Monday, November 02, 2009

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News


Next-generation Microcapsules Deliver 'Chemicals On Demand'

Posted: 02 Nov 2009 08:00 AM PST

Scientists are reporting development of a new generation of the microcapsules used in carbon-free copy paper, in which capsules burst and release ink with pressure from a pen. The new microcapsules burst when exposed to light, releasing their contents in ways that could have wide-ranging commercial uses from home and personal care to medicine.

Diets High In Sodium And Artificially Sweetened Soda Linked To Kidney Function Decline

Posted: 02 Nov 2009 08:00 AM PST

Individuals who consume a diet high in sodium or artificially sweetened drinks are more likely to experience a decline in kidney function, according to two new articles.

Snail Fossils Suggest Semiarid Eastern Canary Islands Were Wetter 50,000 Years Ago

Posted: 02 Nov 2009 08:00 AM PST

Isotopic measurements performed on fossil land snail shells found in ancient soils on the subtropical eastern Canary Islands resulted in oxygen isotope ratios that suggest the Spanish archipelago off the northwest coast of Africa has become progressively drier over the past 50,000 years, according to new research.

Dysfunctional Protein Dynamics Behind Neurological Disease?

Posted: 02 Nov 2009 08:00 AM PST

Researchers have taken a snapshot of proteins changing shape, sticking together and creating structures that are believed to trigger deadly processes in the nervous system. The discovery opens the possibility of designing drugs for a devastating neurological disease, amyotrophic lateral sclerosis (ALS).

First Synthetic Cellulosome In Yeast Created

Posted: 02 Nov 2009 08:00 AM PST

Scientist have constructed for the first time a synthetic cellulosome in yeast, which could make the production of bioethanol from biomass more efficient and economical.

Security Measures Lead To False Sense Of Security: Scientists Dispute Use Of National Security Tools

Posted: 02 Nov 2009 08:00 AM PST

Many of the security tools used by national governments lack scientific underpinning, according to an expert.

Venomous Shrew And Lizard: Harmless Digestive Enzyme Evolved Twice Into Dangerous Toxin In Two Unrelated Species

Posted: 02 Nov 2009 05:00 AM PST

Biologists have shown that independent but similar molecular changes turned a harmless digestive enzyme into a toxin in two unrelated species -- a shrew and a lizard -- giving each a venomous bite.

Pregnant Women At 'Serious Risk' from Flu

Posted: 02 Nov 2009 05:00 AM PST

Pregnant women who catch the flu are at serious risk for flu-related complications, including death, and that risk far outweighs the risk of possible side effects from injectable vaccines containing killed virus, according to an extensive review.

Discovery May Lead To Precision Engineering Of Superconducting Thin Films For Electronic Devices

Posted: 02 Nov 2009 05:00 AM PST

Using precision techniques for making superconducting thin films layer-by-layer, physicists have identified a single layer responsible for one such material's ability to become superconducting, i.e., carry electrical current with no energy loss. The technique could be used to engineer ultrathin films with "tunable" superconductivity for higher-efficiency electronic devices.

New Model May Help Scientists Better Predict And Prevent Influenza Outbreaks

Posted: 02 Nov 2009 05:00 AM PST

Each year, the influenza virus evolves. And each year, public health officials try to predict what the new strain will be and how it will affect the population in order to best combat it. A new study may make their task a little easier. The study breaks ground by working across scales and linking sub-molecular changes in the influenza virus to the likelihood of influenza outbreaks.

Blue Energy Seems Feasible And Offers Considerable Benefits

Posted: 02 Nov 2009 05:00 AM PST

Generating energy on a large scale by mixing salt and fresh water is both technically possible and practical. The worldwide potential for this clean form of energy – 'blue energy' – is enormous. However, several essential technological developments are needed and investments in large-scale trials, a Dutch researcher says.

Sleep Deprivation Can Negatively Affect Information Processing

Posted: 02 Nov 2009 05:00 AM PST

A new study shows that sleep deprivation causes some people to shift from a more automatic, implicit process of information categorization (information-integration) to a more controlled, explicit process (rule-based). This use of rule-based strategies in a task in which information-integration strategies are optimal can lead to potentially devastating errors when quick and accurate categorization is fundamental to survival.

Gene Therapy Repairs Injured Human Donor Lungs For The First Time

Posted: 02 Nov 2009 02:00 AM PST

For the first time, scientists have successfully used gene therapy to repair injured human donor lungs, making them potentially suitable for transplantation into patients. This technique could significantly expand the number of donor lungs by using organs that are currently discarded, and improve outcomes after transplantation. It is estimated that the number of donor organs available for lung transplants could easily be doubled with this technique.

