{"id":2474,"date":"2025-10-28T15:55:08","date_gmt":"2025-10-28T07:55:08","guid":{"rendered":"https:\/\/protein-dry-fractionation.epic-powder.com\/?p=2474"},"modified":"2025-10-28T15:55:15","modified_gmt":"2025-10-28T07:55:15","slug":"rice-starch-particle-structure-and-gelatinization-properties","status":"publish","type":"post","link":"https:\/\/protein-dry-fractionation.epic-powder.com\/it\/rice-starch-particle-structure-and-gelatinization-properties\/","title":{"rendered":"Struttura delle particelle di amido di riso e propriet\u00e0 di gelatinizzazione"},"content":{"rendered":"<p>Tra tutti i cereali conosciuti, <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/it\/\" target=\"_blank\">particelle di amido di riso<\/a> hanno le dimensioni pi\u00f9 piccole, con un diametro medio di soli<a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/it\/air-classifier-mill\/\" target=\"_blank\"> 2\u20138 \u03bcm<\/a>In confronto, <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/it\/air-classifier-mill\/\" target=\"_blank\">amido di mais<\/a> misura 5\u201325 \u03bcm, l&#039;amido di frumento 2\u201345 \u03bcm, l&#039;amido di sorgo 5\u201325 \u03bcm e l&#039;amido di patate 15\u2013100 \u03bcm.<\/p>\n\n\n\n<p>Le piccole dimensioni delle particelle e l&#039;ampia superficie specifica dell&#039;amido di riso gli conferiscono numerose propriet\u00e0 fisico-chimiche superiori rispetto ad altri amidi. Pu\u00f2 essere utilizzato come sostituto dei grassi, \u00e8 facilmente digeribile, ha un basso contenuto di lipidi e minerali e ha un legame proteico allergenico molto basso.<\/p>\n\n\n\n<p>Inoltre, l&#039;amido di riso \u00e8 il pi\u00f9 bianco tra tutti gli amidi, il che lo rende adatto come rivestimento lucido per caramelle o compresse. I ricercatori del Southern Institute della Louisiana, negli Stati Uniti, hanno sviluppato un prodotto a base di amido resistente a base di riso per pazienti obesi e diabetici. Una volta entrato nel colon, promuove la crescita di batteri benefici, migliora la flora intestinale e apporta particolari benefici alla salute intestinale.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch.webp\" alt=\"amido di riso\" class=\"wp-image-2475\" srcset=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch.webp 800w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-300x200.webp 300w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-768x512.webp 768w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/rice-starch-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-separation-of-rice-starch\">Separazione dell&#039;amido di riso<\/h2>\n\n\n\n<p>L&#039;amido di riso si trova nell&#039;endosperma dei chicchi di riso maturi. Il riso \u00e8 composto da 20% di lolla e 80% di riso integrale. Il riso bianco consumato quotidianamente si ottiene macinando la crusca e il germe del riso integrale per ottenere l&#039;endosperma.<\/p>\n\n\n\n<p>In base alla morfologia delle particelle e al contenuto di amilosio, il riso pu\u00f2 essere classificato in riso ceroso (0,8\u20132% di amilosio), riso a chicco corto (7\u201320%), riso a chicco medio (20\u201325%) e riso a chicco lungo (oltre 25%).<\/p>\n\n\n\n<p>Attualmente, i metodi di separazione dell&#039;amido di riso includono principalmente processi di macerazione alcalina, tensioattivi, ultrasuoni ed enzimatici.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-structure-and-composition-of-rice-starch-particles\">Struttura e composizione delle particelle di amido di riso<\/h2>\n\n\n\n<p>In generale, la dimensione delle particelle di amido di riso varia significativamente tra le variet\u00e0 di riso. L&#039;amido di riso glutinoso ha granuli pi\u00f9 grandi dell&#039;amido di riso indica, mentre l&#039;amido di riso japonica ha granuli pi\u00f9 piccoli.<\/p>\n\n\n\n<p>L&#039;amido di riso si presenta spesso sotto forma di granuli di amido composti, ovali o sferici con diametri compresi tra 7 e 39 \u03bcm. Ogni granulo composto contiene da 20 a 60 piccoli granuli di amido. Al microscopio elettronico, la superficie dei granuli composti appare porosa. Questi pori si formano quando i complessi amido-proteina all&#039;interno dell&#039;endosperma si separano durante l&#039;isolamento.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-gelatinization-characteristics-of-rice-starch\">Caratteristiche di gelatinizzazione dell&#039;amido di riso<\/h2>\n\n\n\n<p>Sia nelle applicazioni alimentari che in quelle industriali, l&#039;amido di riso deve essere sottoposto a riscaldamento e gelatinizzazione. Il suo comportamento di gelatinizzazione \u00e8 strettamente correlato alla sua struttura molecolare e fisico-chimica.<\/p>\n\n\n\n<p>Quando la sospensione di amido viene riscaldata a una certa temperatura, i granuli si gonfiano improvvisamente, la struttura cristallina scompare e l&#039;amilosio inizia a fuoriuscire. La birifrangenza (croce di Malta) scompare e la sospensione si trasforma in una pasta viscosa che non sedimenta rapidamente, anche senza agitazione. Questa trasformazione \u00e8 nota come gelatinizzazione dell&#039;amido, in cui il calore e l&#039;energia dell&#039;acqua convertono la struttura ordinata in una disordinata.