Scientists develop method that may lead to more accurate, fast Covid-19 test
Scientists have used nanopores (extremely small pores) and electric current to devise a new method to identify viruses. The method will be a breakthrough in new, fast and accurate tests for the coronavirus disease (Covid-19), they claimed.
The study describing the new method has been published in the journal ACS Sensors.
The study demonstrated a new system for identifying single virus particles using an algorithm trained to detect changes in the current passing across silicon nanopores, according to news agency PTI. The team of scientists include those from Osaka University in Japan, it further reported.
The scientists used a layer of the compound silicon nitride - just 50 nanometres thick - with nanopores added, for the study. The layer was suspended on a silicon wafer and when a voltage difference was applied to the solution on either side of the wafer, ions travel through the nanopores in a process called electrophoresis.
According to the study, the motion of the ions can be monitored by the current they generate, and when a viral particle enters a nanopore, it blocks some of the ions from passing through, leading to a transient dip in current. Each dip reflects the physical properties of the particle, such as volume, surface charge, and shape, the scientists said, adding that the method can be used to identify the kind of virus.
The research team combined single-particle nanopore sensing with artificial intelligence to determine the identity of new samples and were able to achieve highly accurate identification of multiple viral species, PTI quoted senior author of the study, Makusu Tsutsui. Coronaviruses, due to their spiky outer proteins, are especially well suited for this technique, researchers said.
“This work will help with the development of a virus test kit that outperforms conventional viral inspection methods,” said Tomoji Kawai, another co-author of the study.
(with PTI inputs)
Enter your email to get our daily newsletter in your inbox
- While more than 100,000 people attended the parade during the previous years, with Covid-19 norms in place on Tuesday, the crowd was limited to 25,000.
- The Opposition, including the Congress, alleges that the government rushed the farm laws without proper discussion in Parliament. The Centre, however, says the reforms will lead to new opportunities in agriculture trade.
- The parliament canteen, now run by ITDC will offer as many as 58 items, both vegetarian and non-vegetarian, from January 27.
- Union minister for culture and tourism Prahlad Patel said government is addressing the lack of adventure sports equipment in Kargil.
- In contrast to the violence seen in the Capital, farmers held peaceful rallies across the country to protest against the farm laws.
- India put on display its war machines at a time when the country is locked in a tense border stand-off with China.
- The chaos and violence have raised questions about the future of the two-month-long agitation of farm unions.
- Bangladesh Prime Minister Sheikh Hasina, in a letter sent to her Indian counterpart, conveyed her greetings.
- Tuesday's decision to operate all trains comes a day after a meeting to resume local train services for all passengers was chaired by Maharashtra chief minister Uddhav Thackeray.
- Khattar said that unsavoury events on Tuesday deserved to be condemned in the strongest words.
- Governor RN Ravi said 'politics by gun' has stonewalled efforts to resolve the Naga political issue.
- No details were shared about the meeting, although a functionary said the party sees similarities in Tuesday’s protests with last year's anti-CAA agitation.