{"id":13877,"date":"2022-01-20T21:54:45","date_gmt":"2022-01-20T21:54:45","guid":{"rendered":"https:\/\/cafesantahelena.alivanstudio.com\/what-is-the-maillard-reaction-in-roasting-coffee\/"},"modified":"2024-11-13T19:41:10","modified_gmt":"2024-11-13T19:41:10","slug":"what-is-the-maillard-reaction-in-roasting-coffee","status":"publish","type":"post","link":"https:\/\/cafesantahelena.com\/fr\/what-is-the-maillard-reaction-in-roasting-coffee\/","title":{"rendered":"Qu\u2019est-ce que la R\u00e9action de Maillard Dans la Torr\u00e9faction du Caf\u00e9?"},"content":{"rendered":"

La r\u00e9action de Maillard<\/strong> dans le caf\u00e9 est un processus de caram\u00e9lisation au cours duquel les sucres se combinent aux acides amin\u00e9s, aux peptides et aux prot\u00e9ines \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es.
\nCe processus est tr\u00e8s important pour la qualit\u00e9 finale du caf\u00e9. C’est par lui que le grain acquiert sa couleur brune et ses ar\u00f4mes caract\u00e9ristiques.<\/p>\n

Cette r\u00e9action a \u00e9t\u00e9 d\u00e9crite pour la premi\u00e8re fois par le chimiste fran\u00e7ais Louis Camille Maillard en 1912<\/b>. Dans cette r\u00e9action se produit \u00e9galement la formation de compos\u00e9s volatils responsables de l’ar\u00f4me. Lorsque les glucides et les acides amin\u00e9s sont d\u00e9compos\u00e9s, des compos\u00e9s de couleur sombre appel\u00e9s mallo\u00efdes<\/b> se forment.<\/p>\n

 <\/p>\n

Processus de Torr\u00e9faction <\/strong><\/span><\/p>\n

La torr\u00e9faction du caf\u00e9 vert<\/b> a lieu \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 180c, o\u00f9 les saveurs et les ar\u00f4mes se d\u00e9veloppent. Des changements structurels se produisent \u00e9galement dans le grain, impliquant de nombreuses interactions entre les compos\u00e9s.<\/p>\n

Pendant la torr\u00e9faction, la chaleur du torr\u00e9facteur est transf\u00e9r\u00e9e aux grains. Avec l’augmentation interne de la temp\u00e9rature, l’\u00e9vaporation de l’humidit\u00e9 des grains se produit dans un processus appel\u00e9 endothermique<\/b>. Avec l’augmentation de la temp\u00e9rature, des r\u00e9actions exothermiques<\/b> se produisent, en m\u00eame temps que la formation de compos\u00e9s volatils et de CO2. Lorsque la pression interne augmente, les grains se dilatent, provoquant de petites fissures dans leurs parois. Cet \u00e9v\u00e9nement est appel\u00e9 Crack.<\/b><\/p>\n

 <\/p>\n

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Changements physico-chimiques<\/strong><\/span><\/h3>\n

Le processus de torr\u00e9faction<\/b>, qui est tr\u00e8s complexe, implique des r\u00e9actions chimiques et physiques<\/b>. Ces r\u00e9actions se produisent \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 200\u00b0C. Changements chimiques.<\/p>\n

Le principal hydrate de carbone<\/b> pr\u00e9sent dans les grains verts est le saccharose<\/b>. Pendant la torr\u00e9faction, le saccharose est d\u00e9grad\u00e9 et une petite quantit\u00e9 reste dans le grain torr\u00e9fi\u00e9. Ce saccharose r\u00e9siduel subit un processus de pyrolyse<\/b> (d\u00e9composition des mat\u00e9riaux par l’action de hautes temp\u00e9ratures. La rupture de la structure mol\u00e9culaire du grain se produit sous l’action de la chaleur), et de caram\u00e9lisation<\/b>. Il est ensuite hydrolys\u00e9 en glucose et fructose<\/b>, dans le cadre de la r\u00e9action<\/b> de Maillard<\/b>, qui donne au caf\u00e9 sa couleur et sa saveur. D’autres compos\u00e9s qui se transforment \u00e9galement sont les acides chlorog\u00e9niques, les lipides et d’autres compos\u00e9s azot\u00e9s.<\/b><\/p>\n

Changements physiques<\/strong><\/h4>\n

Le changement physique commence par la couleur du grain, qui passe du vert au brun<\/b>. Cette couleur d\u00e9pend du point de torr\u00e9faction choisi. Avec la d\u00e9shydratation et la pyrolyse<\/b>, le grain subit une perte de masse de 14% \u00e0 20%. Plus la torr\u00e9faction est fonc\u00e9e, plus la perte est importante. G\u00e9n\u00e9ralement, dans les torr\u00e9factions moyennes, la perte est de 15%.<\/p>\n

1kg de caf\u00e9 vert = 850g de caf\u00e9 torr\u00e9fi\u00e9.<\/b><\/p>\n

Un autre changement est l’augmentation des grains due \u00e0 la formation de CO2 \u00e0 partir de la vapeur et des compos\u00e9s volatils. Le volume des grains peut atteindre 40% de plus, tandis que la densit\u00e9 diminue. Des cytoplasmes (porosit\u00e9s)<\/b> se forment \u00e9galement o\u00f9 s’installent les compos\u00e9s responsables de la saveur, les glucides, les lipides, les prot\u00e9ines, les min\u00e9raux et les acides caf\u00e9ine et chlorog\u00e8ne.<\/b><\/p>\n

Des \u00e9tudes sugg\u00e8rent que les antioxydants pr\u00e9sents dans le caf\u00e9 pourraient \u00eatre li\u00e9s \u00e0 la caf\u00e9ine ou \u00e0 l’acide chlorog\u00e9nique <\/b>pr\u00e9sents dans les grains verts. Mais les \u00e9tudes montrent que la r\u00e9action de Maillard est la principale source d’antioxydants. <\/b>D’autre part, les grains de caf\u00e9 perdent 90% de l’acide chlorog\u00e9nique au cours du processus de torr\u00e9faction.<\/b><\/p>\n

C’est pourquoi l’infusion de caf\u00e9 vert est connue pour sa forte teneur en acide chlorog\u00e9nique et ses bienfaits!<\/strong><\/p>\n

Essayez notre infusion de caf\u00e9 vert ou notre caf\u00e9 \u00e0 torr\u00e9faction moyenne!<\/strong><\/em><\/span><\/p>\n

\n\"\"<\/a><\/p>\n

\"\"<\/p>\n

\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

La r\u00e9action de Maillard dans le caf\u00e9 est un processus de caram\u00e9lisation au cours duquel les sucres se combinent aux acides amin\u00e9s, aux peptides et aux prot\u00e9ines \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es. Ce processus est tr\u00e8s important pour la qualit\u00e9 finale du caf\u00e9. C’est par lui que le grain acquiert sa couleur brune et ses ar\u00f4mes […]<\/p>\n","protected":false},"author":1,"featured_media":14009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66],"tags":[],"class_list":["post-13877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"\nWhat is Maillard reaction in roasting coffee-Caf\u00e9 Santa Helena<\/title>\n<meta name=\"description\" content=\"The Maillard reaction in coffee is a caramelization process in which sugars combine with amino acids and peptides under high temperatures.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cafesantahelena.com\/fr\/what-is-the-maillard-reaction-in-roasting-coffee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta 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