Latest Science News -- ScienceDaily
Home-based hypertension program produces 'striking' results
Fri, 18 Jan 2019 08:32:23 EST
Pilot study finds that an innovative care-delivery program helped 81 percent of participants achieve blood pressure control in seven weeks.
Unraveling of 58-year-old corn gene mystery may have plant-breeding implications
Fri, 18 Jan 2019 08:32:16 EST
In discovering a mutant gene that 'turns on' another gene responsible for the red pigments sometimes seen in corn, researchers solved an almost six-decades-old mystery with a finding that may have implications for plant breeding in the future.
Violence in PG-13 rated movies not linked to violence in US society
Fri, 18 Jan 2019 08:32:07 EST
New research suggests that policy makers should remain focused on issues that have been demonstrated to impact criminal behavior, such as family environment, mental health, poverty and education.
Gene therapy promotes nerve regeneration
Fri, 18 Jan 2019 08:31:57 EST
Researchers have shown that treatment using gene therapy leads to a faster recovery after nerve damage. By combining a surgical repair procedure with gene therapy, the survival of nerve cells and regeneration of nerve fibers over a long distance was stimulated. The discovery is an important step towards the development of a new treatment for people with nerve damage.
Why do Hydra end up with just a single head?
Fri, 18 Jan 2019 08:31:49 EST
Hydra is able to regenerate any part of its body to rebuild an entire individual. The head organizer performs two opposite activities, one activating, which causes the head to differentiate, and the other inhibiting, which prevents the formation of supernumerary heads. Researchers have discovered the identity of the inhibitor, called Sp5, and deciphered the dialogue between these two antagonistic activities, which helps maintain a single-headed adult body and organize an appropriate regenerative response.
Frailty could make people more susceptible to dementia
Thu, 17 Jan 2019 19:27:34 EST
New research suggests that frailty makes older adults more susceptible to Alzheimer's dementia, and moderates the effects of dementia-related brain changes on dementia symptoms. The findings suggest that frailty should be considered in clinical care and management of Alzheimer's dementia.
Scientists create a renewable source of cancer-fighting T cells
Thu, 17 Jan 2019 16:04:07 EST
A study by UCLA researchers is the first to demonstrate a technique for coaxing pluripotent stem cells -- which can give rise to every cell type in the body and which can be grown indefinitely in the lab -- into becoming mature T cells capable of killing tumor cells.
Orchards in natural habitats draw bee diversity, improve apple production
Thu, 17 Jan 2019 16:04:04 EST
Apple orchards surrounded by agricultural lands are visited by a less diverse collection of bee species than orchards surrounded by natural habitats.
Telling stories using rhythmic gesture helps children improve their oral skills
Thu, 17 Jan 2019 14:22:34 EST
For the first time it has been shown that a brief training session with rhythmic gestures has immediate benefits for narrative discourse in children of 5 and 6 years of age.
Psychological distress is a risk factor for dementia
Thu, 17 Jan 2019 14:22:30 EST
A new study suggests that vital exhaustion -- which can be perceived as an indicator of psychological distress -- is a risk factor for future risk of dementia.
Combination therapy treats leishmaniasis, HIV patients
Thu, 17 Jan 2019 14:22:16 EST
Coinfection with visceral leishmaniasis (VL) and human immunodeficiency virus (HIV) has been observed in at least 35 countries on four continents and requires special case management. Currently, the World Health Organization recommends AmBisome monotherapy for treatment. Now, researchers have showed that a combination therapy of AmBisome and miltefosine is more effective.
Saturn hasn't always had rings
Thu, 17 Jan 2019 14:21:59 EST
In its last days, the Cassini spacecraft looped between Saturn and its rings so that Earth-based radio telescopes could track the gravitational tug of each. Scientists have now used these measurements to determine the mass of the rings and estimate its age, which is young: 10-100 million years. This supports the hypothesis that the rings are rubble from a comet or Kuiper Belt object captured late in Saturn's history.
Artificially produced cells communicate with each other
Thu, 17 Jan 2019 14:21:56 EST
Researchers have for the first time created artificial cell assemblies that can communicate with each other. The cells, separated by fatty membranes, exchange small chemical signaling molecules to trigger more complex reactions, such as the production of RNA and other proteins.
New thermoelectric material delivers record performance
Thu, 17 Jan 2019 14:21:54 EST
Taking advantage of recent advances in using theoretical calculations to predict the properties of new materials, researchers have discovered a new class of half-Heusler thermoelectric compounds, including one with a record high figure of merit -- a metric used to determine how efficiently a thermoelectric material can convert heat to electricity.
New findings reveal surprising role of the cerebellum in reward and social behaviors
Thu, 17 Jan 2019 14:21:51 EST
A study in rodents found that the brain's cerebellum -- known to play a role in motor coordination -- also helps control the brain's reward circuitry. Researchers found a direct neural connection from the cerebellum to the ventral tegmental area (a brain area long known to be involved in reward processing and encoding). The findings shed light on the brain circuits critical to the affective and social dysfunction seen across multiple psychiatric disorders.
Gene therapy blocks peripheral nerve damage in mice
Thu, 17 Jan 2019 14:21:44 EST
Scientists have developed a gene therapy that blocks axonal degeneration, preventing axon destruction in mice and suggesting a therapeutic strategy that could help prevent the loss of peripheral nerves in multiple conditions.
Size matters: To livebearer fish, big fins are a big deal
Thu, 17 Jan 2019 14:21:35 EST
Biologists studied the evolution of 40 molly and Limia species, and concluded dorsal fin displays arose first for males to compete with other males, only later being used in courtship displays to females. These changes in fin function went hand in hand with enlargement of the male dorsal fin. The fins reached extreme sizes in a few species and appear to be associated with rapid evolution, especially in mollies.
Wired for obesity
Thu, 17 Jan 2019 14:21:32 EST
Researchers have discovered a set of genes that help to establish brain connections governing body weight.
Can a critic-turned-believer sway others? The case of genetically modified foods
Thu, 17 Jan 2019 14:21:30 EST
When an advocate for one side of an issue announces that he or she now believes the opposite, can that message affect others' views? Research shows that such a conversion message can influence public attitudes. Using video of environmentalist Mark Lynas speaking about his change from an opponent of genetically modified crops to an advocate, researchers found that message had a greater impact than his direct advocacy message.
Blocking hormone uptake burns more fat
Thu, 17 Jan 2019 14:21:27 EST
A newly discovered regulatory mechanism helps the body control the rate of fat metabolism, according to a new study. The finding may lead to new drugs to help burn stored fat and reduce weight.