{"id":26515,"date":"2021-01-25T21:52:08","date_gmt":"2021-01-25T14:52:08","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=26515"},"modified":"2022-02-08T09:49:09","modified_gmt":"2022-02-08T02:49:09","slug":"bao-quan-xoai-thanh-long-tuoi-ngon-den-40-ngay","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/bao-quan-xoai-thanh-long-tuoi-ngon-den-40-ngay\/","title":{"rendered":"B\u1ea3o qu\u1ea3n xo\u00e0i, thanh long t\u01b0\u01a1i ngon \u0111\u1ebfn 40 ng\u00e0y"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>B\u1eb1ng c\u00f4ng ngh\u1ec7 m\u00e0ng b\u00e1n th\u1ea5m, TS Tr\u1ea7n L\u00ea Quan \u0111\u00e3 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng quy tr\u00ecnh b\u1ea3o qu\u1ea3n xo\u00e0i, thanh long t\u01b0\u01a1i ngon \u0111\u1ebfn 40 ng\u00e0y, \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u xu\u1ea5t kh\u1ea9u.<\/strong><\/h2>\n\n\n\n<p><strong>Ch\u1ecdn c\u00f4ng ngh\u1ec7 t\u1ed1i \u01b0u<\/strong><\/p>\n\n\n\n<p>\u0110\u1ec1 t\u00e0i \u201cNghi\u00ean c\u1ee9u ch\u1ebf t\u1ea1o&nbsp;<a href=\"https:\/\/khoahocdoisong.vn\/mang-ban-tham-ptag.html\">m\u00e0ng b\u00e1n th\u1ea5m<\/a>&nbsp;v\u00e0 ho\u00e0n thi\u1ec7n c\u00f4ng ngh\u1ec7 b\u1ea3o qu\u1ea3n xo\u00e0i v\u00e0 thanh long xu\u1ea5t kh\u1ea9u\u201d do TS Tr\u1ea7n L\u00ea Quan, Trung t\u00e2m Nghi\u00ean c\u1ee9u h\u00f3a sinh \u1ee9ng d\u1ee5ng l\u00e0m ch\u1ee7 nhi\u1ec7m v\u00e0 do S\u1edf Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 TPHCM th\u1ef1c hi\u1ec7n. TS Tr\u1ea7n L\u00ea Quan cho r\u1eb1ng, h\u1ea1n ch\u1ebf l\u1edbn nh\u1ea5t c\u1ee7a Vi\u1ec7t Nam trong xu\u1ea5t kh\u1ea9u rau qu\u1ea3 l\u00e0 ch\u01b0a c\u00f3 c\u00f4ng ngh\u1ec7 t\u1ed1i \u01b0u, khi\u1ebfn kh\u00f3 v\u1eadn chuy\u1ec3n b\u1eb1ng \u0111\u01b0\u1eddng bi\u1ec3n. \u0110\u1ed1i v\u1edbi tr\u00e1i xo\u00e0i, xu\u1ea5t kh\u1ea9u b\u1eb1ng \u0111\u01b0\u1eddng h\u00e0ng kh\u00f4ng chi ph\u00ed r\u1ea5t cao, kh\u00f4ng th\u1ec3 c\u1ea1nh tranh \u0111\u01b0\u1ee3c v\u1edbi xo\u00e0i c\u1ee7a \u1ea4n \u0110\u1ed9 v\u00e0 Nam M\u1ef9.<\/p>\n\n\n\n<p>Hi\u1ec7n nay,&nbsp;nhi\u1ec1u c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t qu\u1ea3 t\u01b0\u01a1i c\u0169ng \u0111\u00e3 nh\u1eadp m\u1ed9t s\u1ed1 m\u00e0ng b\u00e1n th\u1ea5m v\u1edbi ch\u1ea5t n\u1ec1n l\u00e0 s\u00e1p \u0111\u1ed9ng th\u1ef1c v\u1eadt, protein th\u1ef1c v\u1eadt, m\u00e0ng polysaccharid&#8230; v\u1ec1 s\u1eed d\u1ee5ng nh\u01b0ng gi\u00e1 r\u1ea5t \u0111\u1eaft, l\u00e0m gi\u00e1 th\u00e0nh xu\u1ea5t kh\u1ea9u t\u0103ng cao kh\u00f3 c\u1ea1nh tranh v\u1edbi n\u01b0\u1edbc ngo\u00e0i. \u0110\u1ed1i v\u1edbi thanh long, m\u1ed9t s\u1ed1 c\u01a1 quan nghi\u00ean c\u1ee9u