الأحد، 12 فبراير 2012

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News


Complex wiring of the nervous system may rely on a just a handful of genes and proteins

Posted: 11 Feb 2012 06:53 AM PST

Researchers have discovered a startling feature of early brain development that helps to explain how complex neuron wiring patterns are programmed using just a handful of critical genes. The findings may help scientists develop new therapies for neurological disorders, such as amyotrophic lateral sclerosis, and provide insight into certain cancers.

Human cognitive performance suffers following natural disasters

Posted: 11 Feb 2012 06:53 AM PST

Not surprisingly, victims of a natural disaster can experience stress and anxiety, but a new study indicates that it might also cause them to make more errors - some serious - in their daily lives. Researchers have explored how cognitive performance can decline after earthquakes and other natural disasters.

Putting the squeeze on planets outside our solar system

Posted: 11 Feb 2012 06:53 AM PST

Using high-powered lasers, scientists have discovered that molten magnesium silicate undergoes a phase change in the liquid state, abruptly transforming to a more dense liquid with increasing pressure. The research provides insight into planet formation.

Pitchers: Elbow position not a predictor of injury

Posted: 11 Feb 2012 06:52 AM PST

Elbow position alone appeared to not affect injury rates and performance in college-level, male pitchers say researchers.

Finding love has no expiration date: People over 60 are fastest growing demographic in online dating

Posted: 11 Feb 2012 06:50 AM PST

People may think that online dating is only for the young, but individuals over the age of 60 are the fastest growing demographic in online dating. However, they may be looking for different qualities in their relationships than their younger counterparts.

Environment's effects on evolution of survival traits

Posted: 11 Feb 2012 06:50 AM PST

Advances in studying genes mean that scientists in evolutionary developmental biology or "evo-devo" can now explain more clearly than ever before how bats got wings, the turtle got its shell and blind cave fish lost their eyes, says an evolutionary biologist.

Dramatic improvements and persistent challenges for women in science

Posted: 11 Feb 2012 06:50 AM PST

The underrepresentation of women in science has received significant attention. However, there have been few studies in which longitudinal data were used to assess changes over time. Now researchers find that women in the field of ecological studies have experienced dramatic improvements, but persistent challenges remain.

C-sections linked to breathing problems in preterm infants, study suggests

Posted: 10 Feb 2012 10:34 AM PST

A cesarean delivery, which was thought to be harmless, is associated with breathing problems in preterm babies who are small for gestational age, a new study suggests.

Drug halts organ damage in inflammatory genetic disorder, study suggests

Posted: 10 Feb 2012 10:34 AM PST

A new study shows that Kineret (anakinra), a medication approved for the treatment of rheumatoid arthritis, is effective in stopping the progression of organ damage in people with neonatal-onset multisystem inflammatory disease. This rare and debilitating genetic disorder causes persistent inflammation and ongoing tissue damage.

EEG pattern reflects brain's shift into low-energy, protective mode

Posted: 10 Feb 2012 10:34 AM PST

A distinctive pattern of brain activity associated with conditions including deep anesthesia, coma and congenital brain disorders appears to represent the brain's shift into a protective, low-activity state in response to reduced metabolic energy.

New method for creating tissue engineering scaffolds

Posted: 10 Feb 2012 10:33 AM PST

Researchers have developed a new method for creating scaffolds for tissue engineering applications, providing an alternative that is more flexible and less time-intensive than current technology.

Grass to gas: Genome map speeds biofuel development

Posted: 10 Feb 2012 10:33 AM PST

Researchers have taken a major step in the ongoing effort to find sources of cleaner, renewable energy by mapping the genomes of two originator cells of Miscanthus x giganteus, a large perennial grass with promise as a source of ethanol and bioenergy.

Over-expression of a protein responsible for neuronal damage in Down's syndrome sufferers

Posted: 10 Feb 2012 10:32 AM PST

A new study reproduced the same morphological and functional patterns of neuronal connections in a transgenic mouse as seen in people with Down's syndrome. Regulating the activity of this protein produced very similar neuronal growth to that in a healthy mouse.

