UV-LED teeb puas tuaj yeem tua tus kabmob tshiab?
Kev tua kab mob ntawm cov kab mob tseem yog ib qho tseem ceeb rau kev noj qab haus huv rau pej xeem kom txo qis kev sib kis ntawm ntau yam kab mob sib kis, tshwj xeeb tshaj yog thaum lub sij hawm COVID-19 muaj thoob qhov txhia chaw. Tsis tas li ntawd, cov kws tshawb fawb tseem tab tom txhim kho cov txheej txheem tshuaj tua kab mob kom zoo dua qub, tshwj xeeb tshaj yog rau cov chaw pej xeem coob. Cov kws tshawb fawb ntawm University of Toronto's Scarborough lub tsev kawm ntawv tau pom qhov ua tau zoo thiab muaj peev xwm ntawm UV teeb-emitting diodes raws li kev ua kom huv los ntawm kev ua kom tsis txhob muaj ob hom kab mob sib txawv: tib neeg tus mob coronavirus 229E thiab tib neeg kev tiv thaiv kab mob (HIV). Hloov ntawm lub teeb dawb thiab cov tshuaj tua kab mob ultraviolet (UV) lub teeb.
Kev tua kab mob ntawm cov kab mob tseem yog ib qho tseem ceeb rau kev noj qab haus huv rau pej xeem kom txo qis kev sib kis ntawm ntau yam kab mob sib kis, tshwj xeeb tshaj yog thaum lub sij hawm COVID-19 muaj thoob qhov txhia chaw. Tsis tas li ntawd, cov kws tshawb fawb tseem tab tom txhim kho cov txheej txheem tshuaj tua kab mob kom zoo dua qub, tshwj xeeb tshaj yog rau cov chaw pej xeem coob.
Lub teeb ultraviolet (UV) yav dhau los tau raug txheeb xyuas tias yog ib txoj hauv kev siv tshuaj tua kab mob thiab tau pom tias muaj txiaj ntsig zoo hauv kev ua kom muaj ntau yam kab mob. Lub advent ntawm UV lub teeb-emitting diodes muaj qhov zoo ntawm kev yooj yim ntawm cov tshuaj tua kab mob, raws li germicidal UV teeb tuaj yeem muab siv tib lub teeb pom kev zoo uas muab cov qauv dawb teeb pom kev hauv chav.
Cov kws tshawb fawb ntawm University of Toronto's Scarborough lub tsev kawm ntawv tau pom qhov ua tau zoo thiab muaj peev xwm ntawm UV teeb-emitting diodes raws li kev ua kom huv los ntawm kev ua kom tsis txhob muaj ob hom kab mob sib txawv: tib neeg tus mob coronavirus 229E thiab tib neeg kev tiv thaiv kab mob (HIV). Hloov ntawm lub teeb dawb thiab cov tshuaj tua kab mob ultraviolet (UV) lub teeb. Nrog pheej yig retrofits, lawv kuj siv tau nyob rau hauv ntau yam qauv teeb pom kev zoo fixtures, coj ib tug "kev thov tshwj xeeb" rau pej xeem chaw, hais tias Christina Guzzo, tus kws sau ntawv laus ntawm txoj kev tshawb no.
Guzzo, tus kws tshaj lij ntawm lub tsev kawm ntawv Department of Biological Sciences tau hais tias "Peb tab tom nyob rau lub sijhawm tseem ceeb uas peb yuav tsum siv txhua qhov tuaj yeem nres kom peb tawm ntawm tus kabmob kis no," "Txhua lub tswv yim txo qis uas tuaj yeem ua tau yooj yim yuav tsum tau siv."
UV teeb tua kab mob los ntawm hluav taws xob. Nrog rau cov kws kho mob cov tub ntxhais kawm Arvin T. Persaud thiab Jonathan Burnie, Guzzo thawj zaug sim lub teeb ntawm cov kab mob spores paub txog lawv cov kev tiv thaiv hluav taws xob, hu ua Bacillus pumilus spores.
Guzzo tau hais tias "Yog tias koj tuaj yeem tua cov kab mob no, koj tuaj yeem hais tau tias koj yuav tsum tuaj yeem tua tau lwm cov kab mob uas koj niaj hnub ntsib hauv ib puag ncig," Guzzo tau hais.
Tsis pub dhau 20 vib nas this ntawm UV raug, spore kev loj hlob poob los ntawm 99 feem pua.
Cov kws tshawb fawb tom qab ntawd tsim cov tee dej uas muaj tus kabmob coronavirus lossis HIV los sim ua txoj hauv kev uas tib neeg ntsib tus kabmob no rau pej xeem, xws li hnoos thiab txham. Tom qab ntawd cov tee dej tau raug UV teeb thiab muab tso rau hauv kab lis kev cai saib seb puas muaj tus kab mob tseem ua haujlwm. Tom qab tsuas yog 30 vib nas this ntawm kev kis, tus kab mob muaj peev xwm kis tau los ntawm 93 feem pua.