trong n\u01b0\u1edbc c\u00f3 nhi\u1ec1u c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u b\u1ea3o qu\u1ea3n thanh long ru\u1ed9t tr\u1eafng ch\u1ee7 y\u1ebfu d\u1ef1a v\u00e0o c\u00e1c bi\u1ec7n ph\u00e1p nh\u01b0 s\u00e1t tr\u00f9ng b\u1ec1 m\u1eb7t v\u1edbi c\u00e1c ch\u1ea5t s\u00e1t khu\u1ea9n nh\u01b0 chlorine n\u1ed3ng \u0111\u1ed9 200ppm C1 ho\u1ea1t \u0111\u1ed9ng, kali sorbat 0,1% hay benomyl 500ppm\u2026 nh\u01b0ng kh\u00f3 \u00e1p d\u1ee5ng.<\/p>\n\n\n\n<p>Xo\u00e0i v\u00e0 thanh long gi\u1ed1ng nh\u01b0 nh\u1eefng tr\u00e1i c\u00e2y nhi\u1ec7t \u0111\u1edbi kh\u00e1c, khi b\u1ea3o qu\u1ea3n \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n nhi\u1ec7t \u0111\u1ed9 t\u1edbi h\u1ea1n, xo\u00e0i d\u01b0\u1edbi 10 \u0111\u1ed9 C, thanh long d\u01b0\u1edbi 7 \u0111\u1ed9 C th\u00ec b\u1ecb t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh, v\u1ecf&nbsp;b\u1ecb nh\u0103n gi\u1ed1ng nh\u01b0 b\u1ecb b\u1ecfng, c\u00f3 nhi\u1ec1u v\u1ebft s\u1eb9o m\u00e0u x\u00e1m \u0111en, th\u1ecbt b\u1ecb s\u01b0\u1ee3ng kh\u00f4ng c\u00f2n \u0103n \u0111\u01b0\u1ee3c. \u0110\u1ebfn nay c\u00f3 nhi\u1ec1u c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u trong v\u00e0 ngo\u00e0i n\u01b0\u1edbc nh\u1eb1m b\u1ea3o qu\u1ea3n k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a xo\u00e0i v\u00e0 thanh long nh\u01b0ng \u0111\u1ec3 kh\u1ecfi b\u1ecb t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh th\u1eddi gian b\u1ea3o qu\u1ea3n c\u1ee7a xo\u00e0i ch\u1ec9 k\u00e9o d\u00e0i t\u1ed1i \u0111a 28 ng\u00e0y \u1edf nhi\u1ec7t \u0111\u1ed9 &gt; 10 \u0111\u1ed9 C v\u00e0 th\u1eddi gian b\u1ea3o qu\u1ea3n thanh long ch\u1ec9 k\u00e9o d\u00e0i t\u1ed1i \u0111a 32 ng\u00e0y \u1edf nhi\u1ec7t \u0111\u1ed9 &gt; 8 \u0111\u1ed9 C.<\/p>\n\n\n\n<p><strong>Kh\u1ed1ng ch\u1ebf t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh<\/strong><\/p>\n\n\n\n<p>TS Tr\u1ea7n L\u00ea Quan cho bi\u1ebft, \u0111\u1ec3 k\u00e9o d\u00e0i th\u1eddi gian b\u1ea3o qu\u1ea3n xo\u00e0i v\u00e0 thanh long l\u00e2u h\u01a1n n\u1eefa c\u1ea7n ph\u1ea3i c\u00f3 bi\u1ec7n ph\u00e1p kh\u1ed1ng ch\u1ebf s\u1ef1 t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh. L\u00e0m sao \u0111\u1ec3 h\u1ea1 nhi\u1ec7t \u0111\u1ed9 b\u1ea3o qu\u1ea3n c\u1ee7a xo\u00e0i th\u1ea5p h\u01a1n 10 \u0111\u1ed9 C v\u00e0 thanh long th\u1ea5p h\u01a1n 8 \u0111\u1ed9 C. V\u1ec1 b\u1ea3n ch\u1ea5t, t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh n\u00e0y l\u00e0 do s\u1ef1 t\u0103ng ho\u1ea1t c\u1ee7a enzym peroxidase, invertase v\u00e0 cellulase tr\u00ean v\u1ecf qu\u1ea3 t\u01b0\u01a1i \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Ng\u01b0\u1eddi ta