{"id":9446,"date":"2010-10-26T22:00:17","date_gmt":"2010-10-26T15:00:17","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2010\/10\/nghien-cuu-anh-huong-cua-nong-do-nhiet-do-thoi-gian-ngam-polyetylenglycol-peg-600-den-on-dinh-cua-go-mo-bien-tinh\/"},"modified":"2015-05-19T14:34:42","modified_gmt":"2015-05-19T07:34:42","slug":"nghien-cuu-anh-huong-cua-nong-do-nhiet-do-thoi-gian-ngam-polyetylenglycol-peg-600-den-on-dinh-cua-go-mo-bien-tinh","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nghien-cuu-anh-huong-cua-nong-do-nhiet-do-thoi-gian-ngam-polyetylenglycol-peg-600-den-on-dinh-cua-go-mo-bien-tinh\/","title":{"rendered":"Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a n\u1ed3ng \u0111\u1ed9, nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian ng\u00e2m polyetylenglycol (Peg-600) \u0111\u1ebfn \u1ed5n \u0111\u1ecbnh c\u1ee7a g\u1ed7 M\u1ee1 bi\u1ebfn t\u00ednh"},"content":{"rendered":"

\u0110\u00e0o Xu\u00e2n Thu<\/strong><\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/em><\/em><\/strong><\/p>\n

T\u00d3M T\u1eaeT<\/strong><\/p>\n

M\u1ee5c \u0111\u00edch c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y l\u00e0 t\u00ecm ra quan h\u1ec7 c\u1ee7a n\u1ed3ng \u0111\u1ed9, nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian ng\u00e2m c\u1ee7a PEG-600 \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a g\u1ed7 M\u1ee1 bi\u1ebfn t\u00ednh. T\u1eeb \u0111\u00f3 t\u00ecm ra th\u00f4ng s\u1ed1 t\u1ed1i \u01b0u c\u1ee7a: nhi\u1ec7t \u0111\u1ed9, th\u1eddi gian ng\u00e2m, n\u1ed3ng \u0111\u1ed9 PEG-600 \u0111\u1ec3 t\u1ea1o ra g\u1ed7 M\u1ee1 bi\u1ebfn t\u00ednh c\u00f3 t\u00ednh \u1ed5n \u0111\u1ecbnh cao.<\/p>\n

T\u1eeb kh\u00f3a:<\/strong> G\u1ed7 bi\u1ebfn t\u00ednh, G\u1ed7 M\u1ee1, PEG-600.<\/p>\n

