Initially, components were extracted with a single-phase solvent mixture, followed by separating hydrophobic target components from polar impurities via phase separation. We employed the ...

ethyl acetate, ethyl lactate, and ethyl butyrate—accounting for approximately 90% of the total esters (Xu Y. Q. et al., 2022). Ethyl acetate, with a threshold of 32,600 μg/L, is one of the typical ...

The system, known as a polar vortex, is forecast to bring subzero temperatures to the Midwest, Mid-Atlantic and deep into the South. And it looks as if we may get more arctic blasts in the coming ...

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is ...

Researchers at Leipzig University have developed a new process for reversing the polarity of chemical compounds, also known as umpolung, for the precise synthesis of pharmaceuticals. "This ...

Victoria has been at the Highland Wildlife Park since 2015 Victoria is the oldest of four polar bears kept at the Highland Wildlife Park in the Cairngorms National Park. At the grand old age of 28 ...

Victoria is the oldest of four polar bears kept at the Highland Wildlife Park in the Cairngorms National Park. At the grand old age of 28 her keepers say she has reached the stage in her life when ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not ...

A polar vortex will plunge the GTA into a deep freeze until Wednesday, Environment Canada says. "Be prepared for very cold conditions. Temperatures may be colder than those that have been seen the ...

Jasmine Laws is a Live News Reporter at Newsweek based in London, U.K. Her focus is reporting on U.S. politics, crime and global affairs. Jasmine joined Newsweek in 2024 from News UK and had ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen ...