ScienceDaily: Latest Science News

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• Large coronal hole near the sun's north pole
• Pediatric anesthetic risk: Ketamine may damage children's learning ability and memory
• A constitutional right to health care: Many countries have it, but not the U.S.
• Haste and waste on neuronal pathways
• Why does hot weather cause power outages?
• Evolutionary forensics used on hepatitis C virus outbreak
• Cheaper anti-cancer drug as effective as expensive drug in treating most common cause of blindness in older adults
• Alternative target for breast cancer drugs
• Heart failure: new treatment option makes heart 'softer'
• Eating eggs is not linked to high cholesterol in adolescents, study suggests
• Controlling friction by tuning van der Waals forces
• COPD increases risk of developing cerebral microbleeds
• Joint custody? Overnights away from home affect children's attachments
• Moving more may lower stroke risk
• Recommended calorie information on menus does not improve consumer choices

Large coronal hole near the sun's north pole Posted: 19 Jul 2013 05:42 PM PDT Astronomers captured an image of a gigantic coronal hole hovering over the sun's north pole on July 18, 2013, at 9:06 a.m. EDT. Coronal holes are dark, low density regions of the sun's outermost atmosphere, the corona. They contain little solar material, have lower temperatures, and therefore, appear much darker than their surroundings.

Pediatric anesthetic risk: Ketamine may damage children's learning ability and memory Posted: 19 Jul 2013 07:49 AM PDT Recent studies have found that anesthesia drugs have neurotoxicity on the developing neurons, causing learning and memory disorders and behavioral abnormalities. Ketamine is commonly used in pediatric anesthesia. A clinical retrospective study found that children under 3 years old who received a long-time surgery, or -- because of surgery -- require ketamine repeatedly, exhibited learning and memory disorders and behavioral abnormalities when they reached school-age.

A constitutional right to health care: Many countries have it, but not the U.S. Posted: 19 Jul 2013 07:49 AM PDT More than half of the world's countries have some degree of a guaranteed, specific right to public health and medical care for their citizens written into their national constitutions. The United States is one of 86 countries whose constitutions do not guarantee their citizens any kind of health protection. That's the finding of a new study that examines the level and scope of constitutional protection of specific rights to public health and medical care.

Haste and waste on neuronal pathways Posted: 19 Jul 2013 07:45 AM PDT Researchers were able to measure the speed of neuronal signal conduction along segments of single axons in neuronal cultures by using a high-resolution electrical method. The bioengineers are now searching for plausible explanations for the large conduction speed variations.

Why does hot weather cause power outages? Posted: 19 Jul 2013 07:31 AM PDT Why is the power grid so sensitive to high temperatures? It's quite simple really. First, we certainly love our air conditioners, and air conditioners demand a lot of power. Second, power is generated at only a few places in the country, and yet our air-conditioned homes and businesses and factories are everywhere.

Evolutionary forensics used on hepatitis C virus outbreak Posted: 19 Jul 2013 05:39 AM PDT The rapid molecular evolution of hepatitis C virus (HCV) has been used to help incriminate the source of an outbreak in two Spanish hospitals in the late nineties. The evolutionary techniques used also helped separate those who were infected by the person in question from those infected elsewhere during the same time period.

Cheaper anti-cancer drug as effective as expensive drug in treating most common cause of blindness in older adults Posted: 19 Jul 2013 05:39 AM PDT An anti-cancer drug has been proven to be equally as effective in treating the most common cause of blindness in older adults as a more expensive drug specifically formulated for this purpose.

Alternative target for breast cancer drugs Posted: 19 Jul 2013 05:39 AM PDT Scientists have identified higher levels of a receptor protein found on the surface of human breast tumor cells that may serve as a new drug target for the treatment of breast cancer. The results show that elevated levels of the protein Ret, which is short for "Rearranged during transfection", are associated with a lower likelihood of survival for breast cancer patients in the years following surgery to remove tumors and cancerous tissue.

Heart failure: new treatment option makes heart 'softer' Posted: 19 Jul 2013 05:39 AM PDT Heart failure with concomitant pulmonary hypertension is a growing health problem with a high mortality rate, above all in older people. Cardiologists have now demonstrated the effectiveness of a substance that sticks to the so-called nitric oxide pathway and makes the heart "softer". This demonstrably ensures a clearly improved quality of life. Heart failure is regarded as a "new" common disease; according to expert estimates, in Austria there are around 250,000 people suffering from this condition.

Eating eggs is not linked to high cholesterol in adolescents, study suggests Posted: 19 Jul 2013 05:39 AM PDT Although in the late 20th century it was maintained that eating more than two eggs a week could increase cholesterol, in recent years experts have begun to refute this myth. Now, a new study has found that eating more eggs is not associated with higher serum cholesterol in adolescents, regardless of how much physical activity they do.

Controlling friction by tuning van der Waals forces Posted: 19 Jul 2013 05:39 AM PDT For a car to accelerate there has to be friction between the tire and the surface of the road. The amount of friction generated depends on numerous factors, including the minute intermolecular forces acting between the two surfaces in contact – so-called van der Waals forces. The importance of these intermolecular interactions in generating friction has long been known, but has now been demonstrated experimentally for the first time.

COPD increases risk of developing cerebral microbleeds Posted: 19 Jul 2013 05:36 AM PDT Chronic obstructive pulmonary disease (COPD) is associated with an increased risk of developing cerebral microbleeds, according to a new study.

Joint custody? Overnights away from home affect children's attachments Posted: 19 Jul 2013 05:36 AM PDT In joint custody arrangements, infants who spent overnights away from their mothers had less attachment to their mothers, a new study shows.

Moving more may lower stroke risk Posted: 18 Jul 2013 01:15 PM PDT Here's yet another reason to get off the couch: new research findings suggest that regularly breaking a sweat may lower the risk of having a stroke.

Recommended calorie information on menus does not improve consumer choices Posted: 18 Jul 2013 01:15 PM PDT Researchers recently put menu labels to the test by investigating whether providing diners with recommended calorie intake information along with the menu items caloric content would improve their food choices. The study showed that recommended calorie intake information did not help consumers use menu labeling more effectively.

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