{"id":1934,"date":"2023-07-10T23:58:45","date_gmt":"2023-07-10T16:58:45","guid":{"rendered":"https:\/\/lemitfoods.com\/?p=1934"},"modified":"2023-07-18T17:46:52","modified_gmt":"2023-07-18T10:46:52","slug":"nhiet-do-tiet-trung-hoi-nuoc-va-cac-yeu-to-anh-huong","status":"publish","type":"post","link":"https:\/\/lemitfoods.com\/en\/nhiet-do-tiet-trung-hoi-nuoc-va-cac-yeu-to-anh-huong\/","title":{"rendered":"Nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng h\u01a1i n\u01b0\u1edbc v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng"},"content":{"rendered":"

Ti\u1ec7t tr\u00f9ng<\/strong> l\u00e0 qu\u00e1 tr\u00ecnh lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n c\u00e1c vi sinh v\u1eadt c\u00f3 h\u1ea1i v\u00e0 c\u00e1c t\u00e1c nh\u00e2n g\u00e2y b\u1ec7nh trong th\u1ef1c ph\u1ea9m.<\/span><\/p>\n

\n

M\u1ed7i lo\u1ea1i vi sinh v\u1eadt c\u1ea7n ti\u1ec7t tr\u00f9ng s\u1ebd c\u00f3 y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian, nhi\u1ec7t \u0111\u1ed9, \u00e1p su\u1ea5t kh\u00e1c nhau \u0111\u1ec3 ti\u00eau di\u1ec7t ch\u00fang. Do \u0111\u00f3, lo\u1ea1i vvi sinh v\u1eadt c\u1ea7n ti\u1ec7t tr\u00f9ng s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ec7t tr\u00f9ng.<\/span><\/p>\n

Ngo\u00e0i ra, th\u1eddi gian ti\u1ec7t tr\u00f9ng c\u0169ng ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i vi sinh v\u1eadt. N\u1ebfu th\u1eddi gian ti\u1ec7t tr\u00f9ng qu\u00e1 ng\u1eafn, vi sinh v\u1eadt kh\u00f4ng b\u1ecb ti\u00eau di\u1ec7t ho\u00e0n to\u00e0n v\u00e0 c\u00f3 th\u1ec3 sinh s\u00f4i l\u1ea1i, g\u00e2y h\u1ea1i cho s\u1ea3n ph\u1ea9m. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu th\u1eddi gian ti\u1ec7t tr\u00f9ng qu\u00e1 l\u00e2u, s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 b\u1ecb h\u01b0 h\u1ea1i v\u00e0 kh\u00f4ng c\u00f2n an to\u00e0n \u0111\u1ec3 s\u1eed d\u1ee5ng.<\/span><\/p>\n

Do \u0111\u00f3, vi\u1ec7c l\u1ef1a ch\u1ecdn th\u1eddi gian v\u00e0 nhi\u1ec7t \u0111\u1ed9 ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i vi sinh v\u1eadt l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh ti\u1ec7t tr\u00f9ng.<\/span><\/p>\n

\n

C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh ti\u1ec7t tr\u00f9ng<\/strong><\/span><\/h3>\n

+ T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a s\u1ea3n ph\u1ea9m<\/strong><\/span><\/p>\n

C\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p c\u00f3 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd kh\u00e1c nhau nh\u01b0 \u0111\u1ed9 nh\u1edbt v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang. Do \u0111\u00f3 c\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p c\u00f3 th\u1eddi gian truy\u1ec1n nhi\u1ec7t kh\u00e1c nhau.<\/span><\/p>\n

– C\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p s\u1ea3n ph\u1ea9m l\u1ecfng (nh\u01b0 n\u01b0\u1edbc qu\u1ea3) c\u00f3 \u0111\u1ed9 nh\u1edbt th\u1ea5p v\u00e0 t\u1ec9 tr\u1ecdng nh\u1ecf, n\u00ean s\u1ef1 truy\u1ec1n nhi\u1ec7t c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m n\u00e0y x\u1ea3y ra nhanh b\u1eb1ng c\u00e1c d\u00f2ng \u0111\u1ed1i l\u01b0u. Nhi\u1ec7t \u0111\u1ed9 \u1edf gi\u1eefa h\u1ed9p \u0111\u1ea1t t\u1edbi nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng ch\u1eadm h\u01a1n \u1edf thi\u1ebft b\u1ecb \u0111\u1ea1t t\u1edbi nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng kho\u1ea3ng 13 – 15 ph\u00fat.<\/span><\/p>\n

– C\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p s\u1ea3n ph\u1ea9m \u0111\u1eb7c (nh\u01b0 pat\u00e9, th\u1ecbt h\u1ea7m) s\u1ef1 truy\u1ec1n nhi\u1ec7t c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m n\u00e0y b\u1eb1ng c\u00e1ch d\u1eabn nhi\u1ec7t. V\u00ec h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t c\u1ee7a th\u1ef1c ph\u1ea9m nh\u1ecf n\u00ean s\u1ef1 \u0111un n\u00f3ng c\u00e1c s\u1ea3n ph\u1ea9m n\u00e0y x\u1ea3y ra ch\u1eadm. Nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng \u1edf gi\u1eefa h\u1ed9p \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1eadm h\u01a1n nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng \u1edf thi\u1ebft b\u1ecb kho\u1ea3ng 40 ph\u00fat.<\/span><\/p>\n

