{"id":1187,"date":"2019-07-17T03:33:59","date_gmt":"2019-07-17T01:33:59","guid":{"rendered":"https:\/\/glutenlight.eu\/?p=1187"},"modified":"2019-07-22T03:24:44","modified_gmt":"2019-07-22T01:24:44","slug":"fermentazione-della-pasta-acida","status":"publish","type":"post","link":"https:\/\/glutenlight.eu\/?p=1187","title":{"rendered":"Fermentazione della pasta acida (III parte)"},"content":{"rendered":"<p><strong><em>Carbohydrate metabolism <\/em><\/strong><br \/>\n\u201cThe ratio between lactic and acetic acid is an important factor that might affect the aroma profile and structure of final product. <strong>Acetic acid, produced by heterofermentative LAB, is responsible for a shorter and harder gluten,<\/strong> while lactic acid can gradually account for a more elastic gluten structure (Lorenz, 1983; Corsetti &amp; Settani, 2007).<br \/>\n<strong><em>Influence of Acidification on Dough Rheological Properties <\/em><\/strong><strong><em>Daliborka Koceva Komleni<\/em><\/strong><strong><em>c\u0301<\/em><\/strong><strong><em>, Vedran Sla<\/em><\/strong><strong><em>c\u030c<\/em><\/strong><strong><em>anac and Marko Juki<\/em><\/strong><strong><em>c\u0301 Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Croatia 2012- <\/em><\/strong><a href=\"http:\/\/www.intchopen\"><strong><em>www.intchopen<\/em><\/strong><\/a><strong><em>. )\u201d<\/em><\/strong><\/p>\n<p><strong><em>Metabolism of proteins <\/em><\/strong><br \/>\n\u201cAccording to the results of studies performed by Gerez et. al. (2006) 13 nine lactobacilli and four pediococci were able to use gluten as a nitrogen source. Gerez et. al. (2006) also reported an increase in essential amino acids (treonine, valine, lysine and phenylalanine) in a gluten based medium fermented by LAB strains.<br \/>\nSubstantial hydrolysis of gliadinin and glutenin proteins occurs during sourdough fermentation. Proteolityc activity in sourdough originates not only from LAB enzymes, than derives also from the cereal materials present in sourdough (Thiele, 2002; Thiele, 2004). Except activity of own enzymes, LAB contribute to overall proteolysis during sourdough fermentation by creating optimum (acidic) conditions for activity of cereal proteinases (Vermeulen et al. 2006). The partial hydrolysis of glutenins during sourdough fermentation results in depolymerisation and solubilisation of the gluten macro peptide (GMP). After 24 hours of fermentation with defined lactobacill strains, all gluten proteins were SDS-soluble (Thiele et. al., 2003). Glutathione (GSH) is the most relevant reducing agent in wheat doughs (Grosh &amp; Wieser, 1999). Heterofermentative lactobacilli express glutathione reductase during growth in dough and reduce extracellular oxidized glutathione (GSSG) (J\u00e4nsch et. al., 2007). The continuous transformation of GSSG to GSH by LAB metabolism maintains high SH levels in wheat doughs, and increase the amount of SH-groups in gluten proteins (Vermeulen et. al., 2006)<br \/>\nThe level of individual amino acids in wheat dough depends on the pH level of dough, fermentation time and the consumption of amino acids by the fermentative microflora (Thiele et. al., 2002). In wheat sourdoughs, Lb. brevis linderi, Lb safransciensis, Lb. brevis and Lb. plantarum have been reported to increase the levels of aliphatic, dicarboxylic and hydroxyl amino acids (Gobbetti et. al., 1994a, Gobbetti et. al., 1994b). The yeasts, S. cerevisiae and S. exiguous decrease the total level of amino acids. <strong><em>Influence of Acidification on Dough Rheological Properties <\/em><\/strong><strong><em>Daliborka Koceva Komleni<\/em><\/strong><strong><em>c\u0301<\/em><\/strong><strong><em>, Vedran Sla<\/em><\/strong><strong><em>c\u030c<\/em><\/strong><strong><em>anac and Marko Juki<\/em><\/strong><strong><em>c\u0301 Faculty of Food Technology, Josip Juraj Strossmayer University of Osijek, Croatia 2012- <\/em><\/strong><a href=\"http:\/\/www.intchopen\"><strong><em>www.intchopen<\/em><\/strong><\/a><strong><em>.)\u201d<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Carbohydrate metabolism \u201cThe ratio between lactic and acetic acid is an important factor that might affect the aroma profile and structure of final product. Acetic acid, produced by heterofermentative LAB, is responsible for a shorter and harder gluten, while lactic acid can gradually account for a more elastic gluten structure (Lorenz, 1983; Corsetti &amp; Settani, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[547,240,551,549,349,389],"class_list":["post-1187","post","type-post","status-publish","format-standard","hentry","category-articoli","tag-fermentazione-pasta-acida","tag-lab","tag-metabolismo-carboidrati","tag-metabolismo-proteine","tag-pasta-acida","tag-pasta-madre"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fermentazione della pasta acida (III parte) - Glutenlight<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/glutenlight.eu\/?p=1187\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fermentazione della pasta acida (III parte) - Glutenlight\" \/>\n<meta property=\"og:description\" content=\"Carbohydrate metabolism \u201cThe ratio between lactic and acetic acid is an important factor that might affect the aroma profile and structure of final product. 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