ScienceDaily: Top News

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• To grow or to defend: How plants decide
• Climatological software developed for massive use
• What patients need to know about revision surgery after hip or knee replacement
• Sleep to protect your brain
• Study finds medical students concerned about becoming desensitized to dying patients
• New species of marine algae identified
• High good, low bad cholesterol levels are healthy for brain, too
• With few hard frosts, tropical mangroves push north
• Molecular evolution of genetic sex-determination switch in honeybees
• Fetal alcohol syndrome heart defects may be caused by altered function, not structure
• Nicotine exploits COPI to foster addiction
• Alcohol leaves its mark on youngsters' DNA
• Infection with common cold virus: scientists reveal new insights
• Concussion history associated with risk of alzheimer's disease
• Gene therapy for human skin disease produces long-term benefits
• Adding cognitive behavioral therapy to treatment of pediatric migraine helps relieve symptoms
• Multi-component therapy shown beneficial in treating PTSD in adolescent girls
• Variation in land-use intensity leads to higher biodiversity
• In men, high testosterone can mean weakened immune response, study finds
• Medical review throws doubt on wound care treatments
• Gene therapy method targets tumor blood vessels
• Hospital-diagnosed maternal infections linked to increased autism risk, study suggests

To grow or to defend: How plants decide Posted: 01 Jan 2014 10:07 AM PST Plant hormones called brassinosteroids help plants choose the best survival strategy depending on their stage of growth and environmental pressures.

Climatological software developed for massive use Posted: 01 Jan 2014 10:07 AM PST Understanding the weather behavior may not be as complicated as once thought, and would help to have more elements for decision making and prevention of natural disasters, as hurricanes or typhoons. Researchers make available this information available for anyone to know their community, state or country's weather activity for today and months ahead.

What patients need to know about revision surgery after hip or knee replacement Posted: 31 Dec 2013 10:27 AM PST Over the past two years, an expert in revision hip and knee replacement surgery has seen an increase in the number of people needing a second surgery. When a knee or hip implant wears out or another problem develops, people often need a second surgery in which the existing implant or components are taken out and replaced.

Sleep to protect your brain Posted: 31 Dec 2013 09:21 AM PST A new study shows that one night of sleep deprivation increases morning blood concentrations of NSE and S-100B in healthy young men. These molecules are typically found in the brain. Thus, their rise in blood after sleep loss may indicate that a lack of snoozing might be conducive to a loss of brain tissue.

Study finds medical students concerned about becoming desensitized to dying patients Posted: 31 Dec 2013 09:21 AM PST The imminent death of a patient is riddled with emotions for a patient and family as well as the medical team. A study based on the reflections of third-year medicine students is shedding light on the struggle physicians in training often face when trying to control their own emotions while not becoming desensitized to the needs of the dying patient and his or her family.

New species of marine algae identified Posted: 31 Dec 2013 06:43 AM PST The species that historically was quoted as the most abundant of coral algae that forms rodoliths at the Gulf of California in Mexico, is in reality a compound of five different species. This finding was made by a marine biologist, resulting in a change of paradigm in the study of the species known as Lithophyllum margaritae.

High good, low bad cholesterol levels are healthy for brain, too Posted: 30 Dec 2013 02:03 PM PST High levels of "good" cholesterol and low levels of "bad" cholesterol are correlated with lower levels of the amyloid plaque deposition in the brain that is a hallmark of Alzheimer's disease, in a pattern that mirrors the relationship between good and bad cholesterol in cardiovascular disease, researchers have found.

With few hard frosts, tropical mangroves push north Posted: 30 Dec 2013 02:03 PM PST Cold-sensitive mangrove forests doubled in area along N. Florida's Atlantic Coast as the frequency of killing frosts waned, according to a study based on 28 years of satellite data.

