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Categories: Biology: Biochemistry, Environmental: General
Published Scientists link certain gut bacteria to lower heart disease risk
(via sciencedaily.com) Original source Changes in the gut microbiome have been implicated in a range of diseases including type 2 diabetes, obesity, and inflammatory bowel disease. Now, a team of researchers has found that microbes in the gut may affect cardiovascular disease as well. The team has identified specific species of bacteria that consume cholesterol in the gut and may help lower cholesterol and heart disease risk in people.
Published Gloom and doom warnings about climate change do not work
(via sciencedaily.com) Original source How do you spread a message about climate change? According to an international study involving 59,000 participants, some tactics may actually reduce support.
Published We've had bird evolution all wrong
(via sciencedaily.com) Original source Genomic anamolies dating back to the time of the dinosaurs misled scientists about the evolutionary history of birds.
Published New antibiotic class effective against multidrug-resistant bacteria
(via sciencedaily.com) Original source Scientists have discovered a new class of antibiotics with potent activity against multi-drug resistant bacteria, and have shown that it cures bloodstream infections in mice. Two publicly-funded initiatives dedicated to advancing early-stage antibiotic development, ENABLE and ENABLE-2, provided the resources and expert support without which this antibiotic would not have been developed.
Published Computational tools fuel reconstruction of new and improved bird family tree
(via sciencedaily.com) Original source Using cutting-edge computational methods and supercomputing infrastructure, researchers have built the largest and most detailed bird family tree to date -- an intricate chart delineating 93 million years of evolutionary relationships between 363 bird species, representing 92% of all bird families. The updated tree reveals sharp increases in effective population size, substitution rates and relative brain size in early birds in the aftermath of the mass extinction event that wiped out the dinosaurs 66 million years ago. And by closely examining one of the branches of this tree, researchers found that flamingos and doves are more distantly related than previous genome-wide analyses had shown.
Published Engineers 'symphonize' cleaner ammonia production
(via sciencedaily.com) Original source Among the many chemicals we use every day, ammonia is one of the worst for the atmosphere. The nitrogen-based chemical used in fertilizer, dyes, explosives and many other products ranks second only to cement in terms of carbon emissions, due to the high temperatures and energy needed to manufacture it. But by improving on a well-known electrochemical reaction and orchestrating a 'symphony' of lithium, nitrogen and hydrogen atoms, engineers have developed a new ammonia production process that meets several green targets.
Published Exposure to common environmental carcinogens linked to decreased lifespan happiness
(via sciencedaily.com) Original source Researchers found that exposure to environmental carcinogens and psychological distress is significantly linked to decreased happy life expectancy, a measure of the lifespan during which an individual experiences subjective emotional wellbeing. These findings suggest that developing public health policies to reduce exposure to these chemicals could help people live longer, happier lives.
Published Simple equations clarify cloud climate conundrum
(via sciencedaily.com) Original source New analysis based on simple equations has reduced uncertainty about how clouds will affect future climate change.
Published Machine learning provides a new picture of the great gray owl
(via sciencedaily.com) Original source Researchers upend the notion that the iconic great gray owl -- known as the phantom of the North -- lives far from cities, towns and other markers of human density.
Published Pilot study shows ketogenic diet improves severe mental illness
(via sciencedaily.com) Original source A small clinical trial found that the metabolic effects of a ketogenic diet may help stabilize the brain.
Published Mosquito detectives track malaria's history
(via sciencedaily.com) Original source A group of researchers is calling on colleagues around the world to join them in what they call 'pathogen prospecting' by tracking down archival specimens of mosquitoes in museums and other collections to examine them for pathogens that would have infected people with malaria while feeding on their blood.
Published Do sweeteners increase your appetite? New evidence from randomised controlled trial says no
(via sciencedaily.com) Original source Replacing sugar with artificial and natural sweeteners in foods does not make people hungrier -- and also helps to reduce blood sugar levels, a significant new study has found. The double blind randomized controlled trial found that consuming food containing sweeteners produced a similar reduction in appetite sensations and appetite-related hormone responses as sugary foods -- and provides some benefits such as lowering blood sugar, which may be particularly important in people at risk of developing type 2 diabetes. The use of sweeteners in place of sugar in foods can be controversial due to conflicting reports about their potential to increase appetite. Previous studies have been carried out but did not provide robust evidence. However, the researchers say their study, which meets the gold standard level of proof in scientific investigation, provides very strong evidence that sweeteners and sweetness enhancers do not negatively impact appetite and are beneficial for reducing sugar intake.
Published When inequality is more than 'skin-deep': Social status leaves traces in the epigenome of spotted hyenas in Tanzania
(via sciencedaily.com) Original source A research consortium provides evidence that social behavior and social status are reflected at the molecular level of gene activation (epigenome) in juvenile and adult free-ranging spotted hyenas. They analyzed non-invasively collected gut epithelium samples from both high-ranking and low-ranking female hyenas and showed that rank differences were associated with epigenetic signatures of social inequality, i.e., the pattern of activation or switching off of genes that regulate important physiological processes such as energy conversion and immune response in several genome regions.
Published How the Crimean-Congo hemorrhagic fever virus enters our cells
(via sciencedaily.com) Original source Researchers have identified how the tick-borne Crimean-Congo haemorrhagic fever virus enters our cells. The results are an important step in the development of drugs against the deadly disease.
Published Genomic research may help explain cancer resistance in Tasmanian devils
(via sciencedaily.com) Original source Through DNA sequencing of Tasmanian devils and their tumors, researchers have tracked the genomic interactions between the animals and the cancer.
Published Manganese plays a surprising role in soil carbon sequestration
(via sciencedaily.com) Original source A recent study reveals an unexpected link between manganese -- a naturally occurring mineral -- and increased carbon emissions from high-latitude boreal forests. The study uncovers how manganese increases carbon emissions from boreal forest soil, over time, challenging conventional understanding of the role of manganese in the carbon cycle.
Published Blueprint for mandating indoor air quality for public buildings in form of standards
(via sciencedaily.com) Original source A group of international experts has presented a blueprint for national indoor quality standards for public buildings. The experts addressed setting standards for three key indoor pollutants -- carbon dioxide, carbon monoxide, and PM2.5 (particles so small they can lodge deep in the lungs and enter the bloodstream) -- and ventilation rate.
Published New imaging method illuminates oxygen's journey in the brain
(via sciencedaily.com) Original source A new bioluminescence imaging technique has created highly detailed, and visually striking, images of the movement of oxygen in the brains of mice. The method, which can be easily replicated by other labs, will enable researchers to more precisely study forms of hypoxia in the brain, such as the denial of oxygen to the brain that occurs during a stroke or heart attack. The new research tool is already providing insight into why a sedentary lifestyle may increase risk for diseases like Alzheimer's.
Published Researchers discover key gene for toxic alkaloid in barley
(via sciencedaily.com) Original source Barley is one of the most important cereal crops on a global scale. Many barley cultivars produce a toxic alkaloid called gramine that affects the suitability of barley as fodder, but also helps to protect barley from pathogens. So far, the potential of manipulating gramine levels has not been harnessed for plant breeding, because the genetic basis of gramine production has been unresolved. Research groups now disclose the complete biosynthetic pathway of gramine and demonstrate how gramine biosynthesis can be introduced into model organisms or removed from barley.
Published New approach to monitoring freshwater quality can identify sources of pollution, and predict their effects
(via sciencedaily.com) Original source Analysing the diversity of organic compounds dissolved in freshwater provides a reliable measure of ecosystem health, say scientists.