Puas yog UV teeb puas tua kab mob thiab tua kab mob?

Zoo Siab

• Tab sis ua ntej, UV teeb yog dab tsi?
• Puas tuaj yeem siv tshuaj tua kab mob UV tiv thaiv COVID-19?
• Koj puas yuav tau yuav cov khoom siv tshuaj tua kab mob UV?
• Tshuaj xyuas rau

Tom qab lub hlis dhau los ntawm kev ntxuav tes tsis tu ncua, kev nyob nrug deb, thiab hnav lub ntsej muag, nws zoo li tus mob coronavirus tau khawb nws cov pob txha nyob rau hauv kev thauj mus los ntev hauv Asmeskas thiab txij li ob peb qhov ntawm qhov kev paub txaus ntshai no koj ua tau kev tswj hwm yog koj li kev coj ua thiab ib puag ncig, nws tsis muaj qhov xav tsis thoob uas koj-thiab xyaum txhua tus neeg-tau dhau los ua kev nyiam huv. Yog tias koj tsis tau khaws Clorox thiab cov tshuaj tua kab mob rov qab rau lub Peb Hlis, koj yuav tau dhau los ua tus kws tshaj lij ntawm kev tshawb nrhiav Google nrhiav cov lus teb rau cov lus nug xws li "yuav ua li cas tua kab mob?" lossis "vinegar yog tshuaj tua kab mob?" Koj lub luag haujlwm hauv qhov kev tshawb fawb luav qhov yuav tau coj koj mus rau lwm txoj kev tshiab ntawm kev tua kab mob: uas yog, ultraviolet (UV) lub teeb.

UV lub teeb tau siv rau ntau caum xyoo (yog, ntau caum xyoo!) Los txo qis kev kis tus kab mob, xws li cov uas ua rau mob ntsws, raws li US Food and Drug Administration (FDA). Txog rau nws lub peev xwm los tua COVID-19 cov kab mob? Zoo, uas tsis yog li ntawd zoo-tsim. Nyeem ntawv kom paub tus kws tshaj lij-txhawb qhov tseeb txog UV lub teeb, suav nrog seb nws puas tuaj yeem tiv thaiv tus kabmob coronavirus thiab yuav paub dab tsi txog UV cov khoom lag luam lub teeb (piv txwv li teeb, teeb, thiab lwm yam) koj tau pom thoob plaws kev tshaj xov xwm .

Tab sis ua ntej, UV teeb yog dab tsi?

UV lub teeb yog ib hom hluav taws xob uas siv hluav taws xob uas kis tau hauv cov nthwv dej lossis qhov sib txawv ntawm qhov sib txawv yoj yoj thiab ntau zaus, uas ua rau hluav taws xob (EM) spectrum, hais tias Jim Malley, Ph.D. New Hampshire. Hom hluav taws xob ntau tshaj plaws ntawm UV? Lub hnub, uas tsim peb hom sib txawv ntawm cov duab hluav taws xob: UVA, UVB, thiab UVC, raws li FDA. Cov neeg feem coob paub txog UVA thiab UVB cov duab hluav taws xob vim tias lawv tau liam rau qhov kub hnyiab thiab mob qog noj ntshav ntawm daim tawv nqaij. (Muaj feem cuam tshuam: Ultraviolet Radiation ua rau daim tawv nqaij puas tsuaj - Txawm tias thaum koj nyob hauv tsev)

