Thaum lub Kaum Ib Hlis 2022, US Environmental Protection Agency (EPA) thaum kawg tau txiav txim siab suav nrog chitosan (lossis Poly-D-Glucosamine) hauv cov npe ntawm cov tshuaj tua kab mob tsawg kawg nkaus. Tsis tas li ntawd, EPA tau taw qhia tias cov tshuaj uas tau teev tseg ntawm no kuj suav nrog chitosan ntsev tsim los ntawm kev sib xyaw chitosan nrog cov kua qaub ntawm cov npe ntawm cov tshuaj tua kab tsawg kawg nkaus cov khoom xyaw lossis cov tshuaj adjuvants. Qhov no yog thawj qhov kev hloov pauv rau cov npe tshuaj tua kab uas muaj kev pheej hmoo qis tshaj plaws hauv xyoo, thiab nws sawv cev rau kev sim los ntawm EPA los qhia rau pej xeem txog kev nyab xeeb lossis qis dua cov khoom lag luam.
1 Dab tsi yog cov tshuaj tua kab uas pheej hmoo tshaj plaws?
Cov tshuaj tua kab uas pheej hmoo tsawg yog hais txog cov khoom siv tshuaj tua kab uas tsis muaj kev phom sij rau tib neeg kev noj qab haus huv lossis ib puag ncig kev nyab xeeb.
Txhawm rau tsom mus rau cov peev txheej ntau ntxiv ntawm cov khoom siv tshuaj tua kab uas ua rau muaj kev pheej hmoo ntau dua rau tib neeg thiab ib puag ncig, US EPA tau zam cov khoom siv tshuaj tua kab uas tsis tshua muaj nqi los ntawm kev sau npe. Txog rau qhov kawg no, US EPA tau tshaj tawm cov npe ntawm cov khoom xyaw nquag thiab cov tshuaj tiv thaiv uas tau tso cai siv rau hauv cov tshuaj tua kab uas pheej hmoo tshaj plaws.
Yog tias cov khoom xyaw nquag thiab cov tshuaj ntxiv uas muaj nyob rau hauv cov khoom siv tshuaj tua kab muaj nyob rau hauv ob daim ntawv teev npe no thiab ua tau raws li cov kev cai ua raws cai, lawv tuaj yeem raug zam los ntawm US EPA tsoom fwv kev sau npe.
2 Paub keeb kwm ntawm chitosan
Chitosan yog ib qho tshwm sim ntawm cov piam thaj molecules uas muaj feem cuam tshuam nrog cellulose. Nws lub npe tshuaj yog Poly-D-Glucosamine (Poly-D-Glucosamine), thiab nws yog ib qho ntawm feem ntau cov tebchaw pom nyob rau hauv cov xwm. Kev lag luam, chitosan yog npaj los ntawm deacetylation ntawm chitin.
Chitosan tam sim no tau sau npe nrog US EPA ua cov tshuaj tua kab mob thiab cov nroj tsuag kev loj hlob uas txhim kho cov nroj tsuag tiv thaiv kab mob fungal. Chitosan yog dav siv hauv textiles, tshuaj pleev ib ce, dej haus thiab kev kho dej.
Thaum Lub Kaum Hli 10, 2018, US EPA tau txais kev thov los ntawm Tidal Vision Products, LLC ntxiv chitosan rau cov npe ntawm cov khoom xyaw nquag tso cai rau siv hauv cov khoom siv tshuaj tua kab tsawg kawg nkaus.
Tom qab kev tshuaj xyuas, US EPA ntseeg tias chitosan thiab lwm yam chitosan ntsev yog cov tshuaj lom neeg tsawg, tsis muaj kev pheej hmoo rau ib puag ncig, thiab ua tau raws li qhov yuav tsum tau zam ntawm kev sau npe, yog li lawv tau suav nrog hauv cov npe ntawm cov khoom xyaw nquag ntawm cov tshuaj tua kab tsawg kawg nkaus. .
EPA kwv yees tias qhov kev daws teeb meem no yuav txuag tau cov neeg sau npe thiab cov chaw tsim khoom ntawm cov khoom siv tshuaj tua kab uas muaj chitosan mus txog $116,000 hauv cov nqi pib thiab kwv yees li $3,400 hauv cov nqi tu txhua xyoo.
3 EPA Kev zam ntawm Cov Cai Sau Npe
Feem ntau, yog tias cov khoom raug zam los ntawm kev sau npe los ntawm EPA, nws yuav tsum ua kom tau raws li cov cai hauv qab no:
❶ Siv dav los ntawm pej xeem;
❷ Yog ib yam khoom noj los yog siv cov khoom noj;
❸ Hom kev ua yog tsis muaj tshuaj lom;
❹ Pom zoo tias muaj kev nyab xeeb los ntawm US Food and Drug Administration (FDA);
❺ Tsis muaj teeb meem cuam tshuam rau tib neeg thiab ib puag ncig;
❻ Hom kev siv nrog tsawg heev raug rau tib neeg lossis ib puag ncig;
❼ Tsis muaj kev nyob ib puag ncig.
Chitosan ua tau raws li tag nrho 7 qhov yuav tsum tau ua saum toj no thiab yog li suav nrog hauv cov npe ntawm cov tshuaj tua kab mob tsawg kawg nkaus uas muaj feem cuam tshuam los ntawm EPA.
Tsis tas li ntawd, tom qab qee qhov xwm txheej tau ntsib, cov khoom lag luam nrog chitosan raws li cov khoom xyaw nquag tuaj yeem raug zam los ntawm kev sau npe yav tom ntej, thiab cov xwm txheej yuav tsum tau ua raws li hauv qab no:
① Cov khoom xyaw nquag muaj nyob rau hauv daim ntawv teev cov tshuaj tua kab mob tsawg kawg nkaus;
② Cov khoom xyaw ntawm adjuvant yog nyob rau hauv cov npe ntawm cov tshuaj tua kab mob tsawg kawg nkaus;
③ Daim ntawv lo ua tau raws li qhov yuav tsum tau ua;
④ Tsis muaj ntaub ntawv hais txog kev noj qab haus huv rau pej xeem.
Tau qhov twg los: AgroPages
