Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m ki\u1ec3u c\u0169 l\u00e0 \u0111\u1eb7t th\u1ef1c ph\u1ea9m v\u00e0o t\u1ee7 l\u1ea1nh ho\u1eb7c h\u1ea7m ng\u1ea7m \u0111\u1ec3 ph\u00f2ng ng\u1eeba ch\u00fang b\u1ecb th\u1ed1i h\u1ecfng. B\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m theo c\u00e1ch n\u00e0y, th\u1eddi gian b\u1ea3o qu\u1ea3n n\u00f3i chung kh\u00f4ng d\u00e0i. V\u00ec th\u1eddi gian d\u00e0i ra, c\u00e1c vi sinh v\u1eadt \u1ea9n n\u00e1u trong th\u1ef1c ph\u1ea9m, trong \u0111i\u1ec1u ki\u1ec7n th\u00edch h\u1ee3p l\u1ea1i s\u1ebd sinh s\u00f4i ho\u1ea1t \u0111\u1ed9ng, ph\u00e2n gi\u1ea3i ch\u1ea5t dinh d\u01b0\u1ee1ng trong th\u1ef1c ph\u1ea9m, ti\u1ebft ra dung m\u00f4i v\u00e0 v\u1eadt ch\u1ea5t c\u00f3 \u0111\u1ed9c t\u00ednh, c\u00f3 th\u1ec3 l\u00e0m cho th\u1ef1c ph\u1ea9m b\u1ecb th\u1ed1i r\u1eefa bi\u1ebfn ch\u1ea5t.<\/p>\n\n\n\n
Li\u1ec7u c\u00f3 c\u00e1ch g\u00ec l\u00e0m cho th\u1ef1c ph\u1ea9m b\u1ea3o qu\u1ea3n \u0111\u01b0\u1ee3c trong th\u1eddi gian t\u01b0\u01a1ng \u0111\u1ed1i d\u00e0i m\u00e0 kh\u00f4ng x\u1ea3y ra th\u1ed1i r\u1eefa bi\u1ebfn ch\u1ea5t kh\u00f4ng?<\/p>\n\n\n\n
Hi\u1ec7n nay, ng\u01b0\u1eddi ta \u0111\u00e3 t\u00ecm \u0111\u01b0\u1ee3c m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u1edbi, c\u00f3 th\u1ec3 b\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m d\u00e0i ng\u00e0y m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn ch\u1ea5t. \u0110\u00f3 l\u00e0 c\u00e1ch d\u00f9ng tia chi\u1ebfu x\u1ea1 v\u00e0o th\u1ef1c ph\u1ea9m.<\/p>\n\n\n\n
B\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m b\u1eb1ng tia chi\u1ebfu x\u1ea1 l\u00e0 \u00e1p d\u1ee5ng ch\u1ea5t \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 coban-60 v\u00e0 tia \u03b3 do xesi-137 b\u1ee9c x\u1ea1 ra, ho\u1eb7c l\u00e0 d\u00f9ng ch\u00f9m electron c\u1ee7a m\u00e1y gia t\u1ed1c. N\u0103ng l\u01b0\u1ee3ng c\u1ee7a lo\u1ea1i tia n\u00e0y cao kinh kh\u1ee7ng, n\u0103ng l\u1ef1c xuy\u00ean th\u1ea5u h\u1ebft s\u1ee9c m\u1ea1nh, c\u00f3 th\u1ec3 chi\u1ebfu x\u1ea1 qua l\u1edbp trong l\u1edbp ngo\u00e0i c\u1ee7a th\u1ef1c ph\u1ea9m. Khi chi\u1ebfu x\u1ea1, tia \u03b3 s\u1ebd b\u1ecb nguy\u00ean t\u1eed, ph\u00e2n t\u1eed c\u1ee7a vi sinh v\u1eadt h\u1ea5p thu, sinh ra m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c electron chuy\u1ec3n \u0111\u1ed9ng. Nh\u1eefng electron n\u00e0y l\u1ea1i c\u00f3 th\u1ec3 th\u00fac \u0111\u1ea9y nguy\u00ean t\u1eed, ph\u00e2n t\u1eed trong vi sinh v\u1eadt ion ho\u00e1, qua \u0111\u00f3 m\u00e0 gi\u1ebft s\u1ea1ch ch\u00fang. Cho n\u00ean, th\u1ef1c ph\u1ea9m m\u1ed9t khi tr\u1ea3i qua chi\u1ebfu x\u1ea1, t\u00e1c d\u1ee5ng di\u1ec7t khu\u1ea9n h\u1ebft s\u1ee9c tri\u1ec7t \u0111\u1ec3, c\u00f3 th\u1ec3 b\u1ea3o qu\u1ea3n l\u00e2u d\u00e0i, s\u1ebd kh\u00f4ng x\u1ea3y ra th\u1ed1i r\u1eefa, bi\u1ebfn ch\u1ea5t.<\/p>\n\n\n\n
D\u00f9ng tia chi\u1ebfu x\u1ea1 c\u00f2n c\u00f3 m\u1ed9t \u01b0u \u0111i\u1ec3m m\u00e0 nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c kh\u00f4ng sao s\u00e1nh n\u1ed5i: khi chi\u1ebfu x\u1ea1, tuy s\u1ee9c xuy\u00ean th\u1ea5u c\u1ee7a tia v\u00f4 c\u00f9ng m\u1ea1nh, nh\u01b0ng s\u1ef1 bi\u1ebfn \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9 c\u1ee7a b\u1ea3n th\u00e2n th\u1ef1c ph\u1ea9m l\u1ea1i r\u1ea5t nh\u1ecf b\u00e9. \u0110i\u1ec1u \u0111\u00f3 l\u00e0m cho ch\u1ea5t dinh d\u01b0\u1ee1ng v\u00e0 m\u00f9i v\u1ecb v\u1ed1n c\u00f3 c\u1ee7a th\u1ef1c ph\u1ea9m \u0111\u1ec1u c\u00f3 th\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c, cho n\u00ean r\u1ea5t \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: B\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m; Ch\u1ea5t \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1; Tia \u03b3.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ph\u01b0\u01a1ng ph\u00e1p b\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m ki\u1ec3u c\u0169 l\u00e0 \u0111\u1eb7t th\u1ef1c ph\u1ea9m v\u00e0o t\u1ee7 l\u1ea1nh ho\u1eb7c h\u1ea7m ng\u1ea7m \u0111\u1ec3 ph\u00f2ng ng\u1eeba ch\u00fang b\u1ecb th\u1ed1i h\u1ecfng. B\u1ea3o qu\u1ea3n th\u1ef1c ph\u1ea9m theo c\u00e1ch n\u00e0y, th\u1eddi gian b\u1ea3o qu\u1ea3n n\u00f3i chung kh\u00f4ng d\u00e0i. V\u00ec th\u1eddi gian d\u00e0i ra, c\u00e1c vi sinh v\u1eadt \u1ea9n n\u00e1u trong th\u1ef1c ph\u1ea9m, trong […]<\/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":[15,7],"tags":[],"class_list":["post-5820","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5820","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=5820"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/5820\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=5820"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=5820"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=5820"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}