{"id":7551,"date":"2026-09-24T09:53:56","date_gmt":"2026-09-24T09:53:56","guid":{"rendered":"https:\/\/www.mediapreparators.com\/blog\/effects-of-precise-ph-control-on-culture-media-quality\/"},"modified":"2026-09-24T11:02:18","modified_gmt":"2026-09-24T11:02:18","slug":"effects-of-precise-ph-control-on-culture-media-quality","status":"publish","type":"blog","link":"https:\/\/www.mediapreparators.com\/en\/blog\/effects-of-precise-ph-control-on-culture-media-quality\/","title":{"rendered":"Effects of precise pH control on culture media quality"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">Tiempo de lectura:<\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">minutos<\/span><\/span>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"7551\" class=\"elementor elementor-7551 elementor-7529\" data-elementor-post-type=\"blog\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e1f630e e-flex e-con-boxed e-con e-parent\" data-id=\"e1f630e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-f20dd46 e-con-full e-flex e-con e-child\" data-id=\"f20dd46\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-009ee50 elementor-widget elementor-widget-text-editor\" data-id=\"009ee50\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/www.mediapreparators.com\/en\/blog\/\">Blog &gt;<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3435ee elementor-widget elementor-widget-text-editor\" data-id=\"e3435ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tEffects of precise pH control on culture media quality\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7ff2ecc e-con-full e-flex e-con e-child\" data-id=\"7ff2ecc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-072a703 e-con-full e-flex e-con e-child\" data-id=\"072a703\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a497ea elementor-widget elementor-widget-heading\" data-id=\"2a497ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Effects of precise pH control on culture media quality<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eb6de92 elementor-widget elementor-widget-text-editor\" data-id=\"eb6de92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tDiscover how precise pH control affects the quality, stability, and reproducibility of culture media.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7642c33 elementor-icon-list--layout-inline elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"7642c33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-inline-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">RAYPA Lab<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\"><span class=\"span-reading-time rt-reading-time\"><span class=\"rt-label rt-prefix\"><\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">min read<\/span><\/span><\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-inline-item\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Last updated: 24\/09\/2026<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c38b46b e-con-full e-flex e-con e-parent\" data-id=\"c38b46b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6e491b2 elementor-widget elementor-widget-progress-tracker\" data-id=\"6e491b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;percentage&quot;:&quot;yes&quot;,&quot;percentage_color&quot;:&quot;#FFFFFF&quot;,&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_offset&quot;:72,&quot;type&quot;:&quot;horizontal&quot;,&quot;relative_to&quot;:&quot;entire_page&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_effects_offset&quot;:0,&quot;sticky_anchor_link_offset&quot;:0}\" data-widget_type=\"progress-tracker.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n\t\t<div class=\"elementor-scrolling-tracker elementor-scrolling-tracker-horizontal elementor-scrolling-tracker-alignment-\">\n\t\t\t\t\t\t<div class=\"current-progress\">\n\t\t\t\t\t<div class=\"current-progress-percentage\"><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<article class=\"elementor-element elementor-element-a0492fe e-flex e-con-boxed e-con e-parent\" data-id=\"a0492fe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ac56ad1 e-con-full e-flex e-con e-child\" data-id=\"ac56ad1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-d68209e e-con-full e-flex e-con e-child\" data-id=\"d68209e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_offset&quot;:100,&quot;sticky_effects_offset&quot;:100,&quot;sticky_parent&quot;:&quot;yes&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_anchor_link_offset&quot;:0}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-aea318f elementor-toc--minimized-on-mobile elementor-widget elementor-widget-table-of-contents\" data-id=\"aea318f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;&quot;,&quot;library&quot;:&quot;&quot;},&quot;no_headings_message&quot;:&quot;No se encontraron t\\u00edtulos en esta p\\u00e1gina.