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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">atu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Алматинского технологического университета</journal-title><trans-title-group xml:lang="en"><trans-title>The Journal of Almaty Technological University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2304-568X</issn><issn pub-type="epub">2710-0839</issn><publisher><publisher-name>АО "АТУ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.48184/2304-568X-2026-2-85-94</article-id><article-id custom-type="elpub" pub-id-type="custom">atu-3096</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕХНОЛОГИЯ ПИЩЕВОЙ И ПЕРЕРАБАТЫВАЮЩЕЙ ПРОМЫШЛЕННОСТИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FOOD AND PROCESSING INDUSTRY TECHNOLOGY</subject></subj-group></article-categories><title-group><article-title>Оптимизация параметров добавления низко- и высокометоксилированных пектинов в творожную массу в геропротекторных целях</article-title><trans-title-group xml:lang="en"><trans-title>Optimization of parameters for adding low- and high-methoxylated pectins to curd mass for geroprotective purposes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0868-127X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Еркебаева</surname><given-names>С. У.</given-names></name><name name-style="western" xml:lang="en"><surname>Yerkebayeva</surname><given-names>S. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>160012, г.Шымкент, проспект Тауке хана, 5</p></bio><bio xml:lang="en"><p> 160012, Shymkent, Tauke Khan Avenue, 5</p></bio><email xlink:type="simple">erkesapash@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-7571-3614</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Отеш</surname><given-names>А. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Otesh</surname><given-names>A. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>160012, г.Шымкент, проспект Тауке хана, 5</p></bio><bio xml:lang="en"><p> 160012, Shymkent, Tauke Khan Avenue, 5</p></bio><email xlink:type="simple">otesh.aidana2021@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Некоммерческое акционерное общество «Южно-Казахстанский университет им.М.Ауэзова»<country>Казахстан</country></aff><aff xml:lang="en">"M.Auezov South Kazakhstan University" non-profit joint stock company<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>19</day><month>06</month><year>2026</year></pub-date><volume>152</volume><issue>2</issue><fpage>85</fpage><lpage>94</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Еркебаева С.У., Отеш А.Т., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Еркебаева С.У., Отеш А.Т.</copyright-holder><copyright-holder xml:lang="en">Yerkebayeva S.U., Otesh A.T.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://atu.ejournal.kz/jour/article/view/3096">https://atu.ejournal.kz/jour/article/view/3096</self-uri><abstract><p>Считается, что пектины обладают геропротекторными свойствами за счет энтеросорбции, антиоксидантной активности и стабилизации структуры молока. Целью исследования является научное обоснование оптимального значения рН, количества и стадий добавления низкометоксилированного и высокометоксилированного пектина в творожную массу для достижения максимальной влагоудерживающей способности, наименьшего значения синерезиса и улучшения структурно-механических свойств. Исследовали добавление низкометоксилированного и высокометоксилированного пектина по отдельности и в комбинации в количестве 0,25–1,5% при рН 3,0–6,0. Кроме того, был проведен тест при рН в диапазоне 4,1–4,5 для комбинированного добавления. Были оценены влагоудерживающая способность, синерезис, твердость и когезивность, а также вязкость. Равномерность распределения пектина контролировали методом метиленового синего и кальций-пектатным методом; распределение было признано равномерным во всех образцах. Эксперименты проводились трижды, статистическая обработка выполнена с использованием ANOVA post-hoc и критерия Тьюки (p&lt;0,05). Оптимальный уровень рН для высокометоксилированного пектина составил 3,5, для низкометоксилированного – 4,6. В очень узком диапазоне рН 4,3 синерезис был самым высоким при соотношении 50:50. Оптимальное количество каждого пектина составило 1,0%. Добавление на начальном этапе (в свежеприготовленный творог из коровьего молока) эффективно для обоих видов пектина, но для комбинированного добавления был предложен способ: в свежеприготовленный творог добавляют низкометоксилированный пектин, а в готовую творожную массу — высокометоксилированный пектин. При рН 4,3 соотношение пектинов 50:50 обеспечило максимальную влагоудерживающую способность (78,0%), минимальный синерезис (3,2% в первый день, 8,0% через 14 дней) и твердость 0,67 Н. По сравнению со значением контрольного эксперимента (2,9 ммоль/кг) перекисное число липидной фракции через 14 дней составило 1,6 ммоль/кг, что ниже порога окисления для молочных продуктов (≤4 ммоль/кг). Рекомендуемые параметры: общая концентрация пектинов 1,0% (0,5% низкометоксилированного +0,5% высокометоксилированного), рН 4,3, добавление низкометоксилированного пектина на начальном этапе и высокометоксилированного — на заключительном. Готовая творожная масса обладала улучшенными геропротекторными и структурно механическими характеристиками.</p></abstract><trans-abstract xml:lang="en"><p>Pectins are considered to have geroprotective properties through enterosorption, antioxidant activity and stabilization of milk structure. The aim of the study is to scientifically substantiate the optimal pH, amount and stages of addition of low-methoxylated and high-methoxylated pectin to the curd mass in order to achieve the maximum moisture retention capacity, the lowest syneresis value and improved structural and mechanical properties. The addition of low-methoxylated and high-methoxylated pectin separately and in combination at amounts of 0.25–1.5% was studied at pH 3.0–6.0. In addition, a pH test was carried out in the range of 4.1–4.5 for combined addition. Moisture retention capacity, syneresis, hardness and cohesiveness, and viscosity were evaluated. The uniformity of pectin distribution was controlled by the methylene blue dye method and the Ca-pectate method, and the distribution was recognized as uniform in all samples. The experiments were carried out three times and statistical processing was performed using ANOVA post-hoc with Tukey's criterion (p&lt;0.05). The optimal pH for high-methoxylated pectin was 3.5, for low-methoxylated pectin – 4.6. Within a very narrow pH range of 4.3, the syneresis value was the highest at a 50:50 ratio. The optimal amount of each pectin was 1.0%. Addition at the initial stage (to freshly prepared curd from cow's milk) is effective for both types of pectin, but for combined addition, a method was proposed: adding low-methoxylated pectin to freshly prepared curd, and high-methoxylated pectin to the finished curd mass. At pH 4.3, the 50:50 pectin ratio provided the maximum moisture retention capacity (78.0%), the minimum syneresis (3.2% on the initial day, 8.0% after 14 days) and a hardness of 0.67 N. Compared to the control experiment value of 2.9 mmol/kg, the lipid peroxidation value after 14 days was 1.6 mmol/kg (which is below the oxidation threshold for dairy products of ≤4 mmol/kg). Recommended parameters: total pectin concentration 1.0% (0.5% low-methoxylated pectin + 0.5% high-methoxylated pectin), pH 4.3, addition of low-methoxylated pectin at the initial stage, and high-methoxylated pectin at the final stage. The finished curd mass had improved geroprotective and structural-mechanical characteristics.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>низкометоксилированный пектин</kwd><kwd>высокометоксилированный пектин</kwd><kwd>творожная масса</kwd><kwd>геропротекторные свойства</kwd><kwd>влагоудерживающая способность</kwd><kwd>синерезис</kwd></kwd-group><kwd-group xml:lang="en"><kwd>low-methoxylated pectin</kwd><kwd>high-methoxylated pectin</kwd><kwd>curd mass</kwd><kwd>geroprotective properties</kwd><kwd>moisture retention capacity</kwd><kwd>syneresis</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Yadav K., Yadav S., Anand G., Yadav P. K., Yadav D. 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