UVC rays, ntawm qhov tod tes, yeej tsis ua rau lub ntiaj teb saum npoo av (cov ozone txheej thaiv 'em), yog li UVC tib neeg lub teeb raug nthuav tawm yog khoom tsim, raws li FDA. Tseem, nws zoo nkauj damn impressive; UVC, uas muaj qhov luv tshaj wavelength thiab lub zog siab tshaj plaws ntawm tag nrho cov hluav taws xob UV, yog cov tshuaj tua kab mob uas paub txog huab cua, dej, thiab qhov chaw tsis muaj dej. Yog li, thaum tham txog kev tua kab mob UV lub teeb, tsom mus rau UVC, hais tias Malley. Nov yog vim li cas: thaum tso tawm ntawm qee qhov nthwv dej thiab rau lub sijhawm tshwj xeeb, UVC lub teeb tuaj yeem ua rau cov khoom siv caj ces puas tsuaj - DNA lossis RNA - hauv cov kab mob thiab kab mob, tiv thaiv lawv lub peev xwm los theej thiab, tig mus, ua rau lawv cov haujlwm ntawm tes ib txwm ua rau tawg. , piav qhia Chris Olson, kws tshuaj microbiologist thiab tus thawj tswj haujlwm ntawm Kev Tiv Thaiv Kev Tiv Thaiv thiab Kev Npaj Thaum Muaj Xwm Ceev ntawm UCHealth Highlands Ranch Tsev Kho Mob. (Ceeb Toom: Thaum UVC rays los ntawm cov khoom siv dag zog kuj tuaj yeem ua rau muaj kev pheej hmoo xws li kub hnyiab ntawm qhov muag thiab tawv nqaij - zoo ib yam li UVA thiab UVB rays - FDA tau txhawb nqa tias cov kev raug mob no "feem ntau daws tsis pub dhau ib lub lis piam" thiab qhov muaj feem ntawm kev mob qog noj ntshav ntawm daim tawv nqaij " yog tsawg heev. ")

Txhawm rau kom UV tshuaj tua kab mob kom zoo, txawm li cas los xij, ntau yam tseem ceeb yuav tsum tau tswj hwm. Ua ntej tshaj, cov duab hluav taws xob yuav tsum yog ntawm qhov nthwv dej kom raug rau lub hom phiaj tus kab mob. Thaum qhov no feem ntau yog nyob ntawm cov kab mob tshwj xeeb, nyob qhov twg ntawm 200-300 nm yog "suav tias yog tshuaj tua kab mob" nrog qhov ua tau zoo tshaj plaws ntawm 260 nm, hais tias Malley. Lawv kuj yuav tsum tau txhaj tshuaj kom raug - UV siv ntau ntxiv los ntawm lub sijhawm sib cuag, nws piav qhia. "Qhov tsim nyog UV koob tshuaj feem ntau xav tau yog dav heev, suav txij li 2 txog 200 mJ/cm2 nyob ntawm qhov xwm txheej tshwj xeeb, cov khoom raug tshuaj tua kab mob, thiab qib xav tau ntawm kev tua kab mob."

Nws tseem yog qhov tseem ceeb uas thaj chaw tsis muaj dab tsi uas tuaj yeem cuam tshuam nrog UVC lub teeb nkag mus rau lub hom phiaj, hais tias Malley. "Peb hais txog kev tua kab mob UV ua kab-ntawm-pom kev thev naus laus zis, yog li yog tias muaj dab tsi thaiv lub teeb UV nrog rau av, xim av, txhua yam ua duab ntxoov ntxoo tom qab ntawd thaj chaw" ntxoov ntxoo lossis tiv thaiv "yuav tsis tua kab mob."

Yog tias lub suab nyuaj me ntsis, qhov ntawd yog vim nws yog: "UV tua kab mob tsis yooj yim; nws tsis yog ib qho me me haum rau txhua qhov," hais txog Malley. Thiab qhov ntawd tsuas yog ib qho laj thawj vim li cas cov kws tshaj lij thiab kev tshawb fawb tseem tsis paub meej tias yuav ua li cas, yog tias tag nrho, nws tuaj yeem tiv thaiv tus kabmob coronavirus. (Saib kuj: Yuav Ua Li Cas Kom Koj Lub Tsev Huv Huv thiab Muaj Kev Noj Qab Nyob Zoo Yog tias Koj Tus Kheej Nyob Hauv Tus Kheej Vim Yog Kab Mob Coronavirus)

Puas tuaj yeem siv tshuaj tua kab mob UV tiv thaiv COVID-19?

UVC muaj cov ntaub ntawv teev tseg tias muaj txiaj ntsig zoo tiv thaiv SARS-CoV-1 thiab MERS, uas yog cov txheeb ze ze ntawm SARS-CoV-2, tus kab mob uas ua rau COVID-19. Ntau qhov kev tshawb fawb, suav nrog cov ntawv ceeb toom los ntawm FDA, tau pom tias UVC lub teeb yuav muaj txiaj ntsig zoo ib yam tiv thaiv SARS-CoV-2, tab sis ntau tus tsis tau tshuaj xyuas ntau. Ntxiv rau, muaj cov ntaub ntawv tshaj tawm txwv tsis pub tshaj tawm txog qhov nthwv dej, koob tshuaj, thiab lub sijhawm UVC hluav taws xob yuav tsum tau ua kom tsis muaj tus kab mob SARS-CoV-2, raws li FDA. Lub ntsiab lus xav tau kev tshawb fawb ntxiv ua ntej leej twg tuaj yeem ua haujlwm - thiab nyab xeeb - pom zoo UVC lub teeb raws li txoj kev ntseeg siab rau kev tua tus kabmob coronavirus.