&quot;,&quot;collapse_subitems&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;mobile&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of Contents\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__aea318f\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__aea318f\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__aea318f\" class=\"elementor-toc__body elementor-toc__list-items--collapsible\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b560b2a e-con-full e-flex e-con e-child\" data-id=\"b560b2a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-faa9b4e e-con-full e-flex e-con e-child\" data-id=\"faa9b4e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f9f3bd8 elementor-widget elementor-widget-heading\" data-id=\"f9f3bd8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Summary<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-920f20e parrafo elementor-widget elementor-widget-text-editor\" data-id=\"920f20e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>pH is a key parameter in culture media preparation because it affects nutrient availability, component stability, and the conditions required for the growth of microorganisms and plant tissues. Precise pH control helps reduce batch-to-batch variability and achieve more consistent and reproducible results. <\/p><p>However, pH can change during sterilization and continue to evolve throughout the culture process. Proper media preparation therefore involves more than simply adjusting an initial pH value. It requires understanding how each formulation responds throughout the process and establishing consistent measurement, control, and recording conditions. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dca7399 e-con-full e-flex e-con e-child\" data-id=\"dca7399\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-b3208e0 e-con-full e-flex e-con e-child\" data-id=\"b3208e0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c24519d elementor-widget elementor-widget-heading\" data-id=\"c24519d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is pH and why is it important in culture media?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6e6ff26 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"6e6ff26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>pH is a measure related to the activity of hydrogen ions (H\u207a) in a solution and indicates its degree of acidity or alkalinity <a href=\"#bibliografia\">(1)<\/a>.<\/p><p>In culture media, pH:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-afcd9c1 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"afcd9c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Influences the solubility and availability of many nutrients and media components, including phosphates, iron, and other minerals.<\/li><li>Affects enzymatic activity and the metabolic pathways of cultured cells.<\/li><li>Helps create suitable conditions for the growth of microorganisms and plant tissues.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75f4753 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"75f4753\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>An inappropriate pH can therefore alter both the chemical properties of the medium and the biological response of the culture <a href=\"#bibliografia\">(2)<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2bacae1 e-con-full e-flex e-con e-child\" data-id=\"2bacae1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4a4a9e8 e-con-full e-flex e-con e-child\" data-id=\"4a4a9e8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-46af232 elementor-widget elementor-widget-heading\" data-id=\"46af232\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How does pH affect culture media quality?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ee3467 elementor-widget elementor-widget-heading\" data-id=\"9ee3467\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. Nutrient availability<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-df8c520 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"df8c520\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>pH affects the solubility and availability of many nutrients present in culture media.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f331504 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"f331504\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p><strong>Phosphates and micronutrients<\/strong>: pH can alter the solubility and chemical form of many media components. Inappropriate pH values may promote precipitate formation or reduce the availability of certain nutrients, particularly some metallic micronutrients. These effects depend on the specific composition of the medium and the interactions among its components.  <\/p><\/li><li><p><strong>Nitrogen sources<\/strong>: In plant culture media, the uptake and assimilation of ammonium (NH\u2084\u207a) and nitrate (NO\u2083\u207b) are closely associated with pH. NH\u2084\u207a uptake tends to acidify the medium, whereas NO\u2083\u207b uptake may contribute to an increase in pH. Therefore, the ratio between these two nitrogen sources can influence how pH evolves during culture <a href=\"#bibliografia\">(3)<\/a>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8f0b6c elementor-widget elementor-widget-heading\" data-id=\"b8f0b6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. Chemical stability of the medium<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1bd3de0 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"1bd3de0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Many culture media components, including vitamins, hormones, and growth regulators, can be affected by pH.