183 articles from THURSDAY 19.1.2023

Why a Startup’s Controversial Experiments to Cool the Earth Are on Pause

Make Sunsets, a company behind a recent controversial effort to cool the earth by releasing particles of sulfur dioxide (SO2) into the upper atmosphere to reflect incoming heat, is canceling its upcoming experiments in Mexico, following a rebuke from the Mexican government. “We have decided not to do launches in Mexico until we come up with a way to collaborate with the Mexican...

China's population is now inexorably shrinking

China's National Bureau of Statistics has confirmed what researchers such as myself have long suspected—that 2022 was the year China's population turned down, the first time that has happened since the great famine brought on by Chinese leader Mao Zedong in 1959-1961.

Tomato analyzer software reveals phenotypic diversity in New Mexican chile peppers

New Mexico is one of the largest producers of chile pepper (Capsicum spp.) in the United States, with 51,000 tons of production in 2021 from an area of 8500 acres with average productivity of 6 tons/acres according to the U.S. Department of Agriculture National Agriculture Statistics Service. The average productivity decreased by 25% as the area planted to chile pepper production remained the...

How habanero peppers respond to stress

Like people, plants have to cope with stress. The impact on humans is well catalogued, but less is known about how stressors—including high salinity and lack of nutrients—affect plants such as habaneros. Now, researchers report in ACS Agricultural Science & Technology that these conditions change the levels of natural compounds in the peppers. The results could have ramifications for growing...

New nanoparticles deliver therapy throughout the brain and edit Alzheimer's gene in mice

Gene therapies have the potential to treat neurological disorders like Alzheimer's and Parkinson's diseases, but they face a common barrier—the blood-brain barrier. Now, researchers at the University of Wisconsin-Madison have developed a way to move therapies across the brain's protective membrane to deliver brain-wide therapy with a range of biological medications and treatments.

Nearly 50-meter laser experiment sets record in university hallway

It's not at every university that laser pulses powerful enough to burn paper and skin are sent blazing down a hallway. But that's what happened in UMD's Energy Research Facility, an unremarkable looking building on the northeast corner of campus. If you visit the utilitarian white and gray hall now, it seems like any other university hall—as long as you don't peak behind a cork board and spot...

Using cancer cells as logic gates to determine what makes them move

Cancer cells migrate through the body for multiple reasons; some are simply following the flow of a fluid, while others are actively following specific chemical trails. So how do you determine which cells are moving and why? Purdue University researchers have reverse-engineered a cellular signal processing system and used it like a logic gate—a simple computer—to better understand what causes...

Study reveals key aspect of the finely tuned regulation of gene expression

Your skin cells are clearly different from your brain cells even though they both develop in the same person and carry the same genes. They are different because each cell type expresses a particular set of genes that is different from the ones expressed by the other. This is possible thanks to cellular mechanisms that tightly regulate gene expression.

New treatment strategy cuts risk of bowel cancer returning by 28%

UK trial across three countries finds that giving patients chemotherapy before surgery was more effectiveGiving bowel cancer patients chemotherapy before surgery cuts the risk of it coming back by 28%, according to the results of a trial experts are hailing as “fantastic”.As many as one in three patients diagnosed with the disease see it return after surgery, a figure described as “far too...

Rare opportunity to study short-lived volcanic island reveals sulfur-metabolizing microbes

In 2015, a submarine volcano in the South Pacific erupted, forming the Hunga Tonga Hunga Ha'apai island, destined to a short, seven-year life. A research team led by the University of Colorado Boulder and Cooperative Institute for Research in Environmental Sciences (CIRES) jumped on the rare opportunity to study the early microbial colonizers of a newly formed landmass and to their surprise, the...

Summer heat waves and low oxygen prove deadly for bay scallops as a New York fishery collapses

A new study by Stony Brook University researchers published in Global Change Biology demonstrates that warming waters and heat waves have contributed to the loss of an economically and culturally important fishery, the production of bay scallops. As climate change intensifies, heat waves are becoming more and more common across the globe. In the face of such repeated events, animals will...

Researchers create 2D quantum light source from layered materials

Recent advances in spontaneous parametric down-conversion (SPDC)-based quantum light sources based on two-dimensional layered materials have been made by a team led by Prof. Ren Xifeng from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, collaborating with Prof. Qiu Chengwei and Dr. Guo Qiangbing from the National University of Singapore (NUS). The...

Light pollution is drowning the starry night sky faster than thought

The star pattern Western astronomers call Orion has long drawn our eyes to the night skies. Some Ki’che’ Maya people see it as a cosmic hearth. For the Khoisan people of southern Africa, it’s an archer confronting zebras and a lion. Meanwhile the Carib people of South America see a one-legged hunter named Epietembo. But future generations might wonder what all the...