– C\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p s\u1ea3n ph\u1ea9m c\u00f3 ph\u1ea7n \u1edf th\u1ec3 \u0111\u1eb7c, c\u00f3 ph\u1ea7n \u1edf th\u1ec3 l\u1ecfng (nh\u01b0 \u0111\u1ed3 h\u1ed9p qu\u1ea3 n\u01b0\u00f3c \u0111\u01b0\u1eddng, c\u00e1 ng\u00e2m d\u1ea7u). S\u1ef1 truy\u1ec1n nhi\u1ec7t x\u1ea3y ra theo hai c\u00e1ch : \u0111\u1ed1i l\u01b0u v\u00e0 d\u1eabn nhi\u1ec7t. Nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng \u1edf gi\u1eefa h\u1ed9p \u0111\u1ea1t \u0111\u01b0\u1ee3c ch\u1eadm h\u01a1n nhi\u1ec7t \u0111\u1ed9 ti\u1ec7t tr\u00f9ng \u1edf thi\u1ebft b\u1ecb kho\u1ea3ng 28 ph\u00fat.<\/span><\/p>\n

Ngo\u00e0i ra c\u00e1c dung d\u1ecbch c\u00f3 ch\u1ee9a nhi\u1ec1u \u0111\u01b0\u1eddng, tinh b\u1ed9t, pectin, cellulose l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh ch\u1ea5t v\u1eadt l\u00fd n\u00ean \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian truy\u1ec1n nhi\u1ec7t. C\u00f3 th\u1ec3 k\u00e9o d\u00e0i th\u1eddi gian truy\u1ec1n nhi\u1ec7t.<\/span><\/p>\n

+ T\u00ednh ch\u1ea5t c\u1ee7a bao b\u00ec<\/strong><\/span><\/p>\n

C\u00e1c lo\u1ea1i s\u1ea3n ph\u1ea9m th\u1ef1c ph\u1ea9m \u0111\u1ef1ng trong c\u00e1c lo\u1ea1i bao b\u00ec l\u00e0m b\u1eb1ng v\u1eadt li\u1ec7u kh\u00e1c nhau, c\u00f3 \u0111\u1ed9 d\u1ea7y kh\u00e1c nhau, k\u00edch th\u01b0\u1edbc kh\u00e1c nhau. N\u00ean th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong ch\u1ebf \u0111\u1ed9 ti\u1ec7t tr\u00f9ng kh\u00e1c nhau.<\/span><\/p>\n

–<\/strong>\u00a0\u1ea2nh h\u01b0\u1edfng t\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a bao b\u00ec<\/strong><\/span><\/p>\n

Khi truy\u1ec1n nhi\u1ec7t t\u1eeb m\u00f4i tr\u01b0\u1eddng \u0111un n\u00f3ng b\u00ean ngo\u00e0i v\u00e0o khu v\u1ef1c trung t\u00e2m c\u1ee7a bao b\u00ec. Tr\u01b0\u1edbc h\u1ebft ph\u1ea3i kh\u1eafc ph\u1ee5c nhi\u1ec7t tr\u1edf c\u1ee7a th\u00e0nh bao b\u00ec, nhi\u1ec7t tr\u1edf n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u1ea7y c\u1ee7a bao b\u00ec (\u03b4) v\u00e0 h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u l\u00e0m bao b\u00ec (\u03bb). Nhi\u1ec7t tr\u1edf \u0111\u00f3 bi\u1ec3u th\u1ecb b\u1eb1ng t\u1ec9 s\u1ed1 \u03b4\/\u03bb. Nhi\u1ec7t tr\u1edf chung c\u00e0ng l\u1edbn th\u00ec th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/p>\n

\n\n\n\n\n\n
T\u00ednh ch\u1ea5t v\u1eadt l\u00fd c\u1ee7a c\u00e1c lo\u1ea1i bao b\u00ec<\/span><\/strong><\/caption>\n
Lo\u1ea1i bao b\u00ec<\/strong><\/span><\/td>\nChi\u1ec1u d\u00e0y trung b\u00ecnh\u00a0<\/strong>[\u03b4<\/strong>]<\/strong>(m)<\/span><\/td>\n\u0110<\/strong>\u00a0\u1ed9 d\u1eabn nhi\u1ec7t\u00a0<\/strong>[\u03bb]<\/strong>\u00a0(w\/m.<\/strong>\u00a0o<\/strong>\u00a0C)<\/strong><\/span><\/td>\nNhi\u1ec7t tr\u1edf\u00a0<\/strong>[\u03b4<\/strong>\u00a0\/<\/strong>\u00a0\u03bb]<\/strong>\u00a0(\u00a0<\/strong>o<\/strong>\u00a0C.m<\/strong>\u00a02<\/strong>\u00a0\/w)<\/strong><\/span><\/td>\n<\/tr>\n
S\u1eaft t\u00e2y<\/span><\/td>\n0,24 \u2013 0,26.10-3<\/sup><\/span><\/td>\n46 – 52<\/span><\/td>\n4,6 – 7,8.10-5<\/sup><\/span><\/td>\n<\/tr>\n
Th\u1ee7y tinh<\/span><\/td>\n2 – 6.10-3<\/sup><\/span><\/td>\n0,6 – 0,9<\/span><\/td>\n200 – 1000.10-5<\/sup><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

(Nguy\u1ec5n V\u00e2n Ti\u1ebfp. 2000)<\/em><\/span><\/p>\n

Nh\u01b0ng trong qu\u00e1 tr\u00ecnh ti\u1ec7t tr\u00f9ng, kh\u00f4ng th\u1ec3 nghi\u00ean c\u1ee9u ri\u00eang r\u1ebd \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t tr\u1edf c\u1ee7a bao b\u00ec, m\u00e0 ph\u1ea3i x\u00e9t \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u1ea3 kh\u1ed1i s\u1ea3n ph\u1ea9m :<\/span><\/p>\n

