Itiye elihlaza liqukethe ikakhulukazi izakhi ezifana ne-ascorbic acid, ama-tannins, ama-polyphenolic compounds, amafutha e-catechin nama-carotenoids.Lezi zithako zisengozini yokuwohloka ngenxa ye-oxygen, izinga lokushisa, umswakama, ukukhanya kanye nephunga lemvelo.Ngakho-ke, lapho upakisha itiye, umthelela walezi zici ezingenhla kufanele wehliswe noma uvinjelwe, futhi izidingo ezithile zimi kanje:
Ukumelana nomswakama
Okuqukethwe kwamanzi etiyeni akufanele kudlule u-5%, kanti u-3% ungcono kakhulu wokugcina isikhathi eside;ngaphandle kwalokho, i-ascorbic acid etiyeni izobola kalula, futhi umbala, iphunga kanye nokunambitheka kwetiye kuzoshintsha, ikakhulukazi emazingeni okushisa aphezulu., izinga lokuwohloka lizosheshiswa.Ngakho-ke, izinto zokupakisha ezinokusebenza okuhle kokuvikela umswakama zingakhethelwa ukupakishwa kobufakazi bomswakama, njengamafilimu ayinhlanganisela asekelwe kucwecwe lwe-aluminium noma ifilimu ehwamukile ye-aluminium foil, engafaka umswakama kakhulu.Ukunakwa okukhethekile kufanele kukhokhwe ekwelapheni okungenamswakama kokupakishwa kwetiye elimnyama.
Ukumelana ne-oxidation
Okuqukethwe komoyampilo ephaketheni kufanele kulawulwe ngaphansi kuka-1%.I-oksijini eningi kakhulu izobangela ezinye izingxenye zetiye ukuthi ziwohloke ngokwe-oxidative.Isibonelo, i-ascorbic acid i-oxidized kalula ibe yi-deoxyascorbic acid, futhi iphinde ihlanganiswe nama-amino acid ukuze ibhekane nokusabela kwe-pigment, okwenza ukunambitheka kwetiye kube kubi nakakhulu.Njengoba amafutha etiye equkethe inani elikhulu lamafutha e-unsaturated fatty acids, lawo mafutha e-unsaturated fatty acid angafakwa ngokuzenzakalelayo ukuze akhiqize izinhlanganisela ze-carbonyl ezifana nama-aldehydes nama-ketone nama-enol compounds, angenza futhi iphunga letiye linyamalale, i-astringency iba lula, futhi umbala uba mnyama.
Ukufiphaza
Njengoba itiye liqukethe i-chlorophyll nezinye izinto, lapho kupakishwa amaqabunga etiye, ukukhanya kufanele kuvikelwe ukuze kuvinjelwe ukusabela kwe-photocatalytic kwe-chlorophyll nezinye izakhi.Ngaphezu kwalokho, imisebe ye-ultraviolet nayo iyisici esibalulekile ekubangeleni ukuwohloka kwamaqabunga etiye.Ukuxazulula izinkinga ezinjalo, ubuchwepheshe bokupakisha be-shading bungasetshenziswa.
Isithiyo segesi
Iphunga lamaqabunga etiye lilahleka kalula, futhi izinto ezibamba umoya kahle kufanele zisetshenziselwe ukupakisha okugcina iphunga.Ngaphezu kwalokho, amaqabunga etiye kulula kakhulu ukumunca iphunga langaphandle, ukuze iphunga lamaqabunga etiye litheleleke.Ngakho-ke, iphunga elikhiqizwa izinto zokupakisha kanye nobuchwepheshe bokupakisha kufanele ilawulwe ngokuqinile.
Izinga lokushisa eliphezulu
Ukwanda kwezinga lokushisa kuzosheshisa ukusabela kwe-oxidation yamaqabunga etiye, futhi ngesikhathi esifanayo kuzobangela ukucwebezela okungaphezulu kwamaqabunga etiye.Ngakho-ke, amaqabunga etiye afaneleka ukugcinwa emazingeni okushisa aphansi.
Ukupakishwa kwesikhwama sefilimu esiyinhlanganisela
Njengamanje, ukupakishwa kwetiye kuya ngokwandayo emakethe kufakwe phakathiizikhwama zefilimu ezihlanganisiwe.Kunezinhlobo eziningi zamafilimu ayinhlanganisela yokupakishwa kwetiye, njenge-cellophane/i-polyethylene/iphepha/i-aluminium foil/i-polyethylene, i-polypropylene/i-aluminium foil/i-aluminium foil/i-polyethylene, i-polyethylene/i-polyvinylidene chloride/i-polyethylene Ine-barrier enhle kakhulu, njll. izakhiwo, ukumelana nomswakama, ukugcinwa kwephunga elimnandi, kanye nephunga eliphikisayo elingavamile.Ukusebenza kwefilimu ehlanganisiwe ene-aluminium foil iphakeme kakhulu, njenge-shading enhle kakhulu nokunye.Kunezinhlobo ezahlukahlukene zokupakisha zezikhwama zefilimu eziyinhlanganisela, kufaka phakathi ukuvala uphawu olunezinhlangothi ezintathu,izikhwama zokuma,izikhwama zokuma ezinefasitela elicacilenokugoqa.Ngaphezu kwalokho, isikhwama sefilimu esiyinhlanganisela sinokuphrinta okuhle, futhi sizoba nomthelela oyingqayizivele lapho sisetshenziselwa ukwakhiwa kokupakisha kokuthengisa.
Isikhathi sokuthumela: Jun-18-2022