Molecular evolution of genetic sex-determination switch in honeybees Posted: 30 Dec 2013 02:01 PM PST It's taken nearly 200 years, but scientists in the United States and Europe have teased out how the molecular switch for sex gradually and adaptively evolved in the honeybee.

Fetal alcohol syndrome heart defects may be caused by altered function, not structure Posted: 30 Dec 2013 10:51 AM PST Recent data shows that more than 500,000 women in the US report drinking during pregnancy, with about 20 percent of this population admitting to binge drinking. Even one episode of heavy drinking can lead to the collection of birth defects known as fetal alcohol syndrome.

Nicotine exploits COPI to foster addiction Posted: 30 Dec 2013 10:49 AM PST Study helps explain how nicotine exploits the body's cellular machinery to promote addiction. The findings could lead to new therapies to help people quit smoking.

Alcohol leaves its mark on youngsters' DNA Posted: 30 Dec 2013 07:14 AM PST A preliminary study indicates that weekend alcohol consumption may affect DNA.

Infection with common cold virus: scientists reveal new insights Posted: 30 Dec 2013 07:14 AM PST On average, each of us catches a cold two to three times a year. However, how the common cold virus actually infects us is only partly understood. Researchers have now provided new insights into this process.

Concussion history associated with risk of alzheimer's disease Posted: 26 Dec 2013 03:16 PM PST A new study suggests that a history of concussion involving at least a momentary loss of consciousness may be related to the buildup of Alzheimer's-associated plaques in the brain.

Gene therapy for human skin disease produces long-term benefits Posted: 26 Dec 2013 11:31 AM PST Researchers evaluated a patient with a genetic skin disorder known as epidermolysis bullosa nearly seven years after he had undergone a gene therapy procedure as part of a clinical trial. The study revealed that a small number of skin stem cells transplanted into the patient's legs were sufficient to restore normal skin function, without causing any adverse side effects.

Adding cognitive behavioral therapy to treatment of pediatric migraine helps relieve symptoms Posted: 24 Dec 2013 03:36 PM PST Among children and adolescents with chronic migraine, the use of cognitive behavioral therapy resulted in greater reductions in headache frequency and migraine-related disability compared with headache education, according to a study.

Multi-component therapy shown beneficial in treating PTSD in adolescent girls Posted: 24 Dec 2013 03:36 PM PST Adolescents girls with sexual abuse-related post-traumatic stress disorder experienced greater benefit from prolonged exposure therapy (a type of therapy that has been shown effectiveness for adults) than from supportive counseling, according to a study.

Variation in land-use intensity leads to higher biodiversity Posted: 24 Dec 2013 03:35 PM PST If grassland is managed intensively, biodiversity typically declines. A new study led by Bernese plant ecologists shows that it is rare species that suffer the most. These negative effects could be reduced, if farmers varied the intensity of their land use between years.

In men, high testosterone can mean weakened immune response, study finds Posted: 23 Dec 2013 03:14 PM PST Scientists have linked high testosterone levels in men to a poor immune response to an influenza vaccine.

Medical review throws doubt on wound care treatments Posted: 23 Dec 2013 03:11 PM PST A systematic review of 66 research papers focused on the treatment of skin ulcers suggests that most are so technically flawed that their results are unreliable. And even of those that pass muster, there is only weak evidence that some treatments work better than standard compression therapy or special stockings.

Gene therapy method targets tumor blood vessels Posted: 23 Dec 2013 03:11 PM PST Working in mice, researchers report developing a gene delivery method long sought in the field of gene therapy: a deactivated virus carrying a gene of interest that can be injected into the bloodstream and make its way to the right cells. In this early proof-of-concept study, the scientists have shown that they can target tumor blood vessels in mice without affecting healthy tissues.

Hospital-diagnosed maternal infections linked to increased autism risk, study suggests Posted: 23 Dec 2013 10:11 AM PST Hospital-diagnosed maternal bacterial infections during pregnancy were associated with an increased risk of autism spectrum disorders in children, according to a study published.

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