\u0110\u1eb6T V\u1ea4N \u0110\u1ec0<\/strong><\/p>\n

\u1ede Vi\u1ec7t Nam hi\u1ec7n nay, g\u1ed7 r\u1eebng t\u1ef1 nhi\u00ean ng\u00e0y c\u00e0ng khan hi\u1ebfm trong khi nhu c\u1ea7u s\u1eed d\u1ee5ng g\u1ed7 c\u1ee7a x\u00e3 h\u1ed9i ng\u00e0y c\u00e0ng gia t\u0103ng. Do \u0111\u00f3, h\u01b0\u1edbng thay th\u1ebf g\u1ed7 t\u1ef1 nhi\u00ean b\u1eb1ng g\u1ed7 m\u1ecdc nhanh r\u1eebng tr\u1ed3ng v\u00e0 \u0111\u01b0a ra c\u00e1c c\u00f4ng ngh\u1ec7 t\u1ea1o ra c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u m\u1edbi l\u00e0 h\u01b0\u1edbng nghi\u00ean c\u1ee9u c\u1ea7n thi\u1ebft c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc ch\u1ebf bi\u1ebfn l\u00e2m s\u1ea3n. M\u1ed9t trong c\u00e1c h\u01b0\u1edbng \u0111\u00f3 l\u00e0 bi\u1ebfn t\u00ednh g\u1ed7. Bi\u1ebfn t\u00ednh g\u1ed7 l\u00e0 qu\u00e1 tr\u00ecnh t\u00e1c \u0111\u1ed9ng ho\u00e1 h\u1ecdc, c\u01a1 h\u1ecdc, nhi\u1ec7t h\u1ecdc ho\u1eb7c \u0111\u1ed3ng th\u1eddi l\u00e0m thay \u0111\u1ed5i l\u1ea1i c\u1ea5u tr\u00fac c\u1ee7a g\u1ed7 m\u00e0 ch\u1ee7 y\u1ebfu l\u00e0 t\u00e1c \u0111\u1ed9ng v\u00e0o c\u00e1c nh\u00f3m hydroxyl. Qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0m cho c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a g\u1ed7 thay \u0111\u1ed5i. Ch\u00ednh v\u00ec v\u1eady, nhi\u1ec1u n\u01b0\u1edbc tr\u00ean th\u1ebf gi\u1edbi \u0111\u00e3, \u0111ang v\u00e0 s\u1ebd c\u00f3 nh\u1eefng \u0111\u1ea7u t\u01b0 r\u1ea5t l\u1edbn theo h\u01b0\u1edbng bi\u1ebfn t\u00ednh g\u1ed7. \u1ede Vi\u1ec7t Nam, c\u00f4ng ngh\u1ec7 bi\u1ebfn t\u00ednh \u0111\u00e3 b\u1eaft \u0111\u1ea7u \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00e0 \u0111ang l\u00e0 l\u0129nh v\u1ef1c \u0111\u01b0\u1ee3c nhi\u1ec1u nh\u00e0 khoa h\u1ecdc quan t\u00e2m.G\u1ed7 M\u1ee1 l\u00e0 lo\u1ea1i c\u00e2y \u0111\u01b0\u1ee3c tr\u1ed3ng kh\u00e1 ph\u1ed5 bi\u1ebfn \u1edf mi\u1ec1n B\u1eafc Vi\u1ec7t nam. G\u1ed7 M\u1ee1 c\u00f3 \u01b0u \u0111i\u1ec3m: m\u1ecdc nhanh, d\u1ec5 gia c\u00f4ng c\u1eaft g\u1ecdt, m\u00e0u g\u1ed7 s\u00e1ng r\u1ea5t ph\u00f9 h\u1ee3p l\u00e0m nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh. Tuy nhi\u00ean, do \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a g\u1ed7 M\u1ee1 kh\u00f4ng cao n\u00ean h\u01b0\u1edbng nghi\u00ean c\u1ee9u bi\u1ebfn t\u00ednh g\u1ed7 \u0111\u1ec3 n\u00e2ng cao \u1ed5n \u0111\u1ecbnh c\u1ee7a g\u1ed7 M\u1ee1 l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a.<\/p>\n

V\u1eacT LI\u1ec6U V\u00c0 PH\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U<\/h1>\n

Nguy\u00ean li\u1ec7u d\u00f9ng trong th\u00ed nghi\u1ec7m<\/h1>\n

+ Nguy\u00ean li\u1ec7u g\u1ed7:<\/em><\/strong><\/em>G\u1ed7 d\u00f9ng trong th\u00ed nghi\u1ec7m l\u00e0 g\u1ed7 M\u1ee1 15 tu\u1ed5i. G\u1ed7 M\u1ee1 c\u00f3 t\u00ean khoa h\u1ecdc (Manglietia conifera<\/em>Dandy)\u0111\u01b0\u1ee3c l\u1ea5y v\u1ec1 t\u1eeb huy\u1ec7n H\u00e0m Y\u00ean, t\u1ec9nh Tuy\u00ean Quang.<\/p>\n

+ Ho\u00e1 ch\u1ea5t bi\u1ebfn t\u00ednh:<\/em><\/strong><\/p>\n

Ho\u00e1 ch\u1ea5t d\u00f9ng trong th\u00ed nghi\u1ec7m l\u00e0 polyetylenglycol (PEG-600) c\u00f3 c\u00f4ng th\u1ee9c c\u1ea5u t\u1ea1o: HO- CH2<\/sub>-(CH2<\/sub>-O-CH2<\/sub>)n<\/sub> \u2013CH2<\/sub>OH.<\/p>\n

