Pazasi pane sumo pfupi pamusoro pemaitiro ekuita, mhando pamwe nekuongororwa kwakanyorwa kweakasiyana mapreservatives.
1.Iyo yakazara maitiro echiito chepreservatives
Preservative inonyanya kushandiswa kwemakemikari anobatsira kuuraya kana kumisa zviitiko zvehutachiona mucosmetics pamwe nekuchengetedza huwandu hwese hwezvizoro kwenguva yakareba.
Zvisinei, zvinofanirwa kucherechedzwa kuti zvidziviriro hazvisi bactericide 鈥 hazvina simba rebhaktericidal effect, uye inoshanda chete kana yakashandiswa muhuwandu hwakakwana kana kuti inosangana zvakananga nema microorganisms.
Preservatives inhibisa microbial kukura kuve ichivharira synthesis yeakakosha metabolic enzymes pamwe nekutadzisa kuumbwa kwemapuroteni muzvikamu zvakakosha zvesero kana synthesis ye nucleic acid.
2.Zvinhu zvinokanganisa Mabasa eZvichengetedzo
Zvinhu zvakawanda zvinokonzera kushanda kwezvinochengetedza.Dzinosanganisira;
a.Mhedzisiro yepH
Shanduko yepH inobatsira mukuparara kweorganic acid preservatives, uye nekudaro inokanganisa kushanda kwese kwekuchengetedza.Tora semuenzaniso, pa pH 4 uye pH 6, 2-bromo-2-nitro-1,3-propanediol yakagadzikana kwazvo.
b.Migumisiro yegel uye yakasimba particles
Koalin, magnesium silicate, aluminium etc, ndezvimwe zvidimbu zvehupfu zvinowanikwa mune zvimwe zvizoro, izvo zvinowanzotora kuchengetedza uye zvichiita kuti kurasikirwa kwekuita nekuchengetedza.Zvisinei, mamwe anobudirirawo mukusveta mabhakitiriya aripo mukuchengetedza.Uyewo, kusanganiswa kwemvura-soluble polymer gel uye kuchengetedza kunobatsira kuderedza kusanganiswa kwezvakasara zvekuchengetedza mukugadzirwa kwezvizoro, uye izvi zvakare zvakaderedza kushanda kwekuchengetedza.
c.Solubilization mhedzisiro yenonionic surfactants
Iyo solubilization yeakasiyana surfactants senge nonionic surfactants mune inochengetedza inokanganisawo basa rese rekuchengetedza.Nekudaro, maoiri-soluble nonionic surfactants akadai seHLB=3-6 anozivikanwa kuve ane yakakwirira deactivation inogoneka pane inochengetedza kana ichienzaniswa nemvura inonyungudika nonionic surfactants ine yakakwira HLB kukosha.
d.Mhedzisiro yekuora kwekuchengetedza
Kune zvimwe zvinhu zvakaita sekudziya, mwenje nezvimwe, izvo zvinokonzeresa kuparara kwezvidziviriro, nekudaro zvichikonzera kudzikiswa kwemaitiro avo ekuuraya.Zvikuru, zvimwe zveizvi zvinokonzeresa kuita biochemical reaction semhedzisiro yeradiation sterilization uye disinfection.
e.Mamwe mabasa
Saizvozvowo, zvimwe zvinhu zvakadai sekuvapo kwezvinwiwa uye chelating agents uye kugoverwa kwezvidziviriro mumafuta-mvura maviri-chikamu zvichabatsirawo pakuderedza basa rekuchengetedza kune imwe nzvimbo.
3.The antiseptic properties of preservatives
Iyo antiseptic properties ye preservatives inofanirwa kufungisisa.Kuve nekuwedzeredza kuchengetedza muzvizoro kuchaita kuti itsamwise, nepo kushomeka kwekusungwa kuchakanganisa iyo antiseptic.zvinhu zvekuchengetedza.Nzira yakanakisa yekuongorora iyi kushandisa biological dambudziko bvunzo inosanganisira iyo shoma inhibitory concentration (MIC) uye inhibition zone bvunzo.
Bacteriostatic denderedzwa bvunzo: Muedzo uyu unoshandiswa kuona iwo mabhakitiriya uye mold nekukwanisa kukura nekukurumidza mushure mekurima pane yakakodzera svikiro.Mumamiriro ezvinhu apo sefa bepa disc yakamirirwa nekuchengetedza inodonhedzwa pakati petsika yepakati ndiro, pachava nedenderedzwa rebhakteriostatic rakaumbwa kutenderedza nekuda kwekupinda kwekuchengetedza.Pakuyera dhayamita ye bacteriostatic denderedzwa, inogona kushandiswa seyadhiti kuona kushanda kwekuchengetedza.
Neizvi, zvinogona kutaurwa kuti bacteriostatic denderedzwa uchishandisa nzira yepepa ine dhayamita> = 1.0mm inoshanda chaizvo.MIC inodaidzwa sechishoma chekuchengetedza izvo zvinogona kuwedzerwa mukati mepakati kudzivirira kukura kwehutachiona.Mumamiriro ezvinhu akadaro, diki MIC, iyo yakasimba iyo antimicrobial maitiro ekuchengetedza.
Simba kana mhedzisiro yeantimicrobial chiitiko chinowanzo kuratidzwa muchimiro cheiyo minimum inhibitory concentration (MIC).Nekuita izvi, basa rakasimba reantimicrobial rinotariswa nehukoshi hudiki hweMIC.Kunyangwe iyo MIC isingashandiswe kusiyanisa pakati pekuita kwebhakitiriya uye bacteriostatic, ma surfactants anowanzo zivikanwa kuve ane bacteriostatic mhedzisiro pakudzika kwakadzika uye sterillization maitiro pakusangana kwakanyanya.
Sezvineiwo, panguva dzakasiyana, zviitiko zviviri izvi zvinoitika panguva imwe chete, uye izvi zvinoita kuti zvive zvakaoma kusiyanisa.Nechikonzero ichi, ivo vanowanzopihwa zita remubatanidzwa seantimicrobial disinfection kana kungouraya utachiona.
Nguva yekutumira: Jun-10-2021