    \n
  • Tr\u01b0\u1eddng h\u1ee3p s\u1ea3n ph\u1ea9m l\u1ecfng \u0111\u1ef1ng trong bao b\u00ec s\u1eaft t\u00e2y: s\u1ef1 truy\u1ec1n nhi\u1ec7t t\u1eeb m\u00f4i tr\u01b0\u1eddng \u0111un n\u00f3ng t\u1edbi th\u00e0nh h\u1ed9p s\u1eaft l\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t ch\u1ee7 y\u1ebfu b\u1eb1ng \u0111\u1ed1i l\u01b0u. Th\u1eddi gian truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c s\u00e0n ph\u1ea9m l\u1ecfng \u0111\u1ef1ng trong bao b\u00ec s\u1eaft t\u00e2y r\u1ea5t ng\u1eafn.<\/span><\/li>\n
  • Tr\u01b0\u1eddng h\u1ee3p s\u1ea3n l\u1ecfng \u0111\u1ef1ng trong bao b\u00ec th\u1ee7y tinh: s\u1ef1 truy\u1ec1n nhi\u1ec7t g\u1ed3m \u0111\u1ed1i l\u01b0u v\u00e0 d\u1eabn nhi\u1ec7t. Th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng n\u00e0y l\u1edbn h\u01a1n th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u1ee7a tr\u01b0\u1eddng h\u1ee3p tr\u00ean.<\/span><\/li>\n
  • Tr\u01b0\u1eddng h\u1ee3p s\u1ea3n ph\u1ea9m \u0111\u1eb7c \u0111\u1ef1ng trong bao b\u00ec s\u1eaft t\u00e2y : s\u1ef1 truy\u1ec1n nhi\u1ec7t \u1edf b\u00ean trong h\u1ed9p ch\u1ee7 y\u1ebfu b\u1eb1ng d\u1eabn nhi\u1ec7t. Th\u1eddi gian \u0111un n\u00f3ng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y s\u1ebd k\u00e9o d\u00e0i h\u01a1n 2 tr\u01b0\u1eddng h\u1ee3p tr\u00ean. V\u00e0 coi th\u1eddi gian \u0111\u00f3 ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o t\u00ednh ch\u1ea5t v\u00e0 nhi\u1ec7t tr\u1edf c\u1ee7a s\u1ea3n ph\u1ea9m \u0111\u1eb7c.<\/span><\/li>\n
  • Tr\u01b0\u1eddng h\u1ee3p s\u1ea3n ph\u1ea9m \u0111\u1eb7c \u0111\u1ef1ng trong bao b\u00ec th\u1ee7y tinh : S\u1ef1 truy\u1ec1n nhi\u1ec7t ch\u1ee7 y\u1ebfu c\u0169ng b\u1eb1ng d\u1eabn nhi\u1ec7t. Th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y d\u00e0i nh\u1ea5t v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a bao b\u00ec th\u1ee7y tinh v\u00e0 s\u1ea3n ph\u1ea9m, trong \u0111\u00f3 t\u00ednh ch\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m gi\u1eef vai tr\u00f2 ch\u1ee7 y\u1ebfu.<\/span><\/li>\n<\/ul>\n

    T\u00f3m l\u1ea1i trong c\u1ea3 4 tr\u01b0\u1eddng h\u1ee3p: T\u00ednh d\u1eabn nhi\u1ec7t v\u00e0 \u0111\u1ed9 d\u1ea7y c\u1ee7a bao b\u00ec ch\u1ec9 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng khi c\u00f3 c\u00e1c d\u00f2ng \u0111\u1ed1i l\u01b0u m\u1ea1nh. Tr\u01b0\u1eddng h\u1ee3p \u0111\u1ed3 h\u1ed9p ch\u1ee9a s\u1ea3n ph\u1ea9m \u0111\u1eb7c, ngh\u0129a l\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t ch\u1ee7 y\u1ebfu b\u1eb1ng d\u1eabn nhi\u1ec7t th\u00ec c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a bao b\u00ec \u00edt c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian truy\u1ec1n nhi\u1ec7t. M\u00e0 ch\u1ee7 y\u1ebfu l\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m, s\u1ea3n ph\u1ea9m c\u00e0ng \u0111\u1eb7c, c\u00e0ng c\u00f3 h\u1ec7 s\u1ed1 d\u00e3n nhi\u1ec7t nh\u1ecf v\u00e0 b\u1ec1 d\u1ea7y l\u1edbp s\u1ea3n ph\u1ea9m t\u1eeb ngo\u00e0i v\u00e0o l\u1edbp gi\u1eefa h\u1ed9p c\u00e0ng l\u1edbn, th\u00ec th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/p>\n

    – \u1ea2nh h<\/strong>\u01b0\u1edfng k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a bao b\u00ec<\/strong><\/span><\/p>\n

