Author archives: César Tomé

19 elements to have atomic weights adjusted Aluminum, cadmium, gold and arsenic are among 19 elements that are having their atomic weights adjusted by the International Union of Pure and Applied Chemistry. More precise measurements are now available leading to the new weight calculations, which happens rarely. The atomic weight of nonmetal selenium hasn’t been […]

PET helps ID tau protein in the brain PET shows promise in detecting tau protein accumulation in the brain, according to a study in the journal Neuron. Researchers developed a chemical that binds with the substance and used PET to identify areas of the brain at risk of neuronal death. The approach was evaluated in […]

Reprogrammed stem cells in mice could pave way to tissue regeneration Spanish scientists successfully forced mature cells into an embryonic-like state inside the bodies of living mice, creating so-called reprogrammed induced pluripotent stem cells. Transforming mature cells into stem-like cells “means turning back the clock when everything in the environment favors the opposite,” lead author […]

Hypersonic flight to undergo further study The U.S. Air Force and the Defense Advanced Research Project Agency are joining forces to study the capabilities of hypersonic flight. The project will build on the Air Force’s X-51A Waverider program, which ended in May when the unmanned craft reached a top speed of Mach 5.1 riding on […]

Long canyon lies beneath Greenland Ice Sheet A canyon nearly twice as long as the Grand Canyon has been found under the massive Greenland Ice Sheet. By studying data compiled over three decades, Jonathan Bamber of the University of Bristol in the U.K. and his team discovered details about the canyon, which is at least […]

BMI may not be accurate predictor of fitness, study suggests Metabolism and body mass index do not go hand-in-hand, according to a study published in the journal Science. According to the study, it is possible to have a normal-range BMI while also having an abnormal metabolism, indicating that it’s not prudent to rely on BMI […]

Current safe sugar levels may not be so safe Female mice fed a diet with 25% added sugars died at twice the normal rate, while males were less likely to reproduce. That amount of sugar is considered a safe level for human consumption. “Added sugar consumed at concentrations currently considered safe exerts dramatic impacts on […]

Herbal remedy has cancerous side effect Aristolochia plants, which have been used in China for herbal remedies, have been found to cause cancer, according to two studies published in Science Translational Medicine. The plants contain a naturally carcinogenic compound called aristolochic acid, which causes more cell mutations than those caused by tobacco smoke and UV […]

Varied smelling ability linked to genes Scientists at the New Zealand Institute for Plant and Food Research sequenced test subjects’ genomes to see if they could predict an individual’s smelling ability, and found clusters of genes that reliably predicted the person’s ability to smell four of 10 chemicals. “All of these genes are on different […]

Methane released from Arctic permafrost could cost trillions worldwide Scientists warn that large amounts of methane that could be released from the melting Arctic permafrost could have a huge global economic impact. The release of 50-gigatonnes of methane over 10 years could cost $60 trillion worldwide, according to a study published in the journal Nature […]