What has fluid physics to do with the spreading of the Corona virus? Whirlpools and pandemics seem to be rather different things, certainly in terms of comfort. Yet, newest findings about epidemic spreading come from Physics professor Björn Hof and his research group at the Institute of Science and Technology Austria (IST Austria), who specialize in fluids and turbulent flows. When early last year Björn Hof had to cancel his scheduled visit to Wuhan, his wife's hometown, his focus abruptly shifted to epidemic spreading. "My group normally investigates turbulent flows in pipes and channels", he explains, "Over the last 10 years we have shown that the onset of turbulence is described ...

Infertility affects females and males equally. In male infertility, azoospermia (a medical condition with no sperm in semen) is a major problem that prevents a couple from having a child. For the treatment of patients with azoospermia, testicular sperm extraction (TESE) is required to obtain mature sperms. When examined, histological specimens are typically given a score, called the Johnsen score, on a scale of 1 to 10, based on the histopathological features of the testis. "The Johnsen score has been widely used in urology since it was first reported 50 ...

Researchers at Linköping University, Sweden, have made several discoveries on the functioning mechanisms of the inner hair cells of the ear, which convert sounds into nerve signals that are processed in the brain. The results, presented in the scientific journal Nature Communications, challenge the current picture of the anatomical organisation and workings of the hearing organ, which has prevailed for decades. A deeper understanding of how the hair cells are stimulated by sound is important for such matters as the optimisation of hearing aids and cochlear implants for people with hearing loss. In ...

In 1884, Edwin Abbott wrote the novel Flatland: A Romance in Many Dimensions as a satire of Victorian hierarchy. He imagined a world that existed only in two dimensions, where the beings are 2D geometric figures. The physics of such a world is somewhat akin to that of modern 2D materials, such as graphene and transition metal dichalcogenides, which include tungsten disulfide (WS2), tungsten diselenide (WSe2), molybdenum disulfide (MoS2) and molybdenum diselenide (MoSe2). Modern 2D materials consist of single-atom layers, where electrons can move ...

UK landowners and conservationists welcome wider-spread use of Gene Conservation Units (GCUs) to help protect some of the rarest plants and insects, research at the University of York has shown. In particular the Great Yellow Bumblebee and the Mountain Ringlet Butterfly, which are at risk of further population decline, would benefit from Gene Conservation Units, currently only employed for forest trees and agricultural species or their relatives. Genetic diversity in these species is essential if they are to adapt to new, and often challenging, environmental conditions. Gene Conservation Units are areas of land managed to allow the recovery of species, and maintain evolutionary processes to enable them to adapt to environmental change. For tree species, ...

FRANKFURT. When the SARS-CoV-2 virus mutates, this initially only means that there is a change in its genetic blueprint. The mutation may lead, for example, to an amino acid being exchanged at a particular site in a viral protein. In order to quickly assess the effect of this change, a three-dimensional image of the viral protein is extremely helpful. This is because it shows whether the switch in amino acid has consequences for the function of the protein - or for the interaction with a potential drug or antibody. Researchers at Goethe University Frankfurt and TU Darmstadt began networking internationally from the very start of the pandemic. Their goal: to describe the three-dimensional structures ...

Thousands of sharks have been illegally caught in a Marine Protected Area (MPA) in the Indian Ocean, new research shows. The MPA was created in 2010 around the Chagos Archipelago, also known as the British Indian Ocean Territory (BIOT), banning all fishing there. The new study examined information on illegal fishing in the MPA - a vast (640,000 km²/250,000 mi2) area containing pristine and remote reefs. Enforcement data suggests more than 14,000 sharks were caught in the MPA from 2010-20, but discussions with fishers in the region suggest the true number was "considerably ...

BEER-SHEVA, Israel May 10, 2021 - Researchers from Ben-Gurion University (BGU), together with American and German colleagues, have developed new "molecular tweezers" to combat antibiotic-resistant bacteria. Their recently announced findings were published in Cell Chemical Biology. For years, medical professionals have struggled with bacterial infections becoming increasingly resistant to antibiotics. These molecular tweezers may be the key to battling one of greatest public health issues of the 21st century. "Our discovery prevents infection without building up antibiotic resistance, and it might even be preferable to develop treatments based on molecular tweezers rather than antibiotics," said BGU Department of Chemistry Prof. Raz Jelinek. The research team, led ...

