Coronaviruses Spike proteins SARS-CoV-2 RBD Mutations 1. Introduction SARS-CoV-2 belongs to the Coronavirus family, consisting of positive-sense, single-stranded RNA viruses that are lipid-enveloped [1]. In December 2019, SARS-CoV-2 infected its first patient, starting what would be a new pa...
Then, in April, a man, who asked to remain anonymous, wanted to send money to cover a few months of rent — to give us some breathing room to get back on our feet. Maybe worn down by the ongoing direness of the situation, I replied. "I want to say no," I wrote back. "Wha...
the absence of moas(恐鸟) from New Zealand and the long list of endangered megafauna(巨型动物). But SARS-CoV-2 shows how people can also end up as prey. Viruses have caused a litany of modern pandemics, from covid-19, to HIV/AIDS to the influenza outbreak in ...
The Russians and the Chinese certainly possess the capabilities of fielding high-power microwave sources like the ones that appear to have been used in Cuba and China. The truth of what actually happened to U.S. personnel in Cuba and China – and why – might remain a mystery...
TheIRS has extended its tax payment due date by 90 days, said the treasury secretary. People are still encouraged to file on time by April 15, but you can delay payments if you owe money to the IRS, with interest and penalties being waived. ...
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Additionally, circular economy evaluation at micro level is actually based on cleaner production and green consumption what is not full circular economy approach [19]. Indicators that claim to be circular economy indicators at micro level do not encompass the whole complexity of circular economy and ...