ʻO ke kūlana o kēia manawa a me ka ulu ʻana o nā ʻeke ʻeke ʻuala

He meaʻai palai ka ʻuala a loaʻa ka nui o ka ʻaila a me ka protein. No laila, ʻo ka pale ʻana i ka ʻono a me ka ʻono ʻuala mai ka ʻike ʻia ʻana o ka ʻuala ʻuala kahi mea nui e hopohopo nei i nā mea hana ʻuala he nui. I kēia manawa, ua hoʻokaʻawale ʻia ka ʻōpala o nā ʻuala i ʻelua ʻano:ʻeke a pahu ʻia. Hana ʻia nā ʻāpana ʻuala me ka alumini-plastic composite film a i ʻole ka aluminized composite film, a ʻo nā kīʻaha ʻuala hiki ke hana ʻia me nā barela composite pepa-aluminum-plastic. ʻO ka pale kiʻekiʻe a me ka sila maikaʻi. I mea e hōʻoia ai ʻaʻole hiki ke hoʻoheheʻe ʻia a ʻoki ʻia paha nā ʻuala ʻuala, hoʻopiha nā mea hana ʻuala i loko o ka pūʻolo menaikokene (N2), 'o ia ho'i, 'o ia ho'i, ho'opiha piha 'ia ka nitrogen, e hilina'i ana i ka N, he kinoea inert, no ka pale 'ana i ka 'O2 i loko o ka pū'olo. Inā ʻaʻole i hoʻopaʻa paʻa ʻia ka pahu ʻuala i hoʻohana ʻia no ka ʻuala ʻuala, ʻoi aku ka maʻalahi o ka hoʻololi ʻana i ka ʻike o N2 a i ʻole O2 i loko o ka pūʻolo, i hiki ʻole ai i ka ʻōpala piha piha i ka nitrogen ke pale i nā ʻuala.