ScienceDaily: Top News


Astronomers map vast void in our cosmic neighborhood

Posted: 22 Jul 2019 03:21 PM PDT

A new study reveals more of the vast cosmic structure surrounding our Milky Way galaxy.

Tourist photographs are a cheap and effective way to survey wildlife

Posted: 22 Jul 2019 03:21 PM PDT

Tourists on safari can provide wildlife monitoring data comparable to traditional surveying methods, suggests new research. The researchers analyzed 25,000 photographs from 26 tour groups to survey the population densities of five top predators (lions, leopards, cheetahs, spotted hyenas, and wild dogs) in northern Botswana, making it one of the first studies to use tourist photographic data for this purpose.

Parasitic plants use stolen genes to make them better parasites

Posted: 22 Jul 2019 03:21 PM PDT

Some parasitic plants steal genetic material from their host plants and use the stolen genes to more effectively siphon off the host's nutrients. A new study reveals that the parasitic plant dodder has stolen a large amount of genetic material from its hosts, including over 100 functional genes, through a process called horizontal gene transfer.

Widespread aspirin use despite few benefits, high risks

Posted: 22 Jul 2019 03:21 PM PDT

Nearly 30 million Americans older than 40 take aspirin daily to prevent cardiovascular disease. More than 6 million Americans take aspirin daily without physician's recommendation. Nearly half of Americans more than 70 years of age without cardiovascular disease, an estimate of nearly 10 million people, take aspirin daily -- despite current guidelines against this practice.

Using antibiotics without a prescription is a prevalent public health problem

Posted: 22 Jul 2019 03:21 PM PDT

People using antibiotics without a prescription seems to be a prevalent public health problem. Antibiotics were obtained through various means, including saving leftover prescriptions for later use, getting them from friends and family, or obtaining them from local markets 'under the counter.'

How fat prawns can save lives

Posted: 22 Jul 2019 03:20 PM PDT

New research provides a roadmap for how entrepreneurs can harness freshwater prawns' voracious appetite for snails to reduce the transmission of schistosomiasis-causing parasites while still making a profit selling the tasty animals as food. The study shows how small-scale farming of freshwater prawns could be a win-win for communities in emerging and developing economies where schistosomiasis is common.

Scientists document late Pleistocene/early Holocene Mesoamerican stone tool tradition

Posted: 22 Jul 2019 12:52 PM PDT

Scientists have documented the very earliest indigenous stone tool tradition in southern Mesoamerica.

Maintaining shelf-stable drugs

Posted: 22 Jul 2019 12:52 PM PDT

A new mathematical model describes how highly concentrated antibody solutions separate into different phases, similar to an oil and water mixture, which can reduce the stability and shelf-life of some drugs.

Technologies for the directed evolution of cell therapies

Posted: 22 Jul 2019 12:45 PM PDT

New research highlights how the next generation of therapies are moving beyond the use of small molecules and proteins to using whole cells.

College spending habits may predict when 'adulting' starts

Posted: 22 Jul 2019 11:49 AM PDT

How well you manage your money in college may determine when you'll ultimately achieve 'adult identity,' according to a new study.

Cosmic pearls: Fossil clams in Florida contain evidence of ancient meteorite

Posted: 22 Jul 2019 10:25 AM PDT

Researchers picking through the contents of fossil clams from a Sarasota County quarry found dozens of tiny glass beads, likely the calling cards of an ancient meteorite.

A torque on conventional magnetic wisdom

Posted: 22 Jul 2019 10:25 AM PDT

Physicists have observed a magnetic phenomenon called the 'anomalous spin-orbit torque' (ASOT) for the first time. Scientists have made this observation, demonstrating that there exists competition between what is known as spin-orbit coupling and the alignment of an electron spin to the magnetization.

New study explains the molecular mechanism for the therapeutic effects of cilantro

Posted: 22 Jul 2019 10:25 AM PDT

Herbs, including cilantro, have a long history of use as folk medicine anticonvulsants. Until now, many of the underlying mechanisms of how the herbs worked remained unknown. In a new study, researchers uncovered the molecular action that enables cilantro to effectively delay certain seizures common in epilepsy and other diseases.

Vampire algae killer's genetic diversity poses threat to biofuels

Posted: 22 Jul 2019 10:25 AM PDT

New DNA analysis has revealed surprising genetic diversity in a bacterium that poses a persistent threat to the algae biofuels industry. With the evocative name Vampirovibrio chlorellavorus, the predatory pest sucks out the contents of the algae cells (thus the vampire reference) and reduces a productive, thriving, green algae pond to a vat of rotting sludge.