Hovering not hard if you're top-heavy

Posted: 10 Feb 2012 10:32 AM PST

Top-heavy structures are more likely to maintain their balance while hovering in the air than are those that bear a lower center of gravity, researchers have found. Their findings are counter to common perceptions that flight stability can be achieved only through a relatively even distribution of weight—and may offer new design principles for hovering aircraft.

Seven sweet facts about how chocolate is made

Posted: 10 Feb 2012 10:32 AM PST

Most people are unaware of how chocolate gets from trees to your table find out with these seven fun facts.

Fighting crimes against biodiversity: How to catch a killer weed

Posted: 10 Feb 2012 08:12 AM PST

Invasive species which have the potential to destroy biodiversity and influence global change could be tracked and controlled in the same way as wanted criminals, according to new research.

Cannabis use doubles chances of vehicle crash

Posted: 10 Feb 2012 08:12 AM PST

Drivers who consume cannabis within three hours of driving are nearly twice as likely to cause a vehicle collision as those who are not under the influence of drugs or alcohol claims a paper published today on bmj.com.

Metastatic breast cancer hitches a free ride from the immune system

Posted: 10 Feb 2012 08:12 AM PST

Inflammatory breast cancer (IBC) is the most lethal form of breast cancer . It spreads easily through the lymphatic and blood vessels, forming metastasis which can lead to multi-organ failure. New research demonstrates how IBC cells use IL-8, secreted as part of the anti-inflammatory response by a specific set of white blood cells (monocytes), to increase fibronectin expression.

A novel method for simultaneously measuring blood pressure and arterial stiffness

Posted: 10 Feb 2012 08:12 AM PST

Arterial stiffness due to is a major contributor to cardiovascular disease but is very difficult to measure. A new method for measuring arterial stiffness has been developed. This simple, non-invasive, calculation is able to interpret standard oscillometric measurements to quantify both arterial stiffness and blood pressure simultaneously.

Arthritic knees, but not hips, have robust repair response

Posted: 10 Feb 2012 08:05 AM PST

Researchers used new tools they developed to analyze knees and hips and discovered that osteoarthritic knee joints are in a constant state of repair, while hip joints are not.

Risks and benefits of birthing facilities

Posted: 10 Feb 2012 08:02 AM PST

Researchers have found that the risk of obstetric intervention is lower for women who deliver or intend to deliver outside of hospitals, but there are some higher risks for newborns intended for home births compared to hospital births.

Neurologic improvement detected in rats receiving stem cell transplant

Posted: 10 Feb 2012 08:02 AM PST

Researchers report that early transplantation of human placenta-derived mesenchymal stem cells into the lateral ventricles of neonatal rats with birth-related brain damage is possible, and that the donor cells can survive and migrate in the recipient's brain. The study was designed to have the rat's brain damage mimic brain injury in infants with very low birth weight.

For women with prior cesarean, optimal gestational age for elective delivery is week 39

Posted: 10 Feb 2012 08:02 AM PST

For women with prior delivery via cesarean section the optimal timing of elective delivery for mother and baby is 39 weeks even after consideration of the risk with continuing pregnancy.

Domestic consumption main contributor to Africa's growing E-waste problem

Posted: 10 Feb 2012 08:00 AM PST

new report sheds light on current recycling practices and on socio-economic characteristics of the E-waste sector in West Africa. In the five countries studied, between 650,000 and 1,000,000 tons of domestic E-waste are generated each year, which need to be managed to protect human health and the environment in the region.

Phosphate additives pose a risk to health, study suggests

Posted: 10 Feb 2012 08:00 AM PST

Excessive consumption of phosphate is damaging to health. Therefore, food that contains phosphate additives should be labeled, researchers recommend.

Four natural extracts with anti-obesity effects tested on rats

Posted: 10 Feb 2012 08:00 AM PST

Researchers have identified four plant extracts that might help in preventing and fighting obesity. The researchers identified the most effective plant extracts through in vitro assays; subsequently, extracts were tested on rats. While the results obtained are promising, further studies on animals are required to evaluate and confirm the anti-obesity effects of these extracts. Once their anti-obesity effects are confirmed on animals, the extracts will be tested on humans.