Uas tau hais tias, UV teeb tau thiab txuas ntxiv siv dav los txhais tau tias kom tsis muaj menyuam hauv, piv txwv li, kev noj qab haus huv. Vim li cas? Kev tshawb fawb tau pom tias UVC hluav taws xob tuaj yeem txiav kev kis tus kab mob loj (xws li staph) los ntawm 30 feem pua. Ntau lub tsev kho mob (yog tias tsis yog feem ntau) siv lub UVC-emitting neeg hlau uas yog hais txog qhov loj ntawm chav tsev tub yees kom ua kom tsis muaj menyuam tag nrho cov chav, hais tias Chris Barty, tus kws kho lub cev thiab tus kws tshaj lij ntawm physics thiab astronomy ntawm University of California, Irvine. Thaum tib neeg tawm hauv chav tsev, cov cuab yeej tau ua haujlwm emitting UV rays, kho tus kheej rau qhov loj ntawm chav tsev thiab qhov sib txawv (piv txwv li duab ntxoov ntxoo, qhov chaw nyuaj mus txog) los tswj lub teeb kom ntev li ntev tau pom tias tsim nyog. Qhov no tuaj yeem 4-5 feeb rau cov chav me xws li chav dej lossis 15-25 feeb rau chav loj, raws li Tru-D, ib hom ntawm cov cuab yeej no. (FWIW, qhov no ua tiav ua ke nrog kev ntxuav tes siv EPA pom zoo tshuaj tua kab mob.)

Qee lub tsev kho mob tseem siv UVC cov thawv nrog lub qhov rooj los tua cov khoom me me xws li iPads, xov tooj, thiab lub tshuab tsom iav. Lwm tus tau teeb tsa UVC cov cuab yeej hauv lawv cov pa cua kom tua kab mob rov ua dua tshiab, hais tias Olson-thiab, muab qhov tseeb tias COVID-19 kis feem ntau los ntawm cov pa aerosol, qhov teeb tsa no ua rau muaj kev nkag siab. Txawm li cas los xij, cov cuab yeej siv kho mob-qib no tsis yog npaj rau kev siv tus kheej; Tsis tsuas yog lawv txwv tsis pub kim, raug nqi ntau dua $ 100k, tab sis lawv kuj xav tau kev cob qhia kom zoo rau kev ua haujlwm tau zoo, ntxiv rau Malley.

Tab sis yog tias koj tau siv sijhawm txaus tshawb fawb COVID-19 cov tshuaj tua kab, koj paub tias muaj cov cuab yeej UV nyob hauv tsev thiab gizmos tsoo lub khw ntawm kev nrawm nrawm tam sim no, txhua yam uas ua kom huv huv muaj peev xwm los ntawm kev nplij siab hauv koj lub tsev. (Muaj feem xyuam: 9 Cov Khoom Zoo Tshaj Plaws Zoo Tshaj Plaws, Raws Li Kws Tshaj Lij)

Koj puas yuav tau yuav cov khoom siv tshuaj tua kab mob UV?

"Feem ntau cov khoom siv tshuaj tua kab mob UV hauv tsev uas peb tau tshuaj xyuas thiab sim [los ntawm peb cov kev tshawb fawb ntawm University of New Hampshire] tsis ua tiav cov kab mob tua kab mob uas lawv tau thov hauv lawv cov ntawv tshaj tawm," hais tias Malley. "Feem ntau tsis muaj zog, tsim tsis zoo, thiab tuaj yeem thov tua 99.9 feem pua ​​​​ntawm cov kab mob, tab sis thaum peb sim lawv lawv feem ntau ua tiav tsawg dua 50 feem pua ​​​​ntawm cov kab mob." (Related: 12 Qhov Chaw Cov Kab Mob Zoo Li Loj Tshaj Plaws uas Koj Tej zaum Yuav Tsum Tau Ntxuav RN)

Barty pom zoo, hais tias cov cuab yeej ua qhov tseeb tso tawm UVC, tab sis "tsis txaus los ua dab tsi tiag tiag hauv lub sijhawm thov." Nco ntsoov, rau UV lub teeb kom tua tau cov kab mob tiag tiag, nws yuav tsum tau ci rau qee lub sijhawm thiab ntawm qee qhov nthwv dej-thiab, thaum nws los txog rau tua COVID-19 tau zoo, ob qho kev ntsuas no tseem yog TBD, raws li FDA.