Bamboo cricket bats are stronger, offer a better 'sweet spot' and deliver more energy to the ball than those made from traditional willow, tests conducted by the University of Cambridge show. Bamboo could, the study argues, help cricket to expand faster in poorer parts of the world and make the sport more environmentally friendly. "The sound of leather on willow" may have delighted cricket lovers for generations but the sport should now consider making the blades of its bats with bamboo, say researchers from Cambridge's Centre for Natural Material Innovation. ...

A group of UK academics are calling for targets for mental health in order to meet the healthcare challenges of the next decade. Published today in Journal of Mental Health researchers set out four overarching goals that will speed up implementation of mental health research and give a clear direction for researchers and funders to focus their efforts when it comes to better understanding the treatment of mental health. The treatment of mental illness currently brings substantial costs to not only the NHS, but also to the individual and wider society, and the need for innovation to promote good mental health has never ...

New research being presented at the European Congress on Obesity (ECO) held online this year, suggests that among girls a low body mass index (BMI) during childhood indicates a higher risk of developing anorexia nervosa as young adults, whereas a high BMI or overweight in childhood indicates a higher risk of bulimia nervosa. "By examining the records of thousands of girls over their lifetime in national health registers, we have discovered early warning profiles that could signal girls at risk for anorexia nervosa and bulimia nervosa", says lead author Dr Britt Wang Jensen ...

New research being presented at The European Congress on Obesity (ECO) held online this year, suggests that a measure of body shape should be used alongside body mass index (BMI) to help determine the risk of obesity-related cancers. BMI is a simple way of measuring body fat from the weight and height of a person. But its reliability is often criticised, because it does not distinguish fat from muscle, or take into account where body fat is stored or an individual's sex or age. Similarly, waist circumference takes into account belly fat, which is linked to several health risks ...

Obesity increases the risk of developing 10 of the most common cancers, regardless of how it is measured, according to a study of more than 400,000 adults in the UK, being presented at The European Congress on Obesity (ECO) held online this year, with central fatness (larger waist and hips) and general obesity (body mass index [BMI] and body fat percentage) associated with similar estimates of cancer risk. The results suggest that BMI is an adequate measure of cancer risk from excess weight, and there is no advantage in using more complicated or expensive measures such as waist circumference or body fat percentage. It is well known that being overweight or obese is linked to an elevated risk of some cancers and premature ...

A study of more than 173,000 women in Denmark, presented at the European Congress on Obesity (ECO) held online this year, suggests that girls with a higher body mass index (BMI) during childhood are less likely than their peers with a lower BMI to develop breast cancer as adults, both before and after the menopause. The findings contrast with those for adult BMI, which indicate that women who gain weight after menopause have an increased risk of postmenopausal breast cancer. While the authors are unsure why children with a higher BMI appear to be protected ...

New research presented at this year's European Congress on Obesity (held online, 10-13 May) finds evidence that structures called inflammasomes (a part of the innate immune system that helps to regulate inflammation) could play an important role in the development of obesity-associated colon cancer. The study is by Dr Victoria Catalán and Professor Gema Frühbeck, University Hospital Navarra and CIBEROBN, Instituto de Salud Carlos III, Pamplona, Spain, and colleagues. Inflammasomes* form part of the innate immune system which provides the first line of defence against pathogens using a wide range of physical, chemical, ...

Researchers have successfully developed a new Strep A human challenge model, paving the way to test vaccines against the common deadly bacteria that causes sore throats, scarlet fever and skin sores. The collaborative research effort, led by the Murdoch Children's Research Institute (MCRI) and published in The Lancet Microbe, found the model, which deliberately infected healthy adult volunteers with the bacteria in a controlled environment, was safe and would now be used to trial Strep A candidate vaccines. Strep A infections affect about 750 million people and kill more than 500,000 globally every year - more than influenza, ...

A complicated interaction between different proteins is needed for information to pass from one nerve cell to the next. Researchers at the Martin Luther University Halle-Wittenberg (MLU) have now managed to study this process in the synaptic vesicles, which play an important role in this process. The study appeared in the journal Nature Communications. Several billion nerve cells communicate with each other in the body so that humans and other living beings can perceive and react to their environment. A host of complex chemical and electrical processes occur within a few milliseconds. "Special messenger substances - known as neurotransmitters - are released at the synapses of the nerve cells. They transmit information between the individual nerve cells," explains Dr Carla Schmidt, ...

