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There was another study from 2011 showing the use of steam bags in microwaves, but localized extreme temperatures might destroy microfiber structures like putti
by anonsubmit2671 7y ago
There was another study from 2011 showing the use of steam bags in microwaves, but localized extreme temperatures might destroy microfiber structures like putting microfiber cloths in a clothes dryer.
In a conventional oven, 75 ℃ / 167 ℉ for 30 minutes is sufficient to inactivate SARS-CoV-2. If someone were worried about packages, mail or objects being contaminated, placing them into the oven like this would probably work if allowed to reach that temp internally for that time.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3078131/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3078131/
- saagarjha 7y agoTIL U+2103 DEGREE CELSIUS and U+2109 DEGREE FAHRENHEIT.
- dionian 7y agoif you're on a Mac, you can use alt-0 for a degrees symbol too
- saagarjha 7y agoThat's actually U+00BA MASCULINE ORDINAL INDICATOR. You want U+00B0 DEGREE SIGN, which is ⌥⇧8.
- doctorhandshake 7y agoUpvoted as one of the most HN comments I’ve ever seen.
- divbzero 7y agoI’m generally amused that a top thread for an N95 sterilization post is a Unicode discussion.
- malandrew 7y agoWhat’s the feminine ordinal indicator. I thought it was a degree sign because as a Portuguese speaker I’ve never noticed the feminine ordinal indicator as an easily accessible option. Are both easily accessible on the iOS keyboard?
- saagarjha 7y agoU+00AA FEMININE ORDINAL INDICATOR is ª, accessible via ⌥9 on macOS.
- lone_haxx0r 7y agoI just realized I have used the ordinal symbol many times when I should have used the degree sign. Why didn't someone tell me? Oh, I've been making an idiot out of myself.
- hanche 7y agoThat depends on the keyboard layout. On the Norwegian keyboard for example, ⌥⇧Q produces the degree symbol, whereas ⌥⇧8 produces U+007B LEFT CURLY BRACKET.
- brian_cunnie 7y agoYou totally blew my mind—I've been using the wrong one for years. Henceforth, ⌥⇧8. Thank you.
- basilgohar 7y agoIt took me a few passes to realize you were not just being comically excited and typing in all caps, but rather, everything you typed is rather pedantically and accurately capitalized.
- saagarjha 7y agoI just copied the DuckDuckGo Unicode Instant Answer (https://duck.co/ia/view/unicode https://duck.co/ia/view/unicode) ;)
- bentcorner 7y agoOn Windows ALT+248 (on keypad) makes a degree symbol: ° IMO it looks better than the single glyph. (°C °F vs ℃ ℉)
- saagarjha 7y agoUnicode agrees: > Several letterlike symbols are used to indicate units. In most cases, however, such as for SI units (Système International), the use of regular letters or other symbols is preferred. > In normal use, it is better to represent degrees Celsius “°C” with a sequence of U+00B0 degree sign + U+0043 latin capital letter c, rather than U+2103 degree celsius. For searching, treat these two sequences as identical. Similarly, the sequence U+00B0 degree sign + U+0046 latin capital letter f is preferred over U+2109 degree fahrenheit, and those two sequences should be treated as identical for searching. (From https://www.unicode.org/versions/Unicode13.0.0/ch22.pdf https://www.unicode.org/versions/Unicode13.0.0/ch22.pdf)
- lone_haxx0r 7y agoThe why include the symbols in the first place? Just in case?
- rkagerer 7y agoSo we can make search that tiny bit more complicated.
- bmn__ 7y agoFor lossless round-tripping with legacy character sets. This is one explicit design goal of Unicode.
- yorwba 7y agoIt's most likely for round-trip compatibility with another encoding. There are many Unicode codepoints that simply represent combinations of other codepoints. If you don't care about round-tripping, just normalize everything to NFKC or NFKD (the difference being that accented letters like á are one codepoint in NFKC and two codepoints for the base letter and combining mark in NFKD).
- anonsubmit2671 7y agoDoes that not appear correctly on your device? Which would that be?
- saagarjha 7y agoNo, it does (a bit squashed, but it's perfectly readable). I didn't know there was as specific Unicode character for those.
- lultimouomo 7y agoAs a rule you can just assume there is, no matter the situation.
- 60654 7y agoMore recently: a 2017 mask decontamination study from Taiwan that compared a number of commonly-available solutions, using several mask types including N95: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5638397/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5638397/ Surprisingly, the method that worked best was... > "Place the test masks in a traditional electric rice cooker using dry heat for 3 minutes (149~164°C, without adding water)." Apparently dry heat was much better at preserving the structural integrity of the different masks, compared to chemicals or steam.
- j88439h84 7y ago> traditional electric rice cooker
- MikeAmelung 7y agohttps://qz.com/quartzy/1217661/instant-pots-exponential-growth-in-one-chart/ https://qz.com/quartzy/1217661/instant-pots-exponential-grow...
- lozenge 7y agoProbably meaning one without a microcomputer. https://www.youtube.com/watch?v=RSTNhvDGbYI https://www.youtube.com/watch?v=RSTNhvDGbYI
- vasco 7y agoI would suspect if the general population was told to do this we'd have more disruptions due to house fires than from the increased risk of unboxing packages outside of the door, discarding them and then washing your hands and clothes.
- hnarn 7y agoWhat catches fire at 75 Celsius?
- vidarh 7y agoThe problem is the assumption that people will consistently manage to ensure it only reaches 75 degrees.
- ryanhuff 7y agoI don't think my oven can go lower than 200F.
- jbj 7y agoIf your oven is not accurate near 75 C. maybe you can use one of the other methods, from the pdf it looks like water steam could do the same job.
- buckminster 7y agoIf you have a thermometer you can turn the oven off manually as it approaches your target temperature. I do this for warming bread dough. Once you know how long it takes you don't need the thermometer.
- div_rana 7y agoDo we need the steam bags to pack the n95 respirators? Or is it okay to just put inside the oven.
- brianstorms 7y agoI'm confused by all the disclaimers regarding home ovens. WHY NOT a home oven, what is the scientific reason? I've been baking N95s on a tray in our kitchen oven at 170F for ~20-30 min and reusing. These articles seem to suggest that's a bad idea but do not say WHY. Would love to know WHY.
- cjbprime 7y agoPerhaps just because of the step where you bring the contaminated N95 into your home kitchen and handle it there, before it enters the oven? This sounds tricky to get right.