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5d6550 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"e5d6550\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p><strong>Growth regulators<\/strong>: The stability and activity of some plant growth regulators, including certain auxins, may be affected by pH. Other factors, such as temperature, light, and media composition, can also influence their stability <a href=\"#bibliografia\">(4)<\/a>.<\/p><\/li><li><p><strong>Vitamins<\/strong>: The stability of certain vitamins present in culture media may depend on pH, temperature, and the duration of heat exposure. Both the media formulation and sterilization conditions can therefore affect vitamin stability <a href=\"#bibliografia\">(5)<\/a>. <\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ddeb6c elementor-widget elementor-widget-heading\" data-id=\"6ddeb6c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Growth of microorganisms and plant tissues<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b94ee1 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"2b94ee1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Each organism has specific pH conditions that support optimal growth.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b43ba69 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"b43ba69\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p><strong>Microorganisms<\/strong>: Many bacteria grow optimally at pH values close to neutral, whereas many fungi and yeasts tolerate and grow well under more acidic conditions. However, the optimal range varies among microorganisms <a href=\"#bibliografia\">(6)<\/a><a href=\"#bibliografia\">(7)<\/a>. <\/p><\/li><li><p><strong>Plant tissues<\/strong>: In many in vitro culture protocols, the medium is typically adjusted to approximately pH 5.5\u20136.0 before sterilization, although the optimal value depends on the plant species, tissue type, and formulation being used <a href=\"#bibliografia\">(2)<\/a><a href=\"#bibliografia\">(8)<\/a>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a3e3f8 elementor-widget elementor-widget-heading\" data-id=\"4a3e3f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">4. Interaction with gelling agents<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c120b32 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"c120b32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In solid media, pH can also affect the properties of the gelling agent.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8f2c8bc parrafo elementor-widget elementor-widget-text-editor\" data-id=\"8f2c8bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p><strong>Agar<\/strong>: pH can influence its gelling properties. In particular, acidic conditions combined with heat treatment may promote agar hydrolysis and subsequently reduce gel firmness <a href=\"#bibliografia\">(9)<\/a>. <\/p><\/li><li><p><strong>Gellan gum<\/strong>: Its gelling properties are also influenced by pH and, in particular, by the ionic composition of the medium. Changes in these conditions may therefore alter gel firmness <a href=\"#bibliografia\">(10)<\/a>.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-159a86f e-con-full e-flex e-con e-child\" data-id=\"159a86f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-190a9e3 elementor-widget elementor-widget-heading\" data-id=\"190a9e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What happens to pH during sterilization?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a84f519 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"a84f519\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The pH measured before sterilization does not always match the final pH of the medium.<\/p><p>Exposure to high temperatures can cause changes related to the composition of the medium, its buffering capacity, and interactions among its different components. In plant culture media, for example, differences have been documented between the initially adjusted pH and the pH measured after autoclaving <a href=\"#bibliografia\">(8)<\/a>. <\/p><p>This means that correctly adjusting pH before heat treatment does not necessarily guarantee that the medium will have exactly the same pH after sterilization.<\/p><p>For this reason, when final pH is critical to an application, it is advisable to characterize how the formulation behaves after sterilization.