourbon, he tells us. He sets his sights on something far more sinister. Darrell Taulbee putters with this stuff to make sure another Oklahoma bombing never happens again.