Must have been wearing a traditional Scottish outfit :-) Jürgen
> On May 6, 2020, at 11:19 AM, Tristan Croll <ti...@cam.ac.uk> wrote: > > You got off lucky. An old friend of mine learned this lesson when on a > particularly sunny day he spent an hour out on a New Zealand glacier in > shorts with no underwear... > > On 2020-05-06 16:17, James Holton wrote: >> I feel I should correct you on one thing Tim: UV _can_ go around >> corners because it scatters. I learned this the hard way as a younger >> man after a fine day of skiing. I had put sunscreen everywhere except >> the bottom of my nose. >> You are right, however, that the intensity after scattering is quite a >> bit less than tha main illumination. This is true for all kinds of >> light. >> -James Holton >> MAD Scientist >> On 5/5/2020 11:59 PM, Tim Gruene wrote: >>> Hi James, >>> for us, the suggestions of cling film / plastic wrap or just swapping >>> keyboards and mice per person is the simplest - thanks to everyone for >>> the many suggestions. Especially the latter, since only two people will >>> operate the instruments. >>> UV light does not go around corners. It might be useful for fume hoods, >>> but for most places, door handles and other curved surfaces are >>> probably much more the infecting parts, while they escape the UV light. >>> And vira are transported in water droplets, which are larger than 1um. >>> Best, >>> Tim >>> On Tue, 5 May 2020 17:19:56 -0700 >>> James Holton <jmhol...@lbl.gov> wrote: >>>> All joking aside, there has been a furor of attention on UV-based >>>> disinfection of late. Some of it is not entirely crazy. I.E. >>>> Columbia University’s Center for Radiological Research has put >>>> forward the idea of illuminating occupied public areas with >>>> ultra-narrow-band UV-C (222 nm). >>>> https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552051/ >>>> Mind you, UV-C normally covers 100 - 280 nm, and the PPE requirements >>>> for that (at LBNL at least) are extensive: polycarbonate safety >>>> glasses and face shield with a mark U6 (UV protection), long-sleeved >>>> clothing, and gloves. Basically: do not expose skin! >>>> The idea behind using monochromatic 222 nm radiation is that it is at >>>> the edge of a very steep increase in the absorption of water, >>>> protein, and other biologicals. Penetration depths are hard to >>>> estimate because of the steep slope, but they are on the order of 1 >>>> micron. So, smaller than a typical mamalian cell, but bigger than a >>>> bacterium or virus. The paper above did not have any human subjects, >>>> nor did it discuss how to deal with all the ozone, but the results >>>> are intruiging. Needs further study. >>>> Personally, I think this would probably fog your corneas and perhaps >>>> burn the thin skin on lips and other exposed mucosa. Hair I'd expect >>>> to embrittle and fall apart eventually. Yes, hair is 40 microns thick >>>> and the penetration depth is 1 micron, but photon's don't "stop" at >>>> the penetration depth. 36% of them go deeper. Plastic in keyboards >>>> too would probably bleach and flake with prolonged exposure. Ever >>>> seen a keyboard left out in the sun for a few weeks? I'd worry a bit >>>> about this micro-damage creating crevices where bugs could hide. >>>> I encourage you to bring this up with your Health and Safety people, >>>> but make sure they are sitting down first. >>>> -James Holton >>>> MAD Scientist >>>> On 4/29/2020 12:41 PM, Andrea Thorn wrote: >>>>> Hi Tim! >>>>> 100% alcohol is less effective than 80%, and in order to completely >>>>> be sure, the keyboard needs not only to be wiped. One can buy >>>>> keyboards that can be disinfected because they are waterproof, such >>>>> as the Cherry JK-1068DE-2 for about 50 €. >>>>> We clean the keyboards in our lab occasionally anyway, and have >>>>> used 70% alcohol on them without problem. Disinfectant wipes, a >>>>> detergent cleaner (such as Viss Glass & Flächen) and cotton swabs >>>>> also offer some help. We wipe our mobile phones with a disinfectant >>>>> wipe after washing our hands when arriving home/at work. >>>>> I would also be really interested in what could be done with a UV >>>>> light, if someone knows? >>>>> If the computer is used by one person during the shift, individual >>>>> keyboards for each person could be a solution. If people sit down, >>>>> the desk surface, which may be touched, should likely also be wiped >>>>> at the beginning and end of the shift I would say. >>>>> Stay save and best wishes, >>>>> Andrea. >>>>> Am 29/04/2020 um 21:04 schrieb Diana Tomchick: >>>>>> 100% ethanol or isopropanol work really well on the microscopes, >>>>>> I soak a Kimwipe and then clean the eyepieces and the knobs for >>>>>> changing magnification and focus, as well as the door handles, >>>>>> bench tops, etc. >>>>>> Diana >>>>>> ************************************************** >>>>>> Diana R. Tomchick >>>>>> Professor >>>>>> Departments of Biophysics and Biochemistry >>>>>> UT Southwestern Medical Center >>>>>> 5323 Harry Hines Blvd. >>>>>> Rm. ND10.214A >>>>>> Dallas, TX 75390-8816 >>>>>> diana.tomch...