C\u00e1c lo\u1ea1i th\u1ef1c ph\u1ea9m b\u1eb1ng th\u1ecbt nh\u01b0 gi\u0103m b\u00f4ng, l\u1ea1p x\u01b0\u1eddng, th\u1ecbt mu\u1ed1i \u0111\u1ec1u c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. M\u00e0u \u0111\u1ecf n\u00e0y do \u0111\u00e2u m\u00e0 c\u00f3? \u0110\u00f3 l\u00e0 ch\u1ea5t ti\u1ebft ra ch\u00ednh t\u1eeb trong th\u1ecbt.<\/p>\n\n\n\n
Ch\u00fang ta \u0111\u1ec1u bi\u1ebft, m\u00e0u \u0111\u1ecf c\u1ee7a m\u00e1u l\u00e0 do protein m\u00e1u t\u1ea1o th\u00e0nh. C\u00f2n ch\u1ea5t d\u1ecbch c\u00f3 m\u00e0u l\u00e0 m\u1ed9t protein t\u00ean g\u1ecdi l\u00e0 myoglobin. Myoglobin v\u00e0 hemoglobin \u0111\u1ec1u l\u00e0 c\u00e1c protein do m\u1ed9t protein v\u00e0 s\u1eafc t\u1ed1 m\u00e0u \u0111\u1ecf k\u1ebft h\u1ee3p nhau m\u00e0 th\u00e0nh. Trong \u0111\u00f3 s\u1eafc t\u1ed1 m\u00e0u \u0111\u1ecf l\u00e0 m\u1ed9t lo\u1ea1i ch\u1ea5t m\u00e0u, h\u1ea1t nh\u00e2n c\u1ee7a h\u1ee3p ch\u1ea5t l\u00e0 ion s\u1eaft (ho\u00e1 tr\u1ecb II). H\u1ee3p ch\u1ea5t m\u00e0u \u0111\u1ecf t\u01b0\u01a1i \u1edf c\u00e1c lo\u1ea1i th\u1ecbt ch\u00ednh l\u00e0 ch\u1ea5t m\u00e0u myoglobin c\u00f3 ch\u1ee9a ch\u1ea5t s\u1eaft (II), th\u1ebf nh\u01b0ng ion Fe (II) r\u1ea5t d\u1ec5 b\u1ecb oxy c\u1ee7a kh\u00f4ng kh\u00ed oxy ho\u00e1 th\u00e0nh s\u1eaft (III). Khi s\u1eaft (II) \u0111\u00e3 bi\u1ebfn th\u00e0nh s\u1eaft (III) th\u00ec myoglobin s\u1eaft ho\u00e1 tr\u1ecb cao s\u1ebd c\u00f3 m\u00e0u n\u00e2u. V\u00ec v\u1eady lo\u1ea1i th\u1ecbt m\u00e0u \u0111\u1ecf sau m\u1ed9t th\u1eddi gian s\u1ebd bi\u1ebfn \u0111\u1ed5i th\u00e0nh m\u00e0u s\u1eabm n\u00ean kh\u00f4ng h\u1ea5p d\u1eabn \u0111\u01b0\u1ee3c kh\u00e1ch h\u00e0ng. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 th\u1ecbt mu\u1ed1i gi\u1eef \u0111\u01b0\u1ee3c m\u00e0u \u0111\u1ecf t\u01b0\u01a1i?<\/p>\n\n\n\n
Qua th\u1ef1c ti\u1ec5n cu\u1ed9c s\u1ed1ng ng\u01b0\u1eddi ta t\u00ecm th\u1ea5y, ch\u1ec9 c\u1ea7n th\u00eam v\u00e0o th\u1ef1c ph\u1ea9m th\u1ecbt mu\u1ed1i m\u1ed9t \u00edt mu\u1ed1i nitrat ho\u1eb7c h\u1ed7n h\u1ee3p mu\u1ed1i nitrat v\u00e0 nitrit s\u1ebd gi\u1eef cho th\u1ecbt c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. Ng\u00e0y nay ng\u01b0\u1eddi ta th\u01b0\u1eddng d\u00f9ng natri nitrat ho\u1eb7c kali nitrat v\u00e0 c\u00e1c mu\u1ed1i n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u00e1c ch\u1ea5t ph\u00e1t m\u00e0u th\u1ef1c ph\u1ea9m.<\/p>\n\n\n\n
