feed info

27 articles from ScienceDaily

Blood plasma protein fibrinogen interacts directly with nerve cells to cause brain inflammation

Before soluble fibrinogen, a blood plasma protein, is converted into insoluble fibrin molecules that can toxically accumulate outside blood vessels in the brain, fibrinogen connects directly with neurons and can cause a damaging inflammatory reaction, a research team reports. Their discovery may help identify new therapeutic targets for neurodegenerative diseases such as Alzheimer's disease and...

Diet restricted size of hunter-gatherer societies

Short growing seasons limited the possible size of hunter-gatherer societies by forcing people to rely on meat, according to a recent study. After looking at population size for the roughly 300 hunter-gatherer societies which existed until quite recently, the researchers found that many of these groups were much smaller than might have been expected from the local ecosystem productivity. In...

Why nitrous oxide emissions should factor into climate change mitigation

A newly published study found that a range of agricultural soils produce nitrous oxide emissions in sufficient quantities to contribute to climate change. The researchers compared soils with various moisture content and found agricultural soils are capable of high nitrous oxide emissions across a wide range of environmental conditions.

Warming temperatures increasingly alter structure of atmosphere

Climate change is having an increasing impact on the structure of Earth's atmosphere, a new international study shows. The research draws on decades of observations to quantify that warming temperatures are playing a greater role in pushing up the top of the lowest level of the atmosphere by about 50-60 meters per decade.

Stem cells do not (only) play dice

In just a few weeks a completely new organism develops from a fertilized egg cell. The real miracle is that a bunch of identical stem cells turns into completely different, specialized cell types. A team has now been able to show that the specialization of individual cells during embryonic development is not, as previously assumed, exclusively left to chance but is rather determined by cell...

Air pollution disproportionally affects people of color, lower-income residents in DC

The rates of death and health burdens associated with air pollution are borne unequally and inequitably by people of color and those with lower household income and educational attainment in Washington, D.C., according to a new study. The study found that while deaths and health burdens associated with PM2.5 halved between 2000 and 2018 in the D.C. area, disparities and geographical segregations...

Storing energy in plants with electronic roots

By watering bean plants (Phaseolus vulgaris) with a solution that contains conjugated oligomers, researchers at the Laboratory of Organic Electronics, Linköping University, Sweden, have shown that the roots of the plant become electrically conducting and can store energy.

Sitting more linked to increased feelings of depression, anxiety

During the initial COVID-19 outbreak in March 2020, a lot of people suddenly became more sedentary as they adhered to stay-at-home orders or opted to self-isolate. Recently published research found people who continued to spend a higher amount of time sitting in the weeks following were likely to have higher symptoms of depression. A closer investigation into this association could play a role in...

Converting methane to methanol -- with and without water

Chemists have been searching for efficient catalysts to convert methane into methanol. Adding water to the reaction can address certain challenges, but it also complicates the process. Now a team has identified a new approach using a common industrial catalyst that can complete the conversion effectively both with and without water. The findings suggest strategies for improving catalysts for the...

Thinnest X-ray detector ever created

Researchers have created the world's thinnest X-ray detector using tin mono-sulfide (SnS) nanosheets. Highly sensitive and with a rapid response time, the new X-ray detector is less than 10 nanometers thick and could one day lead to real-time imaging of cellular biology.

Galectin-1 linked to increased risk of type 2 diabetes

Researchers now associate elevated levels of the protein galectin-1 with increased risk of developing type 2 diabetes about 18 years later. At the same time, this protein seems to be a protective factor for the kidneys among type 2 diabetes patients at high risk for diabetic nephropathy.

Healing skin ischemia-reperfusion injuries with interleukin-36 receptor antagonists

Skin wounds from ischemia-reperfusion injuries -- tissue damage caused by blood returning to tissues after a period of oxygen deprivation -- may not heal appropriately in some patients, owing to elusive underlying immunological mechanisms. Scientists from Japan have now succeeded in proposing a means to solve this medical conundrum by understanding the role of interleukin-36 receptor antagonists...

High cell membrane tension constrains the spread of cancer

The membranes of cancer cells are more pliant than the membranes of normal cells. A research collaboration has discovered that cancer invasion and migration can be supressed in mice by manipulating the stiffness of the cell membrane. Hopefully this will contribute towards the development of new treatments that target the physical characteristics of cancer cells.