    C\u00e1c lo\u1ea1i bao b\u00ec c\u00f3 nh\u1eefng h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc r\u1ea5t ph\u1ee9c t\u1ea1p. N\u00ean vi\u1ec7c nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc c\u1ee7a bao b\u00ec t\u1edbi th\u1eddi gian truy\u1ec1n nhi\u1ec7t ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 l\u1eafm. Lo\u1ea1i bao b\u00ec c\u00f3 k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc \u0111\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 bao b\u00ec h\u00ecnh tr\u1ee5. D\u1ef1a tr\u00ean nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u1ee7a l\u00fd thuy\u1ebft v\u1ec1 truy\u1ec1n nhi\u1ec7t, \u0111\u00e3 t\u00ednh \u0111\u01b0\u1ee3c th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u1ee7a bao b\u00ec h\u00ecnh tr\u1ee5 theo c\u00f4ng th\u1ee9c :<\/span><\/p>\n

    t\u00ad\u00ado<\/sub>\u00a0= A (8,3HD + D2<\/sup>)<\/span><\/p>\n

    V\u1edbi<\/span><\/p>\n

    \"\"<\/span><\/p>\n

    \n
    \n
    \n
    \n
    \n
    <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
    \n
    \n
    \n
    H : chi\u1ec1u cao ngo\u00e0i c\u1ee7a h\u1ed9p, (cm)<\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n

    D : \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a h\u1ed9p, (cm)<\/span><\/p>\n

    T1<\/sub>\u00a0: nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u c\u1ee7a h\u1ed9p, (o<\/sup>\u00adC)<\/span><\/p>\n

    T2<\/sub>\u00a0: nhi\u1ec7t \u0111\u1ed9 khi cu\u1ed1i \u1edf gi\u1eefa h\u1ed9p, (o<\/sup>C)<\/span><\/p>\n

    Tn<\/sub>\u00a0: nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng, (o<\/sup>C)<\/span><\/p>\n

    \u03bb : h\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t chung c\u1ee7a \u0111\u1ed3 h\u1ed9p, (w\/mo<\/sup>C)<\/span><\/p>\n

    to<\/sub>\u00a0: th\u1eddi gian \u0111un n\u00f3ng \u1edf gi\u1eefa h\u1ed9p t\u1eeb nhi\u1ec7t \u0111\u1ed9 T1<\/sub>\u00a0\u0111\u1ebfn T2<\/sub>, (ph\u00fat)<\/span><\/p>\n

    N\u1ebfu thanh tr\u00f9ng c\u00f9ng m\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u1ef1ng trong 2 bao b\u00ec c\u00f3 k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc kh\u00e1c nhau, th\u00ec ta c\u00f3 t\u1ec9 l\u1ec7 \u0111\u01a1n gi\u1ea3n :<\/span><\/p>\n

    \"\"<\/span><\/p>\n

    C\u00f4ng th\u1ee9c n\u00e0y cho ta t\u00ednh \u0111\u01b0\u1ee3c g\u1ea7n \u0111\u00fang th\u1eddi gian truy\u1ec1n nhi\u1ec7t m\u1ed9t lo\u1ea1i \u0111\u1ed3 h\u1ed9p c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00e1c khi \u0111\u00e3 bi\u1ebft th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u1ee7a s\u1ea3n ph\u1ea9m \u0111\u00f3 \u0111\u1ef1ng trong bao b\u00ec x\u00e1c \u0111\u1ecbnh.<\/span><\/p>\n

    C\u00f4ng th\u1ee9c truy\u1ec1n nhi\u1ec7t kh\u00f4ng nh\u1eefng cho bi\u1ebft th\u1eddi gian truy\u1ec1n nhi\u1ec7t m\u00e0 c\u00f2n c\u00f3 th\u1ec3 kh\u1ea3o s\u00e1t \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p \u0111\u00f3. C\u00f9ng m\u1ed9t th\u1ec3 t\u00edch, n\u1ebfu h\u1ed9p d\u1eb9t (H\/D<1) t\u1ee9c l\u00e0 h\u1ed9p c\u00f3 \u0111\u01b0\u00f2ng k\u00ednh l\u1edbn s\u1ebd truy\u1ec1n nhi\u1ec7t nhanh h\u01a1n h\u1ed9p cao. V\u1eadn t\u1ed1c truy\u1ec1n nhi\u1ec7t c\u1ef1c \u0111\u1ea1i khi H\/D \u2248 0,25 .<\/span><\/p>\n

    + \u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u c\u1ee7a \u0111\u1ed3 h\u1ed9p<\/strong><\/span><\/p>\n

    Th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u1ee7a \u0111\u1ed3 h\u1ed9p c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u c\u1ee7a \u0111\u1ed3 h\u1ed9p tr\u01b0\u1edbc khi thanh tr\u00f9ng v\u00e0 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a thi\u1ebft b\u1ecb thanh tr\u00f9ng.<\/span><\/p>\n

    – \u0110\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m l\u1ecfng, do s\u1ef1 truy\u1ec1n nhi\u1ec7t ch\u1ee7 y\u1ebfu b\u1eb1ng c\u00e1c d\u00f2ng \u0111\u1ed1i l\u01b0u, n\u00ean nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u \u00edt c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian truy\u1ec1n nhi\u1ec7t.<\/span><\/p>\n

    – \u0110\u1ed1i v\u1edbi s\u1ea3n ph\u1ea9m \u0111\u1eb7c, th\u00ec s\u1ef1 truy\u1ec1n nhi\u1ec7t ch\u1ee7 y\u1ebfu b\u1eb1ng d\u1eabn nhi\u1ec7t, n\u00ean nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u c\u1ee7a s\u1ea3n ph\u1ea9m c\u00f3 \u1ea3nh h\u01b0\u1edfng nhi\u1ec1u \u0111\u1ebfn v\u1eadn t\u1ed1c truy\u1ec1n nhi\u1ec7t c\u1ee7a s\u1ea3n ph\u1ea9m. \u0110\u1ed3 h\u1ed9p l\u00fac thanh tr\u00f9ng c\u00e0ng ngu\u1ed9i th\u00ec th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/p>\n

