Trong cu\u1ed9c s\u1ed1ng, ch\u1eafc b\u1ea1n th\u1ea5y nhi\u1ec1u lo\u1ea1i qu\u1ea3 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m chung l\u00e0: qu\u1ea3 xanh v\u1eeba chua, v\u1eeba c\u1ee9ng, v\u1eeba ch\u00e1t. Th\u1ebf nh\u01b0ng qu\u1ea3 ch\u00edn l\u1ea1i v\u1eeba ng\u1ecdt, v\u1eeba m\u1ec1m v\u1eeba th\u01a1m, v\u00ec sao v\u1eady? Nguy\u00ean do l\u00e0 khi qu\u1ea3 ch\u00edn \u0111\u00e3 x\u1ea3y ra m\u1ed9t lo\u1ea1t bi\u1ebfn \u0111\u1ed5i ho\u00e1 h\u1ecdc.<\/p>\n\n\n\n
Trong qu\u1ea3 xanh, c\u00e1c lo\u1ea1i axit h\u1eefu c\u01a1 h\u00e0m l\u01b0\u1ee3ng r\u1ea5t cao. Nh\u01b0 trong qu\u1ea3 nho xanh c\u00f3 ch\u1ee9a nhi\u1ec1u axit tactric, axit xitric, axit axetic\u2026 Khi qu\u1ea3 ch\u00edn, c\u00e1c axit h\u1eefu c\u01a1 b\u1ecb c\u00e1c ch\u1ea5t ki\u1ec1m trung ho\u00e0 d\u1ea7n, ho\u1eb7c t\u00e1c d\u1ee5ng v\u1edbi c\u00e1c lo\u1ea1i r\u01b0\u1ee3u trong qu\u1ea3 \u0111\u1ec3 t\u1ea1o n\u00ean c\u00e1c este, do \u0111\u00f3 n\u1ed3ng \u0111\u1ed9 axit b\u1ecb gi\u1ea3m. \u0110\u1ed3ng th\u1eddi h\u00e0m l\u01b0\u1ee3ng \u0111\u01b0\u1eddng trong qu\u1ea3 c\u0169ng t\u0103ng d\u1ea7n. Nh\u1edd \u0111\u00f3 tr\u00e1i c\u00e2y chuy\u1ec3n t\u1eeb chua sang ng\u1ecdt.<\/p>\n\n\n\n
Qu\u1ea3 xanh h\u01a1i c\u1ee9ng v\u00ec trong qu\u1ea3 xanh c\u00f3 nhi\u1ec1u nh\u1ef1a, \u0111a s\u1ed1 c\u00e1c lo\u1ea1i nh\u1ef1a n\u00e0y kh\u00f4ng tan trong n\u01b0\u1edbc l\u00e0m cho qu\u1ea3 xanh v\u1eeba c\u1ee9ng v\u1eeba gi\u00f2n. Th\u1ebf nh\u01b0ng trong qu\u00e1 tr\u00ecnh ch\u00edn, c\u00e1c lo\u1ea1i nh\u1ef1a n\u00e0y d\u1ea7n d\u1ea7n chuy\u1ec3n ho\u00e1 v\u00e0 d\u1ea7n d\u1ea7n ho\u00e0 tan trong n\u01b0\u1edbc, nh\u1edd \u0111\u00f3 m\u00e0 qu\u1ea3 c\u00e2y tr\u1edf n\u00ean m\u1ec1m. C\u00e1c lo\u1ea1i qu\u1ea3 nh\u01b0 h\u1ed3ng h\u1ea1nh, chu\u1ed1i, \u0111\u00e0o \u0111\u1ec1u gi\u1ed1ng nh\u01b0 v\u1eady v\u00e0 chuy\u1ec3n t\u1eeb c\u1ee9ng th\u00e0nh m\u1ec1m.<\/p>\n\n\n\n
C\u00f2n v\u1ec1 v\u1ecb ch\u00e1t. Qu\u1ea3 ch\u00e1t ch\u1ee7 y\u1ebfu do c\u00f3 nhi\u1ec1u axit tanic. Khi qu\u1ea3 ch\u00edn th\u00ec ph\u1ea7n l\u1edbn axit tanic b\u1ecb oxy ho\u00e1 n\u00ean qu\u1ea3 h\u1ebft v\u1ecb ch\u00e1t. H\u1ed3ng l\u00e0 \u0111i\u1ec3n h\u00ecnh cho qu\u00e1 tr\u00ecnh n\u00e0y.<\/p>\n\n\n\n