Sleep breathing machine shows clear benefits in children with sleep apnea, study suggests

Posted: 10 Feb 2012 07:59 AM PST

Children and adolescents with obstructive sleep apnea had substantial improvements in attention, anxiety and quality of life after treatment with positive airway pressure (PAP) —- a nighttime therapy in which a machine delivers a stream of air through a mask into the nose.

Curry spice component may help slow prostate tumor growth

Posted: 10 Feb 2012 07:58 AM PST

Curcumin, an active component of the Indian curry spice turmeric, may help slow down tumor growth in castration-resistant prostate cancer patients on androgen deprivation therapy, a new study suggests.

Better tooth fillings? Materials that shrink when heated

Posted: 10 Feb 2012 07:47 AM PST

New research holds promise for applications ranging from high-precision optical components to tooth fillings.

New method makes culture of complex tissue possible in any lab

Posted: 09 Feb 2012 02:29 PM PST

Scientists have developed a new method for making scaffolds for culturing tissue in three-dimensional arrangements that mimic those in the body. This advance allows the production of tissue culture scaffolds containing multiple structurally and chemically distinct layers using common laboratory reagents and materials.

New integrated building model may improve fish farming operations

Posted: 09 Feb 2012 02:29 PM PST

Those who have ventured to turn a vacant barn or garage into an aquaculture business have too often been defeated by high energy and feed costs, building-related woes and serious environmental problems. Now researchers are melding building design, fish ecology and aquaculture engineering techniques into a first-of-its-kind "building-integrated aquaculture" (BIAq) model to offer an affordable, more holistic and sustainable approach to indoor fish production located close to markets and able to succeed even in cold climates.

An economic analysis of emerald ash borer management options

Posted: 09 Feb 2012 02:29 PM PST

A new study examines several options for managing the emerald ash borer, an invasive insect that is destroying US ash trees.

Focus on self-improvement, rather than winning, benefits young athletes

Posted: 09 Feb 2012 02:29 PM PST

Underserved youth athletes report more life skill and character development when their coaches place greater emphasis on creating caring climates instead of focusing on competition, according to new research.

New avenue for treating colon cancer

Posted: 09 Feb 2012 02:29 PM PST

Cell biologists have uncovered a new insight into colon cancer, the third leading cause of cancer-related deaths in the United States. The team analyzed human colon cancer specimens and found that in nearly 80 percent of them the variants of a gene (HNF4A) are out of balance. This imbalance appears to be the result of a complex, multi-step process by an enzyme (Src kinase).

Decoding the molecular machine behind E. coli and cholera

Posted: 09 Feb 2012 02:28 PM PST

Scientists have discovered the workings behind some of the bacteria that kill hundreds of thousands every year, possibly paving the way for new antibiotics that could treat infections more effectively.

Why fishermen keep fishing despite dwindling catches

Posted: 09 Feb 2012 02:28 PM PST

Half of fishermen would not give up their livelihood in the face of drastically declining catches, according to new research. A new report challenges previously held notions about poverty and adaptation by investigating why fishermen in developing countries stick with their trade.

Ultrasound study provides first direct evidence of effect of malaria on fetal growth

Posted: 09 Feb 2012 02:28 PM PST

A study of almost 3,800 pregnancies has provided the most accurate and direct evidence to date that malaria infection reduces early fetal growth. Low birth weight is the most important risk factor for neonatal mortality in developing countries. The research, carried out on the border of Thailand and Myanmar, highlights the importance of preventing malaria in pregnancy.

A gentler way of doing brain surgery

Posted: 09 Feb 2012 02:26 PM PST

Brain surgery is getting much easier for many patients. Neurosurgeons are using catheters rather than open surgery to repair aneurysms and other defects. Patients recover in a few days, with less chance of cognitive deficits.

When children don't get a Valentine's Day card

Posted: 09 Feb 2012 02:26 PM PST

Valentine's Day can be pretty painful for kids who don't get their share of heart-shaped cards. An expert offers tips for parents when their kids come home empty-handed.

Creativity: Anyone can learn to be more inventive, expert says

Posted: 09 Feb 2012 02:26 PM PST

There will always be a wild, unpredictable quality to creativity and invention, says a cognitive psychology, because reaching an "Aha moment" means leaping tall mental obstacles. But he has developed a tookit for overcoming common roadblocks and improving problem-solving.

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