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-process-can-be-divided-into-three-stages\">Il processo pu\u00f2 essere suddiviso in tre fasi<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine.webp\" alt=\"Macchina per la macinazione dell&#039;amido di riso\" class=\"wp-image-2477\" srcset=\"https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine.webp 800w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-300x300.webp 300w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-150x150.webp 150w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-768x768.webp 768w, https:\/\/protein-dry-fractionation.epic-powder.com\/wp-content\/uploads\/2025\/10\/Rice-starch-grinding-machine-12x12.webp 12w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prima fase:<\/strong><br>Prima di raggiungere la temperatura di gelatinizzazione, l&#039;acqua penetra nei granuli di amido attraverso gli spazi vuoti e si lega ai gruppi polari. I granuli mantengono la loro forma e la loro birifrangenza.<\/li>\n\n\n\n<li><strong>Seconda fase:<\/strong><br>Una volta raggiunta la temperatura di gelatinizzazione, i granuli di amido assorbono rapidamente acqua e si gonfiano rapidamente. La birifrangenza scompare con la disintegrazione delle regioni cristalline. Una volta che ci\u00f2 accade, il raffreddamento non pu\u00f2 ripristinare la struttura originale dei granuli.<\/li>\n\n\n\n<li><strong>Terza fase:<\/strong><br>Continuando a riscaldare, i granuli di amido gonfi si disintegrano e si dissolvono ulteriormente.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-characteristics-and-applications-of-rice-starch\">Caratteristiche e applicazioni dell&#039;amido di riso<\/h2>\n\n\n\n<p>I granuli di amido di riso sono fini, con un&#039;elevata superficie e una forte capacit\u00e0 di assorbimento. Sono inodori e non alterano il sapore degli alimenti. Con una consistenza liscia e cremosa, l&#039;amido di riso \u00e8 un ottimo sostituto dei grassi. Il suo colore bianco brillante lo rende ideale per ricoprire compresse e caramelle.<\/p>\n\n\n\n<p>Le variet\u00e0 cerose presentano una buona stabilit\u00e0 al gelo e al disgelo, prevenendo la sineresi e il restringimento durante il congelamento. L&#039;amido di riso \u00e8 inoltre ipoallergenico, il che lo rende adatto a un&#039;ampia gamma di applicazioni:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cosmetici:<\/strong> Utilizzato nelle ciprie per una buona adesione e una finitura naturale.<\/li>\n\n\n\n<li><strong>Carta e fotografia:<\/strong> Utilizzato come agente collante per stampe nitide e durature.<\/li>\n\n\n\n<li><strong>Industriale:<\/strong> Funziona come lubrificante per alimenti e gomma.<\/li>\n\n\n\n<li><strong>Cibo:<\/strong> Agisce come legante e addensante in caramelle, salse, zuppe e riso istantaneo, conferendogli una consistenza liscia.<\/li>\n\n\n\n<li><strong>Amido funzionale:<\/strong> L&#039;amido poroso offre un forte assorbimento, adatto per alimenti funzionali per neonati e anziani. L&#039;amido a lenta digeribilit\u00e0 aiuta a ridurre il carico glicemico, adatto a diabetici e atleti.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusione<\/h2>\n\n\n\n<p>Per garantire amido di riso di alta qualit\u00e0 per applicazioni alimentari, farmaceutiche e funzionali, \u00e8 essenziale un controllo preciso delle dimensioni delle particelle. <a href=\"https:\/\/protein-dry-fractionation.epic-powder.com\/it\/contact\/\" target=\"_blank\">Polvere EPIC<\/a> vanta oltre 20 anni di esperienza nella macinazione e classificazione ultrafine. L&#039;azienda fornisce sistemi avanzati di macinazione ad aria per la lavorazione efficiente e a bassa temperatura dell&#039;amido di riso.<br>Questi sistemi garantiscono inoltre un funzionamento privo di contaminazioni. Combinando macinazione e classificazione in un&#039;unica fase, la tecnologia EPIC Powder garantisce una distribuzione granulometrica stabile e un&#039;eccellente bianchezza. Migliora inoltre la funzionalit\u00e0 del prodotto e stabilisce un nuovo punto di riferimento per la produzione di amido di riso di alto valore.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"EPIC Jet Mill - Esperimento di frantumazione dell&#039;amido di mais pregelatinizzato e dell&#039;amido di mais\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Lmw4hiy1gnQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<div class=\"wp-block-contact-form-7-contact-form-selector\">\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f2347-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"2347\">\n<div class=\"screen-reader-response\"><p 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class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<input type=\"hidden\" name=\"trp-form-language\" value=\"it\"\/><\/form>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Tra tutti i cereali conosciuti, le particelle di amido di riso hanno le dimensioni pi\u00f9 piccole, con un diametro medio di soli 2-8 \u03bcm. In confronto, l&#039;amido di mais misura 5-25 \u03bcm, l&#039;amido di frumento 2-45 \u03bcm, l&#039;amido di sorgo 5-25 \u03bcm e l&#039;amido di patate 15-100 \u03bcm. Le piccole dimensioni delle particelle e l&#039;ampia superficie specifica dell&#039;amido di riso gli conferiscono molte propriet\u00e0 superiori [\u2026]<\/p>","protected":false},"author":1,"featured_media":2477,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","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":"set","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-protein-dry-fractionation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Rice Starch Particle Structure and Gelatinization Properties - Protein Fractionation &amp; 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