ʻO ka hana nui o ka ʻeke vacuum ka wehe ʻana i ka oxygen, i mea e pale ai i ka pōʻino o ka meaʻai.He mea maʻalahi kona kumumanaʻo, no ka mea, ʻo ka meaʻai ka maʻi ma muli o nā hana a nā microorganisms, a ʻo ka hapa nui o nā microorganisms (e like me nā mold a me nā hū) pono ka oxygen e ola ai.Hoʻohana ʻia ka pahu pahu pahu i kēia kumumanaʻo e puhi i ka oxygen i loko o ka ʻeke ʻeke a me nā keʻena meaʻai, i mea e nalowale ai nā mea micro "ke olakino" ʻO ke kaiapuni no ke ola.Hōʻike nā hopena: ke emi ka nui o ka oxygen i loko o ka ʻeke ʻeke ma mua o 1%, e hāʻule nui ka ulu a me ka hoʻonui ʻana o nā microorganism.Ke emi ka nui o ka oxygen ma lalo o 0.5%, e kāohi ʻia ka hapa nui o nā microorganism a hoʻōki i ka hānau ʻana.(E hoʻomanaʻo: ʻaʻole hiki i ka pahu pahu ke pale i ka hana hou ʻana o ka bacteria anaerobic a me ka deterioration a me ka discoloration o ka meaʻai i hoʻokumu ʻia e ka hopena enzyme, no laila pono e hui pū ʻia me nā ʻano kōkua ʻē aʻe, e like me ka refrigeration, wikiwiki wikiwiki, dehydration, kiʻekiʻe wela sterilization, irradiation sterilization , microwave sterilization, salting, etc.) Ma waho aʻe o ka pale ʻana i ka ulu ʻana a me ka hana hou ʻana o nā microorganisms, ʻo ka vacuum deoxidation kekahi mea nui i ka pale ʻana i ka meaʻai.Ma muli o ka nui o nā ʻakika momona unsaturated i loko o nā meaʻai momona, ua hoʻoneʻe ʻia lākou e ka oxygen, kahi e ʻono ai ka meaʻai.Eia kekahi, ʻo ka oxidation ke kumu i ka nalowale o ka huaora A a me C, a lilo nā mea paʻa ʻole i loko o nā puaʻa meaʻai e ka oxygen.No laila, hiki i ka deoxidization ke pale pono i ka pōʻino o ka meaʻai a mālama i kona kala, ʻala, ʻono a me ka waiwai waiwai.