d\u00f9ng c\u00f4ng ngh\u1ec7 MAP v\u00e0 c\u00f4ng ngh\u1ec7 s\u1eed d\u1ee5ng ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng \u0111\u1ec3 kh\u1ed1ng ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c enzym m\u00e0u. C\u00f4ng ngh\u1ec7 MAP r\u1ea5t t\u1ed1n k\u00e9m kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi n\u1ec1n s\u1ea3n xu\u1ea5t nh\u1ecf. Do v\u1eady, nghi\u00ean c\u1ee9u ch\u1ecdn c\u00e1c ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng nh\u01b0 methyl jasmonate (MJ) tr\u00edch t\u1eeb tinh d\u1ea7u hoa l\u00e0i cho v\u00e0o m\u00e0ng b\u00e1n th\u1ea5m chitosan \u0111\u1ec3 h\u1ea1 nhi\u1ec7t \u0111\u1ed9 b\u1ea3o qu\u1ea3n c\u1ee7a xo\u00e0i \u0111\u1ebfn 5 &#8211; 7 \u0111\u1ed9 C v\u00e0 c\u1ee7a thanh long \u0111\u1ebfn 4 &#8211; 6 \u0111\u1ed9 C m\u00e0 kh\u00f4ng b\u1ecb t\u1ed5n th\u01b0\u01a1ng l\u1ea1nh \u0111\u1ec3 nh\u1edd \u0111\u00f3 c\u00f3 th\u1ec3 k\u00e9o d\u00e0i th\u1eddi gian b\u1ea3o qu\u1ea3n c\u1ee7a xo\u00e0i v\u00e0 thanh long \u0111\u1ebfn kho\u1ea3ng 40 ng\u00e0y.<\/p>\n\n\n\n<p>Quy tr\u00ecnh b\u1ea3o qu\u1ea3n xo\u00e0i v\u00e0 th\u00e0nh long nh\u01b0 sau: R\u1eeda s\u1ea1ch c\u00e1t \u0111\u1ea5t v\u00e0 c\u00f4n tr\u00f9ng d\u01b0\u1edbi v\u00f2i n\u01b0\u1edbc, sau \u0111\u00f3 nh\u00fang thanh long v\u00e0 xo\u00e0i trong n\u01b0\u1edbc n\u00f3ng 50 &#8211; 52 \u0111\u1ed9 C trong 15 ph\u00fat nh\u1eb1m b\u1ea5t ho\u1ea1t m\u1ed9t s\u1ed1 enzym catalase b\u00e1m tr\u00ean v\u1ecf, \u0111\u1ec3 r\u00e1o n\u01b0\u1edbc d\u01b0\u1edbi qu\u1ea1t gi\u00f3. Nh\u00fang ti\u1ebfp v\u00e0o b\u1ed3n ch\u1ee9a dung d\u1ecbch O3 100ppm trong 5 ph\u00fat v\u00e0 \u0111\u1ec3 hong kh\u00f4 d\u01b0\u1edbi qu\u1ea1t gi\u00f3 trong 30 ph\u00fat. Nh\u00fang ng\u1eadp tr\u00e1i thanh long v\u00e0 xo\u00e0i v\u00e0o dung d\u1ecbch chitosan trong 1 ph\u00fat, \u0111\u1ec3 hong kh\u00f4 d\u01b0\u1edbi qu\u1ea1t gi\u00f3 trong 1 gi\u1edd \u0111\u1ec3 cho m\u1eb7t thanh long v\u00e0 xo\u00e0i v\u1eeba kh\u00f4. Cho xo\u00e0i v\u00e0o t\u1ee7 l\u1ea1nh \u0111\u1ec3 b\u1ea3o qu\u1ea3n, \u0111i\u1ec1u ch\u1ec9nh \u1ea9m \u0111\u1ed9 90 &#8211; 95% v\u00e0 nhi\u1ec7t \u0111\u1ed9 5 &#8211; 7 \u0111\u1ed9 C, Cho thanh long v\u00e0o t\u1ee7 l\u1ea1nh \u0111\u1ec3 b\u1ea3o qu\u1ea3n, \u0111i\u1ec1u ch\u1ec9nh \u1ea9m \u0111\u1ed9 85 &#8211; 90% v\u00e0 nhi\u1ec7t \u0111\u1ed9 4 &#8211; 6 \u0111\u1ed9 C. \u0110\u1ec3 xen k\u1ebd l\u1edbp xo\u00e0i v\u1edbi t\u00fai ch\u1ee9a ch\u1ea5t kh\u1eed ethylen 1 t\u00fai\/1 kg xo\u00e0i&#8230; Chi ph\u00ed h\u00f3a ch\u1ea5t b\u1ea3o qu\u1ea3n cho 500kg xo\u00e0i l\u00e0 58.250\u0111 b\u1eb1ng chi ph\u00ed b\u1ea3o qu\u1ea3n thanh long<\/p>\n\n\n\n<p>TS