Qu\u1ea3 ch\u00edn c\u00f3 nhi\u1ec1u \u0111\u01b0\u1eddng. \u0110\u01b0\u1eddng trong qu\u1ea3 ch\u00edn c\u00f3 th\u1ec3 b\u1ecb l\u00ean men bi\u1ebfn th\u00e0nh r\u01b0\u1ee3u. R\u01b0\u1ee3u g\u1eb7p axit h\u1eefu c\u01a1 l\u1ea1i x\u1ea3y ra ph\u1ea3n \u1ee9ng este ho\u00e1 t\u1ea1o th\u00e0nh c\u00e1c este, \u0111a s\u1ed1 c\u00e1c este c\u00f3 m\u00f9i th\u01a1m d\u1ec5 ch\u1ecbu nh\u01b0 axetat etyl, axetat amyl, benzoat etyl\u2026. l\u00e0m cho qu\u1ea3 ch\u00edn m\u00f9i r\u1ea5t h\u1ea5p d\u1eabn.<\/p>\n\n\n\n
Th\u01b0\u1eddng th\u00ec qu\u1ea3 xanh c\u00f3 m\u00e0u xanh, v\u00ec trong qu\u1ea3 xanh c\u00f3 nhi\u1ec1u ch\u1ea5t di\u1ec7p l\u1ee5c. Trong qu\u00e1 tr\u00ecnh ch\u00edn, ch\u1ea5t di\u1ec7p l\u1ee5c s\u1ebd b\u1ecb ph\u00e2n hu\u1ef7, v\u00e0 xu\u1ea5t hi\u1ec7n nhi\u1ec1u s\u1eafc t\u1ed1 m\u1edbi thay th\u1ebf. Qu\u1ea3 c\u00e0 chua bi\u1ebfn t\u1eeb m\u00e0u xanh th\u00e0nh \u0111\u1ecf ch\u00ednh l\u00e0 \u0111\u00e3 sinh ra s\u1eafc t\u1ed1 m\u00e0u \u0111\u1ecf thay m\u00e0u xanh.<\/p>\n\n\n\n
Qu\u1ea3 t\u1eeb xanh \u0111\u1ebfn ch\u00edn l\u00e0 m\u1ed9t s\u1ef1 vi\u1ec7c b\u00ecnh th\u01b0\u1eddng nh\u01b0ng \u0111\u00e3 x\u1ea3y ra bao nhi\u00eau l\u00e0 ph\u1ea3n \u1ee9ng ho\u00e1 h\u1ecdc, ch\u1ec9 c\u1ea7n b\u1ea1n l\u01b0u t\u00e2m, l\u00e0 c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y. Trong cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y qu\u1ea3 l\u00e0 c\u00f3 nhi\u1ec1u s\u1ef1 vi\u1ec7c c\u00f3 li\u00ean quan \u0111\u1ebfn c\u00e1c qu\u00e1 tr\u00ecnh ho\u00e1 h\u1ecdc.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Hoa qu\u1ea3; Qu\u1ea3 ch\u00edn.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Trong cu\u1ed9c s\u1ed1ng, ch\u1eafc b\u1ea1n th\u1ea5y nhi\u1ec1u lo\u1ea1i qu\u1ea3 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m chung l\u00e0: qu\u1ea3 xanh v\u1eeba chua, v\u1eeba c\u1ee9ng, v\u1eeba ch\u00e1t. Th\u1ebf nh\u01b0ng qu\u1ea3 ch\u00edn l\u1ea1i v\u1eeba ng\u1ecdt, v\u1eeba m\u1ec1m v\u1eeba th\u01a1m, v\u00ec sao v\u1eady? Nguy\u00ean do l\u00e0 khi qu\u1ea3 ch\u00edn \u0111\u00e3 x\u1ea3y ra m\u1ed9t lo\u1ea1t bi\u1ebfn \u0111\u1ed5i ho\u00e1 h\u1ecdc. Trong qu\u1ea3 xanh, c\u00e1c […]<\/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-8094","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\/8094","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=8094"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/8094\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=8094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=8094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=8094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}