Search for new semiconductors heats up with gallium oxide

Posted: 22 Jul 2019 10:24 AM PDT

Electrical engineers have cleared another hurdle in high-power semiconductor fabrication by adding the field's hottest material -- beta-gallium oxide -- to their arsenal. Beta-gallium oxide is readily available and promises to convert power faster and more efficiently than today's leading semiconductor materials -- gallium nitride and silicon, the researchers said.

Social isolation stresses rodents

Posted: 22 Jul 2019 10:24 AM PDT

The traditional method of housing mice and rats alone increases stress and worsens epilepsy, according to a new study. The added stress could complicate results of pre-clinical drug trials.

Big data clarifies emotional circuit development

Posted: 22 Jul 2019 10:24 AM PDT

Several brain circuits that identify emotions are solidified early in development and include diverse regions beyond the amygdala, according to new research in children, adolescents, and young adults.

Exosomes may hold the answer to treating, diagnosing developmental brain disorders

Posted: 22 Jul 2019 10:24 AM PDT

Scientists shed new light on the role that exosomes play in brain development. They show that exosomes are not only integral to the development of neurons and neural circuits, but they can restore health to brain cells affected by developmental disease.

The early days of the Milky Way revealed

Posted: 22 Jul 2019 10:24 AM PDT

A study puts a sequence to the events which gave rise to our Galaxy.

Americans are drilling deeper than ever for fresh water

Posted: 22 Jul 2019 08:59 AM PDT

A new study shows Americans are drilling deeper than ever for fresh water.

Encephalitis identified as rare toxicity of immunotherapy treatment

Posted: 22 Jul 2019 08:59 AM PDT

Researchers chronicling rare but serious toxicities that may occur with immune checkpoint inhibitors, the most widely prescribed class of immunotherapies.

Despite progress, only 3 African nations expected to meet global breastfeeding goal

Posted: 22 Jul 2019 08:59 AM PDT

Only three African countries are expected to meet the global target for exclusive breastfeeding, 'an unparalleled source of nutrition for newborns and infants, no matter where they are born,' according to a global health expert.

School psychologists develop intervention to reduce hallway disruptions

Posted: 22 Jul 2019 08:59 AM PDT

A game-like intervention developed by school psychologists may help reduce hallway disruptions among elementary school children.

Texas' strategic goal for students' debt burden shows potential promise and pitfalls

Posted: 22 Jul 2019 08:59 AM PDT

College students in Texas who graduated from public universities with a bachelor's degree had, on average, student loan debts that equaled 74% of what they earned in their first-year wages, according to a new study. The study, which looked at students who started college between 2004 and 2008, also shows that black and Latinx students are predicted to borrow larger amounts of college debt than white students compared to what they'll make in their first job. 

Lots of lead in the water? Maybe manganese is to blame

Posted: 22 Jul 2019 08:59 AM PDT

In the right environment, a harmless mineral can do a lot to change the composition of the drinking water that flows through lead pipes. New research discovers how.

Airborne lidar system poised to improve accuracy of climate change models

Posted: 22 Jul 2019 08:59 AM PDT

Researchers have developed a laser-based system that can be used for airborne measurement of important atmospheric gases with unprecedented accuracy and resolution. The ability to collect this data will help scientists better understand how these atmospheric gases affect the climate and could help improve climate change predictions.

Toxin responsible for Legionella growth identified

Posted: 22 Jul 2019 08:59 AM PDT

A team of scientists has discovered that the toxin SidJ in Legionella bacteria enforces a unique modification on human proteins and helps legionella grow inside human cells. SidJ hijacks human protein Calmodulin to its own advantage in one of the classic examples of pathogenic bacteria exploiting the human molecular machinery and turning it against us. This makes SidJ an ideal target to curb Legionella infection.

Gut microbes may affect the course of ALS

Posted: 22 Jul 2019 08:19 AM PDT

New research in mice shows that the gut microbiome may affect the course of amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig's disease.

More sensitive climates are more variable climates

Posted: 22 Jul 2019 08:19 AM PDT

A decade without any global warming is more likely to happen if the climate is more sensitive to carbon dioxide emissions, new research has revealed.

New approach needed to address Anthropocene risk

Posted: 22 Jul 2019 08:19 AM PDT

A team of international researchers suggest adopting a holistic approach to understanding environmental risks.

Astronomers make first calculations of magnetic activity in 'hot Jupiter' exoplanets

Posted: 22 Jul 2019 08:19 AM PDT

Signals from star-planet interactions tell of strong magnetic fields in 'hot Jupiters'.