<\/p><p>An appropriate strategy is to experimentally determine the pH change caused by the sterilization process and, when necessary, establish a validated preparation procedure that accounts for this variation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e1afdd7 e-con-full e-flex e-con e-child\" data-id=\"e1afdd7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fc7adfa elementor-widget elementor-widget-heading\" data-id=\"fc7adfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to measure and adjust pH correctly<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6d4d09d parrafo elementor-widget elementor-widget-text-editor\" data-id=\"6d4d09d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Reproducible pH control begins with clearly defined measurement and preparation conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dc26552 elementor-widget elementor-widget-heading\" data-id=\"dc26552\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">1. pH measurement<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-096a14b parrafo elementor-widget elementor-widget-text-editor\" data-id=\"096a14b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Using a properly calibrated pH meter is essential for obtaining reliable results. The instrument should be calibrated using certified buffer solutions appropriate for the pH range being measured, in accordance with the manufacturer&#8217;s recommendations. <\/p><p>Measurement temperature should also be taken into account. Both electrode response and the actual pH of the solution may vary with temperature, so measurements should be performed under defined and consistent conditions <a href=\"#bibliografia\">(11)<\/a>. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a57c4b elementor-widget elementor-widget-heading\" data-id=\"2a57c4b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">2. pH adjustment<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20886dd parrafo elementor-widget elementor-widget-text-editor\" data-id=\"20886dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Acidic or alkaline solutions can be used to adjust pH. Hydrochloric acid (HCl) and sodium hydroxide (NaOH) are among the most commonly used. <\/p><p>During adjustment, adequate mixing is important to ensure that the added solution is distributed evenly and that the measured pH is representative of the entire volume.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-935c0c9 elementor-widget elementor-widget-heading\" data-id=\"935c0c9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">3. Verification and documentation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9b0e058 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"9b0e058\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>pH should be monitored at relevant stages of the media preparation process.<\/p><p>Depending on the application, it may be useful to record pH both before and after sterilization. This information helps characterize how a specific formulation responds to heat treatment and facilitates comparison between batches. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6ce2b5f e-con-full e-flex e-con e-child\" data-id=\"6ce2b5f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dbf1c9e elementor-widget elementor-widget-heading\" data-id=\"dbf1c9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why can pH change during culture?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-70c97f0 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"70c97f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Changes in pH do not stop once the medium has been prepared and sterilized.<\/p><p>The metabolic activity of microorganisms or cultured tissues can cause the medium to become progressively more acidic or alkaline. The magnitude and direction of this change depend on factors including the organism, media composition, and the nutrients consumed during growth <a href=\"#bibliografia\">(8)<\/a><a href=\"#bibliografia\">(3)<\/a>. <\/p><p>When required by the application, buffering systems that are compatible with the organism, formulation, and working pH range can be used.<\/p><p>Buffer selection should also take into account factors such as temperature and potential interactions with other media components.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-034a00c e-con-full e-flex e-con e-child\" data-id=\"034a00c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7768ca3 elementor-widget elementor-widget-heading\" data-id=\"7768ca3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Benefits of precise pH control<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0d1a92d parrafo elementor-widget elementor-widget-text-editor\" data-id=\"0d1a92d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Consistent pH control during media preparation provides several advantages:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ff50117 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"ff50117\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li><p><strong>Greater reproducibility<\/strong>: It helps reduce batch-to-batch variability and facilitates comparison of results.<\/p><\/li><li><p><strong>Suitable growth conditions<\/strong>: Maintaining pH within the appropriate range for each microorganism or tissue helps provide suitable conditions for growth and development.<\/p><\/li><li><p><strong>Prevention of chemical issues<\/strong>: Maintaining an appropriate pH helps reduce problems related to the precipitation of certain components or the degradation of sensitive substances.