Cov tshuaj tua kab tuaj yeem pab cov neeg ua liaj ua teb nce zaub mov, txo cov qoob loo poob siab, thiab tseem tiv thaiv kev kis kab mob los ntawm kab, tab sis vim tias cov tshuaj no kuj tuaj yeem nkag mus rau tib neeg cov zaub mov, ua kom lawv txoj kev nyab xeeb yog qhov tseem ceeb.Rau cov tshuaj tua kab uas nquag siv hu ua glyphosate, tib neeg txhawj xeeb txog kev nyab xeeb ntawm cov zaub mov thiab kev nyab xeeb ntawm ib qho ntawm nws cov khoom siv hu ua AMPA.Cov kws tshawb fawb ntawm National Institute of Standards and Technology (NIST) tab tom tsim cov ntaub ntawv siv los ua kom qhov tseeb ntsuas ntawm glyphosate thiab AMPA uas nquag pom hauv cov zaub mov oat.googletag.cmd.push(function(){googletag.display('div-gpt-ad-1449240174198-2');});
Lub Chaw Saib Xyuas Kev Tiv Thaiv Ib Cheeb Tsam (EPA) tau teeb tsa kev ua siab ntev rau qib tshuaj tua kab hauv cov khoom noj uas tseem suav tias muaj kev nyab xeeb noj.Cov chaw tsim khoom noj khoom haus sim lawv cov khoom kom ntseeg tau tias lawv ua raws li EPA cov cai.Txawm li cas los xij, txhawm rau xyuas kom meej tias lawv qhov ntsuas tau raug, lawv yuav tsum siv cov khoom siv (RM) nrog cov ntsiab lus glyphosate paub los sib piv nrog lawv cov khoom.
Hauv oatmeal lossis oatmeal-raws li cov khoom lag luam uas siv ntau cov tshuaj tua kab, tsis muaj cov ntaub ntawv siv tau los ntsuas glyphosate (cov khoom muaj nyob hauv cov khoom lag luam Roundup).Txawm li cas los xij, ib qho me me ntawm cov zaub mov raws li RM tuaj yeem siv los ntsuas lwm yam tshuaj tua kab.Txhawm rau txhim kho glyphosate thiab ua tau raws li cov kev xav tau tam sim ntawm cov tuam txhab tsim khoom, NIST cov kws tshawb fawb tau ua kom zoo dua ib txoj hauv kev los soj ntsuam glyphosate hauv 13 cov qauv khoom noj uas muaj oat-raws li kev lag luam txhawm rau txheeb xyuas cov neeg siv khoom siv.Lawv kuaj pom glyphosate nyob rau hauv tag nrho cov qauv, thiab AMPA (luv rau amino methyl phosphonic acid) tau pom nyob rau hauv peb ntawm lawv.
Tau ntau xyoo lawm, glyphosate yog ib qho tshuaj tua kab tseem ceeb tshaj plaws hauv Tebchaws Meskas thiab hauv ntiaj teb.Raws li kev tshawb fawb 2016, hauv 2014 ib leeg, 125,384 metric tons ntawm glyphosate tau siv hauv Tebchaws Meskas.Nws yog tshuaj tua kab mob, tshuaj tua kab, siv los rhuav tshem cov nroj tsuag lossis cov nroj tsuag uas tsim kev puas tsuaj rau cov qoob loo.
Qee zaum, cov tshuaj tua kab seem hauv cov zaub mov tsawg heev.Raws li kev txhawj xeeb txog glyphosate, nws tuaj yeem tawg mus rau hauv AMPA, thiab nws tuaj yeem nyob twj ywm ntawm txiv hmab txiv ntoo, zaub thiab nplej.Lub peev xwm cuam tshuam ntawm AMPA rau tib neeg kev noj qab haus huv tsis nkag siab zoo thiab tseem yog ib qho chaw tshawb fawb.Glyphosate kuj tseem siv dav hauv lwm cov nplej thiab nplej, xws li barley thiab nplej, tab sis oats yog qhov tshwj xeeb.
Tus kws tshawb fawb NIST Jacolin Murray tau hais tias: "Oats yog qhov tshwj xeeb zoo li nplej.""Peb xaiv oats ua thawj cov khoom siv vim tias cov neeg tsim khoom noj siv glyphosate ua ib qho desiccant kom qhuav cov qoob loo ua ntej sau qoob.Oats feem ntau muaj glyphosate ntau.Phosphine."Cov qoob loo kom qhuav tuaj yeem ua rau sau ua ntej thiab txhim kho cov qoob loo sib xws.Raws li tus kws sau ntawv Justine Cruz (Justine Cruz), vim muaj ntau yam kev siv glyphosate, glyphosate feem ntau pom muaj ntau dua li lwm yam tshuaj tua kab.
13 cov qauv oatmeal hauv txoj kev tshawb no suav nrog oatmeal, me me rau cov txheej txheem oatmeal noj tshais, thiab oat hmoov los ntawm cov qauv kev ua liaj ua teb thiab cov organic.
Cov kws tshawb fawb tau siv txoj kev txhim kho ntawm kev rho tawm glyphosate los ntawm cov khoom noj khoom haus, ua ke nrog cov txheej txheem txheej txheem hu ua kua chromatography thiab huab hwm coj spectrometry, los tshuaj xyuas cov glyphosate thiab AMPA hauv cov qauv.Hauv thawj txoj kev, cov qauv khoom yog yaj hauv cov kua sib tov thiab tom qab ntawd glyphosate raug tshem tawm ntawm cov zaub mov.Tom ntej no, hauv cov kua chromatography, cov glyphosate thiab AMPA nyob rau hauv cov qauv extract yog cais los ntawm lwm yam Cheebtsam hauv cov qauv.Thaum kawg, qhov loj spectrometer ntsuas qhov loj-rau-them piv ntawm cov ions txhawm rau txheeb xyuas cov tebchaw sib txawv hauv cov qauv.
