1

nkhani

Kodi Ubweya Ndi Chiyani?

KC WABWINO

Furfural ndi mankhwala opangidwa ndi zinthu zakuthupi zomwe zimapangidwira mafakitale. Amapangidwa makamaka ndi zopangidwa kuchokera kuulimi monga mankhusu a oat, chinangwa, chimanga, ndi utuchi. Zina mwazogwiritsidwa ntchito zimaphatikizapo wakupha udzu, fungicide, ndi zosungunulira. Ndichinthu chodziwika bwino pakupanga mafuta oyendera komanso pokonza mafuta othira mafuta. Mankhwalawa ndiwofunikira pakupanga mafakitale ena angapo.

Urfural ndi mankhwala opangidwa ndi zinthu zakuthupi zomwe zimapangidwira mafakitale.

Pakapangidwa misa, mankhwalawa amapangidwa poika pentosan polysaccharides kudzera mu asidi hydrolysis, kutanthauza kuti mapadi ndi zokometsera zoyambira zimasandulika shuga pogwiritsa ntchito asidi. Chidebe chotsitsimula, ubweya wake ndiwowoneka bwino, wopanda utoto, komanso wamafuta, ndipo amakhala ndi fungo ngati la amondi. Kuwonetsedwa ndi mpweya kumatha kukongoletsa madzi mumithunzi kuyambira chikaso mpaka bulauni.

Furfural ndiyomwe imasungunuka m'madzi ndipo imasungunuka kwathunthu mu ether ndi ethanol. Kuphatikiza pazogwiritsa ntchito ngati mankhwala okhaokha, imagwiritsidwanso ntchito popanga mankhwala monga @alirezatalischioriginal, furfuyl, nitrofurans, ndi methylfuran. Mankhwalawa amagwiritsidwanso ntchito popanga zinthu, kuphatikizapo mankhwala aulimi, mankhwala, ndi zotchingira.

Pali njira zingapo zomwe anthu amakumanirana ndi ubweya wamtundu. Kuphatikiza pa kukhudzana ndi mankhwalawa pokonza, amatha kupezeka mwachilengedwe m'mitundu ingapo ya chakudya. Kuwonetsa kuwala kwamtunduwu sikunatsimikizidwe kuti ndi kowopsa.

Kuwonjezeka kwambiri kwa ubweya wamtundu kungakhale poizoni. M'mayeso a labotale pa anthu ndi nyama, ubweya wapezeka kuti umakwiya pakhungu, mamina ndi maso. Zimanenanso kuti zadzetsa pakhosi komanso kupuma. Ena anena zakanthawi kochepa kokhudzana ndi mankhwalawa m'malo omwe alibe mpweya wabwino monga kupuma movutikira, lilime lofooka, komanso kulephera kulawa. Zotsatira zakanthawi yayitali zamtunduwu zimatha kutuluka pakhungu ngati chikanga ndi photosensitization pamavuto amawonedwe ndi edema ya m'mapapo.

Furfural idayamba kugwiritsidwa ntchito kwambiri mu 1922 pomwe Quaker Oats Company idayamba kuyipanga ndi oat hulls. Oats akupitiliza kukhala imodzi mwanjira zodziwika bwino zopangira mankhwala. Pambuyo pake, amangogwiritsa ntchito mafuta onunkhira. Idapangidwa koyamba mu 1832 ndi a Johann Wolfgang Döbereiner, katswiri wamagetsi waku Germany yemwe anali kugwiritsa ntchito mitembo ya nyerere kuti apange asidi wa formic, yemwe chopangidwacho chinali chochokera. Nyerere zimakhulupirira kuti zakhala zikuthandiza popanga mankhwala chifukwa matupi awo anali ndi mtundu wazomera zomwe zikugwiritsidwa ntchito pakalipano.


Post nthawi: Aug-13-2020