<\/p><\/li><li><p><strong>Greater process control<\/strong>: Recording pH at different stages helps identify variations associated with the formulation or heat treatment.<\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a1de0a elementor-widget elementor-widget-heading\" data-id=\"3a1de0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">The role of media preparators in pH control<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80ee7a4 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"80ee7a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Automating culture media preparation makes it possible to control and standardize different stages of the process, reducing some of the variability associated with manual operations.<\/p><p>Modern media preparators can incorporate pH control systems with features such as:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3983bdf parrafo elementor-widget elementor-widget-text-editor\" data-id=\"3983bdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><p><strong>Real-time measurement<\/strong>: Sensors can be used to monitor pH throughout the preparation process.<\/p><\/li><li><p><strong>pH adjustment<\/strong>: In systems equipped with this functionality, controlled additions of acidic or alkaline solutions can be made to reach the specified pH value.<\/p><\/li><li><p><strong>Reduced manual handling<\/strong>: Processing media in closed systems and automating certain stages can reduce manual handling and, as a result, lower the risk of contamination during preparation.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e15a5e4 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"e15a5e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>In addition, standardizing parameters such as temperature, time, agitation, and sterilization conditions helps achieve more consistent results across different batches.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07fda61 elementor-widget elementor-widget-heading\" data-id=\"07fda61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Conclusion<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14e401e parrafo elementor-widget elementor-widget-text-editor\" data-id=\"14e401e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>pH control is a fundamental factor in achieving consistent and reproducible culture media. It affects nutrient solubility and availability, the stability of certain components, the properties of gelling agents, and the growth conditions of microorganisms and plant tissues. <\/p><p>However, pH should not be considered simply as a value adjusted before sterilization. It may change during heat treatment and continue to evolve later during the culture process. <\/p><p>Correctly defining the target pH, controlling measurement conditions, understanding how each formulation responds to sterilization, and recording relevant parameters can help reduce batch-to-batch variability and improve process reproducibility.<\/p><p><a href=\"https:\/\/www.mediapreparators.com\/en\/media-preparators\/\"><strong>Media preparators<\/strong><\/a> make it possible to standardize and control critical stages of media preparation, reducing variability associated with manual processes and facilitating the production of consistent culture media.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cbf2fb1 e-con-full e-flex e-con e-child\" data-id=\"cbf2fb1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-af827f1 e-con-full e-flex e-con e-child\" data-id=\"af827f1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-044ea53 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"044ea53\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Would you like to improve control and reproducibility in your culture media preparation process?<\/strong><\/p><p>Our team can help you identify the solution best suited to your laboratory processes and requirements.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b63b00d elementor-align-center elementor-widget elementor-widget-button\" data-id=\"b63b00d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/portal.raypa.com\/contact?marca=mp&#038;lang=en\" target=\"_blank\" rel=\"noopener\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Speak with a specialist<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9290140 elementor-widget elementor-widget-heading\" data-id=\"9290140\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">References<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bfc9cd6 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"bfc9cd6\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"bibliografia\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ol><li><p>IUPAC. <em>pH<\/em>. Compendium of Chemical Terminology (the \u201cGold Book\u201d), 5th ed. International Union of Pure and Applied Chemistry, 2025. DOI: 10.1351\/goldbook.P04524.    <a href=\"https:\/\/goldbook.iupac.org\/terms\/view\/P04524\" target=\"_blank\" rel=\"noopener\">IUPAC Gold Book \u2014 pH<\/a><\/p><\/li><li><p>Funnekotter, B., Mancera, R. L., &#038; Bunn, E. (2023). <em>A Simple but Effective Combination of pH Indicators for Plant Tissue Culture<\/em>. Plants, 12(4), 740. DOI: 10.3390\/plants12040740. <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC9959788\/\" target=\"_blank\" rel=\"noopener\">Article in PubMed Central<\/a><\/p><\/li><li><p>Pasternak, T. P., &#038; Steinmacher, D. (2024). <em>Plant Growth Regulation in Cell and Tissue Culture In Vitro<\/em>. Plants, 13(2), 327. DOI: 10.3390\/plants13020327. <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC10818547\/\" target=\"_blank\" rel=\"noopener\">Article in PubMed Central<\/a><\/p><\/li><li><p>Dunlap, J. R., &#038; Robacker, K. M. (1988). <em>Nutrient Salts Promote Light-Induced Degradation of Indole-3-Acetic Acid in Tissue Culture Media<\/em>. Plant Physiology, 88(2), 379\u2013382. DOI: 10.1104\/pp.88.2.379.   <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC1055585\/\" target=\"_blank\" rel=\"noopener\">Article in PubMed Central<\/a><\/p><\/li><li><p>Schnellbaecher, A., Binder, D., Bellmaine, S., &#038; Zimmer, A. (2019). <em>Vitamins in cell culture media: Stability and stabilization strategies<\/em>. Biotechnology and Bioengineering, 116(6), 1537\u20131555. DOI: 10.1002\/bit.26942.   <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6594077\/\" target=\"_blank\" rel=\"noopener\">Article in PubMed Central<\/a><\/p><\/li><li><p>Krulwich, T. A., Sachs, G., &#038; Padan, E. (2011). <em>Molecular aspects of bacterial pH sensing and homeostasis<\/em>. Nature Reviews Microbiology, 9, 330\u2013343. DOI: 10.1038\/nrmicro2549.   <a href=\"https:\/\/www.nature.com\/articles\/nrmicro2549\" target=\"_blank\" rel=\"noopener\">Article in Nature Reviews Microbiology<\/a><\/p><\/li><li><p>Bansfield, D., Spilling, K., Mikola, A., &#038; Piiparinen, J. (2023). <em>Growth of fungi and yeasts in food production waste streams: a feasibility study<\/em>. BMC Microbiology, 23, 328. DOI: 10.1186\/s12866-023-03083-6.   <a href=\"https:\/\/link.springer.com\/article\/10.1186\/s12866-023-03083-6\" target=\"_blank\" rel=\"noopener\">Article in BMC Microbiology<\/a><\/p><\/li><li><p>Skirvin, R. M., Chu, M. C., Mann, M. L., Young, H., Sullivan, J., &#038; Fermanian, T. (1986). <em>Stability of tissue culture medium pH as a function of autoclaving, time, and cultured plant material<\/em>. Plant Cell Reports, 5(4), 292\u2013294. DOI: 10.1007\/BF00269825. <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/24248250\/\" target=\"_blank\" rel=\"noopener\">Reference in PubMed<\/a><\/p><\/li><li><p>EFSA ANS Panel. (2016). <em>Re-evaluation of agar (E 406) as a food additive<\/em>. EFSA Journal, 14. DOI: 10.2903\/j.efsa.2016.4645.   <\/p><\/li><li><p>Morris, E. R., Nishinari, K., &#038; Rinaudo, M. (2012). <em>Gelation of gellan \u2013 A review<\/em>. Food Hydrocolloids, 28(2), 373\u2013411. DOI: 10.1016\/j.foodhyd.2012.01.004.   <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0268005X12000057\" target=\"_blank\" rel=\"noopener\">Article in ScienceDirect<\/a><\/p><\/li><li><p>U.S. Geological Survey. (2021). <em>Chapter A6.4. Measurement of pH<\/em>. Techniques and Methods 9-A6.4. DOI: 10.3133\/tm9A6.4.    <a href=\"https:\/\/pubs.usgs.gov\/publication\/tm9A6.4\" target=\"_blank\" rel=\"noopener\">Official USGS Guide<\/a><\/p><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8ff775d e-con-full elementor-hidden-tablet elementor-hidden-mobile e-flex e-con e-child\" data-id=\"8ff775d\" data-element_type=\"container\" data-e-type=\"container\" id=\"barra-lateral\">\n\t\t<div class=\"elementor-element elementor-element-9191129 e-con-full e-flex e-con e-child\" data-id=\"9191129\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_offset&quot;:100,&quot;sticky_effects_offset&quot;:100,&quot;sticky_parent&quot;:&quot;yes&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;,&quot;mobile&quot;],&quot;sticky_anchor_link_offset&quot;:0}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a3044ff elementor-widget elementor-widget-image\" data-id=\"a3044ff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"200\" height=\"200\" src=\"https:\/\/www.mediapreparators.com\/wp-content\/uploads\/2026\/03\/raypa-lab-user.png\" class=\"attachment-full size-full wp-image-6756\" alt=\"\" srcset=\"https:\/\/www.mediapreparators.com\/wp-content\/uploads\/2026\/03\/raypa-lab-user.png 200w, https:\/\/www.mediapreparators.com\/wp-content\/uploads\/2026\/03\/raypa-lab-user-150x150.png 150w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b2e8db0 e-con-full e-flex e-con e-child\" data-id=\"b2e8db0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3b83c6f elementor-widget elementor-widget-heading\" data-id=\"3b83c6f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">RAYPA Lab<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a142ac2 parrafo elementor-widget elementor-widget-text-editor\" data-id=\"a142ac2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tTeam of professionals specialized in autoclave sterilization and culture media preparation, with expertise in microbiology, quality control, and biotechnology.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2f649a2 e-con-full e-flex e-con e-child\" data-id=\"2f649a2\" 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