Trong qu\u00e1 tr\u00ecnh ch\u1ebf t\u1ea1o th\u1ecbt mu\u1ed1i, mu\u1ed1i nitrat d\u01b0\u1edbi t\u00e1c d\u1ee5ng c\u1ee7a vi khu\u1ea9n nitrit ho\u00e1 (m\u1ed9t lo\u1ea1i vi khu\u1ea9n y\u1ebfm kh\u00ed) b\u1ecb kh\u1eed th\u00e0nh mu\u1ed1i nitrit, r\u1ed3i l\u1ea1i ti\u1ebfp t\u1ee5c t\u00e1c d\u1ee5ng v\u1edbi axit lactic (do l\u01b0\u1ee3ng \u0111\u01b0\u1eddng trong th\u1ecbt t\u00e1c d\u1ee5ng v\u1edbi vi khu\u1ea9n lactosin t\u1ea1o n\u00ean) \u0111\u1ec3 t\u1ea1o th\u00e0nh nitrit. G\u1ed1c nitrit do m\u1ed9t nguy\u00ean t\u1eed nit\u01a1 v\u00e0 m\u1ed9t nguy\u00ean t\u1eed oxy t\u1ea1o n\u00ean. G\u1ed1c nitrit r\u1ea5t d\u1ec5 k\u1ebft h\u1ee3p v\u1edbi myoglobin th\u00e0nh h\u1ee3p ch\u1ea5t nitrit myoprotein c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. Do h\u1ee3p ch\u1ea5t nitrit myoprotein c\u1ea5u t\u1ea1o h\u1ebft s\u1ee9c b\u1ec1n n\u00ean gi\u1eef cho th\u1ecbt c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i b\u1ec1n.<\/p>\n\n\n\n
Th\u1ebf nh\u01b0ng mu\u1ed1i nitrit l\u00e0 lo\u1ea1i h\u1ee3p ch\u1ea5t g\u00e2y b\u1ec7nh ung th\u01b0, n\u00ean theo ti\u00eau chu\u1ea9n qu\u1ed1c gia ng\u01b0\u1eddi ta ph\u1ea3i h\u1ea1n ch\u1ebf l\u01b0\u1ee3ng nitrit \u1edf m\u1ee9c th\u1ea5p nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c. V\u00ed d\u1ee5 1kg th\u00e0nh ph\u1ea9m nh\u01b0 th\u1ecbt mu\u1ed1i, th\u1ecbt l\u1ea1p x\u01b0\u1eddng th\u01b0\u1eddng ch\u1ee9a kh\u00f4ng qu\u00e1 0,07g nitrit. M\u1ed7i kil\u00f4gam c\u00e1 mu\u1ed1i c\u00f3 kh\u00f4ng qu\u00e1 0,05g nitrit. Cho d\u00f9 nh\u01b0 v\u1eady v\u1edbi c\u00e1c lo\u1ea1i th\u1ecbt mu\u1ed1i v\u00e0 th\u1ecbt l\u1ea1p x\u01b0\u1eddng kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng trong m\u1ed9t th\u1eddi gian d\u00e0i.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Nitrit; Myoglobin protein; Th\u1ecbt l\u1ea1p x\u01b0\u1eddng.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00e1c lo\u1ea1i th\u1ef1c ph\u1ea9m b\u1eb1ng th\u1ecbt nh\u01b0 gi\u0103m b\u00f4ng, l\u1ea1p x\u01b0\u1eddng, th\u1ecbt mu\u1ed1i \u0111\u1ec1u c\u00f3 m\u00e0u \u0111\u1ecf t\u01b0\u01a1i. M\u00e0u \u0111\u1ecf n\u00e0y do \u0111\u00e2u m\u00e0 c\u00f3? \u0110\u00f3 l\u00e0 ch\u1ea5t ti\u1ebft ra ch\u00ednh t\u1eeb trong th\u1ecbt. Ch\u00fang ta \u0111\u1ec1u bi\u1ebft, m\u00e0u \u0111\u1ecf c\u1ee7a m\u00e1u l\u00e0 do protein m\u00e1u t\u1ea1o th\u00e0nh. C\u00f2n ch\u1ea5t d\u1ecbch c\u00f3 m\u00e0u l\u00e0 m\u1ed9t […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[8,15],"tags":[],"class_list":["post-8056","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=8056"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8056\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}