Thaum cov kws tshaj lij tsis paub meej txog qhov ua tau zoo ntawm UV cov tshuaj tua kab mob tiv thaiv tus kabmob coronavirus, tshwj xeeb tshaj yog rau siv hauv tsev, tsis muaj qhov tsis lees paub tias, ua ntej muaj kev sib kis, UVC lub teeb tau pom (thiab txawm siv) los tua lwm yam kab mob. Yog li, yog tias koj xav muab, hais tias, ib lub teeb UV sim, nws yog qhov ua tau heev uas nws yuav pab txo qis kev sib kis ntawm lwm yam kab mob nyob hauv koj lub tsev. Ob peb yam yuav tsum nco ntsoov ua ntej koj yuav:

Mercury yog tsis muaj. Barty hais tias "Tsev kho mob feem ntau siv cov roj teeb uas muaj mercury vim tias lawv tuaj yeem tsim UVC ntau lub teeb thiab tua kab mob hauv lub sijhawm luv," Tab sis, ICYDK, mercury yog tshuaj lom. Yog li, cov hom UV teeb no yuav tsum tau ceev faj ntxiv thaum ntxuav thiab pov tseg, raws li FDA. Dab tsi ntxiv, mercury teeb kuj tsim UVA thiab UVB, uas tuaj yeem ua rau koj cov tawv nqaij txaus ntshai. Saib rau cov khoom siv tsis muaj mercury, xws li Casetify's UV tshuaj ntxuav tes (Yuav Nws, $120 $100, casetify.com) lossis cov uas tau sau tias "excimer-based," txhais tau tias lawv siv txoj kev sib txawv (sans-mercury) kom xa UV teeb.

Them sai sai rau qhov ntev.Tsis yog txhua yam khoom siv UVC tau tsim sib npaug - tshwj xeeb tshaj yog thaum nws los txog nthwv dej. Raws li tau hais ua ntej, UVC lub nthwv dej tuaj yeem cuam tshuam rau lub cuab yeej ua tau zoo ntawm kev ua kom tsis muaj tus kabmob (thiab yog li tua nws). Nws kuj tseem tuaj yeem cuam tshuam txog kev noj qab haus huv thiab kev nyab xeeb uas cuam tshuam nrog kev siv lub cuab yeej, ua rau koj muaj kev sib tw ntawm kev nrhiav UV lub teeb tua kab mob uas muaj zog txaus los tua cov kab mob yam tsis muaj kev phom sij ntau dhau. Yog li tus lej khawv koob yog dab tsi? Txhua qhov chaw ntawm 240-280 nm, raws li Lub Chaw Tiv Thaiv thiab Tiv Thaiv Kab Mob (CDC). Qhov ntawd tau hais, ib txoj kev tshawb fawb 2017 pom tias wavelengths xws li 207-222 nm kuj tuaj yeem ua tau zoo thiab nyab xeeb (txawm hais tias, tsis yooj yim los ntawm, raws li International Commission on Non-Ionizing Radiation Protection). TL; DR - yog tias nws ua rau koj muaj kev thaj yeeb nyab xeeb lossis nplij siab los tua txawm tias ob peb kab mob hauv koj lub xov tooj, mus rau cov cuab yeej uas tso tawm, feem ntau, 280 nm.