Thaum kuaj qhov sib txawv ntawm tus kab mob, lawv pom tias cov qauv uas muaj cov kab mob ntau dua tiv taus UV teeb. Tab sis txawm tias muaj cov kab mob loj heev (uas Guzzo hu ua "qhov xwm txheej phem tshaj"), kev kis kab mob tau poob los ntawm 88 feem pua.
Txawm hais tias tsis suav nrog hauv txoj kev tshawb fawb, Guzzo thiab nws cov tub ntxhais kawm kuj tau muab piv rau UV teeb rau ob qho tshuaj tua kab mob hnyav uas siv hauv kev tshawb fawb hauv chav kuaj. Lawv pom tias lub teeb muaj qhov zoo sib xws hauv lawv lub peev xwm los tiv thaiv tus kabmob.
UV-LED Specifications
UV-LEDs tau muab tso rau hauv ob lub teeb, 9 275 nm LEDs hauv 3 × 3 array thiab 20 380 nm LEDs hauv 4 × 5 array. Cov LEDs nyob ntawm kwv yees li 5 cm ntawm cov qauv irradiated, thiab txhua array muab 0.4 rau 0.6 mW / cm ntawm UV teeb. Lub sijhawm irradiation siab tshaj plaws yog 30 vib nas this, ua rau tag nrho cov tshuaj xa tawm ntawm 8 mJ / cm 2 txog 20 mJ / cm 2 rau kev sib xyaw ua ke ntawm cov qauv irradiated. Qhov chaw irradiated yog loj dua li cov qauv irradiated, thiab tag nrho irradiated cheeb tsam ntawm lub cuab yeej yog kwv yees li 10 cm x 20 cm, los yog 200 cm nyob rau hauv tag nrho, ua rau tag nrho cov cheeb tsam ntawm 1.6 J rau 4 J.
Thaum lub teeb tseem ua kom tsawg feem pua ntawm cov kab mob muaj sia, Guzzo tau hais txog "Swiss cheese qauv" ntawm kev tiv thaiv COVID. Txhua lub tswv yim los tawm tsam kev sib kis muaj nws qhov khoob, tab sis txhua txheej yog lwm lub sijhawm los tiv thaiv cov kab mob tsis zoo.
Kev rov raug UV lub teeb yog tus yuam sij kom ntes cov khoom ploj no -- hmoov zoo, nws yooj yim npaum li flipping ib qho kev hloov. Hloov lub teeb pom kev zoo kuj yooj yim dua li kev hloov pauv huab cua pom. Guzzo tau sau tseg tias UV-LED teeb yog pheej yig, tuaj yeem rov qab tau yooj yim rau hauv cov khoom siv uas twb muaj lawm, thiab cov qij muaj lub neej ntev thiab yooj yim los tswj.
Cov teeb no kuj tau txais txiaj ntsig los ntawm automation. Standardized koob tshuaj germicide tuaj yeem xa tuaj txhua lub sijhawm, thiab cov txheej txheem ntawm kev so ib qho chaw nrog tshuaj tua kab mob muaj peev xwm ua rau tib neeg yuam kev. Cov tshuaj thiab pov tseg los ntawm cov tshuaj tua kab mob no kuj xaus rau hauv cov dej thiab cov chaw pov tseg vim yog kev ntxuav tes thiab pov tseg cov ntaub pua plag.
Tab sis lub teeb tsis muaj teeb meem, thiab muaj laj thawj rau cov tshuaj pleev thaiv hnub thiab looj tsom iav dub -- UV hluav taws xob ua rau cov nucleic acids puas tsuaj, thiab rov ua dua, ntev ntev yog qhov teeb meem. Yog vim li cas Guzzo hais tias cov teeb no yuav tsum tau siv thaum cov chaw pej xeem tsis muaj dab tsi, xws li thaum cov tsheb npav tsis muaj chaw ua tiav lawv txoj kev, lossis thaum tsis muaj elevators raug siv. Cov tes tuav ntawm cov escalators tuaj yeem ua kom huv tsis tu ncua los ntawm kev tso UV teeb rau hauv qhov chaw hauv av ntawm txoj kev khiav, ntxuav lawv ntawm txhua qhov kev sib hloov.
Txoj kev tshawb no, luam tawm nyob rau hauv phau ntawv Journal of Virology, qhia txog UV-LED teeb ua ib lub cuab yeej uas yuav siv tau tom qab muaj kev sib kis, zoo tshaj plaws los pab tiv thaiv lwm tus.
