750,298 articles

We have no idea if the Russian Covid vaccine is safe or effective | Gideon Meyerowitz-Katz

The only discernible difference between Russia’s vaccine and others is that this one has skipped most of the testing phases • Russia’s coronavirus vaccine: will it work, and is it safe?Throughout the Covid-19 pandemic, there’s been one hope that we’ve all relied on. We’re all waiting, with baited breath, for the day that scientists announce a successful coronavirus vaccine, because...

'Could I feel what they were doing? Yes': Rob Delaney on the pain and pleasure of his vasectomy

The actor and comedian decided it was time to have the procedure after he and his wife had had four children. Here he writes candidly about the experience, and why it was the kindest cutI got a vasectomy a few months ago. A vasectomy is when they cut and tie off the vas deferens, which are these little tubes in your ball sack (scrotum) so that there’s no sperm (sperm) in your jizz (semen) when...

Global report: New Zealand begins mass testing as Australia records deadliest day

New Zealand to conduct ‘tens of thousands’ of tests; 21 deaths recorded in Australian state of Victoria; US health secretary sceptical of Russia vaccineCoronavirus – latest updatesSee all our coronavirus coverageAustralia suffered its deadliest day of the pandemic so far, with 21 deaths in the state of Victoria, as authorities in New Zealand’s largest city prepared to conduct “tens of...

Age, education, and surgical history affect hormone use after oophorectomy

CLEVELAND, Ohio (August 12, 2020)--Removal of the ovaries before natural menopause (surgical menopause) often exacerbates menopause symptoms and places women at increased risk for heart disease, osteoporosis, and cognitive decline. A new study identified the frequency of hormone therapy (HT) use and factors that determine who is more likely to use hormones after oophorectomy to manage symptoms....

KERI creates a super-high-resolution nano display based on the 3D printing close to virtual reality

Companies across the world are competing fiercely to provide high-resolution displays to electronic devices such as TVs and smartphones. In particular, the virtual reality, a keyword of the 4th industrial revolution, requires a much higher resolution to improve the picture quality. A Korean research team developed a technology to produce a 'nano display' with a phenomenal resolution based on the...

Molecular additives enhance mechanical properties of organic solar cell material

Ganesh Balasubramanian, P.C. Rossin assistant professor of Mechanical Engineering & Mechanics at Lehigh University, and his graduate student Joydeep Munshi demonstrated that adding small molecules to a semiconducting polymer blend enhances the performance and stability of material used in organic solar cells. The study is described in an article, 'Elasto-morphology of P3HT:PCBM bulk heterojunction...

Pressure-induced 2D-3D conversion in hybrid lead iodide layered perovskite

Here, we demonstrate that 2D D-J perovskites experiencevarious transitions under pressure, such as crystalline-amorphous and 2D-three-dimensional structural transformation, and theprobable metallization are strongly suggested. Moreover, thefundamental changes in the material properties are observed at ambient conditions after pressure treatment, which is crucial for achieving the desired...

Secretion of sugar polymers modulates multicellularity in the bacterium Myxococcus xanthus

Research by INRS (Institut National de la Recherche Scientifique) Professor Salim Timo Islam has revealed that multicellular physiology in the social bacterium Myxococcus xanthus--a bacterium that can actively reorganize its community according to the environment in which it is found--is modulated by the secretion of two natural sugar polymers in separate zones of a swarm. Results from their...

'AeroNabs' promise powerful, inhalable protection against COVID-19

Scientists have devised a novel approach to halting the spread of SARS-CoV-2, the virus that causes COVID-19. The researchers engineered a completely synthetic, production-ready molecule that straitjackets the crucial SARS-CoV-2 machinery that allows the virus to infect our cells. In an aerosol formulation they tested, these molecules could be self-administered with a nasal spray or inhaler.

Coronavirus live news: Lebanon sees record cases after blast; New Zealand's biggest city heads into lockdown

WHO warns displacement of people in Beirut risks accelerating Covid-19 spread; four new cases in Auckland, New Zealand; Australia suffers deadliest day. Follow the latest updatesRussia approves vaccine despite testing concernsFrench and Dutch on alert over rise in casesLost on the frontline: the 900 US health workers who have diedSee all our coronavirus coverage 3.59am BST Nibarchana Oli has tried...

Health disparities among former NFL players

Among former NFL players, Black, Hawaiian, and athletes from other racial backgrounds report worse physical, mental health outcomes than white players. The widest health gaps emerged between Black and white former NFL players. Black former players reported worse health outcomes in all five health categories, compared with their white peers. Presence of health disparities among former NLF players...

Business travel identified as driver of economic growth

New research finds a direct link between a country's incoming business travel and the growth of new and existing industries. The findings support a Growth Lab hypothesis that moving 'knowhow' is critical to economic growth, and business travel plays a key part in that process. The research also raises new concerns about the economic implications of the international travel restrictions imposed to...


TUESDAY 11. AUGUST 2020


Optics research demonstrates waveguides that guarantee stable propagation of azimuthons

The optical vortex plays an increasingly important role in optical information processing. As an information carrier, it improves the capacity of channels and offers an independent aspect for analysis—different from polarization, intensity, phase, and path. A new degree of freedom for encoding and encrypting optical information may be provided via nonlinear optics, using vortex beams known as...