Kev ntsuam xyuas cov zaub mov zoo uas ib txwm siv sij hawm - lossis hnub - los ua hauv chav kuaj tam sim no tuaj yeem ua tiav hauv feeb xwb, tsis tas yuav txawm tawm ntawm cov kab ntau lawm.
"Qhov no yog kev hloov pauv kev ua si rau kev lag luam. Nws tso cai rau koj tawm ntawm chav kuaj thiab sim hauv cov kab ntau lawm lossis txawm tias nyob hauv thaj chaw, "saona, tus xibfwb ntawm kev tshawb fawb txog zaub mov thiab thev naus laus zis ntawm Ohio State University.
Rau 16 xyoo dhau los, tus kws tshawb fawb txog zaub mov nrog Ohio State's College of Food, Agricultural, thiab Environmental Sciences tau tshuaj xyuas kev siv tshuab infrared los txiav txim siab cov khoom noj khoom haus zoo. Rodriguez-Saona kuj yog ib tug kws tshawb fawb nrog Ohio Agricultural Research thiab Development Center, kws tshawb fawb caj npab ntawm tsev kawm qib siab.
Nyob rau hauv plaub lub xyoos dhau los, portable scanners tau tshwm sim nyob rau hauv kev ua lag luam, thiab nws legwork tau ua pov thawj invaluable nyob rau hauv adapting rau cov kev xav tau ntawm kev lag luam khoom noj khoom haus.
Rodriguez-Saona tau hais tias "Nrog kua txiv lws suav, peb tuaj yeem saib 12 tus yam ntxwv sib txawv hauv tsawg dua ib feeb," Rodriguez-Saona hais. "Txhua qhov no yuav siv sijhawm ntau teev, yog tias tsis yog hnub, txhawm rau sau thiab sim ib qho qauv ntawm txoj kev ib txwm muaj."
Ntawm lwm qhov kev koom tes, rau tsib xyoos dhau los Rodriguez-Saona tau cog lus nrog rau California League of Food Processors mus kuaj kua txiv lws suav thiab txiv lws suav muab tshuaj txhuam. California tsim ntau dua 90 feem pua ntawm lub teb chaws cov txiv lws suav ua tiav thiab ze li ib nrab ntawm cov txiv lws suav ua tiav thoob ntiaj teb.
Rodriguez-Saona tau hais tias "Kev ua haujlwm yog qhov zoo heev," "Lawv muaj ntau cov kab ntau lawm, thiab txhua txhua teev lawv xa cov qauv mus rau lub chaw kuaj mob los saib xyuas qhov zoo ntawm cov khoom sib txawv."
Cov kev sim no yuav tsum tau ua kom muaj kev nyab xeeb thiab zoo ntawm cov kua txiv lws suav, feem ntau ntawm cov khoom siv ntxiv rau hauv cov kua txiv lws suav thiab lwm yam khoom.
Tam sim no, kev lag luam tab tom siv thev naus laus zis los ntxiv kev saib xyuas ib txwm muaj, tab sis kev ua haujlwm ntawm Rodriguez-Saona tuaj yeem yog qhov tseem ceeb hauv kev tau txais kev pom zoo los siv nws ua nws txoj kev sim thawj. Txog tam sim no, Rodriguez-Saona tau luam tawm tsib cov ntaub ntawv tshawb fawb ntawm kev siv tshuab infrared rau kev ua cov txiv lws suav.
"Tam sim no, lawv coj cov qauv, coj lawv mus rau qhov chaw kuaj xyuas qhov zoo, thiab nws yuav siv sijhawm ob peb teev los ua kom tiav qee qhov kev xeem. Lawv kuj xav tau cov neeg ua haujlwm txawj ua haujlwm no. Nws yog lub sijhawm siv sijhawm thiab kim heev. "
Yog tias qhov kev ntsuam xyuas pom muaj teeb meem nrog cov khoom, tus processor yuav tsum tau muag nws ntawm luv nqi lossis rov ua dua.
"Tab sis nrog chav tsev no - nws me me, zoo li lub thawv noj su - koj tuaj yeem nqa qhov no mus rau hauv cov nroj tsuag los ua qhov kev ntsuam xyuas lub sijhawm ntawm qhov zoo ntawm cov khoom, thiab ua tweaks rau kev ua haujlwm tam sim ntawd es tsis txhob tos rau cov txiaj ntsig kuaj rov qab los. ”
Hauv nws cov kev tshawb fawb, Rodriguez-Saona siv infrared sensors ua los ntawm cov thawj coj tsim, suav nrog Agilent Technologies thiab Thermo Fisher Scientific. Cov cuab yeej siv hluav taws xob portable infrared tau pib tsim los rau Lub Tsev Haujlwm Saib Xyuas Kev Tiv Thaiv, Lub Tsev Haujlwm Saib Xyuas Tshuaj Tiv Thaiv thiab Kev Lag Luam Tshuaj txhawm rau txheeb xyuas qhov muaj cov khoom tawg thiab cov tshuaj tsis raug cai thiab kuaj tshuaj rau cov khoom cuav. Qee qhov portable scanners loj npaum li lub thawv ntawv thiab lwm tus yog tuav tes.
"Peb yog thawj tus tau txais cov cuab yeej no los saib cov ntawv thov hauv kev lag luam zaub mov," nws hais.