A study presented at this year's European Congress on Obesity (held online, 10-13 May) supports recommendations to avoid pregnancy for 12 months after bariatric (obesity) surgery due to an association with adverse outcomes in pregnancy including an elevated risk of preterm birth. The study is by Dr Laura Heusschen, Vitalys Obesity Clinic, part of Rijnstate Hospital, Arnhem, The Netherlands, and colleagues. More than half of all female patients who undergo bariatric surgery are of reproductive age, and the resulting weight loss improves fertility, as well as reducing the risk of gestational diabetes and hypertensive disorders during pregnancy. It also ...

The first global review of complementary medicines (herbal and dietary supplements) for weight loss in 16 years--combining 121 randomised placebo-controlled trials including nearly 10,000 adults--suggests that their use cannot be justified based on the current evidence. The findings of two studies, being presented at The European Congress on Obesity (ECO) held online this year, suggest that although some herbal and dietary supplements show statistically greater weight loss than placebo, it is not enough to benefit health, and the authors call for more research into their long-term safety. "Over-the-counter ...

Vegetarians appear to have a healthier biomarker profile than meat-eaters, and this applies to adults of any age and weight, and is also unaffected by smoking and alcohol consumption, according to a new study in over 166,000 UK adults, being presented at this week's European Congress on Obesity (ECO), held online this year. Biomarkers can have bad and good health effects, promoting or preventing cancer, cardiovascular and age-related diseases, and other chronic conditions, and have been widely used to assess the effect of diets on health. However, evidence of the metabolic benefits associated with being vegetarian is unclear. To understand ...

Lugano, Switzerland, 8 May 2021 - The finding that breast tumours can evolve to express low HER2 potentially widens the number of patients who can benefit from new investigational agents, typically novel antibody-drug conjugate therapies, that are currently in clinical trials for HER2-low tumours. The first study of its kind exploring how breast cancers change from the primary to the recurrent tumour has revealed that nearly 30% of breast cancer patients convert from, or to, human epidermal growth factor receptor (HER)2-low status. Specifically, the study found that 14% of triple-negative breast cancers with HER2-negative expression (also referred to as HER2-0) in the primary tumour converted to HER2-low expression in the recurrent tumour ...

Mild Covid-19 infection is very unlikely to cause lasting damage to the structure or function of the heart, according to a study led by UCL (University College London) researchers and funded by the British Heart Foundation (BHF) and Barts Charity. The researchers say the results, published in JACC Cardiovascular Imaging, should reassure the public, as they relate to the vast majority of people who had Covid-19 infections with mild or no symptoms. This study of 149 healthcare workers recruited from Barts Health and Royal Free London NHS Trusts is the largest and most detailed study to date into ...

The air in the United States and Western Europe is much cleaner than even a decade ago. Low-sulfur gasoline standards and regulations on power plants have successfully cut sulfate concentrations in the air, reducing the fine particulate matter that harms human health and cleaning up the environmental hazard of acid rain. Despite these successes, sulfate levels in the atmosphere have declined more slowly than sulfur dioxide emissions, especially in wintertime. This unexpected phenomenon suggests sulfur dioxide emission reductions are less efficient than expected for cutting sulfate aerosols. A new study led by Tokyo ...

The use of non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, does not lead to higher rates of death or severe disease in patients who are hospitalised with COVID-19, according to a new observational study of more than 72,000 people in the UK published in The Lancet Rheumatology journal. NSAIDs are common treatments for acute pain and rheumatological diseases such as rheumatoid arthritis and osteoarthrosis. Early in the pandemic, there was debate on whether the use of such drugs increased the severity of COVID-19, which led to urgent calls for investigations between NSAIDs and COVID-19. The ISARIC CCP-UK (International Severe Acute Respiratory and emerging ...

The most comprehensive study of the family tree for legumes, the plant family that includes beans, soybeans, peanuts, and many other economically important crop plants, reveals a history of whole-genome duplications. The study also helps to uncover the evolution of genes involved in nitrogen fixation--a key trait likely important in the evolutionary spread and diversification of legumes and vital for their use as "green manure" in agriculture. To reconstruct the family tree, researchers compared the DNA sequence of more than 1500 genes from 463 different legume species, including 391 newly sequenced species, that span the diversity of this large plant family. A paper describing the ...