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While the device used comes with six different size channels — 0.3, 0.5, 1.0, 2.0, 5.0, and 10.0 microns ( 1 micron is a millionth part of a metre) — a lot of the dust is so fine that aerosols in that range cannot really be measured. More than 98% of the dust, in fact, is contained in the first two channels (smallest particles) of size 0.3 and 0.5 microns. The study did not consider particles in these channels for the aerosol assessment. “But there’s a reasonable sized range where you can detect the aerosols,” Bonn said. For validation, the researchers compared their measurements wi...

in Antarctica, the pandemic has reached every continent. And a mutant virus has emerged in the United Kingdom, which threatens to shut down the world yet again — a world just beginning to recover from lockdowns and movement restrictions. The mutation of viruses The genetic material or genome of SARS-CoV-2 is a ribonucleic acid (RNA) made up of over 30,000 units (called nucleotides). Among the families of RNA viruses, the coronaviruses have the largest genome. Most other RNA viruses have on average about 10,000 nucleotides. When genomes replicate — any genomes, whether DNA or RNA, from th...

Explained: Why many heard of Eswatini for the first time in a PM Modi tweet © Provided by The Indian Express When Prime Minister Narendra Modi offered a condolence message following the death of Eswatini's Prime Minister Ambrose Mandvulo Dlamini, who had tested positive for Covid-19 four weeks ago, the name of the country came as news for some Indian social media users. Although officially renamed Eswatini in 2018, the landlocked country in southern Africa, is more well-known in India by its former name Swaziland. https://twitter.com/moronhumor/status/1338869203873521665?s=21 Why did Swazil...

Explained: India’s caution as US sanctions Turkey over the S-400 deal © Provided by The Indian Express The United States has imposed sanctions on Turkey on Monday over Ankara’s acquisition of Russian S-400 air defence systems. Ankara acquired the Russian S-400 ground-to-air defenses in mid-2019 and says they pose no threat to NATO allies. Washington has long been threatening sanctions on Turkey and had removed the country from an F-35 jet program last year. With India set to get the consignment of the S-400 air defence system early next year, New Delhi is watching Washington’s moves c...

Explained: Why are Punjab arhtiyas under the I-T dept scanner? There have been I-T raids on the premises of the seven arhtiyas, including the district presidents of arhtiya associations and the president of state level-association of commission agents. Written by Anju Agnihotri Chaba , Edited by Explained Desk | Chandigarh | Updated: December 23, 2020 12:17:47 pm Arhityas and labourers protest against the I-T raids, at Sunam mandi on Monday. (Express Photo) For the past one week the arhtiyas of Punjab have been receiving summons and not...