Tr\u1ea7n L\u00ea Quan cho bi\u1ebft, xo\u00e0i v\u00e0 thanh long b\u1ea3o qu\u1ea3n theo quy tr\u00ecnh n\u00e0y, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd \u0111\u1ebfn kho\u1ea3ng 38 ng\u00e0y, sau \u0111\u00f3 \u0111\u01b0a ra ngo\u00e0i \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng trong 2 ng\u00e0y \u0111\u1ec3 ch\u00edn th\u01b0\u1eddng; t\u1ed5ng c\u1ed9ng l\u00e0 40 ng\u00e0y. Ki\u1ec3m tra h\u00e0m l\u01b0\u1ee3ng kim lo\u1ea1i n\u1eb7ng Pb, Cd, Hg, Zn, Cu, As, B, Sn theo TCVN, k\u1ebft qu\u1ea3 cho th\u1ea5y xo\u00e0i v\u00e0 thanh long th\u1eed nghi\u1ec7m \u0111\u1ea1t ti\u00eau chu\u1ea9n v\u1ec1 kim lo\u1ea1i n\u1eb7ng theo FAO\/WHO 1993. M\u1eadt \u0111\u1ed9 vi sinh v\u1eadt g\u00e2y b\u1ec7nh, d\u01b0 l\u01b0\u1ee3ng thu\u1ed1c b\u1ea3o v\u1ec7 th\u1ef1c v\u1eadt\u2026 \u0111\u1ec1u \u0111\u1ea3m b\u1ea3o an to\u00e0n theo ti\u00eau chu\u1ea9n c\u1ee7a B\u1ed9 Y t\u1ebf.<\/p>\n\n\n\n<p class=\"has-text-align-right\">                                                             <strong>B\u1ea2O KH\u00c1NH<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-right\"><a href=\"https:\/\/khoahocdoisong.vn\/bao-quan-xoai-thanh-long-tuoi-ngon-den-40-ngay-160382.html\">https:\/\/khoahocdoisong.vn\/bao-quan-xoai-thanh-long-tuoi-ngon-den-40-ngay-160382.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1eb1ng c\u00f4ng ngh\u1ec7 m\u00e0ng b\u00e1n th\u1ea5m, TS Tr\u1ea7n L\u00ea Quan \u0111\u00e3 \u00e1p d\u1ee5ng th\u00e0nh c\u00f4ng quy tr\u00ecnh b\u1ea3o qu\u1ea3n xo\u00e0i, thanh long t\u01b0\u01a1i ngon \u0111\u1ebfn 40 ng\u00e0y, \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u xu\u1ea5t kh\u1ea9u. Ch\u1ecdn c\u00f4ng ngh\u1ec7 t\u1ed1i \u01b0u \u0110\u1ec1 t\u00e0i \u201cNghi\u00ean c\u1ee9u ch\u1ebf t\u1ea1o&nbsp;m\u00e0ng b\u00e1n th\u1ea5m&nbsp;v\u00e0 ho\u00e0n thi\u1ec7n c\u00f4ng ngh\u1ec7 b\u1ea3o qu\u1ea3n xo\u00e0i v\u00e0 thanh [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":26516,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-26515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/26515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=26515"}],"version-history":[{"count":3,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/26515\/revisions"}],"predecessor-version":[{"id":30887,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/26515\/revisions\/30887"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/26516"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=26515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=26515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=26515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}