Lawv cov txiaj ntsig tau pom tias cov qauv noj tshais organic (26 ng ib gram) thiab cov qauv oat hmoov (11 ng ib gram) muaj cov qib qis tshaj ntawm glyphosate.Qhov siab tshaj plaws ntawm glyphosate (1,100 ng ib gram) tau kuaj pom nyob rau hauv ib qho piv txwv ntawm cov pa instant oatmeal.Cov ntsiab lus AMPA hauv cov organic thiab cov qauv oatmeal thiab oat-raws li cov qauv yog qis dua li cov ntsiab lus glyphosate.
Cov ntsiab lus ntawm tag nrho cov glyphosate thiab AMPA nyob rau hauv oatmeal thiab oat-based cereals nyob deb ntawm EPA kam rau ua ntawm 30 μg / g.Murray tau hais tias: "Qhov siab tshaj plaws glyphosate peb ntsuas yog 30 npaug qis dua li kev tswj hwm kev txwv."
Raws li cov txiaj ntsig ntawm qhov kev tshawb fawb no thiab kev sib tham ua ntej nrog cov neeg koom nrog xav siv RM rau oatmeal thiab oat nplej, cov kws tshawb fawb pom tias kev txhim kho qib qis ntawm RM (50 ng ib gram) thiab qib siab ntawm RM yuav tau txais txiaj ntsig.Ib qho (500 nanograms ib gram).Cov RMs no tau txais txiaj ntsig zoo rau cov chaw soj ntsuam kev ua liaj ua teb thiab zaub mov thiab cov chaw tsim khoom noj khoom haus uas yuav tsum tau kuaj cov tshuaj tua kab hauv lawv cov ntaub ntawv raw thiab xav tau tus qauv tseeb los sib piv nrog lawv.
NIST's RM yog siv tsis yog hauv Tebchaws Meskas nkaus xwb, tab sis kuj thoob ntiaj teb.Yog li ntawd, nws yog ib qho tseem ceeb rau cov kws tshawb fawb los txiav txim siab txog kev txwv txawv teb chaws.Piv txwv li, hauv Tebchaws Europe, qhov txwv yog 20 micrograms ib gram.
NIST tus kws tshawb fawb Katrice Lippa tau hais tias: "Peb cov kws tshawb fawb yuav tsum sib npaug cov kev xav tau ntawm cov chaw soj ntsuam zaub mov hauv Tebchaws Meskas thiab lwm thaj chaw txhawm rau ua kom cov ntaub ntawv siv tau muaj kev cuam tshuam thoob ntiaj teb."
Cov kws tshawb fawb tuaj yeem txheeb xyuas peb tus neeg sib tw RM uas muaj peev xwm rau glyphosate thiab ob tus neeg sib tw rau AMPA hauv oat-based nplej.Lawv kuj tseem tuaj yeem ua qhov kev tshawb fawb txog kev ruaj ntseg ua ntej, thiab cov txiaj ntsig tau pom tias glyphosate ruaj khov hauv oats ntawm qhov kub thiab txias ntawm 40 degrees Celsius rau rau lub hlis, uas yog qhov tseem ceeb rau kev txhim kho RMs yav tom ntej, uas tej zaum yuav yog nyob ntawm ib lossis ntau dua. ntawm cov khoom no.
Tom ntej no, cov kws tshawb fawb npaj los soj ntsuam qhov ua tau ntawm RM los ntawm kev tshawb fawb hauv chav kuaj, thiab tom qab ntawd ua cov kev tshawb fawb ntev ntev ntawm glyphosate thiab AMPA hauv lawv cov ntaub ntawv.Pab pawg NIST yuav txuas ntxiv ua haujlwm nrog cov neeg koom tes los xyuas kom meej tias RM tuaj yeem ua tau raws li lawv cov kev xav tau.
Koj tuaj yeem tso siab tau tias peb cov neeg ua haujlwm kho mob yuav saib xyuas txhua qhov kev tawm tswv yim xa mus thiab yuav ua qhov tsim nyog.Koj lub tswv yim tseem ceeb heev rau peb.
Koj tus email chaw nyob tsuas yog siv los qhia rau tus neeg tau txais kev paub tias leej twg xa email.Tsis yog koj qhov chaw nyob lossis tus neeg txais qhov chaw nyob yuav tsis raug siv rau lwm lub hom phiaj.Cov ntaub ntawv koj sau yuav tshwm sim hauv koj tus email, tab sis Phys.org yuav tsis khaws cia rau hauv ib daim ntawv.
Xa txhua lub limtiam thiab/lossis hloov tshiab txhua hnub rau koj lub inbox.Koj tuaj yeem tshem tawm txhua lub sijhawm, thiab peb yuav tsis qhia koj cov ntsiab lus rau peb tog.
Lub vev xaib no siv cov ncuav qab zib los pab kev taw qhia, txheeb xyuas koj qhov kev siv peb cov kev pabcuam thiab muab cov ntsiab lus los ntawm peb tog.Los ntawm kev siv peb lub vev xaib, koj paub tseeb tias koj tau nyeem thiab nkag siab txog peb txoj cai ntiag tug thiab cov ntsiab lus ntawm kev siv.