    T\u1eeb c\u00f4ng th\u1ee9c to<\/sub>\u00a0= A (8,3 HD + D2<\/sup>), v\u1edbi c\u00e1c gi\u1ea3 thi\u1ebft l\u00e0 nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng \u1edf kho\u1ea3ng 110 – 120o<\/sup>C, nhi\u1ec7t \u0111\u1ed9 \u1edf gi\u1eefa h\u1ed9p sau khi \u0111un n\u00f3ng th\u1ea5p h\u01a1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a thi\u1ebft b\u1ecb l\u00e0 1o<\/sup>C, \u0111\u1ec3 l\u1eadp ra c\u00f4ng th\u1ee9c t\u00ednh g\u1ea7n \u0111\u00fang th\u1eddi gian truy\u1ec1n nhi\u1ec7t \u0111\u1ed3 h\u1ed9p nh\u01b0 sau<\/span><\/p>\n

      \n
    • \u0110\u1ed1i v\u1edbi \u0111\u1ed3 h\u1ed9p lo\u1ea1i ngu\u1ed9i (c\u00f3 nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u : 20 – 45o<\/sup>C)<\/span><\/li>\n<\/ul>\n

      \"\"<\/p>\n

      \n
      \n
      \n
      \n
      \n
      \n
      \n
      <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
        \n
      • \u0110\u1ed1i v\u1edbi \u0111\u1ed3 h\u1ed9p lo\u1ea1i n\u00f3ng ( c\u00f3 nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u : 45 – 90o<\/sup>C)<\/li>\n<\/ul>\n

        \"\"<\/p>\n

        \n
        \n
        \n
        \n
        \n
        \n
        \n
        <\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

        Theo 2 c\u00f4ng th\u1ee9c n\u00e0y khi \u0111un n\u00f3ng \u0111\u1ed3 h\u1ed9p n\u00f3ng th\u00ec r\u00fat ng\u1eafn \u0111\u01b0\u1ee3c 18% th\u1eddi gian truy\u1ec1n nhi\u1ec7t. V\u1eady \u0111\u1ed1i v\u1edbi \u0111\u1ed3 h\u1ed9p c\u00f3 nhi\u1ec7t \u0111\u1ed9 ban \u0111\u1ea7u c\u00e0ng ngu\u1ed9i, th\u00ec v\u1eadn t\u1ed1c truy\u1ec1n nhi\u1ec7t c\u00e0ng nh\u1ecf, th\u1eddi gian truy\u1ec1n nhi\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/p>\n

        + \u1ea2nh h\u01b0\u1edfng c\u1ee7a tr\u1ea1ng th\u00e1i chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a \u0111\u1ed3 h\u1ed9p khi thanh tr\u00f9ng.<\/strong><\/span><\/p>\n

        Trong s\u1ea3n xu\u1ea5t \u0111\u1ed3 h\u1ed9p ph\u1ea7n l\u1edbn c\u00e1c thi\u1ebft b\u1ecb thanh tr\u00f9ng \u0111\u1ec1u l\u00e0 lo\u1ea1i kh\u00f4ng l\u00e0m chuy\u1ec3n \u0111\u1ed9ng h\u1ed9p khi l\u00e0m vi\u1ec7c. V\u00ec v\u1eady th\u1eddi gian truy\u1ec1n nhi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i. Khi t\u1ea1o ra s\u1ef1 \u0111\u1ed1i l\u01b0u nh\u00e2n t\u1ea1o b\u1eb1ng c\u00e1ch l\u00e0m chuy\u1ec3n \u0111\u1ed9ng h\u1ed9p th\u00ec s\u1ef1 truy\u1ec1n nhi\u1ec7t s\u1ebd t\u0103ng l\u00ean. Gi\u1ea3m \u0111\u01b0\u1ee3c th\u1eddi gian truy\u1ec1n nhi\u1ec7t trong ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng.<\/span><\/p>\n

        Mu\u1ed1n t\u1ea1o ra s\u1ef1 \u0111\u1ed1i l\u01b0u nh\u00e2n t\u1ea1o \u0111\u00f3, ng\u01b0\u1eddi ta ch\u1ebf t\u1ea1o c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb thanh tr\u00f9ng c\u00f3 b\u0103ng t\u1ea3i \u0111\u1ed3 h\u1ed9p, th\u01b0\u1eddng l\u00e0 c\u00e1c thi\u1ebft b\u1ecb l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c. T\u00f9y theo c\u1ea5u t\u1ea1o c\u1ee7a m\u1ed7i lo\u1ea1i thi\u1ebft b\u1ecb m\u00e0 \u0111\u1ed3 h\u1ed9p c\u00f3 v\u1eadn t\u1ed1c chuy\u1ec3n \u0111\u1ed9ng quay kh\u00e1c nhau hay ph\u01b0\u01a1ng ph\u00e1p quay kh\u00e1c nhau.<\/span><\/p>\n<\/section>\n<\/div>\n

        \n

        C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt trong qu\u00e1 tr\u00ecnh thanh tr\u00f9ng<\/span><\/strong><\/h3>\n

        + \u1ea2nh h<\/strong>\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng<\/strong><\/span><\/p>\n

        \u1ede nhi\u1ec7t \u0111\u1ed9 60O<\/sup>C th\u00ec c\u00e1c lo\u1ea1i vi sinh v\u1eadt \u0111\u00e3 c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u b\u1ecb ti\u00eau di\u1ec7t. Nh\u01b0ng n\u1ebfu nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng th\u1ea5p th\u00ec ph\u1ea3i k\u00e9o d\u00e0i th\u1eddi gian ti\u00eau di\u1ec7t. Ng\u01b0\u1ee3c l\u1ea1i, nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng c\u00e0ng cao th\u00ec th\u1eddi gian ti\u00eau di\u1ec7t c\u00e0ng ng\u1eafn.<\/span><\/p>\n

