{"id":283282,"date":"2026-06-15T00:36:52","date_gmt":"2026-06-15T00:36:52","guid":{"rendered":"http:\/\/6a2f1ec6a6fbd03b34706385"},"modified":"2026-06-15T00:36:52","modified_gmt":"2026-06-15T00:36:52","slug":"inventan-metodo-para-preparar-cafe-que-prescinde-de-agua-caliente","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=283282","title":{"rendered":"Inventan m\u00e9todo para preparar caf\u00e9 que prescinde de agua caliente"},"content":{"rendered":"<p>\u00bfQu\u00e9 necesitas para preparar un buen caf\u00e9 espresso? Caf\u00e9 molido, por supuesto; una m\u00e1quina capaz de generar presi\u00f3n; y agua caliente, de preferencia a una temperatura entre 90 y 96 \u00b0C. Y eso es todo. \u00bfPero ser\u00e1 que podamos prescindir de este \u00faltimo elemento? No, no del agua, pero s\u00ed el tener que calentarla.<\/p>\n<p>Francisco Trujillo, un cient\u00edfico colombiano, encabez\u00f3 un equipo de la Universidad de Nueva Gales del Sur (en Australia) que se jacta de haber inventado lo que llaman \u201cel espresso ultras\u00f3nico\u201d. Seg\u00fan explic\u00f3 el doctor Trujillo, se trata de \u201cun proceso de preparaci\u00f3n a temperatura ambiente que utiliza ondas sonoras de alta frecuencia para extraer el sabor, los aceites, el aroma y la cafe\u00edna del caf\u00e9 molido\u201d.<\/p>\n<p>Aunque el proceso toma m\u00e1s tiempo que el m\u00e9todo convencional (tres minutos <em>versus<\/em> treinta segundos), consume 75% menos energ\u00eda, un considerable beneficio para cafeter\u00edas y restaurantes, pero sobre todo para negocios que producen cantidades industriales de caf\u00e9, por ejemplo, en productos listos para beber.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"20.792507204611\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"caf\u00e9 beneficios estudio\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/69ee708f5dd7c566e8d63959\/master\/w_120,c_limit\/cafetaza.jpg 120w, https:\/\/media.es.wired.com\/photos\/69ee708f5dd7c566e8d63959\/master\/w_240,c_limit\/cafetaza.jpg 240w, https:\/\/media.es.wired.com\/photos\/69ee708f5dd7c566e8d63959\/master\/w_320,c_limit\/cafetaza.jpg 320w, https:\/\/media.es.wired.com\/photos\/69ee708f5dd7c566e8d63959\/master\/w_640,c_limit\/cafetaza.jpg 640w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/69ee708f5dd7c566e8d63959\/master\/w_775%2Cc_limit\/cafetaza.jpg\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"22.391930835735\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs fUtEc dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco gAoKdC hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/tomar-cafe-altera-tu-flora-intestinal-te-pone-de-buenas-y-reduce-la-percepcion-de-estres-un-nuevo-estudio-averigua-como\" data-testid=\"ContentCardEmbedHedLink\">Tomar caf\u00e9 altera tu flora intestinal, te pone de buenas y reduce la percepci\u00f3n de estr\u00e9s; un nuevo estudio averigua c\u00f3mo<\/a><\/div>\n<p>\u00abEl caf\u00e9 es m\u00e1s que cafe\u00edna\u00bb. Un estudio muestra los mecanismos de c\u00f3mo el caf\u00e9 modifica la microbiota, reduce inflamaci\u00f3n e influye en el estado de \u00e1nimo. Incluso el caf\u00e9 descafeinado tiene sus propios beneficios.<\/p>\n<\/div>\n<\/div>\n<hr>\n<h2>\u00bfC\u00f3mo funciona?<\/h2>\n<p>El sistema experimental introduce ondas ultras\u00f3nicas directamente en el filtro donde se encuentran los granos molidos. En lugar de depender del calor, la tecnolog\u00eda aprovecha un fen\u00f3meno conocido como cavitaci\u00f3n ac\u00fastica, el cual consiste en la formaci\u00f3n y colapso de diminutas burbujas que generan microcorrientes y facilitan la extracci\u00f3n de los <a href=\"https:\/\/es.wired.com\/articulos\/estos-matematicos-han-encontrado-la-ecuacion-del-cafe-perfecto\">compuestos solubles del caf\u00e9<\/a>.