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Science Brief: SARS-CoV-2 and Surface (Fomite) Transmission for Indoor Community Environments

Background
SARS-CoV-2, the virus that causes COVID-19, is an enveloped virus, meaning that its genetic material is packed inside an outer layer (envelope) of proteins and lipids. The envelope contains structures (spike proteins) for attaching to human cells during infection. The envelope for SARS-CoV-2, as with other enveloped respiratory viruses, is labile and can degrade quickly upon contact with surfactants contained in cleaning agents and under environmental conditions. The risk of fomite-mediated transmission is dependent on:
The infection prevalence rate in the community
The amount of virus infected people expel (which can be substantially reduced by wearing masks)
The deposition of expelled virus particles onto surfaces (fomites), which is affected by air flow and ventilation ....

Environmental Protection Agency , List Nexternal , Covid 19 , Corona Virus , Sars Cov 2 , Data Amp Surveillance , Coronavirus Cov , Disease Information , கொரோனா வைரஸ் , பரவும் முறை , தகவல்கள் ஆம்ப் கண்காணிப்பு , நோய் தகவல் ,

China's Mars Probe Just Sent Haunting Photos of The Red Planet

China s Mars Probe Just Sent Haunting Photos of The Red Planet
6 APRIL 2021
China s Mars probe, Tianwen-1, has been hanging around Mars in a parking orbit for nearly two whole months now, preparing for its rover landing in May.
But it s not just sitting there in orbit twiddling its antennae. The probe is surveying the planet, orbiting closer, checking out the mission s chosen rover landing site - and sending back some amazing images of our dusty planetary friend.

On March 16 and March 18, the spacecraft took two panoramic photographs with its medium-resolution camera of a crescent Mars viewed from its far side, with the Sun behind it, from a distance of about 11,000 kilometers (6,835 miles). ....

Chi Wang , China National Space Administration , Solar System , Utopia Planitia , Chinese Academy , Space Science Week , Tianwen 1 , சி வாங் , சூரிய அமைப்பு , சீன கலைக்கழகம் , இடம் அறிவியல் வாரம் , செவ்வாய் கிரகம் ,

'Just a tablet'. With a new ad mocking iPad Pro, Microsoft launches another attack on Apple

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‘Just a tablet’. With a new ad mocking iPad Pro, Microsoft launches another attack on AppleET Online
Last Updated: Apr 06, 2021, 06:29 PM IST
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Ever since Apple Inc dropped its M1-powered MacBooks in the market, it s been the target of jokes by brands like Microsoft and Intel.
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Microsoft s attacks on Apple don t seem to be ending anytime soon. The tech firm, which has been taking shots at Apple through its campaign Still a Better Choice , has done it again. ....

Apple Inc , Better Choice , Surface Pro , Pad Pro , Magic Keyboard , Surface Pro 7 , ஆப்பிள் இன்க் , சிறந்தது தேர்வு , மேற்பரப்பு ப்ரொ , பட் ப்ரொ , மந்திரம் விசைப்பலகை ,

Nasa's mini-chopper dropped on Mars' surface

World
April 5, 2021
WASHINGTON: Nasa’s Ingenuity mini-helicopter has been dropped on the surface of Mars in preparation for its first flight, the US space agency said.
The ultra-light aircraft had been fixed to the belly of the Perseverance rover, which touched down on the Red Planet on February 18.
“MarsHelicopter touchdown confirmed!” Nasa’s Jet Propulsion Laboratory tweeted Saturday. “Its 293 million mile (471 million kilometer) journey aboard @NasaPersevere ended with the final drop of 4 inches (10 centimeter) from the rover’s belly to the surface of Mars today. Next milestone? Survive the night.”
A photograph accompanying the tweet showed Perseverance had driven clear of the helicopter and its “airfield” after dropping to the surface. ....

United States , Bob Balaram , Propulsion Laboratory , Nasa Jet Propulsion Laboratory , Red Planet , Jet Propulsion Laboratory , Mars Helicopter Project , ஒன்றுபட்டது மாநிலங்களில் , பாப் பலராம் , ப்ரொபல்ஶந் ஆய்வகம் , நாசா ஜெட் ப்ரொபல்ஶந் ஆய்வகம் , சிவப்பு கிரகம் , ஜெட் ப்ரொபல்ஶந் ஆய்வகம் , செவ்வாய் கிரகம் ஹெலிகாப்டர் ப்ராஜெக்ட் , செவ்வாய் கிரகம் ,

Welcome To IANS Live - SCIENCE - NASA's Ingenuity helicopter touches down on Red Planet

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IANSLive
Washington, April 4 (IANS) NASA s Mars helicopter Ingenuity has been dropped on the surface of the Red Planet ahead of its historic first flight scheduled for April 11.
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Update: 04-April-2021 ....

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