Methylcellulose ndi chowonjezera chofala pa chakudya. Chimapangidwa kuchokera ku cellulose yachilengedwe kudzera mu kusintha kwa mankhwala. Chili ndi mphamvu yokhazikika, yolimba komanso yokhuthala ndipo chimagwiritsidwa ntchito kwambiri mumakampani azakudya. Monga chinthu chosinthidwa mwaluso, chitetezo chake mu chakudya chakhala chikudetsa nkhawa kwa nthawi yayitali.
1. Katundu ndi ntchito za methylcellulose
Kapangidwe ka molekyulu ya methylcellulose kamachokera paβChigawo cha shuga cha -1,4, chomwe chimapangidwa posintha magulu ena a hydroxyl ndi magulu a methoxy. Chimasungunuka m'madzi ozizira ndipo chimatha kupanga gel yosinthika pansi pa mikhalidwe ina. Chili ndi kukhuthala kwabwino, emulsification, suspension, kukhazikika komanso mphamvu zosungira madzi. Ntchito izi zimapangitsa kuti chigwiritsidwe ntchito kwambiri mu buledi, makeke, zakumwa, mkaka, zakudya zozizira ndi zina. Mwachitsanzo, chimatha kusintha kapangidwe ka mtanda ndikuchedwetsa kukalamba; muzakudya zozizira, chimatha kusintha kukana kuzizira ndi kusungunuka.
Ngakhale kuti methylcellulose imagwira ntchito zosiyanasiyana, siilowa m'thupi la munthu kapena kusinthidwa kukhala kagayidwe kake. Pambuyo poimeza, imatulutsidwa makamaka kudzera m'mimba popanda kugayidwa, zomwe zimapangitsa kuti iwoneke ngati yocheperako pa thupi la munthu. Komabe, khalidweli lapangitsanso anthu kuda nkhawa kuti kudya kwake kwa nthawi yayitali kungakhudze thanzi la m'mimba.
2. Kuwunika kwa poizoni ndi maphunziro a chitetezo
Kafukufuku wambiri wa poizoni wasonyeza kuti methylcellulose imagwirizana bwino ndi zinthu zina komanso ili ndi poizoni wochepa. Zotsatira za mayeso oopsa a poizoni zinasonyeza kuti LD50 yake (mlingo wapakati wopha) inali yokwera kwambiri kuposa kuchuluka kwa zakudya zomwe zimagwiritsidwa ntchito muzakudya zachikhalidwe, zomwe zikusonyeza chitetezo champhamvu. Mu mayeso a poizoni a nthawi yayitali, makoswe, mbewa ndi nyama zina sizinawonetse zotsatirapo zoyipa kwambiri zikadyetsedwa kwa nthawi yayitali pamlingo waukulu, kuphatikizapo zoopsa monga khansa, teratogenicity ndi poizoni wobereka.
Kuphatikiza apo, zotsatira za methylcellulose pamatumbo a anthu zaphunziridwanso kwambiri. Chifukwa chakuti sizimagayidwa ndi kuyamwa, methylcellulose imatha kuwonjezera kuchuluka kwa ndowe, kulimbikitsa matumbo ozungulira, komanso ili ndi maubwino ena pochepetsa kudzimbidwa. Nthawi yomweyo, siivunditsidwa ndi zomera zam'mimba, zomwe zimachepetsa chiopsezo cha kudzimbidwa kapena kupweteka m'mimba.
3. Malamulo ndi malamulo
Kugwiritsa ntchito methylcellulose ngati chowonjezera chakudya kumayendetsedwa bwino padziko lonse lapansi. Malinga ndi kuwunika kwa Joint Expert Committee on Food Additives (JECFA) motsogozedwa ndi Food and Agriculture Organization of the United Nations (FAO) ndi World Health Organization (WHO), kudya methylcellulose tsiku lililonse (ADI) "sikunatchulidwe," zomwe zikusonyeza kuti ndi kotetezeka kugwiritsa ntchito mkati mwa mlingo woyenera.
Ku United States, methylcellulose yalembedwa ngati chinthu chodziwika bwino ngati chotetezeka (GRAS) ndi US Food and Drug Administration (FDA). Ku European Union, imagawidwa ngati chakudya chowonjezera E461, ndipo kugwiritsidwa ntchito kwake kwakukulu muzakudya zosiyanasiyana kwafotokozedwa momveka bwino. Ku China, kugwiritsa ntchito methylcellulose kumayendetsedwanso ndi "National Food Safety Standard Food Additive Usage Standard" (GB 2760), yomwe imafuna kuwongolera mwamphamvu mlingo malinga ndi mtundu wa chakudya.
4. Zinthu zofunika kuziganizira pa chitetezo pa ntchito zothandiza
Ngakhale kuti chitetezo cha methylcellulose chili chokwera, kugwiritsa ntchito kwake muzakudya kuyenera kutsatiridwa ndi mfundo zotsatirazi:
Mlingo: Kudya kwambiri chakudya kungayambitse kutupa kapena kusasangalala pang'ono m'mimba.
Anthu omwe akufuna: Kwa anthu omwe ali ndi vuto la m'mimba (monga okalamba kapena ana aang'ono), kuchuluka kwa methylcellulose kungayambitse kusagaya bwino m'mimba kwakanthawi kochepa, choncho iyenera kusankhidwa mosamala.
Kugwirizana ndi zosakaniza zina: Mu zakudya zina, methylcellulose ikhoza kukhala ndi mphamvu yogwirizana ndi zowonjezera zina kapena zosakaniza, ndipo zotsatira zake zonse ziyenera kuganiziridwa.
5. Chidule ndi Kawonedwe
Mwambiri,methylcellulose ndi chakudya chotetezeka komanso chothandiza chomwe sichingawononge thanzi la anthu mkati mwa nthawi yoyenera. Kapangidwe kake kosayamwa kamapangitsa kuti chikhale chokhazikika m'mimba ndipo chingabweretse zabwino zina paumoyo. Komabe, kuti tipitirize kuwonetsetsa kuti chili chotetezeka pakugwiritsa ntchito kwa nthawi yayitali, ndikofunikira kupitiliza kulabadira maphunziro oyenera a poizoni ndi deta yogwiritsira ntchito, makamaka momwe chimakhudzira magulu apadera.
Ndi chitukuko cha mafakitale azakudya komanso kufunikira kwa ogula chakudya chabwino, kuchuluka kwa kugwiritsa ntchito methylcellulose kungakulitsidwe. M'tsogolomu, ntchito zatsopano ziyenera kufufuzidwa poganizira za chitetezo cha chakudya kuti chibweretse phindu lalikulu kumakampani azakudya.
Nthawi yotumizira: Disembala-21-2024