New mechanism moving droplets at record-high speed and long distance without extra power

Posted: 22 Jul 2019 08:19 AM PDT

A research team has recently devised a novel mechanism to transport droplets at record-high velocity and distance without extra energy input, and droplets can be moved upward along a vertical surface, which has never been achieved before. The new strategy to control droplet motion can open up new potential in applications in microfluidic devices, bio-analytical devices and beyond.

Record-setting quantum motion

Posted: 22 Jul 2019 08:19 AM PDT

Showcasing precise control at the quantum level, physicists have developed a method for making an ion (electrically charged atom) display exact quantities of quantum-level motion -- any specific amount up to 100 packets of energy or 'quanta,' more than five times the previous record high of 17.

Understanding the drivers of a shift to sustainable diets

Posted: 22 Jul 2019 08:19 AM PDT

One of the 21st century's greatest challenges is to develop diets that are both sustainable for the planet and good for our bodies. A new study explored the major drivers of widespread shifts to sustainable diets using a newly developed computational model of population-wide behavioral dynamics.

Canned laughter works, finds new study of 'dad jokes'

Posted: 22 Jul 2019 08:19 AM PDT

Adding canned laughter to the end of a punchline increases how funny we find a joke, but not as much as real laughter, finds a new study.

Risk of neural tube defects higher for babies of women on HIV therapy with dolutegravir

Posted: 22 Jul 2019 08:19 AM PDT

Children born to women on HIV therapy containing the drug dolutegravir since conception have a slightly higher risk of neural tube defects, compared to children born to women on regimens of other antiretroviral drugs.

Beyond finding a gene: Same repeated stretch of DNA in three neurodegenerative diseases

Posted: 22 Jul 2019 08:19 AM PDT

Four different rare diseases are all caused by the same short segment of DNA repeated too many times, a mutation researchers call noncoding expanded tandem repeats. Researchers suspect variations of this type of mutation may cause other diseases that have thus far evaded diagnosis by genetic testing. Researchers are excited because instead of finding unique mutations in specific genes, they identified the same mutation in different areas of the genome causing different diseases.

Combined online self-management for pain, associated anxiety and depression works

Posted: 22 Jul 2019 08:19 AM PDT

Online symptom self-management works to decrease pain, anxiety and depression and for some, online self-management plus nurse telecare helps even more according to a new study. Pain is the most common physical symptom for which adults seek medical attention in US, while anxiety and depression are the most common mental health symptoms. All three symptoms frequently co-occur in this difficult to treat patient population.

Using visual imagery to find your true passions

Posted: 22 Jul 2019 08:19 AM PDT

You may think you know what you like -- how to spend your time or what profession to pursue. But a new study suggests that your pre-existing self-beliefs, as well as cultural stereotypes, may interfere with your memories and keep you from remembering what truly interests you. However, researchers found that one particular mental technique could help us overcome the barriers that block us from finding our passions.

Scientists make fundamental discovery to creating better crops

Posted: 22 Jul 2019 07:59 AM PDT

Scientists have discovered the specific gene that controls an important symbiotic relationship between plants and soil fungi, and successfully facilitated the symbiosis in a plant that typically resists it.

Characteristics in older patients associated with inability to return home after operation

Posted: 22 Jul 2019 07:59 AM PDT

The ACS NSQIP Geriatric Surgery Pilot Project has, for the first time, identified four factors in older patients that are associated with an inability to return home after an operation.

Warning to those wanting to spice up their lives

Posted: 22 Jul 2019 07:59 AM PDT

Think twice before adding that extra kick of chili sauce or chopped jalapeno to your meal. New research shows a spicy diet could be linked to dementia.

Heart disease biomarker linked to paleo diet

Posted: 22 Jul 2019 07:59 AM PDT

People who follow the paleo diet have twice the amount of a key blood biomarker linked closely to heart disease, the world's first major study examining the impact of the diet on gut bacteria has found.

Living components: Programmable structural dynamics successful in self-organizing fiber structures

Posted: 22 Jul 2019 07:59 AM PDT

Scientists have succeeded in programming the dynamics of structures in an artificial chemical system on the basis of DNA components.

Are American nurses prepared for a catastrophe? New study says perhaps not

Posted: 22 Jul 2019 07:59 AM PDT

On average, American colleges and universities with nursing programs offer about one hour of instruction in handling catastrophic situations such as nuclear events, pandemics, or water contamination crises, according to two recent studies.

