Culture
Cyclic molecules are everywhere, and everything around us stems from the way they are assembled: not just taste, colour and smell but also (for example) pharmaceutical drugs. Nature by itself forms molecular rings of different sizes and chains of rings of varying lengths that scientists are able to reproduce artificially. Chemists from the University of Geneva (UNIGE) have now devised a new technique for creating these chains of molecular rings that do not use standard chemical interactions but contact with large molecular surfaces that are electron-poor and do not exist in nature.
Hundreds of Aboriginal men who became native mounted police in colonial Australia carried a significant burden of responsibility for law and order for white settlers in Queensland and other settlements.
A long-running ARC-funded archaeology project has turned the lens on the recruitment to the Queensland Native Mounted Police and their part in the violent 'frontier wars' - which created long-term traumatic impacts on the lives of the Indigenous people involved.
Separation anxiety in dogs should be seen as a symptom of underlying frustrations rather than a diagnosis, and understanding these root causes could be key to effective treatment, new research by animal behaviour specialists suggests.
Many pet owners experience problem behaviour in their dogs when leaving them at home. These behaviours can include destruction of household items, urinating or defecating indoors, or excessive barking and are often labelled as 'separation anxiety' as the dog gets anxious at the prospect of being left alone.
An excessive amount of carbon dioxide is the main cause of climate change. One of the best approaches is to capture and convert carbon dioxide (CO2) into fuel such as methane. On the other hand, a sustainable way to solve the energy problem is to generate alternative energy source, however, challenges related to the storage of renewable electricity are preventing the development of these technologies.
An immune reaction in the brain seems to play a major role in the development of Alzheimer's disease. In a way, it "adds fuel to the fire" and apparently causes an inflammation that, in a sense, keeps kindling itself. The study has now been published in the journal Cell Reports.
This scene of stellar creation, captured by the NASA/ESA Hubble Space Telescope, sits near the outskirts of the famous Tarantula Nebula. This cloud of gas and dust, as well as the many young and massive stars surrounding it, is the perfect laboratory to study the origin of massive stars.
Nagging negative thoughts - and striving for perfection - keep teenagers awake at night, raising their chance of becoming depressed and anxious, a new study shows.
An online study of almost 400 adolescents aged 14 to 20 years confirmed the link, leading sleep researchers at Flinders University to recommend alternative treatments for repetitive negative thinking and perfectionism in dealing with delayed sleep and mental health problems among teenagers.
Using the amphibian Xenopus laevis as a model, Drs. Noriyuki Kinoshita and Naoto Ueno from the National Institute for Basic Biology (NIBB), Japan and Dr. Ileana Cristea from Princeton University, USA have demonstrated that physical forces, such as centrifugal force, enhance cell-to-cell attachment and increase the stiffness of embryonic tissues as a result of force induced cell shape change. In addition, they have also elucidated a part of the signaling pathway underlying the phenomenon.
Our DNA determines a large part of our risk for Alzheimer's disease, but it remained unclear how many genetic risk factors contribute to disease. A team led by Prof. Bart De Strooper (VIB-KU Leuven) and Dr. Mark Fiers now show that many of risk factors affect brain maintenance cells called microglia, and more particularly their response to amyloid-beta, one of the proteins aggregating in the brains of Alzheimer patients. The individual effects of small genetic variations are likely small, but the combination of hundreds of such subtle alterations might tip the balance and cause disease.
In the sunlit surface layer of the ocean, photosynthetic microalgae such as diatoms convert more carbon dioxide into biomass than Earth's tropical forests. Like land plants, diatoms sequester carbon dioxide into polymeric carbohydrates - in other words: into long-chained sugars. However, it has proven difficult to quantify how much carbon dioxide can be stored in the global oceans throughout this process.
Maggots on a dead body or wound can help pinpoint when a person or animal died, or when maltreatment began in elder, child care or animal neglect cases. However, the current process for making this determination is time consuming and resource intensive. It also relies on species assessment by trained entomologists. Now, researchers report in ACS' Analytical Chemistry the development of a molecular maggot analysis method that's quick, easy and less subjective.
Like a snapshot, amber preserves bygone worlds. An international team of paleontologists from the University of Bonn has now described four new beetle species in fossilized tree resin from Myanmar, which belong to the Kateretidae family. They still exist today, with only a few species. As well as the about 99 million years old insects, the amber also includes pollen. It seems that the beetles helped the flowering plants to victory, because they contributed to their propagation. In turn, the beetles benefited from the new food source.
CAMBRIDGE, MA -- As flowers bloom and fruits ripen, they emit a colorless, sweet-smelling gas called ethylene. MIT chemists have now created a tiny sensor that can detect this gas in concentrations as low as 15 parts per billion, which they believe could be useful in preventing food spoilage.
The sensor, which is made from semiconducting cylinders called carbon nanotubes, could be used to monitor fruit and vegetables as they are shipped and stored, helping to reduce food waste, says Timothy Swager, the John D. MacArthur Professor of Chemistry at MIT.
In the neotropical forest of Barro Colorado Island in Panama, an unusual bee hatched: half male and half female. The Smithsonian Tropical Research Institute students and scientists working on nocturnal, socially flexible Megalopta bees at BCI recognized it as a gynandromorph: a rare condition that results in the expression of both male and female characteristics.
A new study adds to mounting evidence that the use of electronic cigarettes (e-cigarettes), or vaping, has increased in recent years among U.S. adults, with nearly 1 in 20 reporting current use of e-cigarettes, according to research presented at the American College of Cardiology's Annual Scientific Session Together with World Congress of Cardiology (ACC.20/WCC). In addition, two studies examining blood samples suggest e-cigarette exposure is roughly equivalent to tobacco smoke in terms of promoting oxidative stress that can lead to blood vessel damage and heart disease.