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135,929 articles from ScienceDaily

Novel Insecticidal Toxins From Bacteria

A light-emitting strain of bacteria and a nematode worm, which work together to prey on soil-dwelling insects, use insecticidal toxins to kill their insect hosts. Scientists are now investigating the potential role of these toxins in bacteria pathogenic to humans.

Parasitic Battles Can Involve Gene Transfer That Aids Evolution

Scientists have recorded the entire genomic expression of a host bacterium and infecting virus over the eight-hour course of infection. Their study leads them to speculate that the meeting between a marine bacterial host and its virus may be not just a battle between individuals, but an evolutionarily significant exchange that helps both species become more fit for life in the harsh ocean...

Physicists Establish 'Spooky' Quantum Communication

Physicists have coaxed two separate atoms to communicate with a sort of quantum intuition that Albert Einstein called "spooky." In doing so, the researchers have made an advance toward super-fast quantum computing. The research could also be a building block for a quantum internet.

Pivotal Hearing Structure Revealed

Scientists have shed light on how our bodies convert vibrations entering the ear into electrical signals that can be interpreted by the brain. Exactly how the electrical signal is generated has been the subject of ongoing research interest.

Possible Hepatitis C Vaccine

The hepatitis C virus infects up to 500,000 people in the UK alone, many of the infections going undiagnosed. It is the single biggest cause of people requiring a liver transplant in Britain. Now scientists have found monoclonal antibodies which may be a significant step towards a vaccine.

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.