        Gi\u1eefa th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt v\u00e0 nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng c\u00f3 m\u1ed1i quan h\u1ec7 logarite. Ng\u01b0\u1eddi ta \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c m\u1ed1i li\u00ean h\u1ec7 \u0111\u00f3 theo ph\u01b0\u01a1ng tr\u00ecnh sau:<\/span><\/p>\n

        T2<\/u>\u00a0– T<\/u>1<\/u><\/span><\/p>\n

        t1 <\/sub>= t2<\/sub>\u2019<\/sup>\u00a0. 10\u00a0Z<\/sup><\/span><\/p>\n

        t1 <\/sub>: th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt t\u01b0\u01a1ng \u1ee9ng v\u1edbi nhi\u1ec7t \u0111\u1ed9 T1<\/sub>\u00a0(ph\u00fat)<\/span><\/p>\n

        t2<\/sub>\u2019<\/sup>: th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt t\u01b0\u01a1ng \u1ee9ng v\u1edbi nhi\u1ec7t \u0111\u1ed9 T2<\/sub>\u00a0(ph\u00fat)<\/span><\/p>\n

        z : h\u1ec7 s\u1ed1 nhi\u1ec7t \u0111\u00f4, t\u00f9y theo t\u00ednh ch\u1ea5t c\u1ee7a m\u1ed7i lo\u1ea1i vi sinh v\u1eadt m\u00e0 c\u00f3 tr\u1ecb s\u1ed1 z kh\u00e1c nhau (lo\u1ea1i ti\u00eau bi\u1ec3u nh\u1ea5t, trong ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng \u0111\u1ed3 h\u1ed9p, ph\u1ea3i lo\u1ea1i tr\u1eeb l\u00e0\u00a0Clostridium botulinum<\/em><\/span>\u00a0c\u00f3 tr\u1ecb s\u1ed1 z = 10O<\/sup>C).<\/span><\/p>\n

        + \u1ea2nh h<\/strong>\u01b0\u1edfng th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a s\u1ea3n ph\u1ea9m<\/strong><\/span><\/p>\n

        Vi sinh v\u1eadt s\u1ed1ng trong m\u00f4i tr\u01b0\u1eddng c\u1ee7a s\u1ea3n ph\u1ea9m th\u1ef1c ph\u1ea9m kh\u00e1c nhau, th\u00ec nhi\u1ec7t \u0111\u1ed9 ti\u00eau di\u1ec7t c\u00e1c lo\u1ea1i vi sinh v\u1eadt \u0111\u00f3 kh\u00f4ng gi\u1ed1ng nhau. V\u00ec v\u1eady c\u1ea7n kh\u1ea3o s\u00e1t c\u00e1c th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a m\u00f4i tr\u01b0\u1eddng th\u1ef1c ph\u1ea9m \u0111\u1ebfn kh\u1ea3 n\u0103ng ti\u00eau di\u1ec7t b\u1eb1ng nhi\u1ec7t c\u00e1c vi sinh v\u1eadt \u0111\u00f3.<\/span><\/p>\n

        \u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 acid: ch\u1ec9 s\u1ed1 pH l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n \u0111\u1ed1i v\u1edbi nhi\u1ec7t c\u1ee7a vi sinh v\u1eadt. N\u1ebfu m\u00f4i tr\u01b0\u1eddng c\u00f3 \u0111\u1ed9 acid ho\u1ea1t \u0111\u1ed9ng c\u00e0ng cao (ch\u1ec9 s\u1ed1 pH nh\u1ecf) th\u00ec \u1edf nhi\u1ec7t \u0111\u1ed9 thanh tr\u00f9ng nh\u1ea5t \u0111\u1ecbnh, th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt c\u00e0ng ng\u1eafn. Tuy nhi\u00ean v\u1eabn c\u00f3 nh\u1eefng tr\u01b0\u1eddng h\u1ee3p c\u00e1 bi\u1ec7t ch\u1ec9 s\u1ed1 pH h\u1ea7u nh\u01b0 kh\u00f4ng c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian ti\u00eau di\u1ec7t vi sinh v\u1eadt.<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n
        \u1ea2nh h\u01b0\u1edfng c\u1ee7a pH \u0111\u1ebfn s\u1ef1 kh\u00e1ng nhi\u1ec7t c\u1ee7a b\u00e0o t\u1eed vi khu\u1ea9n Clostridium sporogenes<\/em> \u1edf nhi\u1ec7t \u0111\u1ed9 115C<\/span><\/caption>\n
        pH<\/span><\/strong><\/td>\nTh\u1eddi gian kh\u00e1ng nhi\u1ec7t t\u1ed1i \u0111a (ph\u00fat)<\/span><\/strong><\/td>\n<\/tr>\n
        5,0<\/span><\/td>\n9<\/span><\/td>\n<\/tr>\n
        5,7<\/span><\/td>\n12<\/span><\/td>\n<\/tr>\n
        6,0<\/span><\/td>\n15<\/span><\/td>\n<\/tr>\n
        6,6<\/span><\/td>\n21<\/span><\/td>\n<\/tr>\n
        7,0<\/span><\/td>\n25<\/span><\/td>\n<\/tr>\n
        7,5<\/span><\/td>\n20<\/span><\/td>\n<\/tr>\n
        8,2<\/span><\/td>\n15<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        (G. Guilmain. 1996)<\/span><\/em><\/span><\/p>\n