Targeting old bottleneck reveals new anticancer drug strategy

Posted: 22 Jul 2019 07:59 AM PDT

The enzyme ribonucleotide reductase is a bottleneck for cancer cell growth. Scientists have identified a way of targeting ribonucleotide reductase that may avoid the toxicity of previous approaches, informing focused drug discovery efforts.

More colorectal cancer cases are being diagnosed in younger patients

Posted: 22 Jul 2019 07:59 AM PDT

Average age at diagnosis in the United States has decreased over the past decade.

Enhanced recovery pathway for bariatric operations cuts hospital stays by half

Posted: 22 Jul 2019 07:59 AM PDT

A change in the care protocol of patients undergoing weight-reduction operations exceeded its desired effect by cutting postoperative hospital stays in half, reducing postoperative hospital readmissions by 38 percent, and reducing the amount of opioids the patients were sent home with by 95 percent, according to study results.

When you spot 1 driving hazard, you may be missing another

Posted: 22 Jul 2019 07:33 AM PDT

When people notice one traffic hazard, they are less likely to see a simultaneous second hazard, according to new research. The finding has potential applications for both driver training and the development of automated, in-vehicle safety technologies.

First impressions go a long way in the immune system

Posted: 22 Jul 2019 07:32 AM PDT

An algorithm that predicts the immune response to a pathogen could lead to early diagnosis for such diseases as tuberculosis.

New deactivation mechanism for switch proteins detected

Posted: 22 Jul 2019 07:32 AM PDT

A new mechanism for the deactivation of switch proteins has been identified. Switch proteins such as Ras regulate many processes in the body and affect diseases such as cancer.

Cell membranes: Sophisticated molecular machines in action

Posted: 22 Jul 2019 07:32 AM PDT

Almost all living organisms have gate-like protein complexes in their cell membranes that get rid of unwanted or life-threatening molecules. These ABC transporters are also responsible for resistance to antibiotics or chemotherapy. Researchers have now succeeded in decrypting all the stages of the transport mechanism.

Overstuffed cancer cells may have an Achilles' heel

Posted: 22 Jul 2019 07:32 AM PDT

In a study using yeast cells and data from cancer cell lines, scientists report they have found a potential weak spot among cancer cells that have extra sets of chromosomes, the structures that carry genetic material. The vulnerability, they say, is rooted in a common feature among cancer cells -- their high intracellular protein concentrations -- that make them appear bloated and overstuffed, and which could be used as possible new targets for cancer treatments.

New technique helps create more personalized therapies for people with advanced cancers

Posted: 22 Jul 2019 05:58 AM PDT

Using an ultra-sensitive and high-throughput isolation technology, researchers were able to characterize and identify the neoantigens driving the antitumor responses in a patient.

Failure to launch: Parents are barriers to teen independence

Posted: 22 Jul 2019 05:58 AM PDT

National Poll: While most parents say they are doing enough to prepare their teen for adulthood, they gave low rankings of their teen's ability to handle basic tasks.

Gun ownership linked to greater incidence of domestic homicides

Posted: 22 Jul 2019 05:58 AM PDT

A new study has reveals a unique and strong association between firearm ownership and the risk of domestic homicides. For each 10% increase in household gun ownership rates, the findings show a significant 13% increased incidence of domestic firearm homicide. The homicide risk differed across victim-offender relationships, with non-domestic firearm homicide rising only 2% among firearm owners.

School readiness impaired in preschoolers with ADHD symptoms

Posted: 22 Jul 2019 05:58 AM PDT

Preschoolers with symptoms of attention-deficit hyperactivity disorder are much less likely than other children their age to be ready for school, new research has found.

Phthalate MEHP and cardiac arrhythmias

Posted: 22 Jul 2019 05:58 AM PDT

A new study examines the potential role plastic exposure, akin to exposure in a medical setting, has on heart rhythm disruptions.

Children with autism more likely to be bullied at home and at school, study finds

Posted: 22 Jul 2019 05:58 AM PDT

A major new study has found children with autism are more likely to be bullied by both their siblings and their peers, meaning that when they return from school, they have no respite from victimization.

Epileptic seizures reduced in mice after removal of newborn neurons

Posted: 22 Jul 2019 05:58 AM PDT

Epileptic seizures happen in one of every 10 people who have experienced a traumatic brain injury (TBI). However, new research has uncovered an innovative approach to possibly slow the progression of epilepsy. Researchers have successfully removed new neurons that have developed after a brain injury to reduce seizures in mice. They believe that the technique could potentially reduce post-injury epilepsy.