The purified water is compared with its original source, as well as a reference sample from the tap. Photo: KTH Royal Institute of Technology
What can the forests of Scandinavia possibly offer to migrants in faraway refugee camps? Clean water may be one thing. A bacteria-trapping material developed from wood by researchers KTH Royal Institute of Technology is now being tested for use as a water purification filter. The aim is to use it in places where there is no infrastructure or clean water supply. The material, which combines wood cellulose with a positively-charged polymer, can trap bacteria by attracting and binding the bacteria to the material surface. It shows promise for bandages, plasters and packaging that kill bacteria without releasing toxins into the environment. Led by Professor Monica Ek, the Swedish research team is investigating whether the material can enable portable on-site water treatment where no facilities or wells exist to meet demand.
Drinking horns were status symbols and widely used as gifts, both in the Middle Ages and in the centuries after the Reformation. The picture shows one of the few drinking horns that have remained in Icelandic possession, called the "Three kings horn." It shows Saint Olav juxtaposed with Old Testament kings Solomon and David. Photo: National Museum of Iceland
After the Reformation, Norway's Olav Haraldsson was no longer supposed to be worshipped as a saint. An Icelandic drinking horn offers some clues on how the saint’s status changed over time. Drinking horns were considered valuable objects, and were imbued with great symbolic value in the Middle Ages. Among other things, it was said that these kinds of horns came from the foot or claw of the fabled griffin. Drinking horns often had names, and were status symbols and collector’s items. Some were stolen and many ended up in princely cabinets. “Mediaeval drinking horns are scattered in collections throughout northern Europe. They were coveted collectibles. Mediaeval art often remained in churches until it went out of fashion or was removed due to errors in iconography, whereas drinking horns ended up in princely collections and cabinets and have kept their status to the present day,” says Associate Professor Margrethe Stang, from the Norwegian University of Science and Technology’s (NTNU) Department of Art and Media Studies.
Antarctica. Photo: Pablo Ruiz, Instituto Antártico Chileno (INACH)
For over 70 years seven different countries have claimed sovereignty over parts of Antarctica. But are these claims legitimate? This issue is now going to be considered by a group of philosophers. Queen Maud's Land constitutes one sixth of Antarctica, and Norway has claimed this territory since 1939, but this has never been approved by the rest of the world. The same applies to the claims of six other countries; New Zealand, Australia, France, Great Britain, Chile and Argentina have all made territorial claims over different parts of Antarctica. All of these countries also believe that they have an entitlement to the South Pole. A group of philosophers from Norway, Ireland, Canada, Australia, the United Kingdom and Chile are now getting to grips with this matter. They believe that it is high time to look at these claims from a moral point of view.
The American Society of Clinical Oncology (ASCO) today issued a clinical practice guideline on human papillomavirus (HPV) vaccination for the prevention of cervical cancer. This is the first guideline on primary prevention of cervical cancer that is tailored to multiple regions of the world with different levels of socio-economic and structural resource settings, offering evidence-based guidance to health care providers worldwide. The guideline includes specific recommendations according to four levels of resource settings: basic, limited, enhanced and maximal. The levels pertain to financial resources of a country or region, as well as the development of its health system — including personnel, infrastructure and access to services. The guideline complements ASCO’s two other global, resource-stratified guidelines on cervical cancer, also stratified to these four levels of resources.1,2
Patients with recurrent fainting episodes (syncope) who received a pacemaker delivering a pacing program designed to detect and stop the abnormal heart rhythms that precede syncope had a seven-fold reduction in fainting compared with patients in a placebo pacing group, according to research presented at the American College of Cardiology’s 66th Annual Scientific Session. The study—the first prospective double-blind placebo-controlled trial to show robustly positive results for the pacing program, known as Closed Loop Stimulation (DDD-CLS), in patients with recurrent syncope—met its primary endpoint of a significant reduction in fainting episodes with DDD-CLS compared to placebo pacing.
Boran Cattle in Africa
A ‘world-first’ study of the genomes of indigenous cattle in Africa has revealed vital clues that will help secure the future of cattle production on the continent. Cattle are an increasingly important resource in Africa as sustainable sources of food, milk, traction and manure. With its human population growing and the economy and subsequent wealth predicted to expand greatly, there will also be a huge increase in demand for livestock. Now Professor Olivier Hanotte from The University of Nottingham and the International Livestock Research Institute (ILRI) in Ethiopia, with Professor Heebal Kim from Seoul National University, have mapped the genomes of five breeds of African cattle and discovered some unique genetic adaptations that could inform and improve future breeding programs. The research is published in the journal Genome Biology.
Cells infected by the deadly Ebola virus may release viral proteins such as VP40 packaged in exosomes, which, as new research indicates, can affect immune cells throughout the body impairing their ability to combat the infection and to seek out and destroy hidden virus. The potential for exosomal VP40 to have a substantial impact on Ebola virus disease is examined in a review article published in DNA and Cell Biology, a peer-reviewed journal from Mary Ann Liebert, Inc., publishers. The article is available free on the DNA and Cell Biology website until April 13, 2017.
Scientists looking for new tumor viruses have to keep an eye out for the virus genes rather than the viral particles. This year's winners of the Paul Ehrlich and Ludwig Darmstaedter Prize were twice successful with this strategy.
Two Americans, Yuan Chang and Patrick S. Moore, will receive the 2017 Paul Ehrlich and Ludwig Darmstaedter Prize today in Frankfurt's Paulskirche for their discovery of the tumor viruses HHV-8 and MCV by means of a clever subtraction strategy. HHV-8 is the human herpesvirus 8, and MCV stands for Merkel cell polyomavirus. "With their decision to search for the viral genes rather than the viral particles, the prizewinners have taken a major step forward in the hunt for new human tumor viruses and have laid the foundation for further discoveries. The discovery of further human tumor viruses in future remains a distinct possibility," wrote the Scientific Council in substantiating its decision. One in every six cancers in the world is related to a viral infection However, the risk of cancer from a viral infection is lower in the Western industrial countries than in the developing world. Yuan Chang is Professor of Pathology at the University of Pittsburgh Cancer Institute. Patrick Moore is Professor and Director of the Cancer Virology Program at the University of Pittsburgh Cancer Institute. They are a wife and husband team.
New research from DTU and partners from NASA’s Jet Propulsion Laboratory and the University of New Brunswick shows that eruptions on the Sun’s surface not only send bursts of energetic particles into the Earth’s atmosphere causing disturbances in our planet’s magnetic field, they can also strangely decrease the number of free electrons over large areas in the polar region of the ionosphere. Eruptions on the Sun’s surface, also called solar storms, trigger geomagnetic storms and this usually causes disturbances globally in the ionosphere and the magnetosphere, which is the region of the atmosphere governed primarily by the Earth’s magnetic field. Now new research shows that these eruptions on the sun’s surface not only send bursts of energetic particles into the Earth’s atmosphere causing disturbances in the magnetic field, but they may also significantly decrease the number of free electrons over large areas in the polar region of the ionosphere — the ionized part of the upper atmosphere.