<\/p>\n<p>Para hacer esto, los cient\u00edficos redise\u00f1aron un dispositivo capaz de transmitir las vibraciones ultras\u00f3nicas a toda la canasta del portafiltro, transform\u00e1ndola en una especie de reactor ac\u00fastico. Esto permite que las ondas se propaguen desde varios puntos simult\u00e1neamente y aceleren el movimiento de los l\u00edquidos alrededor de las part\u00edculas de caf\u00e9. \u201cEn otras palabras, el ultrasonido nos ayuda a reemplazar el calor con energ\u00eda mec\u00e1nica\u201d, <a data-offer-url=\"https:\/\/theconversation.com\/i-used-sound-waves-to-make-espresso-it-could-cut-coffee-brewing-energy-use-by-75-284929\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/theconversation.com\/i-used-sound-waves-to-make-espresso-it-could-cut-coffee-brewing-energy-use-by-75-284929&quot;}\" href=\"https:\/\/theconversation.com\/i-used-sound-waves-to-make-espresso-it-could-cut-coffee-brewing-energy-use-by-75-284929\" rel=\"nofollow noopener\" target=\"_blank\">explic\u00f3 Trujillo<\/a>.<\/p>\n<p>La idea de todo este proceso, descrito con mayor detalle en <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0260877426002311?via%3Dihub\">la edici\u00f3n de este mes<\/a> de la revista <em>Journal of Food Engineering<\/em>, es alcanzar una concentraci\u00f3n comparable a la de un espresso. Para lograrlo, los investigadores ajustaron variables como el tama\u00f1o de la molienda, la potencia del ultrasonido y el tiempo de preparaci\u00f3n. Con una molienda final y una potencia de 100 vatios, obtuvieron bebidas con niveles de s\u00f3lidos disueltos y rendimientos de extraccion equivalentes a los considerados ideales por la Specialty Coffee Association.<\/p>\n<p>Cuando se repitieron los experimentos en las mismas condiciones, pero sin aplicar ultrasonido, no fue posible alcanzar estos valores. El sistema ac\u00fastico permiti\u00f3 producir un caf\u00e9 de intensidad similar a la del espresso en unos cuantos minutos (\u00abdescubrimos que el punto \u00f3ptimo era de entre dos minutos y medio y tres minutos\u00bb), utilizando agua a temperatura ambiente.<\/p>\n<p>El equipo tambi\u00e9n analiz\u00f3 diversos par\u00e1metros qu\u00edmicos. Las concentraciones de cafe\u00edna y \u00e1cido clorog\u00e9nico fueron similares a las obtenidas por m\u00e9todos convencionales. Tampoco se observaron diferencias significativas en el pH ni en la composici\u00f3n general de los compuestos vol\u00e1tiles responsables del aroma.<\/p>\n<figure data-testid=\"IframeEmbed\" class=\"IframeEmbedWrapper-sc-fixZhC fJBrNq iframe-embed\"><\/figure>\n<h2>\u00bfUn consumidor notar\u00eda la diferencia?<\/h2>\n<p>Para averiguarlo, 100 personas participaron en pruebas sensoriales en las que compararon el espresso ultras\u00f3nico con el espresso convencional. A final de cuentas, los participantes no mostraron una preferencia notable por ninguno de los dos m\u00e9todos. Los puntajes de aroma, sabor, amargor y aceptaci\u00f3n general fueron pr\u00e1cticamente equivalentes.<\/p>\n<p>Tambi\u00e9n compararon caf\u00e9 filtrado preparado con el m\u00e9todo convencional y con ultrasonido. \u201cEn el caso del caf\u00e9 filtrado, la versi\u00f3n procesada por ultrasonidos fue la preferida en general, y los participantes calificaron su amargor como m\u00e1s agradable\u201d, apunt\u00f3 Trujillo.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00bfQu\u00e9 necesitas para preparar un buen caf\u00e9&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":283283,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[46],"tags":[],"class_list":["post-283282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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