• Welcome to the 2020-2021 school year. In order to access all that is avaialble to you, and participate in classes, you will need to get into My Locker.

    Please follow the instructions on the videos and join me for your classes with me.

    Email me at craigtontong@antiochschools.net if you have any questions, or you need help.

    My office hours are Mondays 1-2 pm. I have put an invitation in your Teams calendar to meet with me, just press JOIN.

    Mr. Tong

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  • The researchers found that a sheet of tightly woven cotton — of 600 threads per inch — plus two sheets of chiffon, made from polyester and spandex, seemed to make the most effective combination, filtering out 80–99% of the particles, depending on their size.

    The team even suggests that the performance of this combination is comparable to that of N95 masks, which are used by healthcare professionals.

    Other combinations that perform well, according to the researchers, are tightly woven cotton plus natural silk or flannel, and cotton quilt with cotton-polyester batting.

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  • Chinese bus offers new evidence of airborne coronavirus spread: study

    coronavirus , COVID-19
    Image of the ultrastructural morphology exhibited by the 2019 Novel Coronavirus (2019-nCoV). Credit: CDC

    A person on a poorly ventilated Chinese bus infected nearly two dozen other passengers with coronavirus even though many weren't sitting close by, according to research published on Tuesday that offers fresh evidence the disease can spread in the air.

    Health authorities had initially discounted the possibility that simply breathing could send infectious micro-droplets into the air, but did a U-turn as experts piled on pressure and evidence mounted.

    The article published Tuesday in JAMA Internal Medicine probes the threat of airborne infection by taking a close look at passengers who made a 50-minute trip to a Buddhist event in the eastern Chinese city of Ningbo aboard two buses in January before  became routine against the virus.

    Researchers believe a passenger, whose gender was not identified, was likely patient zero because the person had been in contact with people from Wuhan, the city where the contagion emerged late last year.

    The scientists managed to map out where the other passengers sat, and also test them for the virus, with 23 of 68 passengers subsequently confirmed as infected on the same bus.

    What is notable is that the sickness infected people in the front and back of the bus, outside the perimeter of 1-2 meters (three-six feet) that authorities and experts say infectious droplets can travel.

    On top of that, the sick passenger was not yet showing symptoms of the disease, such as a cough, when the group made their trip to a religious event.

    Researchers also noted the air conditioning simply recirculated the air inside the bus, which likely contributed to spreading of the virus.

    "The investigations suggest that, in closed environments with air recirculation, SARS-CoV-2 is a highly transmissible pathogen," they wrote, referring to the name of the virus.

    "Our finding of potential airborne transmission has important public health significance."

    Their study, which includes a diagram showing where each infected  sat, adds to the evidence of airborne transmission, including research into how the  spread between diners' tables at a restaurant in the southern Chinese city of Guangzhou.

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  • EL students - please CLICK HERE to find out how to change languages in Blackboard. Video by Mr. Richards

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  • Welcome to 7th grade Science. Thanks for hanging in and sheltering-in-place. As we work together, we will get you the education you need, in a safe manner. Please continue to social distance, wear masks, gloves, clean your phone and credit/debit cards when you go out. Leave your shoes outside your home and wash your hands a lot.

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