![\"16-03-02](\"http:\/\/agora.xtec.cat\/iesnarcisoller\/wp-content\/uploads\/usu162\/2016\/03\/16-03-02-Xerrada-perfums-aromes-i-sabors-Joan-Carles-Ronda-04.jpg\")
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<\/a><\/p>\nLa xerrada girava entorn la necessitat de comprendre la influ\u00e8ncia que sobre la nostra vida exerceixen mol\u00e8cules de diferents subst\u00e0ncies les quals, en acoblar-se o no a diferents receptors sensorials, poden fer que un aliment resulti agradable, o amarg, una olor, sensual o indesitjable.<\/p>\n
Aix\u00ed doncs, colors, olors i sabors influencien la nostra vida i la ci\u00e8ncia estudia el medi natural per tal de fabricar sint\u00e8ticament aromes o sabors o millorar el tractament de plagues en cultius, per exemple,\u00a0 a partir de subst\u00e0ncies extretes de la natura, que es requeririen en quantitats desorbitades, com les subst\u00e0ncies que fan olors i es fan servir per fer col\u00f2nies o perfums. Estudiant les feromones de determinats insectes, es pot minimitzar, per exemple, l’\u00fas de pesticides actuant sobre uns insectes en concret que poden representar algun tipus de plaga.<\/p>\n
Una curiositat que va explicar el conferenciant va ser que per extreure aroma natural de gessam\u00ed caldrien 7milions de p\u00e8tals secs per produir tan sols 1kg d’oli essencial valorat en 4100\u20ac. Molt semblant pel que fa\u00a0 a l’aroma de roses, per a la qual caldrien 4500Kg de p\u00e8tals per obtenir-ne tan sols 1 kg. Avui en dia la ci\u00e8ncia \u00e9s capa\u00e7 de reproduir mol\u00e8cules que facin la mateixa olor que el gessam\u00ed, les roses, les maduixes, o produeixin el mateix poder atractiu, per exemple, que les feromones d’alguns insectes. La pregunta \u00e9s si es podr\u00e0 fer un perfum amb feromones humanes que ens facin qu\u00edmicament irresistibles. De moment, per sort, segurament, aix\u00f2 encara no s’ha pogut reproduir.<\/p>\n","protected":false},"excerpt":{"rendered":"
El dimecres 2 de mar\u00e7 els alumnes de batxillerat cient\u00edfic van poder assistir a una xerrada sobre “perfums, aromes i sabors” impartida pel Dr. Joan Carles Ronda de la Universitat Rovira i Virgili de Tarragona. \u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0 \u00a0 \u00a0 La xerrada girava entorn la necessitat de comprendre la influ\u00e8ncia que sobre la nostra vida exerceixen […]<\/p>\n","protected":false},"author":3,"featured_media":1943,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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