        C\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y kh\u00f4ng nh\u1eefng ch\u1ec9 c\u00f3 \u0111\u1ed9 acid ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00f4i tr\u01b0\u1eddng c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n nhi\u1ec7t c\u1ee7a vi sinh v\u1eadt. M\u00e0 lo\u1ea1i acid c\u1ee7a m\u00f4i tr\u01b0\u1eddng c\u0169ng c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3.<\/span><\/p>\n

          \n
        • \u1ea2nh h\u01b0\u1edfng c\u1ee7a n\u1ed3ng \u0111\u1ed9 \u0111\u01b0\u1eddng v\u00e0 mu\u1ed1i: \u0111\u01b0\u1eddng v\u00e0 mu\u1ed1i l\u00e0 nh\u1eefng ch\u1ea5t c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra \u00e1p su\u1ea5t th\u1ea9m th\u1ea5u cao n\u00ean \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng c\u1ee7a vi sinh v\u1eadt.<\/span><\/li>\n<\/ul>\n

          Dung d\u1ecbch \u0111\u01b0\u1eddng c\u00f3 t\u00e1c d\u1ee5ng b\u1ea3o v\u1ec7 vi sinh v\u1eadt l\u00e0m cho ch\u00fang kh\u00f3 b\u1ecb ti\u00eau di\u1ec7t h\u01a1n khi \u0111un n\u00f3ng. N\u1ebfu th\u00e0nh ph\u1ea7n th\u1ef1c ph\u1ea9m c\u00f3 nhi\u1ec1u \u0111\u01b0\u1eddng th\u00ec th\u1eddi gian ti\u00eau di\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/p>\n

          N\u1ebfu t\u0103ng n\u1ed3ng \u0111\u1ed9 mu\u1ed1i th\u00ec \u0111\u1ed9 b\u1ec1n nhi\u1ec7t c\u1ee7a vi sinh v\u1eadt c\u00e0ng gi\u1ea3m, ch\u00fang d\u1ec5 b\u1ecb ti\u00eau di\u1ec7t h\u01a1n.<\/span><\/p>\n

          Nh\u01b0ng n\u1ebfu n\u1ed3ng \u0111\u1ed9 \u0111\u01b0\u1eddng hay mu\u1ed1i qu\u00e1 cao th\u00ec do t\u00e1c d\u1ee5ng c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng ti\u00eau nguy\u00ean sinh, c\u00e1c vi sinh v\u1eadt \u0111\u00f3 y\u1ebfu \u0111i nhi\u1ec1u v\u00e0 d\u1ec5 b\u1ecb ti\u00eau di\u1ec7t.<\/span><\/p>\n

            \n
          • \u1ea2nh h\u01b0\u1edfng c\u1ee7a protid v\u00e0 lipid: trong c\u00e1c s\u1ea3n ph\u1ea9m th\u1ef1c ph\u1ea9m ch\u1ee9a nhi\u1ec1u protid, lipid th\u00ec th\u1eddi gian ti\u00eau di\u1ec7t ph\u1ea3i k\u00e9o d\u00e0i. V\u00ec c\u00e1c ch\u1ea5t n\u00e0y l\u00e0m c\u1ea3n tr\u1edf s\u1ef1 truy\u1ec1n nhi\u1ec7t \u0111\u1ec3 ti\u00eau di\u1ec7t c\u00e1c t\u1ebf b\u00e0o vi sinh v\u1eadt. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y l\u00e0 do dung d\u1ecbch keo (t\u1ebf b\u00e0o vi sinh v\u1eadt) ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t b\u00e9o t\u1ea1o th\u00e0nh m\u00e0ng. T\u1ebf b\u00e0o vi sinh v\u1eadt \u0111\u01b0\u1ee3c m\u00e0ng n\u00e0y b\u1ea3o v\u1ec7 n\u00ean s\u1ef1 d\u1ecbch chuy\u1ec3n n\u01b0\u1edbc t\u1eeb m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0o t\u1ebf b\u00e0o \u0111\u1ec3 l\u00e0m \u0111\u00f4ng t\u1ee5 ph\u1ea7n protid c\u1ee7a t\u1ebf b\u00e0o \u1ea5y s\u1ebd b\u1ecb c\u1ea3n tr\u1edf. V\u00ec v\u1eady trong m\u00f4i tr\u01b0\u1eddng c\u00e0ng nhi\u1ec1u ch\u1ea5t b\u00e9o, c\u00e1c vi sinh v\u1eadt c\u00e0ng ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao, th\u1eddi gian ti\u00eau di\u1ec7t c\u00e0ng k\u00e9o d\u00e0i.<\/span><\/li>\n
          • \u1ea2nh h\u01b0\u1edfng c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc kh\u00e1c: ngo\u00e0i c\u00e1c th\u00e0nh ph\u1ea7n tr\u00ean, th\u00ec c\u00e1c phitonxit c\u0169ng c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng. Th\u1eddi gian thanh tr\u00f9ng \u0111\u1ed3 h\u1ed9p c\u00f3 th\u1ec3 gi\u1ea3m xu\u1ed1ng khi cho th\u00eam m\u1ed9t s\u1ed1 rau hay gia v\u1ecb c\u00f3 ch\u1ee9a nhi\u1ec1u phitonxit nh\u01b0: h\u00e0nh, t\u1ecfi c\u00f3 allycin, c\u00e0 chua c\u00f3 tomatin, \u1edbt c\u00f3 capcaicin, ti\u00eau c\u00f3 piperin … l\u00e0 c\u00e1c ch\u1ea5t c\u00f3 t\u00ednh ch\u1ea5t kh\u00e1ng sinh. Do \u0111\u00f3 khi ch\u1ebf bi\u1ebfn c\u00e1c lo\u1ea1i \u0111\u1ed3 h\u1ed9p th\u1ecbt, c\u00e1 ta cho th\u00eam c\u00e1c gia v\u1ecb n\u00e0y, kh\u00f4ng nh\u1eefng l\u00e0m t\u0103ng h\u01b0\u01a1ng v\u1ecb c\u1ee7a s\u1ea3n ph\u1ea9m m\u00e0 c\u00f2n gi\u1ea3m \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 nhi\u1ec5m tr\u00f9ng trong \u0111\u1ed3 h\u1ed9p tr\u01b0\u1edbc khi thanh tr\u00f9ng. V\u00e0 c\u0169ng gi\u1ea3m \u0111\u01b0\u1ee3c th\u1eddi gian thanh tr\u00f9ng c\u1ea7n thi\u1ebft.<\/span><\/li>\n<\/ul>\n