Renal Cancer: Protein Triggers A Snowball Effect

Posted: 02 Nov 2009 02:00 AM PST

If a certain protein is missing in kidney cells, fatal cell division errors arise, which can finally lead to genetically unstable cells and to renal cancer. Researchers have tracked down the phenomenon.

Genetic Variation Of Enzyme Linked With Outcomes For Women Receiving Tamoxifen

Posted: 02 Nov 2009 02:00 AM PST

Among women with early stage breast cancer, genetic variation of a certain enzyme appears to be associated with clinical outcomes for women treated with tamoxifen, according to a new study.

Transforming Nanowires Into Nano-tools Using Cation Exchange Reactions

Posted: 02 Nov 2009 02:00 AM PST

A team of engineers has transformed simple nanowires into reconfigurable materials and circuits, demonstrating a novel, self-assembling method for chemically creating nanoscale structures that are not possible to grow or obtain otherwise.

Sleep Disturbances Improve After Retirement

Posted: 02 Nov 2009 02:00 AM PST

A new study shows that retirement is followed by a sharp decrease in the prevalence of sleep disturbances. Findings suggest that this general improvement in sleep is likely to result from the removal of work-related demands and stress rather than from actual health benefits of retirement.

Angry Faces: Facial Structure Linked To Aggressive Tendencies, Study Suggests

Posted: 01 Nov 2009 11:00 PM PST

Angry words and gestures are not the only way to get a sense of how temperamental a person is. According to new findings, a quick glance at someone's facial structure may be enough for us to predict their tendency towards aggression.

Pain Thresholds Linked To Inflammation And Sleep Problems In Arthritis Patients

Posted: 01 Nov 2009 11:00 PM PST

Despite recent advances in anti-inflammatory therapy, many rheumatoid arthritis patients continue to suffer from pain. Researchers have found that inflammation is associated with heightened pain sensitivity at joint sites, whereas increased sleep problems are associated with heightened pain sensitivity at both joint and non-joint sites.

Pharmaceutical Manufacture: Biochemical 'On-switch' Could Solve Protein Purification Challenge

Posted: 01 Nov 2009 11:00 PM PST

Drugs based on engineered proteins represent a new frontier for pharmaceutical makers. However, even after finding a protein that could become the next wonder drug, the problem of how to produce large quantities in a highly pure state must be confronted. Now, scientists may have a new solution in an enzymatic "food processor" that can be activated at will.

How MicroRNAs Suppress Tumor Metastasis

Posted: 01 Nov 2009 11:00 PM PST

Metastases are responsible for over 90 percent of cancer deaths. In a new study, researchers lend molecular insight into how microRNAs suppress tumor metastasis.

Are US And European Plovers Really Birds Of A Feather?

Posted: 01 Nov 2009 11:00 PM PST

The Kentish-Snowy Plover, a small shorebird found in the US and Europe, is 'suffering' from an identity crisis after scientists found genetic evidence that the populations are, in fact, separate species.

'Dutch' Batavians More Roman Than Thought

Posted: 01 Nov 2009 11:00 PM PST

The Batavians, who lived in the Netherlands at the start of the Christian era were far more Roman than was previously thought. After just a few decades of Roman occupation, the Batavians had become so integrated that they cooked, built and bathed in a Roman manner. A Dutch researcher discovered this during recent archaeological research.

Smart Drug Delivery System; Gold Nanocage Covered With Polymer That Responds To Light

Posted: 31 Oct 2009 09:00 PM PDT

A tiny cage of gold covered with a smart polymer responds to light, opening to empty its contents and resealing when the light is turned off. The smart nanocages could be used to deliver drugs directly to target sites, thus avoiding systemic side effects.

Nano-scale Drug Delivery Developed For Chemotherapy

Posted: 31 Oct 2009 09:00 PM PDT

Bioengineers have developed a simple and inexpensive method for loading cancer drug payloads into nano-scale delivery vehicles and demonstrated in animal models that this new nanoformulation can eliminate tumors after a single treatment.

Simple Questionaire Can Identify Patients At High Risk For Lung Cancer, Study Suggests

Posted: 31 Oct 2009 09:00 PM PDT

A new study confirms the success of a simple questionnaire designed to identify patients at high risk of lung cancer. Initiated in 2001, the current study confirmed 18 cases of cancer of the original 430 patients who qualified as high risk after completing a five-minute questionnaire.

Intervals Between Lung Cancer Diagnosis And Treatment Displays A Health Care Disparity

Posted: 31 Oct 2009 09:00 PM PDT

The intervals between lung cancer suspicion, diagnosis and treatment may be attributed to health care system discrepancies, according to new research.

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