+ Thi\u1ebft b\u1ecb th\u00ed nghi\u1ec7m:<\/em><\/strong><\/p>\n

S\u1eed d\u1ee5ngthi\u1ebft b\u1ecb t\u1ea1i Ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a Ph\u00f2ng Nghi\u00ean c\u1ee9u Ch\u1ebf bi\u1ebfn g\u1ed7 thu\u1ed9c Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam g\u1ed3m: C\u01b0a v\u00f2ng \u0111\u1ee9ng; C\u01b0a \u0111a n\u0103ng; Th\u01b0\u1edbc k\u1eb9p \u0111i\u1ec7n t\u1eed; C\u00e2n \u0111i\u1ec7n t\u1eed c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c 10-3<\/sup>; Thi\u1ebft b\u1ecb \u0111o \u0111\u1ed9 \u1ea9m; \u1ed0ng \u0111ong thu\u1ef7 tinh dung t\u00edch 500 ml, c\u00f3 v\u1ea1ch chia 1\/10 ml; \u1ed0ng \u0111ong thu\u1ef7 tinh chia c\u00f3 v\u1ea1ch chia 1\/10ml, dung t\u00edch 500ml d\u00f9ng \u0111\u1ec3 pha ho\u00e1 ch\u1ea5t; Thi\u1ebft b\u1ecb d\u00f9ng \u0111\u1ec3 ng\u00e2m t\u1ea9m m\u1eabu g\u1ed7 trong PEG; T\u1ee7 s\u1ea5y MEMBER (\u0110\u1ee9c): nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a 2000<\/sup>C, \u0111\u1ed9 nh\u1ea1y +<\/span> 0,10<\/sup>C d\u00f9ng \u0111\u1ec3 s\u1ea5y m\u1eabu.<\/p>\n

(Trang 1215-1120)<\/p>\n","protected":false},"excerpt":{"rendered":"

\n\u1ede Vi\u1ec7t Nam hi\u1ec7n nay, g\u1ed7 r\u1eebng t\u1ef1 nhiên ngày càng khan hi\u1ebfm trong khi nhu c\u1ea7u s\u1eed d\u1ee5ng g\u1ed7 c\u1ee7a xã h\u1ed9i ngày càng gia t\u0103ng. Do \u0111ó, h\u01b0\u1edbng thay th\u1ebf g\u1ed7 t\u1ef1 nhiên b\u1eb1ng g\u1ed7 m\u1ecdc nhanh r\u1eebng tr\u1ed3ng và \u0111\u01b0a ra các công ngh\u1ec7 t\u1ea1o ra các lo\u1ea1i v\u1eadt li\u1ec7u m\u1edbi là h\u01b0\u1edbng nghiên c\u1ee9u c\u1ea7n thi\u1ebft c\u1ee7a các nhà khoa h\u1ecdc ch\u1ebf bi\u1ebfn lâm s\u1ea3n. M\u1ed9t trong các h\u01b0\u1edbng \u0111ó là bi\u1ebfn tính g\u1ed7. Bi\u1ebfn tính g\u1ed7 là quá trình tác \u0111\u1ed9ng hoá h\u1ecdc, c\u01a1 h\u1ecdc, nhi\u1ec7t h\u1ecdc ho\u1eb7c \u0111\u1ed3ng th\u1eddi làm thay \u0111\u1ed5i l\u1ea1i c\u1ea5u trúc c\u1ee7a g\u1ed7 mà ch\u1ee7 y\u1ebfu là tác \u0111\u1ed9ng vào các nhóm hydroxyl. Quá trình này làm cho các tính ch\u1ea5t c\u1ee7a g\u1ed7 thay \u0111\u1ed5i. <\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9446"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=9446"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9446\/revisions"}],"predecessor-version":[{"id":15280,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9446\/revisions\/15280"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9446"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9446"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9446"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}