            + \u1ea2nh h\u01b0\u1edfng c\u1ee7a lo\u1ea1i v\u00e0 s\u1ed1 l\u01b0\u1ee3ng vi sinh v\u1eadt<\/strong><\/span><\/p>\n

              \n
            • Th\u1eddi gian ti\u00eau di\u1ec7t c\u1ee7a m\u1ed9t ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e1c lo\u1ea1i vi sinh v\u1eadt c\u00f3 th\u1ec3 ph\u00e1t tri\u1ec3n trong \u0111\u1ed3 h\u1ed9p, v\u00ec kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a c\u00e1c lo\u1ea1i vi sinh v\u1eadt r\u1ea5t kh\u00e1c nhau. Trong c\u00f9ng m\u1ed9t m\u00f4i tr\u01b0\u1eddng c\u00f3 c\u00f9ng \u0111\u1ed9 acid ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i vi khu\u1ea9n kh\u00f4ng nha b\u00e0o b\u1ecb ti\u00eau di\u1ec7t nhanh h\u01a1n lo\u1ea1i vi khu\u1ea9n c\u00f3 nha b\u00e0o. Th\u1eddi gian ti\u00eau di\u1ec7t c\u1ee7a ph\u1ea7n l\u1edbn c\u00e1c vi sinh v\u1eadt kh\u00f4ng nha b\u00e0o ch\u1ec9 c\u1ea7n \u1edf 60 – 80O<\/sup>C trong v\u00e0i ph\u00fat. C\u00f2n c\u00e1c lo\u1ea1i vi sinh v\u1eadt c\u00f3 nha b\u00e0o ph\u1ea3i \u0111\u00f2i h\u1ecfi th\u1eddi gian k\u00e9o d\u00e0i h\u01a1n nhi\u1ec1u c\u00f3 th\u1ec3 h\u01a1n h\u00e0ng gi\u1edd.<\/span><\/li>\n
            • Th\u1eddi gian ti\u00eau di\u1ec7t trong ch\u1ebf \u0111\u1ed9 thanh tr\u00f9ng c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng vi sinh v\u1eadt nhi\u1ec5m v\u00e0o \u0111\u1ed3 h\u1ed9p. L\u01b0\u1ee3ng vi sinh v\u1eadt nhi\u1ec5m nhi\u1ec1u th\u00ec th\u1eddi gian ti\u00eau di\u1ec7t d\u00e0i, cho th\u1ea5y qua c\u00f4ng th\u1ee9c :<\/span><\/li>\n<\/ul>\n
              \n
              \n
              \n
              \n
              \n
              \n
              \n
              <\/div>\n
              \n
              \"\"<\/div>\n
              Ngu\u1ed3n: https:\/\/voer.edu.vn\/m\/cac-yeu-to-anh-huong-den-thoi-gian-thanh-trung\/2d8a9cbc<\/em><\/span><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

              Ti\u1ec7t tr\u00f9ng l\u00e0 qu\u00e1 tr\u00ecnh lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n c\u00e1c vi sinh v\u1eadt c\u00f3 h\u1ea1i v\u00e0 c\u00e1c t\u00e1c nh\u00e2n g\u00e2y b\u1ec7nh trong th\u1ef1c ph\u1ea9m. M\u1ed7i lo\u1ea1i vi sinh v\u1eadt c\u1ea7n ti\u1ec7t tr\u00f9ng s\u1ebd c\u00f3 y\u00eau c\u1ea7u v\u1ec1 th\u1eddi gian, nhi\u1ec7t \u0111\u1ed9, \u00e1p su\u1ea5t kh\u00e1c nhau \u0111\u1ec3 ti\u00eau di\u1ec7t ch\u00fang. Do \u0111\u00f3, lo\u1ea1i vvi sinh v\u1eadt…<\/p>","protected":false},"author":3,"featured_media":1972,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_stopmodifiedupdate":false,"_modified_date":"","footnotes":""},"categories":[55],"tags":[],"class_list":["post-1934","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghe"],"jetpack_featured_media_url":"https:\/\/lemitfoods.com\/wp-content\/uploads\/2023\/07\/Food-Sterilization-02.jpeg","_links":{"self":[{"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/posts\/1934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/comments?post=1934"}],"version-history":[{"count":4,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/posts\/1934\/revisions"}],"predecessor-version":[{"id":1943,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/posts\/1934\/revisions\/1943"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/media\/1972"}],"wp:attachment":[{"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/media?parent=1934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/categories?post=1934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lemitfoods.com\/en\/wp-json\/wp\/v2\/tags?post=1934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}