Cov txheej txheem rau kev ntsuam xyuas yog yooj yim deceptively: Ib qho piv txwv ntawm cov khoom, me dua ib tug peas, muab tso rau ntawm lub scanner los yog scanned nrog lub tes tuav spectrometer. Lub teeb infrared tsom cov pab pawg ua haujlwm tshwj xeeb hauv cov molecules uas ua rau cov zaub mov; txawv molecules nqus lub teeb ntawm ntau zaus.
Rodriguez-Saona tau hais tias "Qhov no tsim cov spectrum, uas yog raws li qhov kev nqus ntawm lub teeb," Rodriguez-Saona tau hais. "Peb raug cov spectrum ntawd rau kev tshuaj xyuas ntau yam los txheeb xyuas cov ntaub ntawv peb tab tom nrhiav.
“Kuv sib npaug lub spectrum rau ib daim duab panoramic. Nws muaj ntau cov ntaub ntawv, tab sis txhawm rau nrhiav cov ntaub ntawv koj tab tom nrhiav, koj yuav tsum tau kawm nws ze. Kev tsom xam ntau yam zoo li lub iav tsom iav uas tso cai rau koj ua qhov ntawd, siv cov tshuaj chemometrics los txheeb xyuas cov teeb liab tshwj xeeb uas cuam tshuam nrog ib qho tshwj xeeb molecule.
"Qhov tseeb, nws zoo li nrhiav Waldo."
Rodriguez-Saona tau tsim cov algorithms rau cov scanners siv los kuaj xyuas qhov sib txawv ntawm cov khoom noj, thiab nws kev tshawb fawb xyuas kom meej tias cov txiaj ntsig tau sib npaug nrog cov los ntawm cov kev sim kuaj ib txwm muaj. Cov khoom noj khoom haus kuaj hauv cov txiv lws suav ua tiav tsom rau qhov sib xws, kev ntxhib los mos thiab tsw, nrog rau cov khoom soluble, pH, acidity, viscosity, suab thaj thiab organic acids.
Ntxiv nrog rau kev ua tiav cov txiv lws suav, Rodriguez-Saona thiab nws pab pawg ntawm cov tub ntxhais kawm tiav tau kawm ntau yam ntawm cov qos yaj ywm chips, suav nrog kev soj ntsuam ntawm cov roj zoo thiab cov muaj acrylamide.
Cov roj zoo yog qhov teeb meem, vim tias cov roj noj tau thiab cov rog yog ib qho ntawm feem ntau cov khoom cuav hauv kev lag luam, thiab cov txheej txheem ib txwm siv rau kev sim lawv yog siv sijhawm, nyuaj thiab raug nqi thiab tsim cov khoom pov tseg ntau, Rodriguez-Saona tau hais. Thaum Lub Xya Hli, nws tab tom saib xyuas kev sib tham, Economically Motivated Adulteration: Kev Sib Tw thiab Kev Tsim Kho Tshiab hauv Kev Tshawb Fawb Txog Khoom Noj Khoom Haus, ntawm lub koom haum ntawm Food Technologists txhua xyoo lub rooj sib tham nyob rau hauv Chicago, thiab yuav nthuav qhia txog portable technologies los soj ntsuam rau cov zaub mov adherents.
Lub xub ntiag ntawm acrylamide hauv cov qos yaj ywm chips thiab lwm hom qos yaj ywm kib ntawm qhov kub thiab txias tau ntev lawm qhov teeb meem nyob rau hauv kev lag luam, thiab nyob rau hauv 2010, Lub Koom Haum Saib Xyuas Khoom Noj thiab Kev Ua Liaj Ua Teb thiab Pawg Neeg Saib Xyuas Kev Noj Qab Haus Huv (World Health Organization) tau hu nws tias muaj kev txhawj xeeb txog tib neeg kev noj qab haus huv. Tab sis cov cuab yeej xav tau los ntsuas cov acrylamide yog tus nqi txwv rau feem ntau cov tuam txhab los ua cov kev sim ntawm lawv tus kheej, thiab xa cov qauv mus rau qhov chaw kuaj thib peb tuaj yeem siv sijhawm ntau lub lis piam kom tau txais cov txiaj ntsig, nws hais.
"Tam sim no cov qib Acrylamide tau tswj hwm hauv California nkaus xwb raws li ib feem ntawm Proposition 65, lub npe hu ua Safe Drinking Water thiab Toxic Enforcement Act of 1986, tab sis kuv tau tham ntau nrog cov tuam txhab thiab lawv xav nrhiav txoj hauv kev zoo los ntsuas rau nws. Yog li, peb tab tom ua haujlwm los txhim kho qhov ntawd. "
Rodriguez-Saona tseem tab tom thov nyiaj los ntawm US Department of Agriculture.
"Tam sim no, peb ua haujlwm nrog cov tuam txhab thiab tsim cov algorithms uas haum rau lawv cov ntawv tshwj xeeb. Tab sis nrog USDA nyiaj txiag, peb yuav muaj peev xwm ua hauj lwm rau qee qhov teeb meem loj no, xws li acrylamide lossis kev deev luag poj luag txiv, thiab tsim cov txheej txheem los ua qhov ntsuas infrared ntawm cov zaub mov uas yuav muaj rau txhua tus. "
Cov chaw tsim khoom noj khoom haus hauv Ohio thiab lwm qhov xav paub ntxiv txog kev siv tshuab tuaj yeem tiv tauj Rodriguez-Saona ntawm email ntawm rodriguez-saona.1@osu.edu lossis hu rau 614-292-3339.