@utsouthwestern.edu >>>>>> (214) 645-6383 (phone) >>>>>> (214) 645-6353 (fax) >>>>>> ------------------------------------------------------------------------ >>>>>> *From:* CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> on behalf of >>>>>> Diana Tomchick <diana.tomch...@utsouthwestern.edu> >>>>>> *Sent:* Wednesday, April 29, 2020 2:00 PM >>>>>> *To:* CCP4BB@JISCMAIL.AC.UK >>>>>> *Subject:* Re: [ccp4bb] disinfecting keyboards >>>>>> EXTERNAL MAIL >>>>>> You could try doing what my technician does with her keyboard; >>>>>> she wraps it in a clear, thin food wrap that can be taped to the >>>>>> back of the keyboard. This is usually done to keep food and other >>>>>> things (liquids) from damaging the keyboard, but you could simply >>>>>> replace the wrap every time someone else uses it. >>>>>> Personally I like using a Kimwipe soaked with 100% isopropanol, >>>>>> I've never yet encountered a keyboard that suffered from having >>>>>> the writing removed with that or 100% ethanol. Both work and as >>>>>> long as they are 100% (no water), the keyboard and mouse have no >>>>>> issues. >>>>>> Diana >>>>>> ************************************************** >>>>>> Diana R. Tomchick >>>>>> Professor >>>>>> Departments of Biophysics and Biochemistry >>>>>> UT Southwestern Medical Center >>>>>> 5323 Harry Hines Blvd. >>>>>> Rm. ND10.214A >>>>>> Dallas, TX 75390-8816 >>>>>> diana.tomch...@utsouthwestern.edu >>>>>> (214) 645-6383 (phone) >>>>>> (214) 645-6353 (fax) >>>>>> ------------------------------------------------------------------------ >>>>>> *From:* CCP4 bulletin board <CCP4BB@JISCMAIL.AC.UK> on behalf of >>>>>> Tim Gruene <tim.gru...@univie.ac.at> >>>>>> *Sent:* Wednesday, April 29, 2020 1:53 PM >>>>>> *To:* CCP4BB@JISCMAIL.AC.UK >>>>>> *Subject:* [ccp4bb] disinfecting keyboards >>>>>> Dear all, >>>>>> can you make suggestions for how to disinfect computer keyboards, >>>>>> and instrument panels? >>>>>> Our facility is going to reboot next week, with shifts so that >>>>>> people don't meet. The main interface will be the computer >>>>>> keyboards, as well as the door of our X-ray diffractometer and the >>>>>> mounting of the crystals. >>>>>> The keyboard labels may not like alcohols (and the efficiency of >>>>>> injecting disinfecting through the USB cable is also under >>>>>> discussion, so I heard). >>>>>> One way would be to use individual keyboards, and wearing gloves >>>>>> for replugging, and to use gloves for mounting crystals. >>>>>> But maybe there are other ways that won't require gloves? >>>>>> Best regards, >>>>>> Tim >>>>>> -- -- >>>>>> Tim Gruene >>>>>> Head of the Centre for X-ray Structure Analysis >>>>>> Faculty of Chemistry >>>>>> University of Vienna >>>>>> Phone: +43-1-4277-70202 >>>>>> GPG Key ID = A46BEE1A >>>>>> ######################################################################## >>>>>> To unsubscribe from the CCP4BB list, click the following link: >>>>>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >>>>>> ------------------------------------------------------------------------ >>>>>> UTSouthwestern >>>>>> Medical Center >>>>>> The future of medicine, today. >>>>>> ------------------------------------------------------------------------ >>>>>> To unsubscribe from the CCP4BB list, click the following link: >>>>>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >>>>>> CAUTION: This email originated from outside UTSW. Please be >>>>>> cautious of links or attachments, and validate the sender's email >>>>>> address before replying. >>>>>> ------------------------------------------------------------------------ >>>>>> To unsubscribe from the CCP4BB list, click the following link: >>>>>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >>>>> -- >>>>> Dr. Andrea Thorn | group leader >>>>> andrea.th...@uni-wuerzburg.de >>>>> +49 931 31-83677 >>>>> Rudolf Virchow Center, University of Wuerzburg >>>>> Josef-Schneider-Str. 2 | 97080 Wuerzburg | Germany >>>>> https://www.uni-wuerzburg.de/en/rvz/research/associated-research-groups/thorn-group/ >>>>> ------------------------------------------------------------------------ >>>>> To unsubscribe from the CCP4BB list, click the following link: >>>>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >>>> ######################################################################## >>>> To unsubscribe from the CCP4BB list, click the following link: >>>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 >> ######################################################################## >> To unsubscribe from the CCP4BB list, click the following link: >> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 > > ######################################################################## > > To unsubscribe from the CCP4BB list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1 ######################################################################## To unsubscribe from the CCP4BB list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=CCP4BB&A=1