Xav txog koj qhov chaw. UVC lub teeb pom kev zoo tshaj plaws ntawm cov khoom nyuaj, tsis ntxeem tau, raws li FDA. Thiab zoo li tsis muaj txiaj ntsig rau ntawm qhov chaw uas muaj pob lossis roob, vim qhov no ua rau nws nyuaj rau lub teeb UV kom mus txog txhua qhov chaw uas tus kab mob yuav nyob, piav qhia Barty. Yog li, tshuaj tua kab mob hauv lub xov tooj lossis lub vijtsam desktop yuav muaj txiaj ntsig ntau dua li, hais, koj cov ntaub pua tsev. Thiab yog tias koj xav yoj ib puag ncig lub teeb pom kev zoo UV (Yuav Nws, $ 119, amazon.com) zoo li nws yog lub teeb pom kev zoo, koj thawj koom ruam zoo tshaj yog ua li ntawd, piv txwv li, koj chav ua noj countertop (xav: du, tsis muaj zog) , germy). 

Xaiv cov khoom uas kaw. Malley hais zoo li rab ntaj tsis yog koj li thawj koom ruam tshaj plaws, hais tias Malley. Nws piav qhia tias "cov ntaub so ntswg nyob (tib neeg, tsiaj, nroj tsuag) yuav tsum tsis txhob raug UVC ib txwm muaj, tshwj tsis yog tias nws nyob hauv qhov chaw ua tib zoo tswj xyuas nrog cov kws kho mob tau kawm zoo thiab paub txog," nws piav qhia. Qhov ntawd yog vim UVC hluav taws xob tuaj yeem ua rau qhov muag raug mob (xws li photophotokeratitis, qhov tseem ceeb ntawm qhov muag kub hnyiab) thiab tawv nqaij kub hnyiab, raws li FDA. Yog li ntawd, es tsis txhob nthuav tawm cov khoom siv teeb pom kev zoo li lub wand lossis teeb, xaiv rau "cov khoom siv kaw" uas tuaj nrog "cov yam ntxwv kev nyab xeeb (tsis siv neeg kaw cov keyboards, thiab lwm yam) tshem tawm lub peev xwm los nthuav tawm cov ntaub so ntswg nyob rau stray UVC," hais tias Malley. Ib qho kev xaiv zoo: "Lub thawv rau koj lub xov tooj, tshwj xeeb tshaj yog tias [koj lub xov tooj] tso rau hauv qhov ntawd ntev ntev (thaum pw tsaug zog)," xws li PhoneSoap's Smartphone UV Sanitizer (Yuav Nws, $ 80, phonesoap.com).

Tsis txhob saib mus rau hauv lub teeb. Txij li cov txiaj ntsig ntev ntawm UVC rau tib neeg tsis paub, nws tseem ceeb heev uas yuav tsum tau ceev faj heev thaum siv lub cuab yeej. Tsis txhob txuas ntxiv mus rau ntawm daim tawv nqaij thiab ua kom pom tseeb ntawm kev ntsia ncaj qha ntawm lub teeb pom kev zoo, vim tias raug UVC hluav taws xob ncaj qha tuaj yeem ua rau mob qhov muag raug mob lossis kub hnyiab ntawm daim tawv nqaij, raws li FDA. Tab sis, ICYMI ua ntej, cov cuab yeej siv tshuaj tua kab UV koj tuaj yeem yuav tawm ntawm 'gram lossis Amazon yog, hauv Malley cov lus, "tsis muaj zog" thiab tuaj nrog cov cuab yeej kaw tsis siv neeg, txwv kev pheej hmoo. Tseem, zoo dua yuav tsum ceev faj, xav tias peb tsis nkag siab tag nrho cov kev pheej hmoo. (Muaj feem cuam tshuam: Puas tuaj yeem pom lub teeb xiav los ntawm Lub Sijhawm Ua Rau Koj Cov tawv nqaij?)

Kab hauv qab: "Saib cov khoom lag luam nrog kev npaj zoo thiab cov neeg siv phau ntawv zoo, cov lus qhia meej meej ntawm yam khoom siv UV muab rau cov koob tshuaj, thiab qee cov pov thawj ntawm kev ywj pheej thib peb los kuaj xyuas kom paub meej tias qhov kev thov ua haujlwm tau ua los ntawm cov khoom," qhia Malley.

Thiab kom txog thaum muaj kev tshawb fawb ntau ntxiv thiab pom tseeb tias UVC lub teeb tuaj yeem tua qhov tseeb ntawm COVID-19, nws yuav zoo tshaj yog tsuas yog lo rau kev ntxuav ntawm txoj cai nrog CDC pom zoo cov khoom lag luam, mob siab rau nrog kev nyob nrug deb, thiab, thov hnav 👏🏻that 👏 🏻 mask mas.

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