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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">vuzbiochemi</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Прикладная химия и биотехнология</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of Universities. Applied Chemistry and Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-2925</issn><issn pub-type="epub">2500-1558</issn><publisher><publisher-name>ИРНИТУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/achb.935</article-id><article-id custom-type="edn" pub-id-type="custom">GEWFBW</article-id><article-id custom-type="elpub" pub-id-type="custom">vuzbiochemi-1278</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>ФИЗИКО-ХИМИЧЕСКАЯ БИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICOCHEMICAL BIOLOGY</subject></subj-group></article-categories><title-group><article-title>Влияние физико-химических факторов на специфическую активность протеаз, применяемых в биотехнологии сыров</article-title><trans-title-group xml:lang="en"><trans-title>Influence of physicochemical factors on the specific activity of proteases used in cheesemaking biotechnology</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4492-6628</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стурова</surname><given-names>Ю. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sturova</surname><given-names>Yu. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Стурова Юлия Геннадьевна - к.т.н., доцент.</p><p>656038, Барнаул, пр. Ленина, 46</p></bio><bio xml:lang="en"><p>Yuliay G. Sturova - Cand. Sci. (Engineering), Associate Professor.</p><p>46, Lenin Ave., Barnaul, 656038</p></bio><email xlink:type="simple">y_sturova@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/0000-0003-1117-0489</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гришкова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Grishkova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гришкова Анастасия Викторовна - к.т.н., доцент, старший научный сотрудник, Доцент Алтайский ГМУ.</p><p>656016, Барнаул, ул. Советской армии, 66; 656038, Барнаул, пр. Ленина, 40</p></bio><bio xml:lang="en"><p>Anastasiya V. Grishkova - Cand. Sci. (Engineering), Associate Professor, Senior Researcher, Siberian RI Cheese Making, Associate Professor, ASMU.</p><p>40, Lenin Ave., Barnaul, 656038</p></bio><email xlink:type="simple">anastasiya-kriger@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9335-1824</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коньшин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Konshin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Коньшин Вадим Владимирович, д.х.н., доцент, заведующий кафедрой.</p><p>656038, Барнаул, пр. Ленина, 46</p></bio><bio xml:lang="en"><p>Vadim V. Konshin - Dr. Sci. (Chemistry), Associate Professor, Head of the Department.</p><p>46, Lenin Ave, Barnaul, 656038</p></bio><email xlink:type="simple">vadandral@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/0000-0002-5630-3196</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Просеков</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Prosekov</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Просеков Александр Юрьевич - д.т.н., профессор, главный научный сотрудник.</p><p>650000, Кемерово, ул. Красная, 6</p></bio><bio xml:lang="en"><p>Alexander Yu. Prosekov - Dr. Sci. (Engineering), Professor, Chief Researcher.</p><p>6, Krasnaya St., Kemerovo, 650000</p></bio><email xlink:type="simple">rector@kemsu.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Алтайский государственный технический университет им. И.И. Ползунова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Polzunov Altai State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Сибирский научно-исследовательский институт сыроделия; Алтайский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian Research Institute of Cheese Making; Altai State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Кемеровский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kemerovo State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>09</month><year>2024</year></pub-date><volume>14</volume><issue>3</issue><fpage>352</fpage><lpage>361</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Стурова Ю.Г., Гришкова А.В., Коньшин В.В., Просеков А.Ю., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Стурова Ю.Г., Гришкова А.В., Коньшин В.В., Просеков А.Ю.</copyright-holder><copyright-holder xml:lang="en">Sturova Y.G., Grishkova A.V., Konshin V.V., Prosekov A.Y.</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://vuzbiochemi.elpub.ru/jour/article/view/1278">https://vuzbiochemi.elpub.ru/jour/article/view/1278</self-uri><abstract><p>В технологии производства сыров важным технологическим звеном является получение сгустка под влиянием протеолитических ферментов. В зависимости от состава молокосвертывающие ферментные препараты по-разному влияют на качественные характеристики сгустка, отделение сыворотки и выход готового продукта. Сегодня на российском рынке представлен широкий ассортимент отечественных и импортных молокосвертывающих ферментных препаратов. В связи с этим выбор коагулянта молока сыродельными предприятиями должен осуществляться в соответствии с тем, сыры какой группы вырабатываются предприятием. На молокосвертывающую активность ферментных препаратов может оказывать влияние активная кислотность смеси, а также температура раствора при приготовлении ферментного препарата, так как она является основным показателем продолжительности свертывания смеси и, следовательно, качества образованного сгустка. Исследование специфической активности молокосвертывающих ферментных препаратов при их приготовлении в рабочем растворе с различной активной кислотностью (рН от 4,0 до 8,0) показало, что при сдвиге активной кислотности в щелочную сторону молокосвертывающая активность всех препаратов значительно снижалась. Применение растворов с рН 4,0 приводило к увеличению молокосвертывающей активности говяжьего пепсина на 94%, сычужно-говяжьего препарата ВНИИМС СГ-50 – на 72%, сычужного фермента – на 36% относительно контроля. Самым чувствительным к колебаниям активной кислотности являлся говяжий пепсин. Исследование влияния температуры субстрата в диапазоне от 30 до 40 °С показало, наибольшей чувствительностью к изменению температуры отличался сычужный фермент. Проведенные исследования показали, что правильно подобранная ферментная композиция является действенным рычагом, влияющим на качество вырабатываемого сыра.</p></abstract><trans-abstract xml:lang="en"><p>The formation of a clot under the influence of proteolytic enzymes is an essential stage in cheesemaking technology. Depending on their composition, milk-clotting enzyme preparations have a different effect on the quality characteristics of the clot, whey separation, and yield of the finished product. At present, the Russian market offers a wide range of domestic and imported milk-clotting enzyme preparations. In this connection, the choice of a milk coagulant by cheese makers should be carried out in accordance with the cheese group produced by the enterprise. The milk-clotting activity of enzyme preparations depends not only on the active acidity of the mixture, but also on the temperature of the solution used to obtain them. It is the solution temperature that has a determining effect on the duration of the coagulation process and, therefore, the quality of the formed clot. Research into the specific activity of milk-clotting enzyme preparations, obtained in a working solution with different active acidity (pH from 4.0 to 8.0), showed their milk-clotting activity to decrease significantly upon pH shifting to the alkaline region. Application of solutions with a pH of 4.0 led to an increase in the milk-clotting activity of bovine pepsin, VNIIMS SG-50 rennet-bovine preparation, and rennet enzyme by 94, 72, and 36%, respectively, relative to the control. Bovine pepsin demonstrated the highest sensitivity to fluctuations in active acidity. A study into the effect of substrate temperature in the range from 30 to 40 °C established rennet to be the most sensitive preparation to temperature changes. It is concluded that a properly selected enzyme composition is an effective means for affecting the quality of cheese products.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>молокосвертывающие ферменты</kwd><kwd>молокосвертывающая активность</kwd><kwd>термостабильность</kwd><kwd>ферментативное свертывание</kwd><kwd>активная кислотность</kwd><kwd>пепсин</kwd><kwd>химозин</kwd><kwd>ферментные композиции</kwd></kwd-group><kwd-group xml:lang="en"><kwd>milk-clotting enzymes</kwd><kwd>milk-clotting activity</kwd><kwd>thermostability</kwd><kwd>enzymatic coagulation</kwd><kwd>active acidity</kwd><kwd>pepsin</kwd><kwd>chymosin</kwd><kwd>enzyme compositions</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">Kumar A., Sasmal S. 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